| Lat / long: | 39.95795, -118.85988 |
| Primary: | Gold, Silver |
| Tertiary: | Antimony, Tungsten, Mercury, Arsenic |
| Ore: | Gold, Cerargyrite, Scheelite |
| Gangue: | Quartz |
| Orebody form: | tabular to blanket to irregular |
| Discovery year: | 1908 |
| Operation type: | Surface-Underground |
| Deposit type: | vein; some placer |
| Production size: | Small |
| Development status: | Past Producer |
| Production years: | 1908-1940, sporadically |
| First production started: | 1908 |
| Last production ended: | 1940 |
| Host type: | Metavolcanic 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 processes: | 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. |
| DEP | 10310348 |
| Reference | {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MILS}{Deposit:: NBMG MI-96, MI-97, MI-98}{Deposit:: Jerry Baughman, oral communication, 1999}{Deposit:: NBMG files,unpublished report, 1992}{Deposit:: Carson Sink Land Status, 1974.}{Deposit:: Long, K.R., DeYoung, J.H., Jr., and Ludington, S.D., 1998, Database of significant deposits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} |
| Reporter | La Pointe, D. D., Schruben, Paul G. |