===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:12 FILENAME: D:\MONTARI\PE2_U17.TXT

PE-2 - Granite, Cojop, 4150m

>>NEW PARAMETERS--ZETA METHOD<<

EFFECTIVE TRACK DENSITY FOR FLUENCE MONITOR (tracks/cm^2): 3.313E+06

RELATIVE ERROR (%): 1.54

EFFECTIVE URANIUM CONTENT OF MONITOR (ppm): 39.81

ZETA FACTOR AND STANDARD ERROR (yr cm^2): 106.16 4.45

SIZE OF COUNTER SQUARE (cm^2): 6.890E-07

------ GRAIN AGES IN ORIGINAL ORDER ------

Grain RhoS (Ns) RhoI (Ni) Squares U+/-2s Grain Age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI--

1 2.27E+04 ( 1) 4.54E+05 ( 20) 64 5 2 10.0 0.2 54.8

2 3.46E+04 ( 1) 1.17E+06 ( 34) 42 14 5 5.9 0.1 30.8

3 3.63E+04 ( 1) 1.63E+06 ( 45) 40 20 6 4.5 0.1 22.9

4 0.00E+00 ( 0) 8.76E+05 ( 35) 58 11 4 3.5 0.1 19.5

5 0.00E+00 ( 0) 5.62E+05 ( 31) 80 7 2 4.0 0.1 22.2

6 0.00E+00 ( 0) 9.07E+05 ( 50) 80 11 3 2.5 0.1 13.5

7 3.02E+04 ( 1) 9.07E+05 ( 30) 48 11 4 6.7 0.1 35.2

8 0.00E+00 ( 0) 7.74E+05 ( 32) 60 9 3 3.9 0.1 21.5

9 0.00E+00 ( 0) 3.63E+05 ( 16) 64 4 2 7.8 0.3 45.5

10 2.59E+04 ( 1) 1.01E+06 ( 39) 56 12 4 5.1 0.1 26.6

11 1.81E+04 ( 1) 1.11E+06 ( 61) 80 13 3 3.3 0.1 16.7

12 0.00E+00 ( 0) 1.14E+06 ( 63) 80 14 3 1.9 0.1 10.6

13 0.00E+00 ( 0) 9.98E+05 ( 33) 48 12 4 3.7 0.1 20.8

14 0.00E+00 ( 0) 1.05E+06 ( 42) 58 13 4 2.9 0.1 16.1

15 0.00E+00 ( 0) 1.03E+06 ( 57) 80 12 3 2.2 0.1 11.8

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:12 FILENAME: D:\MONTARI\PE2_U17.TXT

PE-2 - Granite, Cojop, 4150m

Number of grains = 15

------ GRAIN AGES ORDERED WITH INCREASING AGE ------

Grain RhoS (Ns) RhoI (Ni) Grain age (Ma) P(X2) Sum age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI-- (%) Age --95% CI--

12 0.00E+00 ( 0) 1.14E+06 ( 63) 1.9 0.1 10.6 100.0 1.9 0.1 10.6

15 0.00E+00 ( 0) 1.03E+06 ( 57) 2.2 0.1 11.8 100.0 1.0 0.0 5.5

6 0.00E+00 ( 0) 9.07E+05 ( 50) 2.5 0.1 13.5 100.0 0.7 0.0 3.9

14 0.00E+00 ( 0) 1.05E+06 ( 42) 2.9 0.1 16.1 100.0 0.6 0.0 3.1

11 1.81E+04 ( 1) 1.11E+06 ( 61) 3.3 0.1 16.7 100.0 0.7 0.0 3.6

4 0.00E+00 ( 0) 8.76E+05 ( 35) 3.5 0.1 19.5 100.0 0.7 0.0 3.2

13 0.00E+00 ( 0) 9.98E+05 ( 33) 3.7 0.1 20.8 100.0 0.6 0.0 2.9

8 0.00E+00 ( 0) 7.74E+05 ( 32) 3.9 0.1 21.5 100.0 0.5 0.0 2.6

5 0.00E+00 ( 0) 5.62E+05 ( 31) 4.0 0.1 22.2 100.0 0.5 0.0 2.4

3 3.63E+04 ( 1) 1.63E+06 ( 45) 4.5 0.1 22.9 100.0 0.8 0.1 2.8

10 2.59E+04 ( 1) 1.01E+06 ( 39) 5.1 0.1 26.6 100.0 1.1 0.2 3.2

2 3.46E+04 ( 1) 1.17E+06 ( 34) 5.9 0.1 30.8 100.0 1.4 0.4 3.5

7 3.02E+04 ( 1) 9.07E+05 ( 30) 6.7 0.1 35.2 100.0 1.6 0.5 3.7

9 0.00E+00 ( 0) 3.63E+05 ( 16) 7.8 0.3 45.5 100.0 1.6 0.5 3.6

1 2.27E+04 ( 1) 4.54E+05 ( 20) 10.0 0.2 54.8 100.0 1.8 0.7 3.9

POOL 9.28E+03( 6) 9.10E+05( 588) 100.0 1.8 0.7 3.9

MEAN URANIUM CONCENTRATION +/-2SE (ppm): 10.9, 1.0

POOLED AGE WITH 63% CONF. INTERVAL(Ma): 1.8, 1.1 -- 2.8 ( -0.7 +0.9)

95% CONF. INTERVAL(Ma): 0.7 -- 3.9 ( -1.2 +2.1)

CHI^2 PROBABILITY: 100.0%

CHI^2, DEGREES OF FREEDOM: 5.2573E-18, 0

CENTRAL AGE WITH 63% CONF. INTERVAL(Ma): 1.8, 1.2 -- 2.7 ( -0.6 +0.9)

95% CONF. INTERVAL(Ma): 0.8 -- 4.0 ( -1.0 +2.2)

AGE DISPERSION (%): 0.4

CHI^2 AGE WITH 63% CONF. INTERVAL (Ma): 1.8, 1.1 -- 2.8 ( -0.7 +0.9)

95% CONF. INTERVAL (Ma): 0.7 -- 3.9 ( -1.2 +2.1)

NUMBER AND PERCENTAGE OF GRAINS: 15, 100%

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:12 FILENAME: D:\MONTARI\PE2_U17.TXT

PE-2 - Granite, Cojop, 4150m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 15

PEAKS IN PROBABILITY DISTRIBUTION

The modes in the distribution are found by inspecting the derivatives

of the probability density as a function of Z.

