Browsing Journal Articles by Author "Talma, AS"

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Age interpretation of the Wonderkrater spring sediments and vegetation change in the Savanna Biome, Limpopo province, South Africa

Author: Scott, L ; Holmgren, K ; Talma, AS ; Woodborne, S ; Vogel, JC Date: Sep 2003 Spring accumulations are valuable and rare sources for Quaternary pollen analysis and palaeoenvironmental research in South Africa. It is important to optimize their dating, which is sometimes complicated by root contamination. Thirteen new ... Read more
Evaluating the rate of migration of an uranium deposition front within the Uitenhage Aquifer

Author: Vogel, JC ; Talma, AS ; Heaton, THE ; Kronfeld, J Date: Jul 1999 The solubility of uranium in groundwater is very sensitive to changes in redox conditions. Many secondary sandstone-type uranium deposits have been formed when soluble U has precipitated after encountering reducing conditions in the subsurface. ... Read more
Late quaternary paleotemperatures derived from a speleothem from Cango caves, Cape Province, South-Africa

Author: Talma, AS ; Vogel, JC Date: Mar 1992 An oxygen isotope temperature record over a large part of the past 30,000 yr has been obtained for the southern Cape Province of South Africa by combining data on the isotopic composition of a stalagmite from a deep cave with that of a confined ... Read more
New explanation for extreme u-234 u-238 disequilibria in a dolomitic aquifer

Author: Kronfeld, J ; Vogel, JC ; Talma, AS Date: May 1994 High U-234/U-238 activity ratios are found in the shallow groundwater of the phreatic Transvaal Dolomite Aquifer. The aquifer is uranium poor, while the waters are oxygen rich and young. Tritium and C-14 are used to show that the disequilibrium ... Read more
Persistent millennial-scale climatic variability over the past 25,000 years in Southern Africa

Author: Holmgren, K ; Lee-Thorp, JA ; Cooper, GRJ ; Lundblad, K ; Patridge, TC ; Scott, L ; Sithaldeen, R ; Talma, AS ; Tyson, PD Date: Nov 2003 Data from stalagmites in the Makapansgat Valley, South Africa, document regional climatic change in southern Africa in the Late Pleistocene and Holocene. A new TIMS U-series dated stalagmite indicates speleothem growth from 24.4 to 12.7 ka ... Read more

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Browsing Journal Articles by Author "Talma, AS"

Browsing Journal Articles by Author "Talma, AS"

Browse

All of ResearchSpace

This Collection

Quick Links

Legislation and compliance

General Enquiries

Social Connect