|Quadrangle map, 1:250,000-scale||MH|
|Quadrangle map, 1:63,360-scale||B-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The PP Diatreme prospect is at an elevation of 5,200 feet, about midway between Broxson Gulch and lower Eureka Glacier. It is on the east side of a southeast-flowing tributary to Eureka Creek that is locally called Landslide Creek (a name not shown on the 1978 edition of the B-5 topographic map). The prospect is in the NW1/4NE1/4 section 32, T. 18 S., R 8 E., Fairbanks Meridian.|
The rock in the area of this prospect consists mainly of Upper Triassic gabbro and serpentinized dunite that are part of a sill that can be traced for more than 5 miles (Rose, 1966 [ADMM GR 20, figure 3]). The sill intrudes Upper Paleozoic metasedimentary rocks and is part of the Eureka ultramafic complex (Nokleberg and others, 1991; W.T. Ellis, oral communication, 1996).The mineralized material is a brecciated diatreme that cuts Upper Paleozoic metasedimentary rock. No sulfides were noted, but there is strong iron staining, and platinum and palladium values are anomalous (794 parts per billion (ppb) platinum and palladium; W.T. Ellis, oral communication, 1996). A sample from this prospect contained 37 ppb gold, 261 ppb platinum, and 533 ppb palladium (W.T. Ellis, oral communication, 2001). The prospect is about 150 south of (below) the north-dipping ultramafic sill that hosts the West Crash prospect (MH110).
|Geologic map unit||(-146.249764898971, 63.3154771729471)|
|Mineral deposit model||Differentiated mafic-ultramafic sill-form Ni-Cu-PGE.|
|Age of mineralization||Probably Late Triassic.|
|Alteration of deposit||Moderate to strong serpentinization.|
|Workings or exploration||The prospect is on active MAN Resources claims. An anomalous sample from this site contains contained 37 ppb gold, 261 ppb platinum, and 533 ppb palladium (W.T. Ellis, oral communication, 2001).|
|Indication of production||None|
Nokleberg, W.J., Lange, I.M., Roback, R.C., Yeend, Warren, and Silva, S.R., 1991, Map showing locations of metalliferous lode and placer mineral occurrences, mineral deposits, prospects, and mines, Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-C, 42 p., 1 sheet, scale 1:250,000.
|Reporters||W.T. Ellis (Alaska Earth Sciences), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)|
|Last report date||8/19/2002|