Description
Mountain Fuel Supply Co.
Commodities
PrimarySoda Ash, Sodium Carbonate
TertiaryOil Shale
Commodity typeN
Deposit
Deposit typeEvaporite
Deposit sizeL
WorkingsUnderground
Orebody formTABULAR: BLANKET
Ore controlChemical Precipitation From Waters Of 15,000 Sq. Mi. Lake Gosuite During One Million Yr. Period Of Aridity And Restricted Circulation.
Materials
Ore mineralsTrona
GangueCalcite, Dolomite, Gaylussite, Shortite, Northupite, Pirssonite, Nahcolite, Wegscheiderite
Geology
Host rockEvaporite · Green River, Wilkins Peak Member: Trona And Evaporite Bearing Strata
StructureRock 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., Basin And Range Province; Green River Basin; East Of Overthrust Belt, South Of Wind River Mountains.
AlterationTrona 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).
Economic & production
Development statusProducer
First production1952
Discovery year1938
Identification
Deposit ID10080547
MRDS IDW031825
Alternate namesIntermountain Chemical Co. Mine, FMC Westvaco No 6 Mine, FMC Westvaco Mine #1, #2, Green River FMC Mine, FMC Westvaco MillFMC Westvaco Mine, Westvaco Mine and Facility (FMC), Green River Trona DistrictWestvaco Mine, Westvaco Mine (FMC), FMC Green River Trona Mine
RegionNA
Data scoreB
Coordinates41.62031, -109.80954
References
PARKER, R.B, ed., 1971, Contribuitions to Geology--Trona Issue: Larmie, Wyoming, Univ. of Wyoming, v. 10, no. 1, p. 1-72.Wigg, Grundy, and Dynni, 1995, Trona resources in the Green river basin, southwest Wyoming: USGS OFR 95-476, 88 p.WYO GEOL SURV OPEN FILES [newMRDS 10133390, MAS 0560370519]FAHEY, J.J., 1962, Saline minerals of the Green River Formation: USGS Professional Paper 405, 50 p.Bradley, W.H., and Eugster, H.P., 1969, USGS Professional Paper 496B, p. 9, 17, 35.Dyni, J.R., and Jones, R.W., eds., 1998, Proceedings of the First International Soda Ash Conference, Vol. II: Wyoming State Geological Survey Public Information Circular No. 40, 215 p.CAMERON ENGINEERS WYO MINE FORECAST 1969Mining Magazine, Jan. 1989, p. 45.