This sample belongs to: Mélanie Noury

Sample Details
Sample Name: SM15-18_zft
IGSN: IEMNX0003
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 (#): 15
Area of Graticule Square: 6.39E-7
No. of Crystals Counted: 20
Zeta Factor: 125.5
Zeta Factor Error (1s): 6.2
Rho d: 362360
Rho d (% Relative Error): 2.06
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 Metadata
Sample ID: SM15-18
Sample Description:
GeoObject Type: Individual Sample
Geoobject Classification:
Collection Method: rock hammer
Material: Rock
Latitude: 18.10722
Longitude: -63.045
Sample Comment:
Collector:
Material Classification:
Primary Location Name: St. Martin island
Primary Location Type: island
Location Description: East of First Stick Hill
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:

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 30.1 4.1 4.1 37 31.5 2.9 2.9 30.1 2.6 2.6 0

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 25 11 27 1449023 637570 2.27273 1.7253E-5 26.4 15.6 51.5 18.8 18.8
2 54 38 70 1207243 849542 1.42105 4.473E-5 35.2 11.4 32.2 7.0 7.0
3 30 31 80 586854 606416 0.96774 5.112E-5 25.1 9.0 22.0 5.7 5.7
4 68 51 60 1773605 1330203 1.33333 3.834E-5 55.1 15.5 30.2 5.8 5.8
5 101 73 40 3951487 2856025 1.38356 2.556E-5 118.2 28.0 31.4 5.1 5.1
6 77 52 24 5020866 3390715 1.48077 1.5336E-5 140.4 39.2 33.6 6.3 6.3
7 54 56 100 845070 876369 0.96429 6.39E-5 36.3 9.8 21.9 4.3 4.3
8 32 42 70 715404 938967 0.76190 4.473E-5 38.9 12.0 17.3 4.2 4.2
9 74 60 100 1158059 938967 1.23333 6.39E-5 38.9 10.1 28.0 5.1 5.1
10 35 28 60 912885 730308 1.25000 3.834E-5 30.2 11.4 28.4 7.3 7.3
11 23 17 60 599896 443401 1.35294 3.834E-5 18.4 8.8 30.7 9.9 9.9
12 118 72 60 3077726 1877934 1.63889 3.834E-5 77.7 18.5 37.2 5.9 5.9
13 91 81 36 3955834 3521127 1.12346 2.3004E-5 145.8 32.8 25.5 4.1 4.1
14 26 15 9 4520953 2608242 1.73333 5.751E-6 108.0 55.0 39.3 12.9 12.9
15 52 46 60 1356286 1199791 1.13043 3.834E-5 49.7 14.7 25.7 5.4 5.4
16 23 13 50 719875 406886 1.76923 3.195E-5 16.8 9.2 40.1 14.1 14.1
17 130 96 35 5812654 4292421 1.35417 2.2365E-5 177.7 36.9 30.7 4.4 4.4
18 44 30 90 765084 521648 1.46667 5.751E-5 21.6 7.9 33.3 8.1 8.1
19 32 22 80 625978 430360 1.45455 5.112E-5 17.8 7.5 33.0 9.3 9.3
20 99 60 100 1549296 938967 1.65000 6.39E-5 38.9 10.121813603656 37.4 6.4 6.4

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:22531.xml
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