Scientific data near [58.31555,-134.36333]

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

Geographic context

Counties, states, countries, continents, or oceans
Juneau	Borough
Alaska	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Juneau B-2	1:63,360 Alaska quadrangle
Juneau	1:250,000 Alaska quadrangle
Watershed boundaries (USGS hydrologic units)
Lynn Canal	hydrologic unit
190103	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
MzPzss	Metamorphic	Metasedimentary and minor metavolcanic rocks along the west side of the Coast plutonic complex of Brew and Morrell (1979b)
MzPzss	Metamorphic	Metasedimentary and minor metavolcanic rocks along the west side of the Coast plutonic complex of Brew and Morrell (1979b)
MzPzsv	Metamorphic	Metavolcanic rocks west of the Coast plutonic complex of Brew and Morrell (1979b)
MzPzsv	Metamorphic	Metavolcanic rocks west of the Coast plutonic complex of Brew and Morrell (1979b)
MzPzsv	Metamorphic	Metavolcanic rocks west of the Coast plutonic complex of Brew and Morrell (1979b)
TKts	Igneous - Plutonic	Foliated tonalite sill of Coast plutonic complex of Brew and Morrell (1979b)
TKts	Igneous - Plutonic	Foliated tonalite sill of Coast plutonic complex of Brew and Morrell (1979b)

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
Juneau '82	M-D	Juneau '82 6598 line km with spacing 1.60 km over parts of AK
Juneau	M/R-D	Juneau 1319 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-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
Taku	Passive margin	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
AGB288	sediment
AGB289	sediment
AGB290	sediment
AGB299	sediment
CFL847	rock	metamorphic phyllite
CFL848	rock	sedimentary carbonate
CFL849	rock	metamorphic unspecified
CFL850	rock	metamorphic phyllite
CFL851	rock
CFL852	rock	metamorphic unspecified
CFT238	rock	igneous intermediate
CFT239	rock	metamorphic phyllite-slate
CFT252	sediment
CGC146	rock	metamorphic metadiorite
CGC147	rock	sedimentary chert
CGC148	rock	metamorphic schist
CGC149	rock	metamorphic metadiorite
CGC150	rock	igneous mafic
CGC151	rock	metamorphic phyllite-slate
CGC152	rock	metamorphic phyllite-slate
CGC153	rock	sedimentary chert
CGC154	rock	sedimentary chert
CGJ229	mineral
CGJ230	mineral
CGJ231	mineral
CGJ232	mineral
CGJ233	mineral
CGJ234	mineral
CGJ235	mineral
CGJ236	mineral
CGJ237	mineral
CGJ238	mineral
CGJ750	concentrate	panned C3 fraction
CGJ751	concentrate	panned C3 fraction
CHX928	rock	metamorphic schist
CHX929	rock	metamorphic amphibolite
M126729	rock	metamorphic gneiss
M126730	rock	metamorphic gneiss
M126739	rock	metamorphic gneiss
M172417	rock	metamorphic phyllite
M172418	rock	metamorphic phyllite
M172419	rock	metamorphic phyllite
M172420	rock	metamorphic unspecified
M172959	rock	metamorphic metamafite
M172960	rock	metamorphic phyllite
M173211	rock	metamorphic schist
M193258	rock
W223197	rock	metamorphic metadiorite
W223198	rock	metamorphic metadiorite

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
CFL847	metamorphic	phyllite-slate
CFL848	sedimentary	carbonate
CFL849	metamorphic	unspecified
CFL850	metamorphic	phyllite-slate
CFL851	unspecified
CFL852	metamorphic	unspecified
CFT237	metamorphic	schist
CFT238	igneous	intermediate
CFT239	metamorphic	phyllite-slate
CGC150	igneous	mafic
CGC151	metamorphic	phyllite-slate
CGC152	metamorphic	phyllite-slate
CGC153	unspecified	chert-jasperoid
CGC154	unspecified	chert-jasperoid
CHX928	metamorphic	schist
M126729	metamorphic	gneiss
M126730	metamorphic	gneiss
M126739	metamorphic	gneiss
M172417	metamorphic	phyllite
M172418	metamorphic	phyllite
M172419	metamorphic	phyllite
M172420	unspecified
M173211	metamorphic	schist
M193258	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.

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Site name	Development	Commodities
Silver Bow Basin Placer	Past Producer	AU
Gold Creek Area	Past Producer	AU
Gold Creek Placers	Producer	AU
Little Basin	Past Producer	AU
Reilly	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.

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Site	Status	Commodities
Middle Basin; Middle Flat	Inactive	Au
Little Basin	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
AGB288	stream/river	stream
AGB289	stream/river	stream
AGB290	stream/river	stream
AGB299	stream/river	stream
CFT252	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
CGJ750	stream/river	Gold Ck #3;; stream
CGJ751	stream/river	Gold Ck #4;; 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.