Large mass of igneous rock in Montana, containing metal ore deposits
Stillwater igneous complex around Mouat chromite mineChromitite with bronzite phenocrysts from Stillwater Igneous ComplexSulfidic serpentintite, platinum-palladium ore from the Stillwater Mine. This is an altered pegmatitic dunite very richly infused with intercumulate Pt/Pd-rich chalcopyrite & pyrrhotite (golden metallic minerals). In this sample, the blackish areas are serpentine masses (formerly large olivine crystals). Some magnetite is also mixed in with the serpentine. Ore grade is about 2.5 ounces of Pd-Pt per ton of rock, with a Pd-Pt ratio of about 3:1.
The Stillwater igneous complex is a large layered mafic intrusion (LMI) located in southern Montana in Stillwater, Sweet Grass and Park Counties. The complex is exposed across 30 miles (48 km) of the north flank of the Beartooth Mountain Range. The complex has extensive reserves of chromium ore and has a history of being mined for chromium. More recent mining activity has produced palladium and other platinum group elements.[1]
^The Stillwater Complex: A review of the geology by I. S. McCallum http://serc.carleton.edu/files/NAGTWorkshops/petrology03/McCallum.Stillwater.doc
and 28 Related for: Stillwater igneous complex information
The Bushveld IgneousComplex (BIC) is the largest layered igneous intrusion within the Earth's crust. It has been tilted and eroded forming the outcrops...
the mineral and chromitite, a rock containing chromite). The StillwaterIgneousComplex in Montana also contains significant chromite. Chromite suitable...
intrusions such as the Bushveld Igneous Complex in South Africa, the Stillwaterigneouscomplex in Montana and the Ring of Fire discovery in Ontario. Chromitite...
Igneous textures include the rock textures occurring in igneous rocks. Igneous textures are used by geologists in determining the mode of origin of igneous...
olivinite (not to be confused with the mineral olivenite), is an intrusive igneous rock of ultramafic composition and with phaneritic (coarse-grained) texture...
(platinum group metals or PGMs) from a geological formation in the Stillwaterigneouscomplex in south central Montana known as the J-M Reef and from the recycling...
magmatic sulfide deposit of northern Labrador, the Stillwaterigneouscomplex of Montana, the Duluth Complex of the North American Midcontinent Rift, and the...
of bronzite composition, is noted in the cumulate rocks of the Stillwaterigneouscomplex of Montana. Bronzite is sometimes cut and polished, usually in...
segregations in layered igneous intrusions such as Bushveld, the Stillwaterigneouscomplex, the Lac des Îles igneouscomplex, the island of Rùm intrusive...
Bushveld complex, is the world's largest producer of platinum, followed by Russia. Platinum and palladium are also mined commercially from the Stillwater igneous...
Stillwaterite was first discovered in the Banded and Upper zones of the Stillwaterigneouscomplex in Montana, United States, and has been reported in the Lac-des-Iles...
the norite belt of the Bushveld IgneousComplex covering the Transvaal Basin in South Africa; the StillwaterComplex in Montana, United States; the Sudbury...
addition to the discovery locality, it has been reported from the Stillwaterigneouscomplex in Montana and the New Rambler copper–nickel mine in the Medicine...
Bushveld complex of South Africa. It is also found in Isa Valley, Western Australia. In the US it is found in the Stillwaterigneouscomplex of Montana;...
cumulate harzburgite is the Stillwaterigneouscomplex of Montana, U.S.A. It is also found in the Bushveld IgneousComplex, a large layered intrusion in...
be found on the north shore of Lake Superior. In Montana, the Stillwaterigneouscomplex is a prominent location for the mineral. Lizardite has a type...
years old, making these rocks among the oldest on Earth. The Stillwaterigneouscomplex within the mountains is the location of the largest known deposits...
Gold is also produced from three platinum mines in the Stillwaterigneouscomplex: the Stillwater mine, the Lodestar mine, and the East Boulder Project...
corner of the state, and by two platinum mines in the Stillwaterigneouscomplex: the Stillwater mine and the East Boulder project. The first commercial...
Gabbro (/ˈɡæb.roʊ/) is a phaneritic (coarse-grained), mafic intrusive igneous rock formed from the slow cooling of magnesium-rich and iron-rich magma...
Skaergaard intrusion of east Greenland Stillwaterigneouscomplex, southwestern Montana, United States Trompsburg complex, South Africa Windimurra intrusion...
that since 1993 operated the Lac des Iles mine in the Lac des Îles igneouscomplex of the Thunder Bay District of Ontario. The company primarily mined...
and granite. The StillwaterComplex, by contrast, is made up of ultrabasic igneous rocks exposed at the surface in Park, Stillwater, and Sweet Grass Counties...
Malanjkhand copper-molybdenum deposit, Madhya Pradesh, India; and the Stillwaterigneouscomplex in Montana, US. Mooihoekite occurs in association with haycockite...
Global Information
