| 词条 | Holkham Bay |
| 释义 |
Holkham Bay (also known as Sumdum Bay)[1] is a bay in Alaska, known for the Tracy Arm. Gold was mined from quartz veins found in the black graphite slate. The Sumdum Mine is located 2.5 miles south of Sanford Cove. Two ledges constitute the Sumdum Chief and Bald Eagle Mines and "have been mined to a depth of several hundred feet below their surface outcrops." Supporting structures included a 10-stamp mill, 4 large Frue Vanners, 2 Pelton wheels, a wagon road, a short tramway, and a wharf.[2] Gold was mined by the Portland Group from a silicious schist ore body containing gold-bearing pyrite, galena, and sphalerite.[2] See also
References1. ^{{cite book|author=United States. Census Office|title=Report on the Population and Resources of Alaska at the 11th Census, 1890|url=https://books.google.com/books?id=0uO9Yud_W4AC&pg=PA47|accessdate=6 February 2013|edition=Public domain|year=1893|publisher=U.S. Government Printing Office|pages=47–}} {{coord|57.748694|N|133.629999|W|display=title}}2. ^1 {{Cite book |author=Arthur C. Spencer |title=The Juneau Gold Belt, Alaska, USGS Bulletin No. 287 |publisher=United States Government Printing Office |year=1906 |pages=43–45}} 3 : Bays of Alaska|Bays of Hoonah–Angoon Census Area, Alaska|Bodies of water of Juneau, Alaska |
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