Cheeney Creek Prospects (Salmon Creek), Clackamas Co., Oregon, USA
Latitude & Longitude (WGS84): | 45° 17' 42'' North , 121° 58' 38'' West |
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Latitude & Longitude (decimal): | 45.295, -121.977222222 |
OREGON METAL MINES HANDBOOK, 1951, ODGMI BULL. 14-D, P. 1 (Nothern Light Mining and Milling Company)
Commodities (Major) - Gold; (Trace) - Zinc, Silver, Lead
Development Status: Producer
Host Rock: Andesite, Sedimentary Breccia
Mineral List
6 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramRegional Geology
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
Miocene 5.333 - 23.03 Ma | Late Western Cascade Volcanics; Rhododendron Formation Age: Miocene (5.333 - 23.03 Ma) Stratigraphic Name: Rhododendron Formation Description: Rhododendron Formation; 500m thick; mudflow breccia Lithology: Major:: {tuff breccia, lithology: andesitic; mineralogy: pyroxene} Minor:: {volcaniclastic sandstone}; Minor:: {siltstone} Reference: R.L. Smith, W.P. Roe (compilers). Oregon Geologic Data Compilation, release 6. State of Oregon Department of Geology and Mineral Industries. [20] |
Tortonian - Aquitanian 7.246 - 23.03 Ma | Hypabyssal intrusive rocks Age: Miocene (7.246 - 23.03 Ma) Description: Hypabyssal, medium-grained, hornblende diorite and quartz diorite in small stocks and large dikes; includes intrusions of medium- to fine-grained gabbro and plugs and small stocks of medium-grained, holocrystalline, olivine andesite. Also includes medium-grained, commonly porphyritic biotite quartz monzonite and leucocratic granodiorite. Many of these intrusive bodies are moderately to intensely propylitized, as are wallrocks they intrude; locally, along shears, the rocks also are sericitized. Potassium-argon ages on several of these shallow intrusions range from about 8 Ma to about 22 Ma (Wise, 1969; Bikerman, 1970; Sutter, 1978; Power and others, 1981a, b; Fiebelkorn and others, 1983) Lithology: Major:{diorite,quartz diorite}, Incidental:{gabbro, quartz monzonite, granodiorite, hypabyssal andesite} Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133] |
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