Scientific data near [62.36100,-153.87900]

Search area extends approximately 4.5 km east-west and 9.6 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Yukon-Koyukuk	Census area
Alaska	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
McGrath B-2	1:63,360 Alaska quadrangle
McGrath	1:250,000 Alaska quadrangle
Watershed boundaries (USGS hydrologic units)
Farewell Lake	hydrologic unit
190304	hydrologic accounting unit
Yukon	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
Dls	Sedimentary	Limestone of the Mystic structural complex
DSbr	Sedimentary	Barren Ridge Limestone and correlative units
JTrmv	Sedimentary	Tatina River volcanics of Bundtzen and others (1997a) and similar mafic volcanic rocks
PDsc	Sedimentary	Sheep Creek formation of Bundtzen and others (1997a) and correlative siliciclastic units of the Mystic structural complex
Qs	Unconsolidated	Unconsolidated surficial deposits, undivided
Stc	Sedimentary	Terra Cotta Mountains Sandstone
Tev	Igneous - Volcanic	Felsic volcanic rocks of southwest Alaska
Tmv	Igneous - Volcanic	Meshik Volcanics and similar rock units
Tmv	Igneous - Volcanic	Meshik Volcanics and similar rock units
Tmv	Igneous - Volcanic	Meshik Volcanics and similar rock units
Ttk	Sedimentary	Nearshore and nonmarine sedimentary rocks

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
West-Central Alaska	M-D	West-Central Alaska 21360 line km with spacing 9.60 km over parts of AK
Susitna 2012	M-D	Susitna 2012 -9999 line km with spacing 0.80 km over parts of AK
Mc Grath	M/R-D	Mc Grath 2301 line km with spacing 9.60 km over parts of AK
Farewell	M/R/EM-D	Farewell 7187 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-SW19	Sedex Zn-Pb
AK-SW14	Placer Au
AK-SW17	Cu (Au) skarn
AK-SW18	Zn-Pb skarn
AK-SW15	Polymetallic replacement
AK-SW12	Porphyry Cu, BC-Ak type
AK-SW16	Polymetallic vein

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
Farewell-McGrath	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
ACJ158	sediment
ACJ159	sediment
ACJ160	sediment
ACJ161	sediment
ACJ162	sediment
ACJ163	sediment
ACJ619	sediment
M114327	rock	igneous gabbro

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
7013234	1977-08-31	Wet stream 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
3014301	1977-08-31	Stream 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
M114327	igneous	gabbro
M114333	igneous	gabbro

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
Unnamed (northwest of Smith Lake)	Occurrence	CU CO 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 (northwest of Smith Lake...	Inactive	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.

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Sample ID	Sample source	Sample notes
ACG286	stream/river	stream
ACJ158	stream/river	stream
ACJ159	stream/river	stream
ACJ160	stream/river	stream
ACJ161	stream/river	stream
ACJ162	stream/river	stream
ACJ163	stream/river	stream
ACJ619	stream/river	stream
ACJ620	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.

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Tract name	Deposit type	Geology
Yukon-Tanana Upland	porphyry copper	Kluane Arc and Tertiary Kuskokwim Mountains volcanic-plutonic belt (continuation of Canadian Cordilleran continental arc); north of the Denali Fault
Western Alaska Range	porphyry copper	Cretaceous porphyry prospects along the Kahiltna Basin-Peninsula terrane boundary
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.