LPH South

Occurrence, Active

Commodities and mineralogy

Main commodities Pb; Zn
Other commodities Ag; Cu
Ore minerals arsenopyrite; chalcopyrite; galena; magnetite; pyrite; pyrrhotite; sphalerite
Gangue minerals chlorite; quartz; sericite

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-1
Latitude 63.2419
Longitude -144.0732
Nearby scientific data Find additional scientific data near this location
Location and accuracy The LPH South prospect is at an elevation of about 7,200 feet about 0.1 mile southeast of peak 7905. It is northeast of the center of section 21, T. 17 N., R. 7 E., in the Copper River Meridian. The location is accurate.

Geologic setting

Geologic description

The LPH South occurrence consists of zinc- and lead-rich massive sulfides about 800 feet above and one-third mile northeast of the PP2 prospect (MH345). Like the nearby LP prospect (MH341), mineralization is in the upper Lagoon unit metavolcanic rocks. Five samples representative of the sulfide variations average 6.1 percent zinc, 4.0 percent lead, 0.2 percent copper, 52 grams of silver per ton, and no gold (Dashevsky and others, 2003).
Geologic map unit (-144.075450008332, 63.2415244163807)
Mineral deposit model Kuroko massive sulfide (Cox and Singer, 1986; model 28a).
Mineral deposit model number 28a
Age of mineralization The Drum unit, which is part of the metamorphic sequence that includes the rocks at this deposit, has been dated at the Devonian-Mississippian boundary on the basis of one SHRIMP U-Pb zircon age of 359 +/- 6 Ma at the nearby DD South prospect (MH325) (Dashevsky and others, 2003).
Alteration of deposit The metavolcanic rocks have been subjected to quartz-sericite-pyrite alteration.

Production and reserves

Workings or exploration Only surface examinations and prospecting has been done at this occurrence.
Indication of production None

Additional comments

Unpublished data cited is available for viewing by contacting Grayd Resources Inc. in Vancouver, B. C., Canada (www.grayd.com), or Northern Associates Inc. in Fairbanks, Alaska.

References