Probability distribution uses grain-only standard errors.

Total probability mass integrates to N (= number of grains).

Probability density is given as grains per delta Z=0.1.

At 50 Ma, delta Z=0.1 is equivalent to a time interval of 5 m.y.

Total range for grain ages = 1.38 to 12.85 Ma

First Search: peaks with zero first derivatives.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

5.52 0.608 18.63

Second search: find minima in the second derivative of the Gaussian

probability density function.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

1.39 0.343 10.51

6.57 0.594 18.19

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:12 FILENAME: D:\MONTARI\PE2_U17.TXT

PE-2 - Granite, Cojop, 4150m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 15 Barwidth (Z units) = .1

Histogram shown by asterisks and probability distribution by circles.

PROBABILITY DENSITY (GRAINS PER DELTA Z=0.1)

0 .33 .67 1 1.33 1.67 2

AGE COUNT|.........|.........|.........|.........|.........|.........|

0.8 - 0 : o

0.9 - 0 : o

1.0 - 0 : o

1.1 - 0 : o

1.2 - 0 : o

1.4 - 1 :*********o********************

1.5 - 1 :**********o*******************

1.7 - 1 :***********o******************

1.9 - 0 : o

2.1 - 1 :************o*****************

2.3 - 0 : o

2.5 - 2 :*************o**********************************************

2.8 - 2 :**************o*********************************************

3.1 - 0 : o

3.4 - 0 : o

3.7 - 0 : o

4.1 - 1 :****************o*************

4.6 - 0 : o

5.1 - 0 : o

5.6 - 2 :*****************o******************************************

6.2 - 0 : o

6.8 - 1 :*****************o************

7.5 - 1 :****************o*************

8.3 - 1 :***************o**************

9.2 - 0 : o

10.2 - 0 : o

11.3 - 0 : o

12.4 - 1 :*********o********************

13.7 - 0 : o

15.2 - 0 : o

16.8 - 0 : o

18.5 - 0 : o

20.5 - 0 : o

22.6 - 0 : o

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 02-23-2001/12:34:14 FILENAME: D:\THESIS\MONTARI\PE3_U17.TXT

PE-3 - Quartzite, Pastourri, 4960m

>>NEW PARAMETERS--ZETA METHOD<<

EFFECTIVE TRACK DENSITY FOR FLUENCE MONITOR (tracks/cm^2): 3.331E+06

RELATIVE ERROR (%): 1.57

EFFECTIVE URANIUM CONTENT OF MONITOR (ppm): 39.81

ZETA FACTOR AND STANDARD ERROR (yr cm^2): 106.16 4.45

SIZE OF COUNTER SQUARE (cm^2): 6.890E-07

------ GRAIN AGES IN ORIGINAL ORDER ------

Grain RhoS (Ns) RhoI (Ni) Squares U+/-2s Grain Age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI--

1 0.00E+00 ( 0) 7.26E+05 ( 9) 18 9 6 14.1 0.5 89.0

2 0.00E+00 ( 0) 1.81E+05 ( 10) 80 2 1 12.7 0.4 78.4

3 6.05E+04 ( 1) 1.03E+06 ( 17) 24 12 6 11.8 0.2 66.1

4 0.00E+00 ( 0) 2.32E+05 ( 8) 50 3 2 16.0 0.6 102.8

5 0.00E+00 ( 0) 1.61E+05 ( 4) 36 2 2 33.4 1.1 262.6

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 02-23-2001/12:34:14 FILENAME: D:\THESIS\MONTARI\PE3_U17.TXT

PE-3 - Quartzite, Pastourri, 4960m

Number of grains = 5

------ GRAIN AGES ORDERED WITH INCREASING AGE ------

Grain RhoS (Ns) RhoI (Ni) Grain age (Ma) P(X2) Sum age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI-- (%) Age --95% CI--

3 6.05E+04 ( 1) 1.03E+06 ( 17) 11.8 0.2 66.1 100.0 11.8 0.2 66.1

2 0.00E+00 ( 0) 1.81E+05 ( 10) 12.7 0.4 78.4 100.0 7.5 0.2 39.6

1 0.00E+00 ( 0) 7.26E+05 ( 9) 14.1 0.5 89.0 100.0 5.6 0.1 29.1

4 0.00E+00 ( 0) 2.32E+05 ( 8) 16.0 0.6 102.8 100.0 4.6 0.1 23.6

5 0.00E+00 ( 0) 1.61E+05 ( 4) 33.4 1.1 262.6 100.0 4.2 0.1 21.5

POOL 6.98E+03( 1) 3.35E+05( 48) 100.0 4.2 0.1 21.5

MEAN URANIUM CONCENTRATION +/-2SE (ppm): 4.0, 1.2

POOLED AGE WITH 63% CONF. INTERVAL(Ma): 4.2, 0.7 -- 11.7 ( -3.5 +7.5)

95% CONF. INTERVAL(Ma): 0.1 -- 21.5 ( -4.1 +17.3)

CHI^2 PROBABILITY: 100.0%

CHI^2, DEGREES OF FREEDOM: 0.0000E+00, 0

CENTRAL AGE WITH 63% CONF. INTERVAL(Ma): 3.7, 1.3 -- 10.1 ( -2.3 +6.4)

95% CONF. INTERVAL(Ma): 0.5 -- 26.7 ( -3.2 +23.0)

AGE DISPERSION (%): 0.2

CHI^2 AGE WITH 63% CONF. INTERVAL (Ma): 4.2, 0.7 -- 11.7 ( -3.5 +7.5)

95% CONF. INTERVAL (Ma): 0.1 -- 21.5 ( -4.1 +17.3)

NUMBER AND PERCENTAGE OF GRAINS: 5, 100%

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 02-23-2001/12:34:14 FILENAME: D:\THESIS\MONTARI\PE3_U17.TXT

PE-3 - Quartzite, Pastourri, 4960m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 5

PEAKS IN PROBABILITY DISTRIBUTION

The modes in the distribution are found by inspecting the derivatives

of the probability density as a function of Z.

