|Quadrangle map, 1:250,000-scale||EA|
|Quadrangle map, 1:63,360-scale||A-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Tweeden prospect is near the mouth of Gold Creek, at the base of the slope on the north side of Gold Creek, approximately one-half mile upstream of the mouth of the creek. It is in the NW1/4 section 19, T. 27 N., R. 16 E., of the Copper River Meridian. The location is accurate within one-half mile. The Tweeden prospect is locality 11 of Cobb (1972 [MF-393]) and locality 58 of Eberlein and others (1977).|
Geologic descriptionThe Tweeden prospect is located near the mouth of Gold Creek, where a cliff of Paleozoic greenstone has quartz veins and stringers oriented along along the cleavage; these veins are iron-stained and contain gold (Porter, 1912). Along the lower 4 miles of Gold Creek, Tertiary or Mesozoic granitic rocks crop out (Foster, 1976). In 1911, development at the Tweeden prospect consisted of excavating a 40-foot tunnel at the base of the cliff (Porter, 1912). Operations were discontinued that year when the owner was unable to recover the gold which was very fine.
|Geologic map unit||(-142.355979080027, 64.10916476354)|
|Workings or exploration||In 1911, development at the Tweeden prospect consisted of excavating a 40-foot tunnel at the base of the cliff (Porter, 1912). Operations were discontinued that year when the owner was unable to recover the gold which was very fine.|
|Indication of production||None|
Cobb, E.H., 1972, Metallic mineral resources map of the Eagle quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-393, 1:250,000 scale, 1 sheet.
Cobb, E.H., 1977, Summary of references to mineral occurrences in the Eagle quadrangle, Alaska: U.S. Geological Survey Open-File Report 77-845, 122 p.
Eberlein, G.D., Chapman, R.M., Foster, H.L., and Gassaway, J.S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open-File Report 77-168-D, 132 p., 1 sheet, scale 1:1,000,000.
Foster, H.L., 1976, Geologic map of the Eagle quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series, Map 922, 1 sheet, scale 1:250,000.
|Reporters||R.L. Flynn; M.B. Werdon|
|Last report date||5/1/2002|