| | Journal (article/letter/editorial) |
production of Nb, with the primary St. HonorĆ© carbonatite and other sources accounting for only for 7 and...individual petrographically-deļ¬ned units of carbonatite contain distinct suites of pyrochlore. Bulk rock...10 times or more above those of the primary carbonatite. Commonly, pyrochlores in laterites are ļ¬ne grained...and 1%, respectively. Mining at the CatalĆ£o-I carbonatite was discontinued in 2001, although there is a...occurrences of carbonatite are currently being evaluated [e.g. Aley and Upper Fir (Canada); Elk Creek (USA)] or |
| | Journal (article/letter/editorial) |
placer deposits and weathered crusts overlying carbonatite and peralkaline complexes account for the majority...majority of Ta production. Several carbonatite-related deposits (e.g. Upper Editorial handling: D. Huston...Weathered crusts overlying carbonatite complexes in Brazil and one hard rock carbonatite deposit in Canada account...5.0ā5.5 6ā6.5 6 Reference Pegmatites and carbonatite complexes 7.3 5.2ā5.7 4.3ā5.9 5.4 NA 5...(2004) Carbonatite complexes Pegmatites and peralkaline complexes Peralkaline and carbonatite complexes |
| | Book (edition) |
Dedicated to Harry von Eckermann, an eponym for carbonatite, with admiration and affection Preface to the...this edition, summarizes the major advances in carbonatite studies in the decade 1966-1976. Since 1966 many...Certainly one of the important new facets of carbonatite study will be their saprolite geology. Recognition...Kimberlites Carbonatites and Vulcanism Geology of Carbonatite Bodies Mineralogy and Petrology Composition and...: Geological Society of South Africa and R. L. Johnson (1961) : The Mineralogical Magazine and D. S. Sutherland |
| | Report (issue) |
... C1 Chapter D. Barite (Barium) By Craig A. Johnson, Nadine M. Piatak, and M. Michael Miller.........and simplified geologic map of the Hellroaring Creek prospect, which is located west of Kimberley, British...related to strongly differentiated granites, for carbonatite-related fluorspar deposits, and for veins from...showing the subsurface geology of the Saint-HonorƩ carbonatite complex in southern Quebec, Canada, and a schematic...Photograph of the Mountain Pass Mine in San Bernardino County, California, which was the only active producer |
| | Report (Issue volume) |
Geology. Nebraska: Conservation and Survey Division of the University of Nebraska (Nebraska Geological...----- - 549 Oklahoma, by L . G. Southard, K. S. Johnson, and J. F. Roberts ----- - --- ---------------...___ ____ Missouri_ __ .______ Montana __________ Nebraska _______ __ _ Nevada ___ ____ __ . _ New Hampshire___...1 , 024 69 NA 29 3,496 612 w w w w w w NEBRASKA Clays .... _.. . __________ ........ __ . __...1,029 110 152 117 111 3 ,430 416 1 ,016 459 Nebraska: Metal __ _____ __ ___________ Nonmetal_ __________ |