Scientific data near [47.06000,-92.17000]

Search area extends approximately 1.1 km east-west and 1.6 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Saint Louis	county
Minnesota	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Boulder Lake Reservoir	quadrangle 1:24,000 scale
Hibbing	quadrangle 1:100,000 scale
Hibbing	quadrangle 1:250,000 scale
Watershed boundaries (USGS hydrologic units)
Cloquet	hydrologic unit
St. Louis	hydrologic accounting unit
Western Lake Superior	hydrologic subregion
Great Lakes	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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Unit	State	Lithology
Troctolite	MN	Mesoproterozoic

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
Hibbing	M/R-D	Hibbing 2248 line km with spacing 9.60 km over parts of MN
Northeastern surveys	M-D	Northeastern surveys 100000 line km with spacing 0.40 km over parts of MN

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
LS01	Duluth Cu-Ni-PGE	Middle Proterozoic

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
Mid-continent	Intracontinental rift	Central and Southwest

An index to PGE-Ni-Cr deposits and occurrences in selected mineral-occurrence databases (web-accessible database)

A compendium of references to previously published databases and database records that describe PGE, nickel, and chromium deposits and occurrences. These data show where to obtain more detailed information about each deposit or occurrence.

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Deposit name	Deposit type	Location
Central Boulder Lake	unclassified	Minnesota, United States

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
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.
LS07 - Lake Superior	sediment-hosted stratabound copper	Marine carbonaceous strata of the Mesoproterozoic Nonesuch Formation overlying Mesoproterozoic continental clastic rocks of the Copper Harbor Formation, Midcontinent Rift