| | Report (volume) | 945-C BERYLLIUM AND TUNGSTEN DEPOSITS OF THE IRON MOUNTAIN DISTRICT SIERRA AND SOCORRO COUNTIES NEW MEXICO...MEXICO BY RICHARD H. JAHNS WITH A SECTION ON THE BERYLLIUM MINERALS BY JEWELL J. GLASS Strategic Minerals........................ Iron-poor silicate rocks........................... Iron-rich silicate rocks: tactites........................................... The beryllium minerals, by Jewell J. Glass............. Helvite..............:... Other beryllium-bearing minerals................... Beryllium deposits.............. | | | Journal (article/letter/editorial) | GEOLOGISTS MAY, 1944 No. ROCK," AN UNUSUAL BEARING RICHARD TACTITE. 3 BERYLLIUM• H. JAHNS. ABSTRACT...ABSTRACT. The beryllium depositsat Iron Mountain, near the northern end of the Sierra Cuchilloin Sierra and...and SocorroCounties,New Mexico, are unusualproductsof contactmetamorphism.They occur in irregular bodiesof...metamorphism took place in mid-Tertiary time. Beryllium is presentchiefly in the complexsilicatemineralshelvite...contacts between recrystallized limestoneand massive magnetite-andraditetactite, chiefly by replacing fluids |
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