14-3-014: chromitite - Stillwater District - Mountain View Mine

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Specimen Number14-3-014Alternate NumberSW-8DCommentsChromitite from Peridotite member. Occurs as thin horizons in the olivine chromitite (sample SW-8A); coarse-grained chromite from main ore zone of Mountain View mine. There are 11 chromite cycles within the Peridotite member (A-K), each cycle bounded by olivine chromitite on the footwall and harzburgite (SW-7, SW-8B) on the hanging wall. This sample is from the G-layer, which was the most economic layer for chromite but low in Pt and Pd. Cycles A and K were low in Cr but higher in Pt and Pd (800-1200 ppb Pt + Pd, 1.65 Cr/Fe).In Teaching CollectionNoMineral(s)chromiteRock NamechromititeDistrictStillwaterMineMountain ViewExternal LinkMindatGeo-LocationundefinedSub-LocationundefinedDeposit TypeLayered mafic intrusionGeo-Coords^[1]Reference MaterialACL-171: Gold, D.P., and Mueller, P., eds., 1979, Field Trip Guide to the Stillwater Layered Intrusive Complex, Montana; U.S. Nat'l. Comm. Arch. Geochem., 1979 Ann. Field Conf., Y.B.R.A. Camp, Red Lodge, Montana, August 12-18, 1979, 39 p.

ACL-172: Page, N.J., and Nokleberg, W.J., 1974, Geologic Map of the Stillwater Complex, Montana; Misc. Invest. Ser. Map I-797, Reston, VA.

ACL-225: Howland, A.L., 1955, Chromite Deposits in Central Part Stillwater Complex, Sweet Grass County, Montana; U.S. Geol. Surv. Bull. 1015-D, Washington, D.C., 26 p.

ACL-230: Mertie, J.B., 1969, Economic Geology of the Platinum Metals; U.S. Geol. Surv. Bull. 630, Washington, D.C., 120 p.

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14-3-014: chromitite - Stillwater District - Mountain View Mine

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14-3-014: chromitite - Stillwater District - Mountain View Mine