Probability distribution uses grain-only standard errors.

Total probability mass integrates to N (= number of grains).

Probability density is given as grains per delta Z=0.1.

At 50 Ma, delta Z=0.1 is equivalent to a time interval of 5 m.y.

Total range for grain ages = 8.41 to 19.62 Ma

First Search: peaks with zero first derivatives.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

13.30 0.242 8.26

Second search: find minima in the second derivative of the Gaussian

probability density function.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

14.31 0.241 8.22

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 02-23-2001/12:34:14 FILENAME: D:\THESIS\MONTARI\PE3_U17.TXT

PE-3 - Quartzite, Pastourri, 4960m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 5 Barwidth (Z units) = .1

Histogram shown by asterisks and probability distribution by circles.

PROBABILITY DENSITY (GRAINS PER DELTA Z=0.1)

0 .17 .33 .5 .67 .83 1

AGE COUNT|.........|.........|.........|.........|.........|.........|

5.1 - 0 : o

5.6 - 0 : o

6.2 - 0 : o

6.8 - 0 : o

7.5 - 0 : o

8.3 - 1 :***********o************************************************

9.2 - 1 :************o***********************************************

10.2 - 1 :*************o**********************************************

11.3 - 0 : o

12.4 - 0 : o

13.7 - 0 : o

15.2 - 1 :*************o**********************************************

16.8 - 0 : o

18.5 - 0 : o

20.5 - 1 :***********o************************************************

22.6 - 0 : o

25.0 - 0 : o

27.6 - 0 : o

30.5 - 0 : o

33.7 - 0 : o

37.3-0 o

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:40 FILENAME: D:\MONTARI\PE4_U17.TXT

PE-4 - Granite, Ishinca, 4930m

>>NEW PARAMETERS--ZETA METHOD<<

EFFECTIVE TRACK DENSITY FOR FLUENCE MONITOR (tracks/cm^2): 3.350E+06

RELATIVE ERROR (%): 1.61

EFFECTIVE URANIUM CONTENT OF MONITOR (ppm): 39.81

ZETA FACTOR AND STANDARD ERROR (yr cm^2): 106.16 4.45

SIZE OF COUNTER SQUARE (cm^2): 6.890E-07

------ GRAIN AGES IN ORIGINAL ORDER ------

Grain RhoS (Ns) RhoI (Ni) Squares U+/-2s Grain Age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI--

1 0.00E+00 ( 0) 2.70E+06 ( 67) 36 32 8 1.8 0.1 10.1

2 6.05E+04 ( 2) 4.11E+06 ( 136) 48 49 9 2.8 0.3 9.6

3 3.02E+04 ( 1) 1.45E+06 ( 48) 48 17 5 4.2 0.1 21.6

4 4.84E+04 ( 2) 2.90E+06 ( 120) 60 34 6 3.2 0.4 10.9

5 0.00E+00 ( 0) 1.28E+06 ( 53) 60 15 4 2.3 0.1 12.8

6 1.81E+04 ( 1) 9.25E+05 ( 51) 80 11 3 4.0 0.1 20.3

7 6.80E+04 ( 3) 1.54E+06 ( 68) 64 18 4 8.2 1.6 23.9

8 7.26E+04 ( 2) 3.41E+06 ( 94) 40 41 8 4.1 0.5 14.0

9 4.03E+04 ( 1) 2.30E+06 ( 57) 36 27 7 3.6 0.1 18.1

10 4.03E+04 ( 1) 2.42E+06 ( 60) 36 29 7 3.4 0.1 17.1

11 4.54E+04 ( 2) 3.24E+06 ( 143) 64 39 7 2.7 0.3 9.2

12 6.80E+04 ( 3) 4.42E+06 ( 195) 64 53 8 2.9 0.6 8.1

13 5.44E+04 ( 3) 4.01E+06 ( 221) 80 48 7 2.5 0.5 7.2

14 0.00E+00 ( 0) 1.95E+06 ( 86) 64 23 5 1.4 0.1 7.8

15 2.27E+04 ( 1) 1.52E+06 ( 67) 64 18 4 3.0 0.1 15.3

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:40 FILENAME: D:\MONTARI\PE4_U17.TXT

PE-4 - Granite, Ishinca, 4930m

Number of grains = 15

------ GRAIN AGES ORDERED WITH INCREASING AGE ------

Grain RhoS (Ns) RhoI (Ni) Grain age (Ma) P(X2) Sum age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI-- (%) Age --95% CI--

