Scientific data near [55.19083,-160.54861]

Search area extends approximately 2.2 km east-west and 3.9 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Aleutians East	Borough
Alaska	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Port Moller A-2	1:63,360 Alaska quadrangle
Port Moller	1:250,000 Alaska quadrangle
Watershed boundaries (USGS hydrologic units)
Cold Bay	hydrologic unit
190301	hydrologic accounting unit
Yukon	hydrologic subregion
Alaska	hydrologic region
Areas administered by US Federal agencies
Alaska Maritime National Wildlife Refuge	National Wildlife Refuge
National Wildlife Refuge FWS	Type of land area
FWS	Federal land areas administered by FWS

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
Qs	Unconsolidated	Unconsolidated surficial deposits, undivided
Qs	Unconsolidated	Unconsolidated surficial deposits, undivided
Tmv	Igneous - Volcanic	Meshik Volcanics and similar rock units
w		Water

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
Unga Island	M/EM/V-D	Unga Island 820 line km with spacing 0.15 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-AP04	Epithermal vein, generic
AK-AP09	Porphyry Cu, BC-Ak type
AK-AP13	Polymetallic vein
AK-AP11	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
Chugach	Accretionary wedge	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
CGE088	concentrate	panned C3 fraction
CGE105	concentrate	panned C3 fraction
CGE159	sediment
CGE217	sediment
CGE234	sediment
CGE670	rock	igneous volcanic
CHG315	concentrate	panned C3 fraction
F000361	rock	igneous unspecified
F000362	rock	igneous unspecified
F000363	rock	igneous unspecified
F000364	rock	igneous unspecified
F000365	rock	igneous unspecified
F000366	rock	igneous unspecified
F000367	rock	igneous unspecified
F000368	rock	igneous unspecified
M177872	rock	igneous quartz porphyry
M190341	mineral
M190342	mineral

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
CGE670	igneous	volcanic
M177872	igneous	quartz porphyry

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
Sitka	Past Producer	AG AU CU PB ZN
Delarof Harbor	Occurrence	AU
Apollo Creek	Occurrence	AU

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
Sitka; Sitka Gold Mine; Unga	Active	Ag;Au
Delarof Harbor	Inactive	Au
Olgen	Inactive	Au

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
CGE159	stream/river	siliceous alteration; base metal mineralization;; stream
CGE217	stream/river	base metal mineralization;; stream
CGE234	stream/river	stream

National Geochemical Database: Concentrate

Geochemistry of concentrates 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
CGE088	stream/river	stream
CGE105	stream/river	stream
CHG315		insufficient sample - data qualitative;

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
Alaska Peninsula and Aleutian Islands	porphyry copper	Tertiary felsic to intermediate composition intrusions of the Alaska Peninsula and Aleutian Islands
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.