AGDB2 rock sample M178987

(metamorphic, greenstone)

Field Value
Lab ID M178987
Field ID 87RN286F
Job ID LV55
Sample submitter Brew, David A.
Project name Juneau AMRAP
Date submitted 7/22/1987 0:00:00
Country United States
State AK
Map quadrangle Juneau
Geographic latitude 58.10278
Geographic longitude -134.66111
loc_desc Mariposite Ridge; Greens Ck VMS deposit area
Sample source outcrop
Collection method composite
Primary media type rock
Secondary media type metamorphic
Sample media name greenstone
Sample comment GST; protolith basalt
Additional sample attributes metasomatism unknown; quartz present; mafic (greenstone, greenschist, amphibolite)
Geologic age Devonian--Triassic
Stratigraphic unit carb-altd ""mafic tuff
Alteration type altered
Metamorphic setting regional
Metamorphic facies or grade greenschist
(click for info)
Geologic map unit -134.66111, 58.10278
Nearby scientific data Find additional scientific data near this location
Element Measured value Units of measure Analytical method
Chromium 980 parts per million by weight EDX
Nickel 325 parts per million by weight EDX
Rubidium 20 parts per million by weight EDX
Strontium 122 parts per million by weight EDX
Yttrium 24 parts per million by weight EDX
Zirconium 98 parts per million by weight EDX
Niobium 20 parts per million by weight EDX
Element Value Units Technique Digestion Decomposition Laboratory
Sulfur 0.17 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
Sulfur 0.17 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
Chromium 980 ppm XRF T EDXRF USGS-BGC
Nickel 325 ppm XRF T EDXRF USGS-BGC
Rubidium 20 ppm XRF T EDXRF USGS-BGC
Strontium 122 ppm XRF T EDXRF USGS-BGC
Yttrium 24 ppm XRF T EDXRF USGS-BGC
Zirconium 98 ppm XRF T EDXRF USGS-BGC
Niobium 20 ppm XRF T EDXRF USGS-BGC
Al2O3 12.3 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
CaO 6.62 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
FeO 7.34 pct TT T HF-H2SO4 USGS-BGC
FeTO3 10.3 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
K2O 0.78 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
LOI 11.2 pct GV T combustion USGS-BGC
MgO 8.79 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
MnO 0.49 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
Na2O 2.31 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
P2O5 0.15 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
SiO2 44.8 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
TiO2 1.38 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC