This sample belongs to: Mélanie Noury
Sample Name: SM15-21_aft
IGSN: IEMNX0005
Laboratory: ISTerre fission-track lab (Geo-Thermochronology Platform, Univ. Grenoble Alpes)
Analyst: Mélanie Noury
Mineral: apatite
Dosimeter Glass: IRMM540R
Dosimeter Glass U ppm: 15
Irradiation: ISTerre-1-2017
Count Date:
Locality: Saint-Martin island
Rock Type: granodiorite
Rock Age: Oligocene
Acquisition system: Olympus BX51
Magnification: 1250x
Radiation Facility: FRM II reactor, Garching, Germany
Total Thermal Neutron Fluence: 4.5x10^15 n/cm^2
Position in Irradiation Canister (#): 23
Area of Graticule Square: 6.39E-7
No. of Crystals Counted: 15
Zeta Factor: 277.3
Zeta Factor Error (1s): 15.9
Rho d: 1258000
Rho d (% Relative Error): 1.43
N d: 8404
Geometry factor (for EDM and Zeta ICPMS methods): 0.5
Etchant: 5.5 mol HNO3
Etching Conditions: 21°C, 20s
Method - U: EDM
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: Zeta was determined using FCT and Durango age standards
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 ID: SM15-21
Sample Description:
GeoObject Type: Individual Sample
Geoobject Classification:
Collection Method: rock hammer
Material: Rock
Latitude: 18.09972
Longitude: -63.06694
Sample Comment:
Collector:
Material Classification:
Primary Location Name: St. Martin island
Primary Location Type: island
Location Description: west of route du cimetiere
Locality: Grand Case
Locality Description:
Country: France
Provice: Saint-Martin
County:
City Or Township:
Platform:
Platform ID:
Original Archival Institution:
Original Archival Contact:
Most Recent Archival Institution:
Most Recent Archival Contact:
| 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 |
46.1 |
12 |
12 |
|
|
19 |
53.0 |
9.2 |
9.2 |
46.5 |
12.2 |
12.2 |
22 |
|
|
|
|
|
|
|
| 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 |
4 |
16 |
64 |
1.94 |
|
|
97809 |
391236 |
0.25000 |
4.0896E-5 |
|
|
|
4.66 |
2.30 |
43.5 |
24.4 |
24.4 |
|
|
|
|
|
|
|
|
|
|
|
| 2 |
8 |
37 |
60 |
2.15 |
|
|
208659 |
965050 |
0.21622 |
3.834E-5 |
|
|
|
11.51 |
3.77 |
37.6 |
14.8 |
14.8 |
|
|
|
|
|
|
|
|
|
|
|
| 3 |
2 |
15 |
30 |
2.38 |
|
|
104330 |
782473 |
0.13333 |
1.917E-5 |
|
|
|
9.33 |
4.75 |
23.2 |
17.5 |
17.5 |
|
|
|
|
|
|
|
|
|
|
|
| 4 |
3 |
10 |
40 |
2.70 |
|
|
117371 |
391236 |
0.30000 |
2.556E-5 |
|
|
|
4.66 |
2.88 |
52.1 |
34.4 |
34.4 |
|
|
|
|
|
|
|
|
|
|
|
| 5 |
8 |
30 |
100 |
2.96 |
|
|
125196 |
469484 |
0.26667 |
6.39E-5 |
|
|
|
5.60 |
2.03 |
46.3 |
18.6 |
18.6 |
|
|
|
|
|
|
|
|
|
|
|
| 6 |
4 |
25 |
80 |
2.66 |
|
|
78247 |
489045 |
0.16000 |
5.112E-5 |
|
|
|
5.83 |
2.32 |
27.8 |
15.1 |
15.1 |
|
|
|
|
|
|
|
|
|
|
|
| 7 |
4 |
8 |
40 |
2.11 |
|
|
156495 |
312989 |
0.50000 |
2.556E-5 |
|
|
|
3.73 |
2.56 |
86.6 |
53.3 |
53.3 |
|
|
|
|
|
|
|
|
|
|
|
| 8 |
4 |
32 |
60 |
2.63 |
|
|
104330 |
834637 |
0.12500 |
3.834E-5 |
|
|
|
9.95 |
3.50 |
21.8 |
11.6 |
11.6 |
|
|
|
|
|
|
|
|
|
|
|
| 9 |
10 |
30 |
60 |
2.42 |
|
|
260824 |
782473 |
0.33333 |
3.834E-5 |
|
|
|
9.33 |
3.39 |
57.9 |
21.4 |
21.4 |
|
|
|
|
|
|
|
|
|
|
|
| 10 |
9 |
49 |
100 |
2.19 |
|
|
140845 |
766823 |
0.18367 |
6.39E-5 |
|
|
|
9.14 |
2.61 |
32.0 |
11.7 |
11.7 |
|
|
|
|
|
|
|
|
|
|
|
| 11 |
8 |
23 |
100 |
2.23 |
|
|
125196 |
359937 |
0.34783 |
6.39E-5 |
|
|
|
4.29 |
1.77 |
60.4 |
25.0 |
25.0 |
|
|
|
|
|
|
|
|
|
|
|
| 12 |
2 |
14 |
40 |
2.72 |
|
|
78247 |
547731 |
0.14286 |
2.556E-5 |
|
|
|
6.53 |
3.44 |
24.9 |
18.9 |
18.9 |
|
|
|
|
|
|
|
|
|
|
|
| 13 |
4 |
6 |
36 |
1.99 |
|
|
173883 |
260824 |
0.66667 |
2.3004E-5 |
|
|
|
3.11 |
2.44 |
115.2 |
74.7 |
74.7 |
|
|
|
|
|
|
|
|
|
|
|
| 14 |
14 |
20 |
60 |
2.51 |
|
|
365154 |
521648 |
0.70000 |
3.834E-5 |
|
|
|
6.22 |
2.75 |
121.0 |
42.7 |
42.7 |
|
|
|
|
|
|
|
|
|
|
|
| 15 |
9 |
36 |
70 |
2.15 |
|
|
201207 |
804829 |
0.25000 |
4.473E-5 |
|
|
|
9.60 |
3.19 |
43.5 |
16.4 |
16.4 |
|
|
|
|
|
|
|
|
|
|
|
| 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:22679.xml
