Kimberlites distribution in Angola and prospective areas for new discoveries |
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Authors: | Ustinov Victor N Feijo Bartolomeu Ana M Zagainy Alexander K Felix Joao T Mikoev Igor I Stegnitskiy Yury B Lobkova Ludmila P Kukui Irina M Nikolaeva Evelina V Antonov Sergei A |
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Institution: | 1.Diamond Department, Central Research and Exploration Institute (TsNIGRI), 24/1 Odoevskogo St., Saint-Petersburg, 199155, Russia ;2.Empresa Nacional de Diamantes de Angola (ENDIAMA) E.P, 100 Rua Major Kanhangulo, C.P. 1247, Luanda, Angola ;3.Sociedade Mineira de Catoca Lda. (CATOCA), Quarteirão GU-01, Avenida Talatona, Luanda Sul S/N, Cx.Postal 10257, Luanda, Angola ;4.ALROSA PJSC, 128A Nevsky Pr., Saint-Petersburg, 191036, Russia ; |
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Abstract: | Based on a comprehensive analysis of kimberlite pipes of Angola, including the near surface structural setting, deep lithospheric structure, pipe morphology and emplacement, mineralogical and petrographic features, diamond characteristics and locations of secondary deposits four geographical regions have been outlined within Angola representing four types of diamond bearing potential. These areas include high diamond bearing potential pipes, possible potential, no potential, and unclear potential areas. It was found that the depth of magmatism and diamond potential of kimberlites increases from the Atlantic coast in southwestern Angola into the continent in the north-easterly direction. Areas prospective for the discovery of new primary diamond deposits have been identified. |
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