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pro vyhledávání: '"J. Le Bas"'
Decades of field and microscope studies, and more recent quantitative geochemical analyses have resulted in a vast, and sometimes overwhelming, array of nomenclature and terminology associated with igneous rocks. This book presents a complete classif
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Publikováno v:
Acta Geologica Sinica - English Edition. 74:605-612
An REE-rich carbonatite dyke was found in Dulahala, close to the Bayan Obo superlarge REE-Nb-Fe mineral deposit in Inner Mongolia, northern China. The REE content in the dyke varies greatly, from 1% up to 20% (wt), which might constitute rich REE ore
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49c6d74bb73290c6670a89eecdeed52e
https://doi.org/10.1111/j.1755-6724.2000.tb00031.x
https://doi.org/10.1111/j.1755-6724.2000.tb00031.x
Autor:
Michael J. Le Bas
Publikováno v:
The Canadian Mineralogist. 46:915-932
A review of occurrences of potassic and sodic fenitization around carbonatites is presented, including several new examples and oceanic ones. Taken in conjunction with the many examples quoted in the literature, conclusions are drawn that the K and N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e856b4e9fdff5b4060f15356cd673a6
https://doi.org/10.3749/canmin.46.4.915
https://doi.org/10.3749/canmin.46.4.915
Publikováno v:
Mineralogy and Petrology. 90:223-248
New data on Sr and Nd isotope composition and major and trace element distribution in dolomite-calcite carbonatite dykes at Bayan Obo are provided, and a Mid-Proterozoic age is deduced. The dykes and the neighbouring massive dolomite (H8) body have s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36ff2321116667ed0f8b61e3d4e0cc2d
https://doi.org/10.1007/s00710-006-0177-x
https://doi.org/10.1007/s00710-006-0177-x
Autor:
Rex N. Taylor, M. A. O. Ba-bttat, M. J. Le Bas, Paul M. Evins, James A. Milton, B. F. Windley
Publikováno v:
Mineralogy and Petrology. 82:105-135
Dykes of carbonate rocks, that cut gneisses in the Lowder-Mudiah area of southern Yemen, consist of dolomite and/or calcite with or without apatite, barite and monazite. Petrographic observations, mineralogical, XRF and ICP-MS analyses reveal that so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3e4e819d22990eb655a450b357cc3e5
https://doi.org/10.1007/s00710-004-0056-2
https://doi.org/10.1007/s00710-004-0056-2
Autor:
X. M. Yang, Michael J. Le Bas
Publikováno v:
Lithos. 72:97-116
Carbonate rocks at the Bayan Obo giant rare earth element (REE)–Nb–Fe ore deposit, Inner Mongolia, China are divided into four categories: sedimentary limestone and dolostone (H8s), deformed mineralized coarse-grained dolomite marble (H8c) and fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a161f8113311394e7273fc8ba51fa52b
https://doi.org/10.1016/j.lithos.2003.09.002
https://doi.org/10.1016/j.lithos.2003.09.002
Publikováno v:
Mineralogical Magazine. 67:931-955
The ∽16 Ma Rangwa Caldera Complex, part of the large Kisingiri nephelinite-carbonatite volcano, Homa Bay District, western Kenya (0º34’S; 34º09’E) contains carbonatitic lapilli and ash tuffs, agglomerate and tuffisite, and a number of intrusi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dad27e635db5deb2474e90c0c433aa8c
https://doi.org/10.1180/0026461036750152
https://doi.org/10.1180/0026461036750152