Mine detail: Midway Gold Deposit

Lat / long:

38.24494, -117.08313

Host rock:	Tombstone Formation, Palmetto Formation, Red Mountain
Host type:	Rhyolite,Tuff,Mixed Clastic/Volcanic Rock,Argillite,Trachyandesite
Structure:	Minor east-northeast trending faults with minimal displacements are mapped in the area., Midway lies east of the Walker Lane, a prominent zone of parallel and sub-parallel right lateral strike slip faults,a major structure that separates the Sierra Nevada batholith from the Basin and Range Province; regional extensional Basin and Range type faulting
Alteration processes:	Rhyolite host rock is altered, silicified. Northwest-trending, sub-vertical rhyolite porphyry dikes that intrude the Palmetto Formation and overlying Rye Patch Formation at Midway are pervasively propylitized with local sericitic and phyllic hydrothermal alteration . Small amounts of pyrite and chalcopyrite occur in the dike rock.

MRDS	M231771
DEP	10310416
Reference	{Deposit:: Kleinhampl, F.J. And Ziony, J.I., 1994, Geology and Mineral Deposits of Northern Nye Co.,NBMG Bulletins 99A & 99B.}{Deposit:: Mining Record 3/12/97}{Deposit:: Long, K.R., DeYoung, J.H., Jr., and Ludington, S.D., 1998, Database of significant deposits of gold, silver, copper, lead, and zinc in the United States; Part A, Database description and analysis; part B, Digital database: U.S. Geological Survey Open-File Report 98-206, 33 p., one 3.5 inch diskette.}{Deposit:: NBMG MI-2002}{Deposit:: NBMG MI-97}{Deposit:: Amer. Mines (1998), 1997}{Deposit:: International Mining News, 12 Mar 1997}{Deposit:: Bonham and Garfield, 1979, p.31}{Deposit:: Geoffrey Goodall, 2003, Exploration Summary of the Midway Gold Prospect, Nye County, Nevada; Geological Society of Nevada Special Publication No. 37, Spring 2003 Field Trip Guidebook, Gold Deposits of the Goldfield, Midway and Thunder Mountain Areas.}{Deposit:: Seabridge Gold Inc.,}{Deposit:: press releases, 10/24/02, 12/23/02.}
Reporter	LaPointe, D.D., Schruben, Paul G.