AGDB2 rock sample M178992

(metamorphic, greenstone)

Field Value
Lab ID M178992
Field ID 87RN286B
Job ID LV56
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 unknown; mafic (greenstone, greenschist, amphibolite)
Geologic age Devonian--Pliocene
Stratigraphic unit Greens Ck mine 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 365 parts per million by weight EDX
Nickel 92 parts per million by weight EDX
Rubidium 56 parts per million by weight EDX
Strontium 72 parts per million by weight EDX
Yttrium 30 parts per million by weight EDX
Zirconium 88 parts per million by weight EDX
Niobium 18 parts per million by weight EDX
Element Value Units Technique Digestion Decomposition Laboratory
Sulfur 0.076 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
Sulfur 0.076 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
Chromium 365 ppm XRF T EDXRF USGS-BGC
Nickel 92 ppm XRF T EDXRF USGS-BGC
Rubidium 56 ppm XRF T EDXRF USGS-BGC
Strontium 72 ppm XRF T EDXRF USGS-BGC
Yttrium 30 ppm XRF T EDXRF USGS-BGC
Zirconium 88 ppm XRF T EDXRF USGS-BGC
Niobium 18 ppm XRF T EDXRF USGS-BGC
Al2O3 15.3 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
CaO 6.12 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
FeO 8.75 pct TT T HF-H2SO4 USGS-BGC
FeTO3 10.9 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
K2O 2.54 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
LOI 8.63 pct GV T combustion USGS-BGC
MgO 8.41 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
MnO 0.2 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
Na2O 0.89 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
P2O5 0.19 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
SiO2 45.3 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC
TiO2 1.33 pct XRF T LiBO2-Li2B4O7 fusion USGS-BGC