Results: 1-14 |
Results: 14

Authors: Evans, DAD Gutzmer, J Beukes, NJ Kirschvink, JL
Citation: Dad. Evans et al., Paleomagnetic constraints on ages of mineralization in the Kalahari manganese field, South Africa, ECON GEOL B, 96(3), 2001, pp. 621-631

Authors: Schaefer, MO Gutzmer, J Beukes, NJ
Citation: Mo. Schaefer et al., Late Paleoproterozoic Mn-rich oncoids: Earliest evidence for microbially mediated Mn precipitation, GEOLOGY, 29(9), 2001, pp. 835-838

Authors: Gutzmer, J Pack, A Luders, V Wilkinson, JJ Beukes, NJ van Niekerk, HS
Citation: J. Gutzmer et al., Formation of jasper and andradite during low-temperature hydrothermal seafloor metamorphism, Ongeluk Formation, South Africa, CONTR MIN P, 142(1), 2001, pp. 27-42

Authors: Bekker, A Kaufman, AJ Karhu, JA Beukes, NJ Swart, QD Coetzee, LL Eriksson, KA
Citation: A. Bekker et al., Chemostratigraphy of the paleoproterozoic Duitschland Formation, South Africa: Implications for coupled climate change and carbon cycling, AM J SCI, 301(3), 2001, pp. 261-285

Authors: Gutzmer, J Beukes, NJ Pickard, A Barley, ME
Citation: J. Gutzmer et al., 1170 Ma SHRIMP age for Koras Group bimodal volcanism, Northern Cape Province, S AFR J GEO, 103(1), 2000, pp. 32-37

Authors: Pack, A Gutzmer, J Beukes, NJ van Niekerk, HS
Citation: A. Pack et al., Supergene ferromanganese wad deposits derived from Permian Karoo strata along the Late Cretaceous-mid-Tertiary African land surface, Ryedale, South Africa, ECON GEOL B, 95(1), 2000, pp. 203-220

Authors: Gutzmer, J Beukes, NJ
Citation: J. Gutzmer et Nj. Beukes, The manganese formation of the Neoproterozoic Penganga Group, India - Revision of an enigma - A reply, ECON GEOL B, 95(1), 2000, pp. 239-240

Authors: Kirschvink, JL Gaidos, EJ Bertani, LE Beukes, NJ Gutzmer, J Maepa, LN Steinberger, RE
Citation: Jl. Kirschvink et al., Paleoproterozoic snowball Earth: Extreme climatic and geochemical global change and its biological consequences, P NAS US, 97(4), 2000, pp. 1400-1405

Authors: Gutzmer, J Nhleko, N Beukes, NJ Pickard, A Barley, ME
Citation: J. Gutzmer et al., Geochemistry and ion microprobe (SHRIMP) age of a quartz porphyry sill in the Mozaan Group of the Pongola Supergroup: implications for the Pongola and Witwatersrand Supergroups, S AFR J GEO, 102(2), 1999, pp. 139-146

Authors: Beukes, NJ van Niekerk, HS Gutzmer, J
Citation: Nj. Beukes et al., Post Gondwana African land surfaces and pedogenetic ferromanganese deposits on the Witwatersrand at the West Wits Gold Mine, South Africa, S AFR J GEO, 102(1), 1999, pp. 65-82

Authors: Van Niekerk, HS Beukes, NJ Gutzmer, J
Citation: Hs. Van Niekerk et al., Post-Gondwana pedogenic ferromanganese deposits, ancient soil profiles, African land surfaces and palaeoclimatic change on the Highveld of South Africa, J AFR EARTH, 29(4), 1999, pp. 761-781

Authors: Luders, V Gutzmer, J Beukes, NJ
Citation: V. Luders et al., Fluid inclusion studies in cogenetic hematite, hausmannite, and gangue minerals from high-grade manganese ores in the Kalahari manganese field, SouthAfrica, ECON GEOL B, 94(4), 1999, pp. 589-595

Authors: van Niekerk, HS Gutzmer, J Beukes, NJ Phillips, D Kiviets, GB
Citation: Hs. Van Niekerk et al., An Ar-40/Ar-39 age of supergene K-Mn oxyhydroxides in a post-Gondwana soilprofile an the Highveld of South Africa, S AFR J SCI, 95(10), 1999, pp. 450-454

Authors: Bau, M Romer, RL Luders, V Beukes, NJ
Citation: M. Bau et al., Pb, O, and C isotopes in silicified Mooidraai dolomite (Transvaal Supergroup, South Africa): implications for the composition of Paleoproterozoic seawater and 'dating' the increase of oxygen in the Precambrian atmosphere, EARTH PLAN, 174(1-2), 1999, pp. 43-57
Risultati: 1-14 |