Sample Name: 19054LU
IGSN: IELCD001R
Laboratory: Thermochronology laboratory and research center (CPGeo_LTC) at the University of Sao Paulo, Brazil (USP)
Analyst: Marlene Flores
Mineral: Apatite
Dosimeter Glass: CN1
Dosimeter Glass U ppm: 39.8
Irradiation: USP28
Count Date: 19/12/2020
Locality:
Rock Type:
Rock Age:
Acquisition system:
Magnification:
Radiation Facility:
Total Thermal Neutron Fluence:
Position in Irradiation Canister (#): 7
Area of Graticule Square: 7.62129E-7
No. of Crystals Counted: 30
Zeta Factor: 135.4
Zeta Factor Error (1s): 5.2
Rho d: 2206707.208
Rho d (% Relative Error):
N d: 10176
Geometry factor (for EDM and Zeta ICPMS methods):
Etchant: 5.5 N nitric acid
Etching Conditions: 21°C 20 sec
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:
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: 19054Lu
Sample Description:
GeoObject Type: Individual Sample
Geoobject Classification:
Collection Method: Manual
Material: Rock
Latitude: 4.24859
Longitude: -75.3187
Sample Comment:
Collector: Sebastian Zapata
Material Classification:
Primary Location Name:
Primary Location Type:
Location Description:
Locality:
Locality Description:
Country: Colombia
Provice:
County:
City Or Township: Rovira
Platform:
Platform ID:
Original Archival Institution:
Original Archival Contact:
Most Recent Archival Institution: Universidad Nacional de Colombia, Sede Medellin
Most Recent Archival Contact: