Scientific data near [56.54722,-133.04083]

Search area extends approximately 2.2 km east-west and 4.0 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Map quadrangles, from USGS or Canadian NTS
Petersburg C-4	1:63,360 Alaska quadrangle
Petersburg	1:250,000 Alaska quadrangle
Watershed boundaries (USGS hydrologic units)
Kuiu-Kupreanof-Mitkof-Etolin-	hydrologic unit
190102	hydrologic accounting unit
Arctic Slope	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
Keg	Igneous - Plutonic	Granodiorite and other plutonic rocks
Trhgs	Sedimentary	Hyd Group sedimentary rocks, undivided
Trhgv	Sedimentary	Hyd Group igneous rocks, undivided
Trhgv	Sedimentary	Hyd Group igneous rocks, 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
Petersburg '78	M-D	Petersburg '78 13920 line km with spacing 1.60 km over parts of AK
Petersburg	M/R-D	Petersburg 1472 line km with spacing 9.60 km over parts of AK
Stikine - Duncan Canal	M/EM-D	Stikine - Duncan Canal 5489 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-SE05	Sierran Kuroko mass. sulf.
AK-SE03	Low-sulfide Au-quartz veins

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
CEG067	rock	metamorphic phyllite-slate
CEG068	rock	metamorphic greenstone
CEG069	rock	igneous felsic
CEG070	rock	igneous felsic
CEG071	rock	igneous mafic
CEG072	rock	igneous felsic
CEG073	rock	igneous felsic
CEG074	rock	metamorphic phyllite-slate
CEG075	rock	metamorphic schist
D233341	rock	igneous rhyolite
D233342	rock	igneous unspecified
D233343	rock	igneous greenstone
D233344	rock	igneous rhyolite
D233345	rock	igneous unspecified
D233346	rock	metamorphic phyllite
D233347	rock	metamorphic schist
D542381	rock	metamorphic phyllite
M144912	rock	metamorphic greenstone

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
7001828	1979-09-10	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.

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
CCZ952	igneous	mafic
CEG067	metamorphic	phyllite-slate
CEG068	igneous	mafic
CEG069	igneous	felsic
CEG070	igneous	unspecified
CEG071	igneous	mafic
CEG072	igneous	felsic
CEG073	igneous	unspecified
CEG074	metamorphic	phyllite-slate
CEG075	metamorphic	schist
D233341	igneous	rhyolite
D233342	igneous	unspecified
D233343	igneous	greenstone
D233344	igneous	rhyolite
D233345	igneous	unspecified
D233346	metamorphic	phyllite
D233347	metamorphic	schist
D542381	metamorphic	phyllite
M144912	metamorphic	gneiss

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
Independence	Active	Au

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.