|Quadrangle map, 1:250,000-scale||CY|
|Quadrangle map, 1:63,360-scale||B-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The center of the Ettrain Creek prospect is located in section 3, T. 7 N., R. 32 E., of the Fairbanks Meridian; it is near pingos marked on the 1956 U.S. Geological Survey Charley River B-1 topographic map. The prospect covers about 4 square miles. The location is accurate within 1 mile. This prospect is located within Doyon Limited selected or conveyed land.|
The geology at the Ettrain Creek prospect consists of north-dipping Cambrian through Devonian sedimentary rocks, which include the Jones Ridge, Ogilvie, and Nation River Formations, and the McCann Hill Chert (Miyaoka, 1990). The sequence is exposed within a fenster surrounded by the Jones Ridge Formation (DiMarchi and others, 1993). Nearby northwest-trending thrust faults may be a source of mineralization (Dover and Miyaoka, 1988). Silicification is present as quartz stockwork veining in limestone, and as pervasive chalcedonic quartz replacements in limestone breccias. The silicified breccias locally contain small amounts of iron-oxide gossan. Quartz veins show multiple cross-cutting relationships. Local occurrences of iron-oxide gossan containing black pseudomorphs of cubic and hexagonal minerals were also reported. Rock and soil samples show widespread zinc anomalies and lesser anomalies of other metals (lead, arsenic, copper, antimony, tungsten, and cadmium) (DiMarchi and others, 1993).The Ettrain Creek prospect has been explored by soil and surface sampling since the mid-1970s.
|Geologic map unit||(-141.132406880831, 65.4597414739796)|
|Mineral deposit model||Carbonate-hosted Zn-Cu? (Cox and Singer, 1986; model 32b).|
|Mineral deposit model number||32b?|
|Alteration of deposit||Quartz stockwork veining in limestone and pervasive chalcedonic quartz replacements in limestone breccias are found throughout the prospect. Locally, small amounts of iron-oxide gossan are found in quartz veins, and some black oxides with cubic and hexagonal shapes are found in the gossan (DiMarchi and others, 1993).|
|Workings or exploration||The Ettrain Creek prospect has been soil- and rock-sampled several times since the mid-1970s. In 1993, ASA Inc. conducted a soil and rock sampling program and did some geologic mapping at the prospect. This property lies on Doyon, Limited selected or conveyed land.|
|Indication of production||None|
Additional commentsThis property lies on Doyon, Limited selected or conveyed land. For more information, contact Doyon, Limited.
DiMarchi, J.J., Weglarz, T.B., Adams, D.D., Hubert, J.A., and West, A.W., 1993, 1993 annual report--Reconnaissance program, Doyon option lands: ASA Inc., 120 p. (Report held by Doyon, Limited, Fairbanks, Alaska.)
Dover, J.A., and Miyaoka, R.T., 1988, Reinterpreted geologic map and fossil data, Charley River quadrangle, east-central Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2004, 2 sheets, scale 1:250,000.
|Reporters||C.E. Cameron (ADGGS)|
|Last report date||4/7/2000|