Deposit: Placer titaniferous magnetite and magnetite probably are derived from the volcanic rocks of the area and are concentrated in black sands along small gullies and rillets. Concentrations of titaniferous sands and gravels occur over an area of several square miles. Samples of titaniferous sands vary widely in tio2 content. One sample from the owner contained 9.4 % tio2 while several grab samples from NBMG. Mines along stream beds assayed less than 3 % tio2. The alluvium in gulches and alluvial fans is not likely to contain more than 1 % tio2. ; info.src : 1 pub lit

Geology: Titaniferous magnetite and magnetite are derived from the volcanic rocks of the area and are concentrated in blacksands along small gullies and rillets, over an area of several square miles

Rock formation(s): Alluvium

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Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Iron

ⓘ Titanium

Mineral List

ⓘ Ilmenite

ⓘ Magnetite

2 valid minerals.

Detailed Mineral List:

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄

List of minerals for each chemical element

O	Oxygen
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Ti	Titanium
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	Iron
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)

Beal, L.H., (1963), Investigation of Titanium Occurrences in Nevada: NBMG, Report 3, 42 Pp.

Other Databases

Link to USGS MRDS:	10068496

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Gridley Lake Ilmenite Placer, Humboldt County, Nevada, USAiRegional Level TypesGridley Lake Ilmenite PlacerPlacer Humboldt CountyCounty NevadaState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }