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Sampling Gold Lode Deposits, Bluff, Seward Peninsula, Alaska.

PB203664

Publication Date	1971
Personal Author	Mulligan, J. J.; Gnagy, W. L.
Page Count	45
Abstract	The Bureau of Mines sampled a gold-bearing schist series 50 miles east of Nome near Bluff, a dormant mining camp on the southern shore of the Seward Peninsula, Alaska. Gold is unevenly distributed through a section of a schist series that extends from the coast northward 4,500 feet. In this section the schists dip westward 20 to 38 degrees and have an outcrop width of about 1,000 feet and a normal width of about 500 feet. An intensely fractured zone within the schists averages 0.015 to 0.017 ounce of gold and 0.03 to 0.05 ounce of silver per ton for outcrop widths of 200 to almost 500 feet. The grade of the remainder of the schist series ranges downward to scant traces. Gold eroded from these schists collected in solution channels in metalimestones to form the Daniels Creek placers, which also extend from the beach southward under the sea for an unknown distance. The lode sources of the gold placers elsewhere in the southern Seward Peninsula may be similar schists that occupy a similar position in the metasedimentary series. (Author)
Keywords	Mineral deposits Gold Alaska Petrography Placer mining Ore samplings Tables(Data) Bluff(Alaska) Seward Peninsula
Source Agency	Invalid Source Agency Code
NTIS Subject Category	48F - Geology & Geophysics 48A - Mineral Industries
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Report of investigations.
NTIS Issue Number	197123

Sampling Gold Lode Deposits, Bluff, Seward Peninsula, Alaska.

Sampling Gold Lode Deposits, Bluff, Seward Peninsula, Alaska.
PB203664

Publication Date	1971
Personal Author	Mulligan, J. J.; Gnagy, W. L.
Page Count	45
Abstract	The Bureau of Mines sampled a gold-bearing schist series 50 miles east of Nome near Bluff, a dormant mining camp on the southern shore of the Seward Peninsula, Alaska. Gold is unevenly distributed through a section of a schist series that extends from the coast northward 4,500 feet. In this section the schists dip westward 20 to 38 degrees and have an outcrop width of about 1,000 feet and a normal width of about 500 feet. An intensely fractured zone within the schists averages 0.015 to 0.017 ounce of gold and 0.03 to 0.05 ounce of silver per ton for outcrop widths of 200 to almost 500 feet. The grade of the remainder of the schist series ranges downward to scant traces. Gold eroded from these schists collected in solution channels in metalimestones to form the Daniels Creek placers, which also extend from the beach southward under the sea for an unknown distance. The lode sources of the gold placers elsewhere in the southern Seward Peninsula may be similar schists that occupy a similar position in the metasedimentary series. (Author)
Keywords	Mineral deposits Gold Alaska Petrography Placer mining Ore samplings Tables(Data) Bluff(Alaska) Seward Peninsula
Source Agency	Invalid Source Agency Code
NTIS Subject Category	48F - Geology & Geophysics 48A - Mineral Industries
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Report of investigations.
NTIS Issue Number	197123