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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A feasibility study of U−Pb and Pb−Pb dating of kimberlites using groundmass mineral fractions and whole-rock samples
TL;DR: In this article, the authors described partly successful attempts to determine emplacement ages of kimberlites by U−Pb and Pb−PB methods, involving groundmass minerals with high U content (notably perovskite) and whole-rock kimbersite samples.
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Old model Nd ages in Namibian Pan-African rocks
TL;DR: In this paper, the authors investigated the Nd- and Sr-isotope characteristics of rocks involved in a relatively young (800-450 Myr) orogenic event, and used them to outline the range in age and geochemical characteristics of rock sequences and provinces within both the upper mantle and the pre-existing crust which were sampled during the orogeny, and hence provided the major components of what is now a stable segment of continental crust.
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Proposal for International Agreement on Ca Notation Resulting from Discussions at Workshops on Stable Isotope Measurements Held in Davos (Goldschmidt 2002) and Nice (EGS‐AGU‐EUG 2003)
Anton Eisenhauer,Thomas F. Nägler,Peter Stille,Jan Kramers,Nikolaus Gussone,Barbara Bock,Jan Fietzke,Dorothee Hippler,Anne-Désirée Schmitt +8 more
TL;DR: A proposal is made to standardise the reporting of Ca isotope data to the δ44Ca/40Ca notation (or δ 44Ca/42Ca) and to adopt NIST SRM 915a as the reference standard.
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Proposal for an International Agreement on Ca Notation as Result of theDiscussions from the workshops on Stable Isotope Measurements in Davos(Goldschmidt 2002) and Nice (EGS-AGU-EUG 2003).
Anton Eisenhauer,T.F. Nägler,Peter Stille,Jan Kramers,Nikolaus Gussone,Barbara Bock,Jan Fietzke,Dorothee Hippler,Anne-Désirée Schmitt +8 more
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Precise Os isotope ratio and Re-Os isotope dilution measurements down to the picogram level using multicollector inductively coupled plasma mass spectrometry
TL;DR: In this paper, analytical procedures to measure Os isotopic composition and to determine isotope dilution Re and Os concentrations accurately, precisely, and rapidly on a multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS) are described.