Scientific data near [63.21300,-149.65100]

Search area extends approximately 2.2 km east-west and 4.9 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Matanuska-Susitna	Borough
Alaska	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Healy A-6	1:63,360 Alaska quadrangle
Healy	1:250,000 Alaska quadrangle
Watershed boundaries (USGS hydrologic units)
Chulitna River	hydrologic unit
190205	hydrologic accounting unit
Northwest Alaska	hydrologic subregion
Alaska	hydrologic region

Geology of US states

Digital geologic maps of the US states with consistent lithology, age, GIS database structure, and format

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Map symbol	Lithology	Unit name
Dmi	Metamorphic	Metamorphosed mafic igneous rocks
TKg	Igneous - Plutonic	Felsic granitic rocks
TrPzvs	Sedimentary	Volcanic and sedimentary rocks
Trrs	Sedimentary	Red beds

Airborne geophysical surveys

Aerial surveys of magnetic anomaly and gamma ray emission; older surveys were analog record which have been digitized, newer surveys collected data in digital form.

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ID	Data type	Description
Healy '82	M-D	Healy '82 3975 line km with spacing 1.60 km over parts of AK
Healy	M/R-D	Healy 2116 line km with spacing 9.60 km over parts of AK
Chulitna	M/EM/V-D	Chulitna 2647 line km with spacing 0.40 km over parts of AK

Estimates of undiscovered mineral resources

National Mineral Resource Assessment 1998: Estimates of the number of undiscovered mineral resources of gold, silver, copper, lead, and zinc within identified permissive tracts (geographic areas in which mineral deposits may form).

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Tract	Deposit Type	Mineralization age
AK-SC21	Porphyry Cu, BC-Ak type
AK-SC28	Polymetallic vein
AK-SC31	Cu (Au) skarn
AK-SC25	Placer Au

The continental crust

Seventy-seven major components of the North American continent were delineated at a general scale (1:5,000,000); including the general composition, geological environment, and types of primary metals endowments that can be expected in each domain.

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Domain	Crust type	Region
Chulitna-Broad Pass	Oceanic arc	Alaska

Alaska Geochemical Database, Version 2.0 (AGDB2)--including "best value" data compilations for rock, sediment, soil, mineral, and concentrate sample media

Geochemical analyses of rocks, mineral separates, bulk samples from lake and stream sediments, heavy mineral concentrates, and soils collected by USGS from 1962 to 2009.

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Lab ID	Sample medium	Description
ACF027	sediment
ACF028	sediment
ACF029	sediment
ACF036	soil
ACF037	soil
ACF038	soil
ACF039	soil
ACF040	soil
ACF041	soil
ACF042	soil
ACF043	soil
ACF044	soil
ACF045	soil
ACF046	soil
ACF047	soil
ACF048	soil
ACF049	soil
ACF050	soil
ACF053	soil
ACF054	soil
ACF151	soil
ACF152	soil
ACF153	soil
ACF154	soil
ACF155	soil
ACF156	soil
ACF157	soil
ACF159	soil
ACF160	soil
ACF161	soil
ACF162	soil
ACF163	soil
ACF164	soil
ACF165	soil
ACF166	soil
ACF169	soil
ACF170	soil
ACF171	soil
ACF172	soil
CEW345	rock
CEW346	rock
CEW347	rock

Geochemistry of stream sediments in the US from the NURE-HSSR database

National-scale geochemical analysis of stream sediments and soils in the US collected and analyzed under the National Uranium Resource Evaluation program.

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Sample ID	Date collected	Sample type
7008711	1977-07-18	Wet stream sediment sample dried at less than or equal to 100øC and sieved to -100 mesh through stainless steel sieves.
7008712	1977-07-18	Wet stream sediment sample dried at less than or equal to 100øC and sieved to -100 mesh through stainless steel sieves.

Geochemistry of water samples in the US from the NURE-HSSR database

National-scale geochemical analysis of water samples in the US collected and analyzed under the National Uranium Resource Evaluation program.

