Geology of the Log Cabin Area, Near Questa Molybdenum Mine, Taos County, New Mexico

altered areas andesite anomaly aplite Basic dikes Bear Canyon Prospects biotite calcic plagioclase chalcopyrite chlorite Corporation of America crystals deposit diabase fault trends feet ferrimolybdite Fluorite formation of ferrimolybdite fractures Geochemical and geologic geologic cross-section gossan grains of magnetite grains of quartz granite stocks hornblende Huebnerite Hydrothermal Alteration Ilsemannite intermediate phase intrusive Ishihara kaolinite latite Log Cabin adit Log Cabin area Log Cabin canyon Log Cabin Fault Log Cabin granite Log Cabin stock m--magnetite magnetite in main main phase mapped marginal molybdenite Molybdenum Corporation molybdenum mineralization MoS2 olivine orthoclase perthite phase of Log phenocrysts Photomicrograph showing coarse Photomicrograph showing grains plagioclase porphyry potash feldspar Precambrian preliminary geochemical survey propylitization pyrite Q--Quartz quartz quartz and plagioclase Red River canyon samples Sangre de Cristo saussuritized Schilling 1956 sericite shears showing coarse grains soil enrichment Subhedral Sulphur Gulch stock SW dip Taos County Tertiary Titley unaltered volcanics vein mineral Yarma Gulch