This sample belongs to: Mélanie Noury

Sample Details
Sample Name: SM15-17_zft
IGSN: IEMNX0004
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 (#): 14
Area of Graticule Square: 6.39E-7
No. of Crystals Counted: 19
Zeta Factor: 125.5
Zeta Factor Error (1s): 6.2
Rho d: 361800
Rho d (% Relative Error): 1.99
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: SM15-17
Sample Description:
GeoObject Type: Individual Sample
Geoobject Classification:
Collection Method: rock hammer
Material: Rock
Latitude: 18.02583
Longitude: -63.0575
Sample Comment:
Collector:
Material Classification:
Primary Location Name: St. Martin island
Primary Location Type: island
Location Description: Fort Hill road
Locality: Philipsburg
Locality Description:
Country: Netherlands Antilles
Provice: Sant Marteen
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 26.24 4.5 4.5 30 28.6 4.2 4.2 26.3 4.0 4.0 15

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 13 7 14 1453163 782473 1.85714 8.946E-6 32.4 23.7 42.0 19.8 19.8
2 31 33 48 1010694 1075900 0.93939 3.0672E-5 44.6 15.5 21.3 5.4 5.4
3 14 12 20 1095462 938967 1.16667 1.278E-5 38.9 22.1 26.4 10.5 10.5
4 16 14 40 625978 547731 1.14286 2.556E-5 22.7 12.0 25.9 9.6 9.6
5 36 21 18 3129890 1825769 1.71429 1.1502E-5 75.7 32.8 38.8 10.8 10.8
6 50 28 15 5216484 2921231 1.78571 9.585E-6 121.1 45.6 40.4 9.8 9.8
7 8 7 16 782473 684664 1.14286 1.0224E-5 28.4 20.8 25.9 13.5 13.5
8 18 7 24 1173709 456442 2.57143 1.5336E-5 18.9 13.8 58.1 26.1 26.1
9 19 19 30 991132 991132 1.00000 1.917E-5 41.1 18.7 22.7 7.4 7.4
10 42 54 70 938967 1207243 0.77778 4.473E-5 50.1 13.7 17.6 3.7 3.7
11 19 13 24 1238915 847679 1.46154 1.5336E-5 35.1 19.2 33.1 12.0 12.0
12 11 13 20 860720 1017214 0.84615 1.278E-5 42.2 23.0 19.2 7.9 7.9
13 12 9 9 2086594 1564945 1.33333 5.751E-6 64.9 42.2 30.2 13.4 13.4
14 22 23 30 1147626 1199791 0.95652 1.917E-5 49.7 20.6 21.7 6.6 6.6
15 15 12 12 1956182 1564945 1.25000 7.668E-6 64.9 36.8 28.3 11.1 11.1
16 66 51 100 1032864 798122 1.29412 6.39E-5 33.1 9.3 29.3 5.7 5.7
17 10 12 9 1738828 2086594 0.83333 5.751E-6 86.5 49.1 18.9 8.1 8.1
18 24 34 21 1788509 2533721 0.70588 1.3419E-5 105.0 36.0 16.0 4.3 4.3
19 43 36 60 1121544 938967 1.19444 3.834E-5 38.9 13.0 27.1 6.3 6.3

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:22525.xml
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