Limonite

Porphyry copper prospect in Khabarovskiy kray, Russian Federation

Names and other identifiers

GMRAP ID 8332
Alternate names Limonitovoye, Limonitovyj
Tract name Pacific Margin (142pCu8514)
Included sites Amur Projects
Site status prospect

Geographic location

Country Russian Federation
State or province Khabarovskiy kray
Geographic location 139.65, 51.25
Geologic map unit 139.65, 51.25
Nearby data

Geologic information

Deposit type Porphyry copper
Age determination method Geologic inference
Age range Late Jurassic–Cretaceous–Paleogene
Age reference geologic inference
Minerals hematite, limonite
Associated rocks tuffs
Tectonic setting mixed
Stratigraphic age Late Jurassic–Cretaceous–Paleogene

Commodity and development information

Development status Occurrence
Major commodities Cu
Minor commodities Mo
Gold-Moly ratio -9999

Reference information

Comments Classic porphyry copper geochemical and geophysical signature; moderate associated copper anomaly. Potential for supergene enrichment blanket. A 1.5-sq. km leached cap consisting of silicified, sericitized intermediate tuffs containing moderate to intense quartz-limonite stockwork and veinlet fillings, associated with a strong soil and rock-chip Mo anomaly. Sulfides are entirely oxidized within the leach cap, and limonite is locally characterized by hematite boxwork or “relief limonite,” characteristic evidence of leached caps with several cycles of enrichment. The surrounding propylitically-altered rocks are characterized by high Zn-Pb-Mn (Ag-Au) values in both soil and rock samples, forming a classic porphyry-related zoning pattern.
Study area name Northeast Asia
References Rundkvist (2001); Fortress Minerals Corp. (2009)
Site reference Mihalasky, Ludington, Alexeiev, and others (2015)
Fortress Minerals Corp., 2009, Russia focused gold exploration vehicle: Fortress Minerals Corp. presentation, 25 p., accessed January 2012, at http://www.fortressminerals.com/i/pdf/2009-11_FSTP.pdf. (See also http://www.fortressminerals.com/i/maps/Amur_Property_Locations.jpg.)
Rundkvist, D.V., ed., 2001 [2002], Mineragenic map of Russian Federation and adjacent states (with the boundaries of former USSR): Russian Federation Ministry of Natural Resources, State Research and Development Enterprise (Aerogeologica), 49 p., Excel workbook, and 1 map on 18 sheets, scale 1:2,500,000, CD-ROM.