This sample belongs to: Gonzalo Ronda

Sample Details
Sample Name: RB2_AFT
IGSN: IEGMR000M
Laboratory: Dalhousie Fission Track
Analyst: Gonzalo Ronda
Mineral: Apatite
Dosimeter Glass: CN5
Dosimeter Glass U ppm:
Irradiation:
Count Date:
Locality:
Rock Type:
Rock Age:
Acquisition system:
Magnification:
Radiation Facility:
Total Thermal Neutron Fluence:
Position in Irradiation Canister (#):
Area of Graticule Square: 0,000000898
No. of Crystals Counted: 40
Zeta Factor: 343.05
Zeta Factor Error (1s): 26.08
Rho d: 1121000
Rho d (% Relative Error):
N d: 5414
Geometry factor (for EDM and Zeta ICPMS methods):
Etchant:
Etching Conditions:
Method - U:
ICPMS Model:
Laser Model and Type:
Instrumental Method References:
U Calibration Standard:
U ppm of Standard:
Specific Denisty of Dated Mineral:
Avagadro Constant:
Registration Factor (Rsp):
Etching Correction Factor (k):
ICPMS Zeta Standard:
Standard Age:
Standard Age Error:
Primary Zeta:
1 sigma Uncertainty:
Session (Modified) Zeta:
1 sigma (Modified) Uncertainty:
Comment:
Chemistry Method:
Chemistry Laboratory:
Chemistry Comment:
238U Decay Constant: 1.55125E-10
238U Decay Constant Error:
235U Decay Constant: 9.84850E-10
235U Decay Constant Error:
232Th Decay Constant : 4.94750E-11
232Th Decay Constant Error:
Spontaneous Fission Decay Constant: 8.46E-17
Spontaneous Fission Decay Constant Error:
238U/235U: 137.88
Fission Decay Constant Reference: Spadavecchia , A. & Hahn, B. (1967). Die Rotationskammer und einige Anwendungen. Helvetica Physica Acta, 40, p. 1063-1079
Decay Constant References: Steiger, R.H. and Jager, E., 1977, Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology. Earth and Planetary Science Letters, v. 36, no. 3, p. 359-362
Decay Constant Comment:

Sample Metadata
Sample ID: RB2
Sample Description:
GeoObject Type: Grab
Geoobject Classification:
Collection Method: Manual
Material: Rock
Latitude: -47.79209
Longitude: -72.01934
Sample Comment:
Collector: Gonzalo Ronda
Material Classification:
Primary Location Name:
Primary Location Type:
Location Description:
Locality:
Locality Description:
Country:
Provice:
County:
City Or Township:
Platform:
Platform ID:
Original Archival Institution:
Original Archival Contact:
Most Recent Archival Institution: Universidad de Buenos Aires
Most Recent Archival Contact: gonzaloronda@gmail.com

Age(s)
Analysis Purpose Preferred Age Type Pooled Age Pooled Age Error +95% Pooled Age Error -95% Chi-squared Value Degrees of Freedom P (Chi-suqared) Mean Crystal Age Mean Crystal Age Error +95% Mean Crystal Age Error -95% Central Age Central Age Error +95% Central Age Error -95% Central Age - Age Dispersion (%) Binomial Age Binomial Age Error +95% Binomial Age Error -95% Other Age Other Age Error Preferred Age Explanation Age Reference
Cooling Central 0 57.9 5.6 5.6

Apatite Age
Grain ID N s N i Na Dpar Dper Rmr0 Rho s Rho i Rho s / Rho i Area (Ω) # of Etch Figures 238U/43Ca error (1σ) U ppm U error (1s) Age (Ma) Age error +1s Age error -1s CaO P2O5 F Cl SrO BaO Si02 Na2O CeO2 FeO Total
1 29 105 100
2 13 82 100
3 8 36 100
4 35 141 100
5 12 39 56
6 30 91 80
7 22 81 100
8 11 80 100
9 29 73 100
10 14 54 60
11 36 104 100
12 64 157 100
13 35 118 90
14 12 95 100
15 37 98 100
16 15 109 100
17 13 42 49
18 21 57 100
19 16 61 80
20 26 97 100
21 7 98 100
22 42 129 100
23 34 166 100
24 19 71 80
25 18 39 100
26 14 61 72.130808180019
27 21 34 43.483269180579
28 10 31 41.646888475487
29 20 45 47.467658831628
30 17 38 57.061356818231
31 18 38 41.613499735394
32 16 47 55.347401493478
33 15 50 55.703548054466
34 8 15 57.094745558324
35 10 33 79.142443599462
36 34 116 48.803208435331
37 28 66 85.074509755912
38 29 74 81.001083464616
39 18 43 75.057887728136
40 10 15 27.812820497125

Grain Lengths
Grain ID Length Angle to C axis Dpar Tint or Tincle Depth Width Probability of this being a confined length Number of times Intersected
filename:26085.xml
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