Results 221 to 230 of about 15,774 (268)
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Economic Geology, 1949
Montana pegmatites are of three main age groups: pre-Beltian, both metamorphosed and unmetamorphosed types; Laramide, associated with the Boulder batholith; and Tertiary, related to scattered alkalic stocks and small intrusives. Deposits of sillimanite, kyanite, corundum, mica, fergusonite, and chromite occur with pre-Beltian pegmatites.
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Montana pegmatites are of three main age groups: pre-Beltian, both metamorphosed and unmetamorphosed types; Laramide, associated with the Boulder batholith; and Tertiary, related to scattered alkalic stocks and small intrusives. Deposits of sillimanite, kyanite, corundum, mica, fergusonite, and chromite occur with pre-Beltian pegmatites.
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Northfieldite, pegmatite, and pegmatite schist
American Journal of Science, 1915openaire +1 more source
The Plumbago North pegmatite, Maine, USA: a new potential lithium resource
Mineralium Deposita, 2020W. Simmons, A. Falster, Gary Freeman
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Global lithium resources: Relative importance of pegmatite, brine and other deposits
Ore Geology Reviews, 2012Gregory A Keoleian
exaly
Arabian Journal of Geosciences, 2020
M. Fawzy, N. M. Mahdy, Mabrouk Sami
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M. Fawzy, N. M. Mahdy, Mabrouk Sami
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