14 0.00E+00 ( 0) 1.95E+06 ( 86) 1.4 0.1 7.8 100.0 1.4 0.1 7.8

1 0.00E+00 ( 0) 2.70E+06 ( 67) 1.8 0.1 10.1 100.0 0.8 0.0 4.3

5 0.00E+00 ( 0) 1.28E+06 ( 53) 2.3 0.1 12.8 100.0 0.6 0.0 3.2

13 5.44E+04 ( 3) 4.01E+06 ( 221) 2.5 0.5 7.2 100.0 1.3 0.3 3.7

11 4.54E+04 ( 2) 3.24E+06 ( 143) 2.7 0.3 9.2 100.0 1.6 0.5 3.7

2 6.05E+04 ( 2) 4.11E+06 ( 136) 2.8 0.3 9.6 100.0 1.8 0.7 3.7

12 6.80E+04 ( 3) 4.42E+06 ( 195) 2.9 0.6 8.1 100.0 2.0 0.9 3.7

15 2.27E+04 ( 1) 1.52E+06 ( 67) 3.0 0.1 15.3 100.0 2.1 1.0 3.6

4 4.84E+04 ( 2) 2.90E+06 ( 120) 3.2 0.4 10.9 23.5 2.2 1.1 3.7

10 4.03E+04 ( 1) 2.42E+06 ( 60) 3.4 0.1 17.1 22.5 2.2 1.2 3.7

9 4.03E+04 ( 1) 2.30E+06 ( 57) 3.6 0.1 18.1 21.4 2.2 1.2 3.7

6 1.81E+04 ( 1) 9.25E+05 ( 51) 4.0 0.1 20.3 20.0 2.3 1.3 3.7

8 7.26E+04 ( 2) 3.41E+06 ( 94) 4.1 0.5 14.0 36.7 2.4 1.4 3.8

3 3.02E+04 ( 1) 1.45E+06 ( 48) 4.2 0.1 21.6 34.6 2.4 1.4 3.8

7 6.80E+04 ( 3) 1.54E+06 ( 68) 8.2 1.6 23.9 19.9 2.7 1.7 4.1

POOL 3.78E+04( 22) 2.52E+06( 1466) 19.9 2.7 1.7 4.1

MEAN URANIUM CONCENTRATION +/-2SE (ppm): 30.0, 1.8

POOLED AGE WITH 63% CONF. INTERVAL(Ma): 2.7, 2.1 -- 3.3 ( -0.5 +0.6)

95% CONF. INTERVAL(Ma): 1.7 -- 4.1 ( -1.0 +1.4)

CHI^2 PROBABILITY: 19.9%

CHI^2, DEGREES OF FREEDOM: 3.2334E+00, 2

CENTRAL AGE WITH 63% CONF. INTERVAL(Ma): 2.7, 2.1 -- 3.3 ( -0.5 +0.7)

95% CONF. INTERVAL(Ma): 1.7 -- 4.1 ( -0.9 +1.4)

AGE DISPERSION (%): 0.1

CHI^2 AGE WITH 63% CONF. INTERVAL (Ma): 2.7, 2.1 -- 3.3 ( -0.5 +0.6)

95% CONF. INTERVAL (Ma): 1.7 -- 4.1 ( -1.0 +1.4)

NUMBER AND PERCENTAGE OF GRAINS: 15, 100%

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:40 FILENAME: D:\MONTARI\PE4_U17.TXT

PE-4 - Granite, Ishinca, 4930m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 15

PEAKS IN PROBABILITY DISTRIBUTION

The modes in the distribution are found by inspecting the derivatives

of the probability density as a function of Z.

Probability distribution uses grain-only standard errors.

Total probability mass integrates to N (= number of grains).

Probability density is given as grains per delta Z=0.1.

At 50 Ma, delta Z=0.1 is equivalent to a time interval of 5 m.y.

Total range for grain ages = 1.03 to 9.08 Ma

First Search: peaks with zero first derivatives.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

3.54 1.003 22.48

Second search: find minima in the second derivative of the Gaussian

probability density function.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

0.72 0.109 2.44

3.31 0.994 22.27

9.15 0.335 7.50

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:40 FILENAME: D:\MONTARI\PE4_U17.TXT

PE-4 - Granite, Ishinca, 4930m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 15 Barwidth (Z units) = .1

Histogram shown by asterisks and probability distribution by circles.

PROBABILITY DENSITY (GRAINS PER DELTA Z=0.1)

0 .5 1 1.5 2 2.5 3

AGE COUNT|.........|.........|.........|.........|.........|.........|

0.6 - 0 : o

0.7 - 0 : o

0.8 - 0 : o

0.8 - 0 : o

0.9 - 0 : o

1.0 - 1 :**o*****************

1.1 - 0 : o

1.2 - 0 : o

1.4 - 1 :***o****************

1.5 - 0 : o

1.7 - 1 :*****o**************

1.9 - 0 : o

2.1 - 0 : o

2.3 - 0 : o

2.5 - 0 : o

2.8 - 1 :*****************o**

3.1 - 2 :******************o*********************

3.4 - 1 :*******************o

3.7 - 1 :*******************o

4.1 - 1 :******************o*

4.6 - 3 :*****************o******************************************

5.1 - 1 :***************o****

5.6 - 1 :*************o******

6.2 - 0 : o

6.8 - 0 : o

7.5 - 0 : o

8.3 - 0 : o

9.2 - 1 :******o*************

10.2 - 0 : o

11.3 - 0 : o

12.4 - 0 : o

13.7 - 0 : o

15.2 - 0 :o

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:59 FILENAME: D:\MONTARI\PE5_U17.TXT

PE-5 - Granite, Llanganuco, 3860m

>>NEW PARAMETERS--ZETA METHOD<<

EFFECTIVE TRACK DENSITY FOR FLUENCE MONITOR (tracks/cm^2): 3.369E+06

RELATIVE ERROR (%): 1.65

EFFECTIVE URANIUM CONTENT OF MONITOR (ppm): 39.81

ZETA FACTOR AND STANDARD ERROR (yr cm^2): 106.16 4.45

SIZE OF COUNTER SQUARE (cm^2): 6.890E-07

------ GRAIN AGES IN ORIGINAL ORDER ------

Grain RhoS (Ns) RhoI (Ni) Squares U+/-2s Grain Age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI--

