Sample ID: 83408
Georef Number: 2006-020188
Reference Title: Origin of rhyolite by crustal melting and the nature of parentalmagmas in the Oligocene Conejos Formation, San Juan Mountains,Colorado, USA
Reference Author: Parker, D F; Ghosh, A; Price, C W; Rinard, B D; Cullers, R L; Ren, M

Location

Sample Detail


Major Data? YES
Trace Data? YES
Isotope Data? NO 		Age: 32.5
Min Age: 30
Max Age: 35
Geological Age: OLIGOCENE
Age Method: REG-COR

Material: IGNEOUS
Type: VOLCANIC
Composition: FELSIC
Rock Name: DACITE



Rock Data
Reference Technique Material SIO2 TIO2 AL2O3 FEO MGO CAO NA2O K2O P2O5 MNO LA CE SM EU TB YB LU NI ZR BA NB RB SR TH Y
2006-020188 XRF WHOLE ROCK 65.72 0.65 15.56 3.69 2.87 3.51 3.67 3.96 0.32 0.06                              
2006-020188 INAA WHOLE ROCK                     32.1 59.2 4.85 1.18 0.42 1.12 0.18 20 182 1302 7 64 647 5.4 19


Total Alkali vs Silica


Element Normalization
  Th
Eu
Lu
Nb
Ni
Rb
Sm
Tb
Zr
Ce
Ba
La
Sr
Y
Yb
SAMPLE VALUE 5.4 1.18 0.18 7 20 64 4.85 0.42 182 59.2 1302 32.1 647 19 1.12
  PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM
REF STANDARD 79.5 154 67.5 658 1960 0.6 406 99 10.5 1675 6600 648 19.9 4.3 441
  PPB  PPB  PPB  PPB  PPB  PPM  PPB  PPB  PPM  PPB  PPB  PPB  PPM  PPM  PPB