J
Jan Kramers
Researcher at University of Johannesburg
Publications - 181
Citations - 22087
Jan Kramers is an academic researcher from University of Johannesburg. The author has contributed to research in topics: Metamorphism & Craton. The author has an hindex of 56, co-authored 175 publications receiving 20428 citations. Previous affiliations of Jan Kramers include University of Liverpool & Leipzig University.
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PGE enrichment in chromitite layers and the Merensky Reef of the western Bushveld Complex; a Re-Os and Rb-Sr isotope study.
TL;DR: In this paper, a Re-Os isochron analysis of poikilitic pyroxenites of the Bastard Unit, all relatively low in osmium concentrations, was performed and the results demonstrated an excellent radiogenic Os isotopic homogeneity of this portion of the complex at the time of crystallization.
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Contemporary flowstone development links early hominin bearing cave deposits in South Africa
Robyn Pickering,Robyn Pickering,Jan Kramers,Jan Kramers,P. J. Hancox,Darryl J. de Ruiter,Jon Woodhead +6 more
TL;DR: In this paper, the authors reported new uranium-lead (U-Pb) radiometric ages obtained from sheets of calcium carbonate flowstone interbedded between clastic cave sediments at the site of Swartkrans, providing bracketing ages for the fossiliferous deposits.
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Single mineral dating by the PbPb step-leaching method: Assessing the mechanisms
Robert Frei,Igor M. Villa,Thomas F. Nägler,Jan Kramers,Wojciech J. Przybyłowicz,V.M. Prozesky,Beda A. Hofmann,Balz S. Kamber +7 more
TL;DR: In this paper, a centimenter-sized single crystal of museum-quality titanite was used for stepwise PbPb leaching (PbSL) to date rock-forming silicates directly linked to metamorphic reactions.
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Lead and strontium isotopes in Cretaceous kimberlites and mantle-derived xenoliths from Southern Africa
TL;DR: In this article, the authors measured the lead isotope ratios of kimberlites and autoliths in the Cretaceous and found a large spread in initial lead ratios.
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An isotopic and geochemical study of the northern Kaapvaal Craton and the Southern Marginal Zone of the Limpopo Belt: are they juxtaposed terranes?
TL;DR: In this article, the authors studied the lateral accretion models for the Archean Kaapvaal Craton in South Africa, metapelites and leucocratic granitoids from two different provinces.