 | | Report (issue) | | Mineralization of the Florida Mountain Area, Needle Mountains, Southwestern Colorado by , James D. Collier...^Department of Geology Fort Lewis College Durango, Colorado 81301 CONTENTS Abstract......................................................... History of Mining and Exploration........................... Methods...41 41 41 41 43 47 47 51 52 CONTENTS continued Vein mineralization and alteration.....................structures........... Cornucopia, UJC, and LJC Veins.............................. Cornucopia vein............ |  | | Report (volume) | | Potential and Geology of the San Juan National Forest, Colorado Edited by Richard E. Van Loenen and Anthony B...potential and geology of the San Juan National Forest, Colorado I edited by Richard E. Van Loenen and Anthony...: I 19.3.2127 1. Mines and mineral resources--Colorado-San Juan National Forest. I. Van Loenen, Richard...famous mining districts, such as those at Rico and La Plata, but there is no significant mining being...Foley, and Anthony B. Gibbons Exploration and Mining History ...................................... |  | | Report (volume) | | Geology of the Idaho Springs District Clear Creek and Gilpin Counties, Colorado GEOLOGICAL (=) I o 00...of the Idaho Springs District Clear Creek and -i ;i ?i Gilpin Counties, Colorado By ROBERT H. MOENCH and...____ Mines and prospects in the Idaho Springs district ________________ Previous studies.___________...variance in the vein ores.__-____-_-___________-__-.___ Paragenetic sequence of primary vein minerals ____________________...__________.______________ Zonal distribution of vein types _________________________________ Areal z |  | | Journal (volume) | | A. Logan, District Mining Engineer C. Jenkins, Chief Geologist McK. Laizure, District W. Burling...Tucker, Reid J. Mining Engineer District Sampson, Assistant Mining Engineer District Engineer Chas...Chas. V. Averill, District Mining Engineer San Francisco Sacramento San Francisco Los Angeles Los Angeles...Junior Mining Engineer (Librarian) San Francisco San Francisco TABLE OF CONTENTS Page DISTRICT REPORTS...REPORTS OF MINING ENGINEERS—— 7 Redding Field District 7 Sacramento Field District 7 San Francisco |  | | Report (issue) | | Prospects, Idaho Springs District Clear Creek and Gilpin Counties, Colorado Descriptions and Kapa By...Commission Introduction The Idoiho Springs mining district forms an important segment of tae Front Range...hydrothermal ore deposits of early Tertiary a2«_. la is belt, which is about 50 miles long, extends from...west, and southwest. The adjacent Central City district, which produced ores valued at more than $100...clearly the most important district in the mineral belt The Idaho Springs district from 1860 to 1959 produced |
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