S/Grok summary note below :"The 2007 USGS Bulletin 2160 (Volume...

S/Grok summary note below :

"The 2007 USGS Bulletin 2160 (Volume 9) on mineral resources in the Mojave National Preserve highlights significant potential for rare earth elements (REEs), gold, tungsten, and other critical minerals across the East Mojave National Scenic Area (EMNSA), particularly in the Clark Mountains, Ivanpah, and near the Colosseum Mine, building on the region's geological similarities to the world-class Mountain Pass REE deposit.pubs.usgs.gov REEs are primarily linked to carbonatite-hosted systems, with Mountain Pass (just outside EMNSA) serving as a benchmark for LREE-enriched (e.g., La, Ce) bastnaesite/parisite mineralization in Proterozoic ultrapotassic rocks, while Clark Mountain and Ivanpah areas show moderate-to-high REE anomalies (e.g., La, Ce, Dy, Yb) in pegmatites and carbonatites, with undiscovered deposit estimates suggesting 1-2 potential sites and thorium associations indicating further exploration value.pubs.usgs.gov Gold resources, exemplified by the Colosseum Mine's breccia-pipe complex (~20 tonnes Au produced, reserves ~9.5 million tonnes at 1.94 g/t Au), involve hydrothermal-magmatic systems with pyrite-hosted gold and zonal arrangements including tungsten veins and silver-copper breccias, potentially superimposed on earlier mineralization episodes.pubs.usgs.gov Tungsten occurs in veins and skarns (e.g., Clark Mountains, Ivanpah), with historical production (e.g., 29,090 kg WO3 concentrates) and models predicting new discoveries up to 0.6% WO3 grades, while other critical minerals like copper, molybdenum, cobalt, and fluorite appear in porphyry, skarn, and polymetallic vein deposits.pubs.usgs.govOverall, the study underscores hydrothermal and carbonatite systems as key for REE and polymetallic potential, with geophysical anomalies supporting deeper exploration in areas like Colosseum, aligning with recent Dateline Resources findings on fenite dykes and Mountain Pass-like signatures for a more varied or extensive REE suite beyond the established gold resource.pubs.usgs.gov"