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Kalkkop crater, Eastern Cape: A new impact crater in South AfricaReimold et al. suggested that the 640 m diameter Kalkkop crater, at 32 deg 43 min S/24 deg 34 min E in the Eastern Cape Province (South Africa), could possibly be of impact origin. This idea was based on the circularity of this structure, its regional uniqueness, lack of recent igneous activity in the region, and descriptions of drillcore indicating that the crater is not underlain by a salt dome and is partially filled with a breccia layer of a thickness which would agree with the dimensions expected for an impact structure of this size. Unfortunately the old drillcore was no longer available for detailed study, and in the absence of sufficient surface exposure only drilling could provide the evidence needed to solve the problem of the origin of Kalkkop. For this reason and to study the crater fill from a paleoenvironmental point of view, the S. African Geological Survey decided to sponsor a new research drilling project at the Kalkkop site. First petrographic and isotopic results from Kalkkop drill core studies confirming, without doubt, that this crater is of impact origin are presented.
Document ID
Document Type
Conference Paper
Reimold, W. U.
(Witwatersrand Univ. Johannesburg, South Africa)
Leroux, F. G.
(Geological Survey of South-West Africa/Namibia Windhoek., United States)
Koeberl, C.
(Wien Univ. Austria)
Shirey, S. B.
(Wien Univ. Austria)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z
Subject Category
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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