Sample ID: 87705
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? YES 		Age: 32.5
Min Age: 30
Max Age: 35
Geological Age: OLIGOCENE
Age Method: REG-COR

Material: IGNEOUS
Type: VOLCANIC
Composition: INTERMEDIATE
Rock Name: ANDESITE



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 ND ND143_ND144 RB SR TH Y
2006-020188 XRF WHOLE ROCK 60.31 1.02 16.49 5.73 3.35 5.67 3.47 3.48 0.39 0.1                                  
2006-020188 INAA WHOLE ROCK                     36.4 71 6.78 1.74 0.7 2.4 0.36 33 190 1223 8 33   58 798 4.2 28
2006-020188 MC-ICP-MS MINERAL                                             0.512162        


Total Alkali vs Silica


Element Normalization
  Th
Eu
Lu
Nb
Nd
Ni
Rb
Sm
Tb
Zr
Ce
Ba
La
Sr
Y
Yb
SAMPLE VALUE 4.2 1.74 0.36 8 33 33 58 6.78 0.7 190 71 1223 36.4 798 28 2.4
  PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM
REF STANDARD 79.5 154 67.5 658 1250 1960 0.6 406 99 10.5 1675 6600 648 19.9 4.3 441
  PPB  PPB  PPB  PPB  PPB  PPB  PPM  PPB  PPB  PPM  PPB  PPB  PPB  PPM  PPM  PPB 






Isotope Chemistry
143Nd/144Nd
0.512162