Mine detail: OCI

Previously called 'Big Island Plant, Green River Stauffer Mine, Stauffer TronaStauffer, Big Island Mine, Big Island Mine and Plant'

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Location

Lat / long:

41.71772, -109.69268

Resource(N)

Primary:	Sodium Carbonate
Secondary:	Sodium
Tertiary:	Halite, Oil Shale
Ore:	Trona, Halite
Gangue:	Calcite, Dolomite, Gaylussite, Nahcolite
Orebody form:	CIRCULAR: TABULAR
Other material:	Oil Shale
Discovery year:	1938

Production

Operation type:	Underground
Deposit type:	Evaporite
Production size:	Large
Development status:	Producer
First production started:	1962

Geology

Host rock:	Green River, Wilkins Peak Member: Trona And Evaporite Bearing Strata
Host type:	Evaporite
Structure:	Basin And Range Province; Green River Basin; East Of Overthrust Belt, South Of Wind River Mts., Rock Springs Uplift, East Of Trona Area, Stratigraphic High During Much Of Green River Fm. Depositional Period. It Created A Barrier Restricting Water Circulation And Aiding Evaporite Precipitation.
Alteration processes:	Trona May Be In Part A Diagenetic Product Of Reaction Between Evaporite Minerals And Na-Rich Water From The Weathering Of Andesitic Tuffs Of Green River Formation. Geochemical Studies (Parker, Et Al, 1971) Have Shown That The Green River Was Probably A Source Of Na-Rich Water. Solution Activity And Reorganization Of Material Is Evident Including Enlarged Grainsize And Secondary Redeposition Of Trona (Parker, Et Al, 1971).

References

MRDS	W031827
MAS	560370025
DEP	10107384
Reference	{Deposit:: USBM MINERALS YEARBOOK 1978-79.}{Deposit:: PARKER, R.B.,1971, CONTRIBUTIONS TO GEOLOGY, TRONA ISSUE, UNIV. OF WYOMING, V. 10, N. 1.}{Deposit:: Mining Magazine, January 1989, p. 45.}{Deposit:: Bradley, W.H., and Eugster, H.P., 1969, Geochemistry and paleolimnology of the trona deposits and associated authigenic minerals of the Green River Formation of Wyoming: U.S. Geological Survey Professional Paper 496B, 71 p.}{Deposit:: CAMERON ENGINEERS,WYO MINERAL IND REVIEW & FORECAST,1969. [from deleted MAS record 0560370025].}{Reference:: Incomplete record 10279285 (0560370522) Stauffer Trona by South Dakota School of Mines and Technology WDW 23-nov-1983, USBM [sic] refreences WYO GEOL SURV OPEN FILES. Record deleted.}
Reporter	Intermountain Field Operations Center (IFOC), Beougher, Delilah J. (Spanski, Gregory T.), South Dakota School of Mines and Technology WDW, Sutphin, David M.