Description
Frank Jessup & L.H. Murray
Commodities
PrimarySilver, Gold
TertiaryArsenic, Mercury, Tungsten, Antimony
Deposit
Deposit typevein; some placer
Model{150: Epithermal vein, Comstock}
Deposit sizeS
Orebody formtabular to blanket to irregular
Ore control"Locally, ore occurs in a crushed zone associated with NE-trending faults. In general there are both lithologic and structural controls to mineralization, associated with the more permeable units of the caldera complex and with the caldera ring fracture system. At the North Jessup property ore is controlled by rhyolite plugs."
Materials
Ore mineralsGold, Cerargyrite, Scheelite
GangueQuartz
Geology
Host rockMetavolcanic Rock,Andesite,Rhyolite
Structure"NE-trending faults. Structural deformation in the Jessup area was episodic and controlled mainly by caldera-related structures, which are predominantly normal faults along ring fractures. These structures appear to have been reactivated following lithification of the basin-fill material."
Alteration"There is widespread argillic and limonitic alteration with associated silicification and mineralization. Altered volcanic rocks show characteristically anomalous geochemical signatures in mercury, arsenic, and antimony. Alteration is that typically associated with volcanic-hosted epithermal systems and consists of blanket argillic bleaching with disseminated limonite (pyrite at depth) along a broad arc across the district. All gold mineralization in the district appears to be associated with this regional alteration pattern, which in turn is controlled by both caldera structures and rock permeability. The lapilli tuffs appear to be the most permeable rocks in the area.Alteration and mineralization post-date the rhyolite."
Economic & production
Development statusPast Producer
Production years1908-1940, sporadically
First production1908
Last production1940
Discovery year1908
Identification
Deposit ID10310348
Alternate namesNorth Jessup Property, Central Jessup District, Gold King claim (Central Jessup district), Valley King claims (Central Jessup district), San Jacinto Zone, San Jacinto South Zone, San Jacinto West Zone
RegionNA
Data scoreB
Coordinates39.95795, -118.85988
References
{Deposit:: Vanderburg, W.O., 1940, USBM Information Circular 7093}{Deposit:: NBMG Bull. 83}{Deposit:: USBM, 1979, MILS}{Deposit:: NBMG MI-96, MI-97, MI-98}{Deposit:: Jerry Baughman, oral communication, 1999}{Deposit:: NBMG files,unpublished report, 1992}{Deposit:: Carson Sink Land Status, 1974.}{Deposit:: Long, K.R., DeYoung, J.H., Jr., and Ludington, S.D., 1998, Database of significant deposits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:: NDT Ventures Ltd., press release, 8/21/02.}{Deposit:: Pan-Nevada Gold Corp. website and press releases, 2006.}{Deposit:: Winter, L.D.S., 1992, Geological Report on the Jessup Property Nevada for Southwestern Gold Corporation, unpublished, in NBMG MD File # 2550.}{Deposit:: Baughman, J and Paterson, J., 1992, Drilling Report on the Jessup Property, Churchill County, Nevada, for Southwestern Gold Corporation, unpublished, in NBMG MD File # 2550.}{Deposit:: Americomm press release 1997.}{Deposit:: NDT Ventures website http://www.mininglife.com/operations/operationdetail.asp?Property=Hannah}{Deposit:: Willden, Ronald, and Speed, R.C., 1974, Geology and Mineral Deposits of Churchill County, Nevada: NBMG Bull. 83.Vanderburg, W.O., 1940, USBM Information Circular 7093}