 | Staatz, M.H., Page, L.R., Norton, J.J., Wilmarth, V.R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. Professional Paper 297c. US Geological Survey doi:10.3133/pp297c | Report (issue) | | at the Helen Beryl, Elkhorn and Tin Mountain Pegmatites Custer County, South Dakota GEOLOGICAL SURVEY...at the Helen Beryl, Elkhorn and Tin Mountain Pegmatites Custer County, South Dakota By MORTIMER H. STAATZ...PAGE, JAMES VERL R. WILMARTH J. NORTON, and PEGMATITES AND OTHER PRECAMBRIAN ROCKS IN THE SOUTHERN BLACK..._________________ _ Tonnage of beryl-bearing units __________________ _ Grade ________________________________________...used in determining grade ___________________________________ _ Helen Beryl pegmatite _____________________________ |  | | Report (issue) | | GEOLOGICAL SURVEY CIRCULAR 245 GEOLOGY AND PEGMATITES OF PART OF THE FOURMILE AREA CUSTER COUNTY SOUTH... GEOLOGICAL SURVEY CIRCULAR 245 GEOLOGY AND PEGMATITES OF PART OF THE FOURMILE AREA CUSTER COUNTY, SOUTH...Descriptive geology.......................... Metamorphic rocks..................... Quartz-mica schist...dikes ................ Pegmatites............................ Homogeneous pegmatites .......... Heterogeneous...Heterogeneous pegmatites.......... Quartz veins .......................... Sedimentary rocks ............... |  | | Report (issue) | | Pegmatite Investigations 1942-1945 Black Hills, South Dakota By LINCOLN R. PAGE and OTHERS GEOLOGICAL...geology____________________________________ Metamorphic rocks.____________________________ Igneous r...____________ Harney Peak granite.__--__--_--____________ Pegmatites _ _____-_-__------__-____,____ Distribution ...sequence____-_--_--________-_____ Relation of pegmatites to the structure of the wall rocks__________________________...pocket] PLATE 1. Index map showing locations of pegmatite mines and prospects. 2. 3. 4. 5. 6. 7. 8. 9. |  | | Report (issue) | | Geology and Mineral Deposits of Some Pegmatites in the Southern Black Hills South Dakota GEOLOGICAL SURVEY...Some Pegmatites in the Southern Black Hills South Dakota By JAMES J. NORTON and others PEGMATITES AND...geology_____________________________.______ Zoned pegmatites.__________________________________ Mineral deposits...mine___--_____________________ Dan Patch West pegmatite._________________________ Diamond Mica prospect...Buster Dike pegmatite. Geologic maps, Etta pegmatite. Geologic map and sections, Eureka pegmatite. Geologic |  | | Report (issue) | | Pegmatite Investigations 1942-45 New England By EUGENE N. CAMERON and OTHERS GEOLOGICAL SURVEY PROFESSIONAL...______________________________________ _ Location of pegmatite districts ___________________ _ Previous work...Acknowledgments ______________________________ _ History of pegmatite mining inN ew England _______ _ Mica mining _..._______________________ _ Geology of the pegmatite districts of Maine __ :. . _____ _ Metamorphic rocks _________________________...______________________________ _ Pegmatites ________________________________ _ Geology of the pegmatite districts of New |  | | Report (issue) | | Geology of the Hugo Pegmatite Keystone, South Dakota GEOLOGICAL SURVEY PROFESSIONAL PAPER 297-B Geology...Hugo Pegmatite Keystone, South Dakota By J. J. NORTON, L. R. PAGE, and D. A. BROBST PEGMATITES AND OTHER...detailed structural and petrologic study of a pegmatite containing seven zones and two replacement bodies...__________ Metamorphic rocks_ ____________________________ Roy and Monte Carlo pegmatites.- _ __---__-______..._______________ Pegmatite units ____________________________________ Zone 1 : Albite-quartz-musco vite |  | | Journal (article/letter/editorial) | | Crystallization of the Little Three layered pegmatite-aplite dike, Ramona District, California Received:...March 1999 Abstract Subhorizontally layered pegmatite-aplite bodies are characterized by ®ne-grained...much coarser-grained, commonly graphic potassic pegmatite. Although well studied, there currently is little...miarolitic pockets near the base of the graphic pegmatite zone. Tourmaline, garnet, biotite, and muscovite...there any indication that the aplite, graphic pegmatite, or miarolitic pockets represent separate magma |  | | Book | | to Scissors C rossing via Highway 78 down Banner Grade • Scissors Crossing to Ocotillo via Highway S-2.... . . . . . . . . . . . 25 Garnet-Bearing Granitoids and Pegmatite Dikes in the Indian Hill-Tule Mountain...Pendant : Implications fo r the Origin of Gem-Bearing Pegn1atites in Southern Californi a .............Penetrating Radar (GPR) at the Cryo-Genie Gem Pegmatite Mine, San Diego County, California .............Kenneth C. Schulle I 'll The En1placement of the Pegmatite Fields of San Diego and Riverside Counties: A |  | | Journal (issue) | | Mineralogy and paragenesis of the Little Three mine pegmatites, Ramona district, San Diego County, California...EPSR (electron paramagnetic spin resonance), HRTEM (high-resolution transmission electron microscopy), SIMS...Mastering these new techniques is no small task, and the high level of sophistication tends to make the older...later. If a mineral cannot be identified with a high degree of certainty by visual inspection using either...Montreal, Quebec, Canada H3A 2A7 he Little Three pegmatites have yielded superb orange large blue topaz c |  | | Report (issue) | | Wright _____ _ 4. Relation of the Colorado mineral belt to Precambrian structure, by Ogden Tweto and P....______ _ :.. ___________________ - _-27. Metamorphic grade and the abundance of Th0 2 in monazite, by...Montana, by Roger W. Swanson ____________ _ Hugo pegmatite, Keystone, South Dakota, by J. J. Norton-----...------------------------------35. Bertrandite-bearing greisen, a new beryllium ore, in the Lake George...____________________________________ _ 45. Variations in base-metal contents of monzonitic intrusives, by Wallace R |  | | Book (volume) | | by choosing from the 19 text volumes that one bearing the appropriate letter for the subject. As for...grouped into four broad groups: continental, volcanic, high limestone, and low coral reef. The continental or...change or tectonic uplift. See REEF. There are also high limestone islands that have the surface of the...others are emerged volcanoes draped with limestone. High limestone islands have also been the location of...variations are termed the Southern Oscillation. Unusually high air pressure in one region is accompanied by unusually |
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