31 results on '"Beukes, Nicolas"'
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2. Archean to early Paleoproterozoic iron formations document a transition in iron oxidation mechanisms
3. The paleoenvironmental implications of pre-Great Oxidation Event manganese deposition in the Mesoarchean Ijzermijn Iron Formation Bed, Mozaan Group, Pongola Supergroup, South Africa
4. Paleomagnetic and 40Ar/39Ar age constraints on the timing of deposition of deep-water carbonates of the Kurnool Group (Cuddapah basin) and correlation across Proterozoic Purana successions of Southern India
5. Long-lived stable shelf deposition along Gondwana's southern margin during the Ordovician-Silurian: Inferences from U[sbnd]Pb detrital zircon ages of the Table Mountain Group (South Africa) and correlatives in Argentina and the Falklands/Malvinas Islands
6. Modern weathering in outcrop samples versus ancient paleoredox information in drill core samples from a Mesoarchaean marine oxygen oasis in Pongola Supergroup, South Africa
7. Decimeter-scale mapping of carbonate-controlled trace element distribution in Neoarchean cuspate stromatolites
8. Modern rather than Mesoarchaean oxidative weathering responsible for the heavy stable Cr isotopic signatures of the 2.95 Ga old Ijzermijn iron formation (South Africa)
9. Cause and timing of the thermal over-maturation of hydrocarbon source rocks of the Ecca Group (Main Karoo Basin, South Africa)
10. Depth-dependent δ13C trends in platform and slope settings of the Campbellrand-Malmani carbonate platform and possible implications for Early Earth oxygenation
11. The reliability of ∼2.9 Ga old Witwatersrand banded iron formations (South Africa) as archives for Mesoarchean seawater: Evidence from REE and Nd isotope systematics
12. Paleoarchean sulfur cycling: Multiple sulfur isotope constraints from the Barberton Greenstone Belt, South Africa
13. Geochemical stratigraphy, sedimentology, and Mo isotope systematics of the ca. 2.58–2.50 Ga-old Transvaal Supergroup carbonate platform, South Africa
14. Dykes of the 1.11 Ga Umkondo LIP, Southern Africa: Clues to a complex plumbing system
15. Microbial sulphur-cycling and atmospheric signatures in the 2.52 Ga Gamohaan Formation, South Africa
16. Molybdenum isotopes in late Archean carbonate rocks: Implications for early Earth oxygenation
17. Deciphering formation processes of banded iron formations from the Transvaal and the Hamersley successions by combined Si and Fe isotope analysis using UV femtosecond laser ablation
18. Validating the existence of Vaalbara in the Neoarchean
19. Correlating multiple Neoarchean–Paleoproterozoic impact spherule layers between South Africa and Western Australia
20. Lithofacies control on multiple-sulfur isotope records and Neoarchean sulfur cycles
21. Origin of two distinct multiple-sulfur isotope compositions of pyrite in the 2.5 Ga Klein Naute Formation, Griqualand West Basin, South Africa
22. Introduction: Initial investigations of a Neoarchean shelf margin-basin transition (Transvaal Supergroup, South Africa)
23. Corrigendum to “A redox-stratified ocean 3.2 billion years ago” [Earth Planet. Sci. Lett. 430 (2015) 43–53]
24. Manganese oxide shuttling in pre-GOE oceans – evidence from molybdenum and iron isotopes
25. 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
26. A redox-stratified ocean 3.2 billion years ago
27. Fe, C, and O isotope compositions of banded iron formation carbonates demonstrate a major role for dissimilatory iron reduction in ~2.5 Ga marine environments
28. Isotopic evidence for iron mobilization during Paleoproterozoic lateritization of the Hekpoort paleosol profile from Gaborone, Botswana
29. Petrography and geochemistry of a 2000–2200-Ma-old hematitic Paleo-alteration profile on Ongeluk basalt of the Transvaal supergroup, Griqualand West, South Africa
30. Geochemistry and sedimentology of a facies transition — from microbanded to granular iron-formation — in the early Proterozoic Transvaal Supergroup, South Africa
31. Carbon and sulfur isotopic compositions of organic carbon and pyrite in sediments from the Transvaal Supergroup, South Africa
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