1 0.00E+00 ( 0) 2.81E+06 ( 155) 80 33 5 0.8 0.0 4.3

2 9.68E+04 ( 2) 4.50E+06 ( 93) 30 53 11 4.1 0.5 14.3

3 5.18E+04 ( 2) 4.15E+06 ( 160) 56 49 8 2.4 0.3 8.2

4 1.59E+05 ( 7) 7.12E+06 ( 314) 64 84 10 4.1 1.6 8.3

5 4.54E+04 ( 2) 2.93E+06 ( 129) 64 35 6 3.0 0.3 10.2

6 5.44E+04 ( 3) 2.65E+06 ( 146) 80 31 5 3.9 0.7 11.0

7 0.00E+00 ( 0) 8.06E+05 ( 40) 72 10 3 3.1 0.1 17.3

8 4.68E+04 ( 2) 2.41E+06 ( 103) 62 28 6 3.7 0.4 12.9

9 2.27E+04 ( 1) 1.90E+06 ( 84) 64 23 5 2.4 0.1 12.2

10 8.06E+04 ( 2) 3.10E+06 ( 77) 36 37 8 5.0 0.6 17.4

11 3.63E+04 ( 2) 2.49E+06 ( 137) 80 29 5 2.8 0.3 9.6

12 3.02E+04 ( 1) 1.66E+06 ( 55) 48 20 5 3.7 0.1 18.9

13 5.44E+04 ( 3) 2.00E+06 ( 110) 80 24 5 5.1 1.0 14.6

14 5.44E+04 ( 3) 3.07E+06 ( 169) 80 36 6 3.3 0.6 9.4

15 2.27E+04 ( 1) 2.77E+06 ( 122) 64 33 6 1.7 0.0 8.3

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:59 FILENAME: D:\MONTARI\PE5_U17.TXT

PE-5 - Granite, Llanganuco, 3860m

Number of grains = 15

------ GRAIN AGES ORDERED WITH INCREASING AGE ------

Grain RhoS (Ns) RhoI (Ni) Grain age (Ma) P(X2) Sum age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI-- (%) Age --95% CI--

1 0.00E+00 ( 0) 2.81E+06 ( 155) 0.8 0.0 4.3 100.0 0.8 0.0 4.3

15 2.27E+04 ( 1) 2.77E+06 ( 122) 1.7 0.0 8.3 100.0 0.7 0.0 3.6

3 5.18E+04 ( 2) 4.15E+06 ( 160) 2.4 0.3 8.2 100.0 1.3 0.3 3.6

9 2.27E+04 ( 1) 1.90E+06 ( 84) 2.4 0.1 12.2 100.0 1.4 0.4 3.5

11 3.63E+04 ( 2) 2.49E+06 ( 137) 2.8 0.3 9.6 100.0 1.7 0.6 3.6

5 4.54E+04 ( 2) 2.93E+06 ( 129) 3.0 0.3 10.2 100.0 1.9 0.8 3.6

7 0.00E+00 ( 0) 8.06E+05 ( 40) 3.1 0.1 17.3 100.0 1.8 0.7 3.4

14 5.44E+04 ( 3) 3.07E+06 ( 169) 3.3 0.6 9.4 29.2 2.0 1.0 3.6

12 3.02E+04 ( 1) 1.66E+06 ( 55) 3.7 0.1 18.9 26.3 2.1 1.1 3.6

8 4.68E+04 ( 2) 2.41E+06 ( 103) 3.7 0.4 12.9 20.7 2.2 1.2 3.7

6 5.44E+04 ( 3) 2.65E+06 ( 146) 3.9 0.7 11.0 28.1 2.4 1.4 3.8

4 1.59E+05 ( 7) 7.12E+06 ( 314) 4.1 1.6 8.3 33.9 2.7 1.7 4.0

2 9.68E+04 ( 2) 4.50E+06 ( 93) 4.1 0.5 14.3 31.7 2.7 1.8 4.0

10 8.06E+04 ( 2) 3.10E+06 ( 77) 5.0 0.6 17.4 27.4 2.8 1.9 4.1

13 5.44E+04 ( 3) 2.00E+06 ( 110) 5.1 1.0 14.6 22.0 2.9 2.0 4.2

POOL 4.69E+04( 31) 2.86E+06( 1894) 22.0 2.9 2.0 4.2

MEAN URANIUM CONCENTRATION +/-2SE (ppm): 33.8, 1.9

POOLED AGE WITH 63% CONF. INTERVAL(Ma): 2.9, 2.4 -- 3.5 ( -0.5 +0.6)

95% CONF. INTERVAL(Ma): 2.0 -- 4.2 ( -1.0 +1.2)

CHI^2 PROBABILITY: 22.0%

CHI^2, DEGREES OF FREEDOM: 4.4142E+00, 3

CENTRAL AGE WITH 63% CONF. INTERVAL(Ma): 2.9, 2.4 -- 3.5 ( -0.5 +0.6)

95% CONF. INTERVAL(Ma): 2.0 -- 4.2 ( -0.9 +1.3)

AGE DISPERSION (%): 0.2

CHI^2 AGE WITH 63% CONF. INTERVAL (Ma): 2.9, 2.4 -- 3.5 ( -0.5 +0.6)

95% CONF. INTERVAL (Ma): 2.0 -- 4.2 ( -1.0 +1.2)

NUMBER AND PERCENTAGE OF GRAINS: 15, 100%

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:59 FILENAME: D:\MONTARI\PE5_U17.TXT

PE-5 - Granite, Llanganuco, 3860m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 15

PEAKS IN PROBABILITY DISTRIBUTION

The modes in the distribution are found by inspecting the derivatives

of the probability density as a function of Z.

Probability distribution uses grain-only standard errors.

Total probability mass integrates to N (= number of grains).

Probability density is given as grains per delta Z=0.1.

At 50 Ma, delta Z=0.1 is equivalent to a time interval of 5 m.y.

Total range for grain ages = 0.57 to 5.77 Ma

First Search: peaks with zero first derivatives.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

4.12 1.225 24.48

Second search: find minima in the second derivative of the Gaussian

probability density function.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

0.40 0.050 0.99

4.21 1.222 24.44

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:51:59 FILENAME: D:\MONTARI\PE5_U17.TXT

PE-5 - Granite, Llanganuco, 3860m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 15 Barwidth (Z units) = .1

Histogram shown by asterisks and probability distribution by circles.

