Scientific data near [56.66640,-133.25960]

Search area extends approximately 2.2 km east-west and 4.1 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
Areas administered by US Federal agencies
Tongass National Forest	National Forest
National Forest FS	Type of land area
FS	Federal land areas administered by FS

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
PDcf	Sedimentary	Cannery Formation and Porcupine slate of Redman and others (1985), undivided
QTi	Igneous - Plutonic	Young shallow intrusive rocks
Trhg	Sedimentary	Hyd Group, undivided
Trhgs	Sedimentary	Hyd Group sedimentary 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.

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
C104545	sediment
C104848	sediment
C120542	rock	metamorphic metabasalt
C120655	rock	metamorphic metabasalt
CCY421	sediment
CCY506	concentrate	panned C3 fraction
CCZ693	rock	igneous rhyodacite
CCZ694	rock	sedimentary chert
CCZ818	rock	sedimentary clastic
CCZ819	rock	igneous felsic
CCZ820	rock	igneous felsic
CCZ821	rock	sedimentary carbonate
CCZ822	rock	sedimentary carbonate
CDE349	rock	metamorphic metasediment
CDK328	concentrate	panned C3 fraction
CEH526	sediment
CEN097	sediment
CEN580	concentrate	panned C3 fraction
CEP522	rock	metamorphic metatuff
CEP523	rock	metamorphic metatuff
CFB285	concentrate	panned C3 fraction
CFB367	rock
CFJ179	rock	sedimentary siltstone
D233697	rock	igneous rhyodacite
D233698	rock	metamorphic metarhyolite
D540631	rock	igneous basalt
D540632	rock

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
C120542	metamorphic	metabasalt
C120655	metamorphic	metabasalt
CCZ693	igneous	rhyodacite
CCZ694	sedimentary	chert
CCZ818	unspecified
CCZ819	igneous	felsic
CCZ820	igneous	felsic
CCZ821	unspecified
CCZ822	unspecified
CDE349	metamorphic	unspecified
CEP522	metamorphic	metatuff
CEP523	metamorphic	metatuff
CFB367	unspecified
CFJ179	sedimentary	siltstone
D233697	igneous	rhyodacite
D233698	metamorphic	metarhyolite
D540631	igneous	basalt

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
Halobia	Prospect	AG PB ZN AS BA CU
Unnamed (north of mouth of Castle River)	Occurrence	AG BA PB ZN
Unnamed North of Mouth of Castle River	Occurrence	AG BA PB ZN

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
Unnamed (north of mouth of Castl...	Active	Ag;Ba;Cu;Pb;Zn
Halobia	Active	Ag;Pb;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
C104545	stream/river	stream deposit; REANALYZED STR SED:ORIG RASS JOBNO 11102;TAGNO CCY421;FIELDNO 0178; stream
C104848	stream/river	stream deposit; REANALYZED STR SED:ORIG RASS JOBNO 11624;TAGNO CEH526;FIELDNO 1280; stream
CCY421	stream/river	stream
CEH526	stream/river	stream
CEN097	stream/river	stream pebbles;; 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
CCY506	stream/river	insufficient sample - data qualitative;; stream
CDK328	stream/river	stream
CEN580	stream/river	stream
CFB285	stream/river	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.

Database Home

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.