Scientific data near [57.67333,-136.08945]

Search area extends approximately 2.2 km east-west and 4.2 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Sitka	Borough
Alaska	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Sitka C-7	1:63,360 Alaska quadrangle
Sitka	1:250,000 Alaska quadrangle
Watershed boundaries (USGS hydrologic units)
Baranof-Chicagof Islands	hydrologic unit
190102	hydrologic accounting unit
Arctic Slope	hydrologic subregion
Alaska	hydrologic region
Areas administered by US Federal agencies
West Chichagof-Yakobi Wilderness	Wilderness
Wilderness FS	Type of land area
FS	Federal land areas administered by FS
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
Kafv	Sedimentary	Volcanic rocks of Chugach accretionary complex
Ksg	Sedimentary	Sitka Graywacke, undivided
Qs	Unconsolidated	Unconsolidated surficial deposits, 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 '78	M-D	Sitka '78 5536 line km with spacing 0.80 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-SE03	Low-sulfide Au-quartz veins
AK-SE10	Basaltic Cu
AK-SE11	Cyprus massive sulfide

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.

Database Home

Lab ID	Sample medium	Description
CCX076	rock
CCX089	rock
CCX090	rock
CCX091	rock
CDC870	rock
LEI769	rock
LEI780	rock
LEI781	rock
LEI782	rock
LEI783	rock
LEI784	rock
LEI785	rock
LEI786	rock
LEI787	rock
LEI788	rock
LEI789	rock
LEQ061	sediment
LEQ062	sediment
LEQ063	sediment
LEQ069	sediment
LEQ070	sediment
LEQ071	sediment
LEQ083	rock
LEQ084	rock
LEQ085	rock
LEQ086	rock
LEQ087	rock
LEQ088	rock
LEQ089	rock
LEQ090	rock
LEQ091	rock
LEQ158	rock
LEQ159	rock
LEQ160	rock
LEQ161	rock
LEQ162	rock
LEQ163	rock
LEQ164	rock
LEQ165	rock
LEQ166	rock
LEQ167	rock
LEQ168	rock
LEQ169	rock
LEQ170	rock
LER103	rock	metamorphic quartzite
LER104	rock	metamorphic quartzite
LER181	rock	sedimentary sandstone
LER182	rock	sedimentary sandstone
LER183	rock	sedimentary siltstone
LER184	rock	sedimentary siltstone
LER818	rock
LER819	rock
LER820	rock
LER821	rock
LER822	rock
LER823	rock
LER824	rock
LER825	rock
LER826	rock
LER827	rock
LER828	rock
LER829	rock
LER830	rock
LER831	rock
LER832	rock
LER833	rock
LFL369	sediment
LFL370	sediment

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"

Database Home

Sample ID	Rock type	Rock name
CCX076	unspecified
CCX091	unspecified
CDC870	unspecified
LEI769	unspecified
LEI780	unspecified
LEI781	unspecified
LEI782	unspecified
LEI783	unspecified
LEI784	unspecified
LEI785	unspecified
LEI786	unspecified
LEI787	unspecified
LEI788	unspecified
LEI789	unspecified
LEQ083	unspecified
LEQ084	unspecified
LEQ085	unspecified
LEQ086	unspecified
LEQ087	unspecified
LEQ088	unspecified
LEQ089	unspecified
LEQ090	unspecified
LEQ091	unspecified
LEQ158	unspecified
LEQ159	unspecified
LEQ160	unspecified
LEQ161	unspecified
LEQ162	unspecified
LEQ163	unspecified
LEQ164	unspecified
LEQ165	unspecified
LEQ166	unspecified
LEQ167	unspecified
LEQ168	unspecified
LEQ169	unspecified
LEQ170	unspecified
LER103	metamorphic	quartzite
LER104	metamorphic	quartzite
LER181	sedimentary	sandstone
LER182	sedimentary	sandstone
LER183	sedimentary	siltstone
LER184	sedimentary	siltstone
LER818	unspecified
LER819	unspecified
LER820	unspecified
LER821	unspecified
LER822	unspecified
LER823	unspecified
LER824	unspecified
LER825	unspecified
LER826	unspecified
LER827	unspecified
LER828	unspecified
LER829	unspecified
LER830	unspecified
LER831	unspecified
LER832	unspecified
LER833	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.

Database Home

Site name	Development	Commodities
Chichagoff Gold Mine	Producer	AU AG PB
Chichagoff	Past Producer	AU PB AG
Tillson Gold Prospect	Occurrence	AU
Young Placer	Prospect	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.

Database Home

Site	Status	Commodities
Unnamed (northeast head of Klag ...	Undetermined	Au
Tillson; Kay; Bahrt	Undetermined	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.

Database Home

Sample ID	Sample source	Sample notes
CCX459	stream/river	stream
LEQ061	stream/river	precious metal mineralization;; streams in Klag Bay, collected by USBM;; stream
LEQ062	stream/river	precious metal mineralization;; streams in Klag Bay, collected by USBM;; stream
LEQ063	stream/river	precious metal mineralization;; streams in Klag Bay, collected by USBM;; stream
LEQ069	stream/river	precious metal mineralization;; Hirst Chichagof 600' el, collected by USBM;; stream
LEQ070	stream/river	precious metal mineralization;; Hirst Chichagof 500' el, collected by USBM;; stream
LEQ071	stream/river	precious metal mineralization;; Hirst Chichagof 475' el, collected by USBM;; 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
CCX661	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.