Title: Geology and geochemistry of synsedimentary cobaltiferous-pyrite deposits, Iron Creek, Lemhi County, Idaho
Abstract: 24 Similar ore deposits 24 Metamorphism 25 Resources and exploration 25 Ore genesis 26 References cited 26 Appendix 1. Description of analyzed samples 30 Appendix 2. Methods for geochemical analysis 32 FIGURES 1. Map showing location of Iron Creek area in Idaho cobalt belt 2 2. Map showing generalized geology of Iron Creek area and location of mineralized zones 4 3. Generalized lithologic logs of drill holes through the No-Name deposit showing distribution of disruption zones, cobalt, and copper 7 4. Photographs of drill core from the Yellowjacket Formation showing disruption structures 8 5. Photographs of thin sections showing textures of sedimentary rocks from the Yellowjacket Formation 10 6. Photomicrographs of textures in thin sections of samples from the Yellowjacket Formation 12 7. Scatterplots of geochemical data for the No-Name deposit 22 Contents Ill TABLES 1. Analytical results for samples of drill core from the No-Name deposit 16 2. Summary of analytical results for ore and enclosing wallrocks, No-Name deposit 21 3. Lower limits of determination in geochemical analyses of samples from the