Scientific data near [57.51644,-134.08525]

Search area extends approximately 8.9 km east-west and 16.6 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Map quadrangles, from USGS or Canadian NTS
Sitka C-1	1:63,360 Alaska quadrangle
Sitka	1:250,000 Alaska quadrangle
Watershed boundaries (USGS hydrologic units)
Admiralty Island	hydrologic unit
190102	hydrologic accounting unit
Arctic Slope	hydrologic subregion
Alaska	hydrologic region
Areas administered by US Federal agencies

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
Dgb	Metamorphic	Gambier Bay Formation, undivided
Dgbm	Metamorphic	Marble of the Gambier Bay Formation
PDcf	Sedimentary	Cannery Formation and Porcupine slate of Redman and others (1985), undivided
PDcf	Sedimentary	Cannery Formation and Porcupine slate of Redman and others (1985), undivided
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
Southeastern Alaska	M-D	Southeastern Alaska 12364 line km with spacing 9.60 km over parts of AK
Sitka	M/R-D	Sitka 579 line km with spacing 9.60 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-SE05	Sierran Kuroko mass. sulf.
AK-SE13	Polymetallic vein
AK-SE17	Synorogenic-synvolcanic Ni-Cu

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
Alexander	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
C126529	rock	metamorphic greenschist
D515172	sediment
D515187	sediment
D515195	sediment
D515196	sediment
D515197	sediment
D515684	concentrate	panned C3 fraction
D515699	concentrate	panned C3 fraction
D515707	concentrate	panned C3 fraction
D515708	concentrate	panned C3 fraction
D515709	concentrate	panned C3 fraction
D516596	rock	metamorphic greenschist
D516597	rock	sedimentary limestone
D516598	rock	igneous basalt
D516599	rock	sedimentary limestone
D516600	rock	igneous basalt
D516601	rock	metamorphic unspecified
D516602	rock	sedimentary limestone
D516603	rock	sedimentary limestone
D516604	rock	sedimentary limestone
D516605	rock	igneous basalt
D516606	rock	sedimentary limestone
D516608	rock	igneous basalt
D516609	rock	igneous basalt
D516610	rock	metamorphic metacarbonate
D516611	rock	igneous basalt
D516612	rock	sedimentary limestone
D516613	rock	metamorphic schist
D516614	rock	metamorphic greenschist
D516615	rock	sedimentary conglomerate
D516616	rock	sedimentary chert
D516637	rock	metamorphic metacarbonate
D516639	rock	igneous basalt
D563414	rock	metamorphic greenschist
D563547	rock	metamorphic greenschist
D563676	rock	sedimentary argillite
D563708	rock	metamorphic quartzite

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
7020938	1979-09-22	Wet stream sediment sample dried at less than or equal to 100øC and sieved to -100 mesh through stainless steel sieves.
7020942	1979-09-22	Wet stream sediment sample dried at less than or equal to 100øC and sieved to -100 mesh through stainless steel sieves.
7021077	1979-09-25	Wet natural-pond (or lake in Alaska) 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
3022569	1979-09-22	Stream water sample acidified to a pH of less than or equal to 1 with reagent-grade nitric acid.
3022573	1979-09-22	Stream water sample acidified to a pH of less than or equal to 1 with reagent-grade nitric acid.
3022708	1979-09-25	Natural-pond (or lake in Alaska) 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
C126529	metamorphic	greenschist
D516596	metamorphic	greenschist
D516597	sedimentary	limestone
D516598	igneous	basalt
D516599	sedimentary	limestone
D516600	igneous	basalt
D516601	metamorphic	unspecified
D516602	sedimentary	limestone
D516603	sedimentary	limestone
D516604	sedimentary	limestone
D516605	igneous	basalt
D516606	sedimentary	limestone
D516608	igneous	basalt
D516609	igneous	basalt
D516610	metamorphic	metacarbonate
D516611	igneous	basalt
D516612	sedimentary	limestone
D516613	metamorphic	schist
D516614	metamorphic	greenschist
D516615	sedimentary	conglomerate
D516616	sedimentary	chert
D516637	metamorphic	metacarbonate
D516639	igneous	basalt
D563414	metamorphic	schist
D563547	metamorphic	greenschist
D563676	sedimentary	argillite
D563708	metamorphic	quartzite
D564612	igneous	tuff

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
Cook Prospect	Prospect	CU AU AG
Gambier Bay Gold-Copper Prospect	Occurrence	AU CU
Gambier Bay Gold-Copper Prospect	Occurrence	AU CU
Gambier Bay	Unknown	AU CU
Brown Prospect	Prospect	CU 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
Cook; Coronado	Inactive	Au;Cu
Brown	Inactive	Au;Cu

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.

Database Home

Sample ID	Sample source	Sample notes
D515172	stream/river	stream
D515187	stream/river	stream
D515195	stream/river	stream
D515196	stream/river	stream
D515197	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
D515684	stream/river	panned concentrate;; stream
D515699	stream/river	panned concentrate;; stream
D515707	stream/river	panned concentrate;; stream
D515708	stream/river	panned concentrate;; stream
D515709	stream/river	panned concentrate;; stream

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
Late Continental Arc	porphyry copper	Porphyry Cu systems associated with predominantly calc-alkalic igneous rocks of post-accretionary continental magmatic arcs (Oligocene-Pliocene)
Intermontane Island-Arc	porphyry copper	Porphyry Cu systems associated with pre-accretionary Triassic and Jurassic calc-alkalic island arcs that formed offshore of western North America
Intermontane Island-Arc Cu-Au	porphyry copper	Triassic and Jurassic alkalic igneous rocks of accreted island arcs that formed offshore of western North America
Insular Mixed Island- and Continental Arc	porphyry copper	Calc-alkalic igneous rocks of accreted Jurassic island-arc terranes
Cordilleran Continental Arc	porphyry copper	Porphyry Cu systems associated with predominantly calc-alkalic igneous rocks of post-accretionary continental magmatic arcs (Jurassic-Eocene)
Southeast Alaska Tertiary	porphyry copper	Tertiary subduction and postsubduction calc-alkalic plutons of southeast Alaska
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.