St. Louis Paper - October, 1917 - Ore Deposits of the Boulder Batholith of Montana (with Discussion)
- Organization:
- The American Institute of Mining, Metallurgical, and Petroleum Engineers
- Pages:
- 85
- File Size:
- 3555 KB
- Publication Date:
- Jan 1, 1918
Abstract
A. Introduction. 1. Association of Ores and Igneous Rocks. 2. Identity of Granite Rocks. B. General Geology. 1. Geologic Events of the Igneous Cycle. 2. Association of Igneous Intrusions with Tectonic Forces. C. Igneous Rocks. 1. Andesite Period. 2. Granite Period. (a) Diorite. (b) Quartz-Monzonite. (c) Aplite. (d) Quartz-Porphyry. (c) Quartz-Veins. 3. Rhyolite Period. 4. Comparative Analyses. D. Classification of Deposits. 1. Genetic Classification. 2. Parallelism Between Igneous Stages and Stages of Ore Deposition. Part 2.—The Ore Deposits Andesite Period. A. Andesite Phase. 1. Disseminations—Baggs Creek. 2. Contact Deposits—Iron Mines of Ekhorn Mountains. 3. Fissure Veins—Emery District. (a) Fissure Veins in Andesite Walls. (b) Mineralization Along Bedding of Flows. (c) Mineralization of Amygdaloidal Lavas. (d) Mineralization of Breccia. 4. Summary.
Citation
APA: (1918) St. Louis Paper - October, 1917 - Ore Deposits of the Boulder Batholith of Montana (with Discussion)
MLA: St. Louis Paper - October, 1917 - Ore Deposits of the Boulder Batholith of Montana (with Discussion). The American Institute of Mining, Metallurgical, and Petroleum Engineers, 1918.