Health & Environmental Research Online (HERO)


Print Feedback Export to File
1287280 
Book/Book Chapter 
Geologic and geochemical features of the Redskin Granite and associated rocks, Lake George beryllium area, Colorado 
Hawley, CC; Huffman, C, Jr; Hamilton, JC; Rader, LF, Jr 
1966 
U. S. Geological Survey 
United States (USA) 
C138. 
Precambrian igneous rocks northwest of Lake George, Colo., consist of (1) catazonal Boulder Creek(?) Granodiorite, (2) mesozonal Silver Plume(?) Granite, and (3) epizonal rocks that include gabbro and monzonite, the Pikes Peak Granite, and the Redskin Granite, which is a late intrusive of the Pikes Peak Granite magma series. The Pikes Peak Granite of the area is an alkali granite that contains more than normal amounts of F, Sn, Li, Rb, and Be--a suite of trace elements generally found in greisen ore deposits. The somewhat younger Redskin Granite, which is herein named, has associated beryllium-bearing greisen. It is also an alkali granite that is enriched in F and contains more Sn, Li, Rb, and Be than the Pikes Peak Granite. 
geochronology; granites; dates; major-element analyses; Colorado; Redskin Granite and associated rocks; petrology; Redskin Granite; Redskin Granite and greisen; absolute age; Lake George beryllium area; Pikes Peak Granite; geochemistry; USGS; Park County Colorado; trace-element analyses; igneous rocks; plutonic rocks; United States; (1966)