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Major Element Indicator Mineral Chemistry of the Lulo Kimberlite Province, Lunda Norte, Angola
International Kimberlite Conference Extended Abstracts: 2024openaire +1 more source
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Mechanical abrasion of kimberlite indicator minerals: experimental investigations
Russian Geology and Geophysics, 2008Abstract The relative abrasive stability of kimberlite indicator minerals such as pyrope, picroilmenite, olivine, and apatite as well as diamonds and kimberlite fragments was studied experimentally, and the following sequence of mineral abrasive stability was established: pyrope–olivine–picroilmenite–apatite–kimberlite fragments. Diamond
V.P. Afanas’ev +6 more
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Geology of Ore Deposits, 2013
The formation history of dispersion halos of kimberlite indicator minerals in the Siberian Platform is described beginning from the main Middle Paleozoic productive epoch of kimberlite magmatism. The history and formation conditions of the halos are reconstructed from the ontogeny and typomorphism of indicator mineral assemblages with involvement of ...
Aleksey Agashev +2 more
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The formation history of dispersion halos of kimberlite indicator minerals in the Siberian Platform is described beginning from the main Middle Paleozoic productive epoch of kimberlite magmatism. The history and formation conditions of the halos are reconstructed from the ontogeny and typomorphism of indicator mineral assemblages with involvement of ...
Aleksey Agashev +2 more
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Eolian indicator mineral dispersion haloes from the Orapa kimberlite cluster, Botswana
Mineralogy and Petrology, 2018This paper presents the results of an investigation into the structure of eolian kimberlite indicator minerals (KIMs) haloes present within Quaternary Kalahari Group sediments (up to 20 m thick) overlying the Late Cretaceous kimberlites in the Orapa field in North-East Botswana.
VÍCTOR Ustinov
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About kimberlite indicator minerals in the Triassic tuffs of the Tunguska sineclise
Doklady Earth Sciences, 2010Nikolay Tychkov +2 more
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Manganoan ilmenite as kimberlite/diamond indicator mineral
Russian Geology and Geophysics, 2009Abstract Manganoan ilmenite was identified in Juina, Brazil kimberlitic rocks among other megacrysts. It forms oval, elongated, rimless grains comprising 8–30 wt.% of the heavy fraction. Internally the grains are homogeneous. The chemical composition of Mn-ilmenite is almost stoichiometric for ilmenite except for an unusually high ...
F.V. Kaminsky, E.A. Belousova
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GEOCHEMICAL CORRELATIONS BETWEEN KIMBERLITIC INDICATOR MINERALS AND DIAMONDS ON THE KALAHARI CRATON
Russian Geology and Geophysics, 1994Geochemical correlations between kimberlitic indicator minerals and diamonds have been established on the basis that diamonds in kimberlite are derived from disaggregated xenoliths of peridotite and eclogite. Garnet and chromite macrocrysts liberated from diamond harzburgite are in general more abundant than diamond itself and can be used as ...
J. J. Gurney, R. O. Moore
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2021
<p>For industrial deposits that contain particularly large and expensive diamonds, a diagram of the compositions of KIM (kimberlite indicator minerals) for Cr, Al, Fe, Mg, Mn is proposed. The proximity or rather convergence of the compositions of KIM is also complemented by a high correlation of the frequency of occurrence of their ...
Alexandr Ivanov, Vladimir Zinchenko
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<p>For industrial deposits that contain particularly large and expensive diamonds, a diagram of the compositions of KIM (kimberlite indicator minerals) for Cr, Al, Fe, Mg, Mn is proposed. The proximity or rather convergence of the compositions of KIM is also complemented by a high correlation of the frequency of occurrence of their ...
Alexandr Ivanov, Vladimir Zinchenko
openaire +1 more source