PROBABILITY DENSITY (GRAINS PER DELTA Z=0.1)

0 .5 1 1.5 2 2.5 3

AGE COUNT|.........|.........|.........|.........|.........|.........|

0.3 - 0 :o

0.4 - 0 :o

0.4 - 0 :o

0.5 - 0 :o

0.5 - 0 :o

0.6 - 1 :o*******************

0.6 - 0 :o

0.7 - 0 :o

0.8 - 0 : o

0.8 - 0 : o

0.9 - 0 : o

1.0 - 0 : o

1.1 - 0 : o

1.2 - 0 : o

1.4 - 0 : o

1.5 - 0 : o

1.7 - 0 : o

1.9 - 0 : o

2.1 - 0 : o

2.3 - 2 :**********o*****************************

2.5 - 0 : o

2.8 - 1 :***************o****

3.1 - 1 :******************o*

3.4 - 2 :*********************o******************

3.7 - 1 :******************** o

4.1 - 3 :***********************o************************************

4.6 - 1 :******************** o

5.1 - 1 :********************o

5.6 - 2 :*****************o**********************

6.2 - 0 : o

6.8 - 0 : o

7.5 - 0 : o

8.3 - 0 : o

9.2 - 0 : o

10.2 - 0 : o

11.3 - 0 : o

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:52:15 FILENAME: D:\MONTARI\PE6_U17.TXT

PE-6 - Granite, Llanganuco, 3850m

>>NEW PARAMETERS--ZETA METHOD<<

EFFECTIVE TRACK DENSITY FOR FLUENCE MONITOR (tracks/cm^2): 3.387E+06

RELATIVE ERROR (%): 1.71

EFFECTIVE URANIUM CONTENT OF MONITOR (ppm): 39.81

ZETA FACTOR AND STANDARD ERROR (yr cm^2): 106.16 4.45

SIZE OF COUNTER SQUARE (cm^2): 6.890E-07

------ GRAIN AGES IN ORIGINAL ORDER ------

Grain RhoS (Ns) RhoI (Ni) Squares U+/-2s Grain Age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI--

1 3.02E+04 ( 1) 1.72E+06 ( 57) 48 20 5 3.6 0.1 18.3

2 5.44E+04 ( 3) 2.18E+06 ( 120) 80 26 5 4.7 0.9 13.5

3 1.81E+04 ( 1) 1.47E+06 ( 81) 80 17 4 2.5 0.1 12.7

4 9.68E+04 ( 4) 5.32E+06 ( 220) 60 63 9 3.4 0.9 8.5

5 2.42E+04 ( 1) 1.89E+06 ( 78) 60 22 5 2.6 0.1 13.2

6 6.80E+04 ( 3) 2.56E+06 ( 113) 64 30 6 5.0 1.0 14.3

7 2.42E+04 ( 1) 1.94E+06 ( 80) 60 23 5 2.6 0.1 12.9

8 0.00E+00 ( 0) 8.95E+05 ( 37) 60 11 3 3.4 0.1 18.8

9 0.00E+00 ( 0) 1.45E+06 ( 64) 64 17 4 2.0 0.1 10.7

10 3.02E+04 ( 1) 1.97E+06 ( 65) 48 23 6 3.2 0.1 16.0

11 2.42E+04 ( 1) 2.98E+06 ( 123) 60 35 6 1.7 0.0 8.3

12 7.26E+04 ( 2) 3.81E+06 ( 105) 40 45 9 3.7 0.4 12.7

13 6.80E+04 ( 3) 3.17E+06 ( 140) 64 37 6 4.1 0.8 11.5

14 0.00E+00 ( 0) 9.37E+05 ( 31) 48 11 4 4.1 0.1 22.7

15 3.02E+04 ( 1) 7.86E+05 ( 26) 48 9 4 7.9 0.2 42.0

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:52:15 FILENAME: D:\MONTARI\PE6_U17.TXT

PE-6 - Granite, Llanganuco, 3850m

Number of grains = 15

------ GRAIN AGES ORDERED WITH INCREASING AGE ------

Grain RhoS (Ns) RhoI (Ni) Grain age (Ma) P(X2) Sum age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI-- (%) Age --95% CI--

11 2.42E+04 ( 1) 2.98E+06 ( 123) 1.7 0.0 8.3 100.0 1.7 0.0 8.3

9 0.00E+00 ( 0) 1.45E+06 ( 64) 2.0 0.1 10.7 100.0 1.1 0.0 5.4

3 1.81E+04 ( 1) 1.47E+06 ( 81) 2.5 0.1 12.7 100.0 1.4 0.2 4.9

7 2.42E+04 ( 1) 1.94E+06 ( 80) 2.6 0.1 12.9 100.0 1.6 0.3 4.6

5 2.42E+04 ( 1) 1.89E+06 ( 78) 2.6 0.1 13.2 100.0 1.8 0.5 4.4

10 3.02E+04 ( 1) 1.97E+06 ( 65) 3.2 0.1 16.0 100.0 1.9 0.6 4.3

4 9.68E+04 ( 4) 5.32E+06 ( 220) 3.4 0.9 8.5 100.0 2.3 1.0 4.3

8 0.00E+00 ( 0) 8.95E+05 ( 37) 3.4 0.1 18.8 100.0 2.2 1.0 4.1

1 3.02E+04 ( 1) 1.72E+06 ( 57) 3.6 0.1 18.3 100.0 2.3 1.1 4.1

12 7.26E+04 ( 2) 3.81E+06 ( 105) 3.7 0.4 12.7 35.2 2.4 1.2 4.2

13 6.80E+04 ( 3) 3.17E+06 ( 140) 4.1 0.8 11.5 27.6 2.6 1.4 4.3

14 0.00E+00 ( 0) 9.37E+05 ( 31) 4.1 0.1 22.7 31.6 2.5 1.4 4.1

2 5.44E+04 ( 3) 2.18E+06 ( 120) 4.7 0.9 13.5 50.7 2.7 1.6 4.3

6 6.80E+04 ( 3) 2.56E+06 ( 113) 5.0 1.0 14.3 41.8 2.9 1.8 4.4

15 3.02E+04 ( 1) 7.86E+05 ( 26) 7.9 0.2 42.0 37.6 3.0 1.8 4.5

POOL 3.61E+04( 22) 2.20E+06( 1340) 37.6 3.0 1.8 4.5

MEAN URANIUM CONCENTRATION +/-2SE (ppm): 25.9, 1.7

POOLED AGE WITH 63% CONF. INTERVAL(Ma): 3.0, 2.4 -- 3.7 ( -0.6 +0.7)

