RN-06 Summary of the Geology, Gold, and Heavy Mineral Placer Deposits of the Iron Springs Divide Area, Moffat County, Colorado

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Research Notes (RN) publications are intended to provide members of the geoscience community with an avenue for publishing independent research and for supporting scientific exchange and the preservation of observations and interpretations. These publications have not been subject to the typical Colorado Geological Survey review process, but submissions are screened for general relevance and basic technical quality. The views, information, or opinions expressed in this publication are solely those of the individual author(s) and do not necessarily represent those of the Colorado Geological Survey, the Colorado School of Mines, or their employees.

This publication provides a summary of the geology, mineral deposits, and mining history of the Iron Springs Divide area in Moffat County. In addition, it contains historical internal CGS reports and documents pertaining to this topic, published here as appendices. Digital PDF download. RN-06D

From the abstract:

Gold placer deposits occur in the Iron Springs Divide area in Moffat County, Colorado. This area contains several historic mining districts including the Fourmile, Lay, and Timberlake Mining District. Placers in these areas contain gold and, in some areas, heavy minerals that contain critical elements. This report provides a summary of the geology, mineral deposits, and mining history of this area. A bibliography and internal Colorado Geological Survey (CGS) historical documents are also included in this document.