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Sample ID	Date collected	Sample type
3009346	1977-07-18	Stream water sample acidified to a pH of less than or equal to 1 with reagent-grade nitric acid.
3009347	1977-07-18	Stream water sample acidified to a pH of less than or equal to 1 with reagent-grade nitric acid.

National Geochemical Database: Rock

Geochemical analysis of rock samples collected and analyzed by the USGS. This dataset includes and supersedes rock data formerly released as "Geochemistry of igneous rocks in the US extracted from the PLUTO database"

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Sample ID	Rock type	Rock name
CEW345	unspecified
CEW346	unspecified
CEW347	unspecified

Mineral Resource Data System

MRDS describes metallic and nonmetallic mineral resources throughout the world. Included are deposit name, location, commodity, deposit description, geologic characteristics, production, reserves, resources, and references.

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Site name	Development	Commodities
Golden Zone Mine	Past Producer	AU AG CU PB ZN SB SN
Lindfors	Prospect	AU CU ZN PB SB
Blt	Prospect	AG AU CU PB ZN
Golden Zone Mine	Occurrence	AU AG CU PB ZN SB SN AS
Mayflower	Prospect	AG AU CU AS PB SB ZN
East Vein	Prospect	AG AU CU PB ZN
Little Vein	Prospect	AG AU CU
Golden Zone	Past Producer	AU AG CU PB ZN
Golden Zone	Producer	AG AU CU PB ZN
Unnamed (upper Bryn Mawr Creek)	Prospect	AU
Bryn Mawr Head	Occurrence	AU CU ZN
Bunkhouse	Prospect	AG AU AS BI HG SB

Alaska Resource Data File

A comprehensive database of Alaskan mineral deposits compiled from the published literature and from unpublished reports and data from industry, the US Bureau of Land Management, and USGS.

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Site	Status	Commodities
Mayflower	Active	Ag;Au;Cu
East Vein	Inactive	Ag;Au;Cu;Pb;Zn
Golden Zone	Active	Ag;Au;Cu
BLT	Active	Ag;Au
Little Vein; Little Lead	Active	Ag;Au;Cu
Lindfors	Active	Au;Cu;Zn

National Geochemical Database: Sediment

Geochemical analysis of sediment samples from the National Geochemical Database. Primarily inorganic elemental concentrations, most samples are of stream sediment in the continental US and Alaska.

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Sample ID	Sample source	Sample notes
ACF026	stream/river	stream
ACF027	stream/river	stream
ACF028	stream/river	stream
ACF029	stream/river	stream

National Geochemical Database: Soil

Geochemical analysis of soil samples from the National Geochemical Database. Primarily inorganic elemental concentrations, most samples are from the continental US and Alaska.

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Sample ID	Sample source	Sample notes
ACF036
ACF037
ACF038
ACF039
ACF040
ACF041
ACF042
ACF043
ACF044
ACF045
ACF046
ACF047
ACF048
ACF049
ACF050
ACF053
ACF054
ACF151
ACF152
ACF153
ACF154
ACF155
ACF156
ACF157
ACF159
ACF160
ACF161
ACF162
ACF163
ACF164
ACF165
ACF166
ACF169
ACF170
ACF171
ACF172

Global assessment of undiscovered copper resources

Deposits, prospects, and permissive tracts for porphyry and sediment-hosted copper resources worldwide, with estimates of undiscovered copper resources.

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Tract name	Deposit type	Geology
Yukon-Tanana Upland	porphyry copper	Kluane Arc and Tertiary Kuskokwim Mountains volcanic-plutonic belt (continuation of Canadian Cordilleran continental arc); north of the Denali Fault
Western Alaska Range	porphyry copper	Cretaceous porphyry prospects along the Kahiltna Basin-Peninsula terrane boundary
Pacific Margin	porphyry copper	Cretaceous through middle Tertiary volcanic and intrusive rocks representing a series of continental- and island-arc systems accreted and superimposed onto the paleomargin of northeast Asia.