95% CONF. INTERVAL(Ma): 1.8 -- 4.5 ( -1.1 +1.5)

CHI^2 PROBABILITY: 37.6%

CHI^2, DEGREES OF FREEDOM: 1.9559E+00, 2

CENTRAL AGE WITH 63% CONF. INTERVAL(Ma): 3.0, 2.4 -- 3.7 ( -0.6 +0.7)

95% CONF. INTERVAL(Ma): 1.9 -- 4.5 ( -1.0 +1.6)

AGE DISPERSION (%): 0.1

CHI^2 AGE WITH 63% CONF. INTERVAL (Ma): 3.0, 2.4 -- 3.7 ( -0.6 +0.7)

95% CONF. INTERVAL (Ma): 1.8 -- 4.5 ( -1.1 +1.5)

NUMBER AND PERCENTAGE OF GRAINS: 15, 100%

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:52:15 FILENAME: D:\MONTARI\PE6_U17.TXT

PE-6 - Granite, Llanganuco, 3850m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 15

PEAKS IN PROBABILITY DISTRIBUTION

The modes in the distribution are found by inspecting the derivatives

of the probability density as a function of Z.

Probability distribution uses grain-only standard errors.

Total probability mass integrates to N (= number of grains).

Probability density is given as grains per delta Z=0.1.

At 50 Ma, delta Z=0.1 is equivalent to a time interval of 5 m.y.

Total range for grain ages = 1.39 to 10.17 Ma

First Search: peaks with zero first derivatives.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

4.22 1.061 24.15

Second search: find minima in the second derivative of the Gaussian

probability density function.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

4.31 1.059 24.12

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:52:15 FILENAME: D:\MONTARI\PE6_U17.TXT

PE-6 - Granite, Llanganuco, 3850m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 15 Barwidth (Z units) = .1

Histogram shown by asterisks and probability distribution by circles.

PROBABILITY DENSITY (GRAINS PER DELTA Z=0.1)

0 .5 1 1.5 2 2.5 3

AGE COUNT|.........|.........|.........|.........|.........|.........|

0.8 - 0 : o

0.9 - 0 : o

1.0 - 0 : o

1.1 - 0 : o

1.2 - 0 : o

1.4 - 1 :****o***************

1.5 - 0 : o

1.7 - 0 : o

1.9 - 0 : o

2.1 - 0 : o

2.3 - 1 :**********o*********

2.5 - 1 :************o*******

2.8 - 1 :**************o*****

3.1 - 0 : o

3.4 - 3 :******************o*****************************************

3.7 - 1 :********************o

4.1 - 2 :********************o*******************

4.6 - 2 :********************o*******************

5.1 - 1 :*******************o

5.6 - 1 :*****************o**

6.2 - 0 : o

6.8 - 0 : o

7.5 - 0 : o

8.3 - 0 : o

9.2 - 0 : o

10.2 - 1 :***o****************

11.3 - 0 : o

12.4 - 0 : o

13.7 - 0 : o

15.2 - 0 : o

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:52:37 FILENAME: D:\MONTARI\PE7_U17.TXT

PE-7 - Myl. Granite, Llanganuco, 3480m

>>NEW PARAMETERS--ZETA METHOD<<

EFFECTIVE TRACK DENSITY FOR FLUENCE MONITOR (tracks/cm^2): 3.406E+06

RELATIVE ERROR (%): 1.78

EFFECTIVE URANIUM CONTENT OF MONITOR (ppm): 39.81

ZETA FACTOR AND STANDARD ERROR (yr cm^2): 106.16 4.45

SIZE OF COUNTER SQUARE (cm^2): 6.890E-07

------ GRAIN AGES IN ORIGINAL ORDER ------

Grain RhoS (Ns) RhoI (Ni) Squares U+/-2s Grain Age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI--

1 2.27E+04 ( 1) 6.35E+05 ( 28) 64 7 3 7.4 0.2 39.0

2 0.00E+00 ( 0) 1.09E+06 ( 36) 48 13 4 3.5 0.1 19.5

3 0.00E+00 ( 0) 1.22E+06 ( 54) 64 14 4 2.3 0.1 12.8

4 1.81E+04 ( 1) 9.43E+05 ( 52) 80 11 3 4.0 0.1 20.2

5 0.00E+00 ( 0) 3.63E+05 ( 9) 36 4 3 14.5 0.5 91.0

6 1.81E+04 ( 1) 6.53E+05 ( 36) 80 8 3 5.7 0.1 29.8

7 1.81E+04 ( 1) 8.53E+05 ( 47) 80 10 3 4.4 0.1 22.5

8 2.64E+04 ( 1) 7.39E+05 ( 28) 55 9 3 7.4 0.2 39.0

9 0.00E+00 ( 0) 4.54E+05 ( 20) 64 5 2 6.4 0.2 36.5

10 0.00E+00 ( 0) 3.49E+05 ( 13) 54 4 2 9.9 0.4 59.1

11 0.00E+00 ( 0) 8.53E+05 ( 47) 80 10 3 2.7 0.1 14.8

12 0.00E+00 ( 0) 3.39E+05 ( 14) 60 4 2 9.2 0.3 54.3

13 0.00E+00 ( 0) 8.78E+05 ( 23) 38 10 4 5.5 0.2 31.4

14 1.81E+04 ( 1) 8.53E+05 ( 47) 80 10 3 4.4 0.1 22.5

15 0.00E+00 ( 0) 9.30E+05 ( 25) 39 11 4 5.1 0.2 28.7

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:52:37 FILENAME: D:\MONTARI\PE7_U17.TXT

