Scientific data near [64.03800,-148.54400]

Search area extends approximately 4.5 km east-west and 10.2 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Denali	Borough
Alaska	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Fairbanks A-4	1:63,360 Alaska quadrangle
Fairbanks	1:250,000 Alaska quadrangle
Watershed boundaries (USGS hydrologic units)
Tanana Flats	hydrologic unit
190405	hydrologic accounting unit
Southwest Alaska	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
MDts	Metamorphic	Totatlanika Schist
Qs	Unconsolidated	Unconsolidated surficial deposits, undivided
Qs	Unconsolidated	Unconsolidated surficial deposits, undivided
Tcb	Sedimentary	Coal-bearing 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
Big Delta-Fairbanks	M-Dz	Big Delta-Fairbanks 25749 line km with spacing 1.20 km over parts of AK
Big Delta-Fairbanks	M-Dz	Big Delta-Fairbanks 25749 line km with spacing 1.20 km over parts of AK
Fairbanks	M/R-D	Fairbanks 2035 line km with spacing 9.60 km over parts of AK
Liberty Bell	M/EM-D	Liberty Bell 2023 line km with spacing 0.40 km over parts of AK
East Alaska Range	M-Dz	East Alaska Range 43452 line km with spacing 1.20 km over parts of AK
East Alaska Range	M-Dz	East Alaska Range 43452 line km with spacing 1.20 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-SC20	Porphyry Cu, BC-Ak type
AK-SC24	Plutonic porphyry Au
AK-SC07	Au-Sb veins
AK-SC14	Kuroko massive sulfide
AK-SC27	Polymetallic vein
AK-SC08	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
Yukon-Tanana lower	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
CGL600	rock	metamorphic schist
CGL651	rock	metamorphic schist
CGW594	mineral
CGW595	mineral
CGW596	mineral
CGW597	mineral
CGW598	mineral
CGW599	mineral
CGW600	mineral
CGW601	mineral
CGW602	mineral
CGW603	mineral
CGW604	mineral
CHA496	concentrate	panned C3 fraction

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
7026361	1977-06-24	Wet stream sediment sample dried at less than or equal to 100øC and sieved to -100 mesh through stainless steel sieves.
7026362	1977-06-24	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
3028084	1977-06-24	Stream water sample acidified to a pH of less than or equal to 1 with reagent-grade nitric acid.
3028085	1977-06-24	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
CGL600	metamorphic	schist
CGL651	metamorphic	schist

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
Fourth of July Creek	Past Producer	AU AG PB SB
Totatlanika River	Past Producer	AU AG
Fourth of July Creek	Past Producer	SB AU PB AG
Unnamed (head of Fourth of July Creek)	Occurrence	SB

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 (head of Fourth of July ...	Inactive	Sb
Fourth of July Creek; July Creek	Inactive	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
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
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.