This sample belongs to: Mélanie Noury
Sample Name: SM15-21_zft
IGSN: IEMNX0005
Laboratory: ISTerre fission-track lab (Geo-Thermochronology Platform, Univ. Grenoble Alpes)
Analyst: Mélanie Noury
Mineral: zircon
Dosimeter Glass: IRMM541
Dosimeter Glass U ppm: 50
Irradiation: ISTerre-3-2017
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: 0.5x10^15 n/cm^2
Position in Irradiation Canister (#): 16
Area of Graticule Square: 6.39E-7
No. of Crystals Counted: 19
Zeta Factor: 125.5
Zeta Factor Error (1s): 6.2
Rho d: 362920
Rho d (% Relative Error): 2.14
N d: 7192
Geometry factor (for EDM and Zeta ICPMS methods): 0.5
Etchant: eutectic NaOH-KOH melt
Etching Conditions: 228°C
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 |
30.1 |
5.1 |
5.1 |
|
|
0 |
32.9 |
5.0 |
5.0 |
29.1 |
6.0 |
6.0 |
32 |
|
|
|
|
|
|
|
| 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 |
18 |
14 |
40 |
|
|
|
704225 |
547731 |
1.28571 |
2.556E-5 |
|
|
|
22.6 |
11.9 |
29.2 |
10.5 |
10.5 |
|
|
|
|
|
|
|
|
|
|
|
| 2 |
30 |
18 |
36 |
|
|
|
1304121 |
782473 |
1.66667 |
2.3004E-5 |
|
|
|
32.3 |
15.1 |
37.8 |
11.4 |
11.4 |
|
|
|
|
|
|
|
|
|
|
|
| 3 |
25 |
18 |
50 |
|
|
|
782473 |
563380 |
1.38889 |
3.195E-5 |
|
|
|
23.3 |
10.9 |
31.6 |
9.9 |
9.9 |
|
|
|
|
|
|
|
|
|
|
|
| 4 |
31 |
14 |
50 |
|
|
|
970266 |
438185 |
2.21429 |
3.195E-5 |
|
|
|
18.1 |
9.5 |
50.2 |
16.4 |
16.4 |
|
|
|
|
|
|
|
|
|
|
|
| 5 |
14 |
25 |
40 |
|
|
|
547731 |
978091 |
0.56000 |
2.556E-5 |
|
|
|
40.4 |
16.1 |
12.7 |
4.3 |
4.3 |
|
|
|
|
|
|
|
|
|
|
|
| 6 |
14 |
12 |
20 |
|
|
|
1095462 |
938967 |
1.16667 |
1.278E-5 |
|
|
|
38.8 |
22.0 |
26.5 |
10.5 |
10.5 |
|
|
|
|
|
|
|
|
|
|
|
| 7 |
6 |
16 |
15 |
|
|
|
625978 |
1669275 |
0.37500 |
9.585E-6 |
|
|
|
69.0 |
34.1 |
8.5 |
4.1 |
4.1 |
|
|
|
|
|
|
|
|
|
|
|
| 8 |
8 |
10 |
12 |
|
|
|
1043297 |
1304121 |
0.80000 |
7.668E-6 |
|
|
|
53.9 |
33.3 |
18.2 |
8.7 |
8.7 |
|
|
|
|
|
|
|
|
|
|
|
| 9 |
54 |
25 |
50 |
|
|
|
1690141 |
782473 |
2.16000 |
3.195E-5 |
|
|
|
32.3 |
12.9 |
49.0 |
12.1 |
12.1 |
|
|
|
|
|
|
|
|
|
|
|
| 10 |
11 |
15 |
20 |
|
|
|
860720 |
1173709 |
0.73333 |
1.278E-5 |
|
|
|
48.5 |
24.7 |
16.7 |
6.7 |
6.7 |
|
|
|
|
|
|
|
|
|
|
|
| 11 |
11 |
7 |
20 |
|
|
|
860720 |
547731 |
1.57143 |
1.278E-5 |
|
|
|
22.6 |
16.6 |
35.7 |
17.3 |
17.3 |
|
|
|
|
|
|
|
|
|
|
|
| 12 |
28 |
24 |
50 |
|
|
|
876369 |
751174 |
1.16667 |
3.195E-5 |
|
|
|
31.0 |
12.6 |
26.5 |
7.5 |
7.5 |
|
|
|
|
|
|
|
|
|
|
|
| 13 |
20 |
11 |
20 |
|
|
|
1564945 |
860720 |
1.81818 |
1.278E-5 |
|
|
|
35.6 |
21.0 |
41.3 |
15.6 |
15.6 |
|
|
|
|
|
|
|
|
|
|
|
| 14 |
16 |
4 |
35 |
|
|
|
715404 |
178851 |
4.00000 |
2.2365E-5 |
|
|
|
7.4 |
7.0 |
90.5 |
50.8 |
50.8 |
|
|
|
|
|
|
|
|
|
|
|
| 15 |
21 |
15 |
25 |
|
|
|
1314554 |
938967 |
1.40000 |
1.5975E-5 |
|
|
|
38.8 |
19.8 |
31.8 |
10.9 |
10.9 |
|
|
|
|
|
|
|
|
|
|
|
| 17 |
47 |
46 |
100 |
|
|
|
735524 |
719875 |
1.02174 |
6.39E-5 |
|
|
|
29.8 |
8.8 |
23.2 |
5.0 |
5.0 |
|
|
|
|
|
|
|
|
|
|
|
| 18 |
27 |
30 |
64 |
|
|
|
660211 |
733568 |
0.90000 |
4.0896E-5 |
|
|
|
30.3 |
11.1 |
20.5 |
5.5 |
5.5 |
|
|
|
|
|
|
|
|
|
|
|
| 19 |
39 |
34 |
80 |
|
|
|
762911 |
665102 |
1.14706 |
5.112E-5 |
|
|
|
27.5 |
9.4 |
26.1 |
6.3 |
6.3 |
|
|
|
|
|
|
|
|
|
|
|
| 20 |
72 |
34 |
100 |
|
|
|
1126761 |
532081 |
2.11765 |
6.39E-5 |
|
|
|
22.0 |
7.5 |
48.0 |
10.3 |
10.3 |
|
|
|
|
|
|
|
|
|
|
|
| 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:22524.xml