PE-7 - Myl. Granite, Llanganuco, 3480m

Number of grains = 15

------ GRAIN AGES ORDERED WITH INCREASING AGE ------

Grain RhoS (Ns) RhoI (Ni) Grain age (Ma) P(X2) Sum age (Ma)

no. (cm^-2) (cm^-2) Age --95% CI-- (%) Age --95% CI--

3 0.00E+00 ( 0) 1.22E+06 ( 54) 2.3 0.1 12.8 100.0 2.3 0.1 12.8

11 0.00E+00 ( 0) 8.53E+05 ( 47) 2.7 0.1 14.8 100.0 1.2 0.0 6.7

2 0.00E+00 ( 0) 1.09E+06 ( 36) 3.5 0.1 19.5 100.0 0.9 0.0 4.9

4 1.81E+04 ( 1) 9.43E+05 ( 52) 4.0 0.1 20.2 100.0 1.1 0.0 5.4

14 1.81E+04 ( 1) 8.53E+05 ( 47) 4.4 0.1 22.5 100.0 1.7 0.2 5.6

7 1.81E+04 ( 1) 8.53E+05 ( 47) 4.4 0.1 22.5 100.0 2.0 0.4 5.7

15 0.00E+00 ( 0) 9.30E+05 ( 25) 5.1 0.2 28.7 100.0 1.9 0.4 5.2

13 0.00E+00 ( 0) 8.78E+05 ( 23) 5.5 0.2 31.4 100.0 1.7 0.3 4.8

6 1.81E+04 ( 1) 6.53E+05 ( 36) 5.7 0.1 29.8 100.0 2.0 0.5 5.1

9 0.00E+00 ( 0) 4.54E+05 ( 20) 6.4 0.2 36.5 100.0 1.9 0.5 4.8

1 2.27E+04 ( 1) 6.35E+05 ( 28) 7.4 0.2 39.0 100.0 2.2 0.7 5.1

8 2.64E+04 ( 1) 7.39E+05 ( 28) 7.4 0.2 39.0 100.0 2.5 0.9 5.4

12 0.00E+00 ( 0) 3.39E+05 ( 14) 9.2 0.3 54.3 100.0 2.4 0.9 5.2

10 0.00E+00 ( 0) 3.49E+05 ( 13) 9.9 0.4 59.1 100.0 2.4 0.8 5.1

5 0.00E+00 ( 0) 3.63E+05 ( 9) 14.5 0.5 91.0 100.0 2.3 0.8 5.0

POOL 9.44E+03( 6) 7.54E+05( 479) 100.0 2.3 0.8 5.0

MEAN URANIUM CONCENTRATION +/-2SE (ppm): 8.8, 0.9

POOLED AGE WITH 63% CONF. INTERVAL(Ma): 2.3, 1.4 -- 3.5 ( -0.9 +1.2)

95% CONF. INTERVAL(Ma): 0.8 -- 5.0 ( -1.5 +2.6)

CHI^2 PROBABILITY: 100.0%

CHI^2, DEGREES OF FREEDOM: 2.3419E-18, 0

CENTRAL AGE WITH 63% CONF. INTERVAL(Ma): 2.3, 1.5 -- 3.4 ( -0.8 +1.2)

95% CONF. INTERVAL(Ma): 1.0 -- 5.1 ( -1.3 +2.8)

AGE DISPERSION (%): 0.2

CHI^2 AGE WITH 63% CONF. INTERVAL (Ma): 2.3, 1.4 -- 3.5 ( -0.9 +1.2)

95% CONF. INTERVAL (Ma): 0.8 -- 5.0 ( -1.5 +2.6)

NUMBER AND PERCENTAGE OF GRAINS: 15, 100%

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:52:37 FILENAME: D:\MONTARI\PE7_U17.TXT

PE-7 - Myl. Granite, Llanganuco, 3480m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 15

PEAKS IN PROBABILITY DISTRIBUTION

The modes in the distribution are found by inspecting the derivatives

of the probability density as a function of Z.

Probability distribution uses grain-only standard errors.

Total probability mass integrates to N (= number of grains).

Probability density is given as grains per delta Z=0.1.

At 50 Ma, delta Z=0.1 is equivalent to a time interval of 5 m.y.

Total range for grain ages = 1.66 to 9.51 Ma

First Search: peaks with zero first derivatives.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

6.20 0.730 22.46

Second search: find minima in the second derivative of the Gaussian

probability density function.

AGE PROBABILTY DENSITY AT PEAK EST. N

(Ma) (grains/DZ=0.1) (grains)

1.14 0.179 5.50

6.58 0.727 22.38

===================ZetaAge Program v. 4.7 (Brandon 6/24/97)===================

DATE/TIME: 01-31-2001/13:52:37 FILENAME: D:\MONTARI\PE7_U17.TXT

PE-7 - Myl. Granite, Llanganuco, 3480m

Kernel factor = .6 (Ratio of kernel window size to standard error)

Number of grains = 15 Barwidth (Z units) = .1

Histogram shown by asterisks and probability distribution by circles.

PROBABILITY DENSITY (GRAINS PER DELTA Z=0.1)

0 .5 1 1.5 2 2.5 3

AGE COUNT|.........|.........|.........|.........|.........|.........|

1.0 - 0 : o

1.1 - 0 : o

1.2 - 0 : o

1.4 - 0 : o

1.5 - 0 : o

1.7 - 1 :****o***************

1.9 - 1 :*****o**************

2.1 - 0 : o

2.3 - 0 : o

2.5 - 1 :*******o************

2.8 - 0 : o

3.1 - 0 : o

3.4 - 1 :**********o*********

3.7 - 1 :***********o********

4.1 - 0 : o

4.6 - 1 :************o*******

5.1 - 1 :*************o******

5.6 - 2 :*************o**************************

6.2 - 1 :**************o*****

6.8 - 1 :*************o******

7.5 - 1 :*************o******

8.3 - 0 : o

9.2 - 3 :***********o************************************************

10.2 - 0 : o

11.3 - 0 : o

12.4 - 0 : o

13.7 - 0 : o

15.2 - 0 : o

16.8 - 0 : o

18.5 - 0 : o

20.5 - 0 : o

22.6 - 0 : o

25.0 - 0 : o