Sample Name: SM15-09_aft
IGSN: IEMNX0002
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 (#): 21
Area of Graticule Square: 6.39E-7
No. of Crystals Counted: 22
Zeta Factor: 277.3
Zeta Factor Error (1s): 15.9
Rho d: 1242000
Rho d (% Relative Error): 1.20
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: SM15-09
Sample Description:
GeoObject Type: Individual Sample
Geoobject Classification:
Collection Method: rock hammer
Material: Rock
Latitude: 18.11083
Longitude: -63.05278
Sample Comment:
Collector:
Material Classification:
Primary Location Name: St. Martin island
Primary Location Type: island
Location Description: North of Grand Case
Locality:
Locality Description:
Country: France
Provice: St. Martin
County:
City Or Township:
Platform:
Platform ID:
Original Archival Institution:
Original Archival Contact:
Most Recent Archival Institution:
Most Recent Archival Contact: