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Oronogo Circle Mine, Oronogo Field, Tri-State District, Jasper Co., Missouri, USA

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Latitude & Longitude (WGS84): 37° 11' 25'' North , 94° 28' 26'' West
Latitude & Longitude (decimal): 37.1905196452, -94.4739923477
Other regions containing this locality:North America

A former Pb-Zn occurrence/mine located in sec. 36, T29N, R33W, 5th Principal meridian, at Oronogo near Webb City. Owned by Carl McDonald (60%), Missouri (1976); City of Oronogo (40%) (1976). MRDS database stated accuracy for this location is 100 meters.

The ore body is 5 meters thick, 200 meters wide, 500 meters long, with a depth-to-top of 40 meters. Ore body No. 1 is tabular and breccia fill. Ore body No. 2 is disseminated. Ore body No. 3 is a replacement body. The primary mode of origin was hydrothermal activity. Primary ore control was fracturing. Secondary control was a contact zone. Wallrock alteration is intense (silicification, dolomitization). Local rocks include Meramecian series (Phanerozoic-Paleozoic-Carboniferous-Mississippian-Late [Meramecian]; Riverton Formation, Burgner Formation.

Workings include unspecified surface and underground openings (the topo map reflects a body of water at this point indicating a large, former open cast mine.

Mineral List

11 valid minerals.

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Rocks & Minerals (1939): 14: 36.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10147309 & 10243906.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0290970040 & 0290971380.

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