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Abstract
The Red Mountain district in southwestern Colorado produced base and precious metals hosted in breccia pipes and vein structures related to an extensive lithocap that overlies pervasive quartz-sericite-pyrite alteration. A helicopter-borne time-domain electromagnetic survey flown over the district yielded resistivity values that range from tens to thousand or more ohm-m, with lesser resistivity values in the lithocap and greater resistivity values in the rocks with propylitic alteration. A 60 m-thick, low resistivity zone subparallel to topography characterizes the magmatic-hydrothermal breccia pipes. A broad zone of low resistivity that may envelope epithermal deposits spans multiple flight lines and occurs beneath rocks with argillic alteration. A 50 m-thick low resistivity zone occurs beneath quartz-sericite-pyrite alteration and may indicate porphyry deposit at depth.
Study Area
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Resistivity imaging over porphyry copper systems in the Red Mountain district, southwest Colorado, USA |
| Volume | 3 |
| Year Published | 2023 |
| Language | English |
| Publisher | Society for Geology Applied to Mineral Deposits |
| Contributing office(s) | Geology, Geophysics, and Geochemistry Science Center |
| Description | 4 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | Proceedings of the 17th SGA biennial meeting |
| First page | 343 |
| Last page | 346 |
| Conference Title | 17th Biennial SGA Meeting |
| Conference Location | Zurich, Switzerland |
| Conference Date | August 28 - September 1, 2023 |
| Country | United States |
| State | Colorado |
| Other Geospatial | Red Mountain district, Silverton caldera |
| Google Analytic Metrics | Metrics page |