A5063562196- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- High-pressure geophysics and materials
- Geochemistry and Elemental Analysis
- Geological and Geophysical Studies
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Extraction and Separation Processes
University of Oslo
2023-2025
University of the Witwatersrand
2022-2025
University of Johannesburg
2021-2025
University of Göttingen
2023
Plate tectonics is a fundamental factor in the sustained habitability of Earth, but its time onset unknown, with ages ranging from Hadaean to Proterozoic eons1-3. motion key diagnostic distinguish between plate and stagnant-lid tectonics, palaeomagnetic tests have been thwarted because planet's oldest extant rocks metamorphosed and/or deformed4. Herein, we report palaeointensity data Hadaean-age Mesoarchaean-age single detrital zircons bearing primary magnetite inclusions Barberton...
Though there is increasing evidence from different geochemical proxies for intermittent oxygenation prior to the Great Oxidation Event (GOE), it remains ambiguous whether post-depositional processes altered these proxy signals. In this regard, ca. 3.0 Ga old Keonjhar Palaeosol in Singhbhum Craton India has received particular attention, as presence of Ce anomalies Archean palaeosol been interpreted reflect oxic surface weathering conditions during Mesoarchean. Trace element analyses study...
The end of Neoarchean (⁓2.5 Ga) is characterized by the emplacement diverse granitoid groups, final cratonisation different Archean blocks, and onset mobile lid tectonics/modern style plate tectonics associated with cooling mantle. southeastern margin Bastar Craton, Central India, contains well-developed exposures granitoids this period. We for first time report field, petrographic, whole-rock geochemical, zircon U-Pb Hf isotope studies on these poorly documented granitoids. These...
Neoarchaean greenstone belts of the Zimbabwe craton host microbialite-bearing limestone successions that range in age from ~2.82 to 2.68 Ga. The best-preserved successions, according Raman geothermometry, are situated Bulawayo and Belingwe where they have been subjected lower greenschist facies metamorphism with a peak temperature ~350 °C. Elsewhere, such as Masvingo belt, temperatures reached ~540 °C, giving rise marbles. carbonate rocks consist mainly calcite and, lesser extent, dolomite...
In recent times, the Archaean geological record of Singhbhum Craton has been scrutinized regarding early Earth crustal processes, tectonics, magmatic-detrital zircon geochronology, life research, and Fe-Mn mineralization associated with volcano-sedimentary successions. However, many these studies are hampered by a lack basic stratigraphic framework various litho-stratigraphic units, complicating our understanding overall geology Craton. Here, we share first-hand information on Palaeoarchaean...
Banded Iron Formations (BIFs) are authigenic, marine sediments directly reflecting the chemical composition of ancient seawater. BIFs serve as prime geochemical archives for reconstruction Precambrian environments. However, due to scarcity well preserved Archean rocks, atmospheric and hydrospheric environmental conditions within this time frame still incompletely understood. In particular, elemental fluxes derived from continental weathering submarine hydrothermal that affected seawater...
Low-grade volcano-sedimentary rocks older than 3.2 Ga are rare in the geologic record.In this contribution, we provide insights from c. 3.30 to 3.55 old Badampahar Group exposed Daitari Greenstone Belt (DGB) of Singhbhum Craton, India [1].The DGB preserves a ~ 7 km thick volcanosedimentary succession that underwent low-grade metamorphism [2].We studied ~3.5 marine carbonaceous cherts and shales gain information on origin matter.Total organic carbon (TOC) content Kalisagar, Talpada,...
Abstract Due to the inherently fluid‐mobile nature of W, 182 W record early Earth may have been obscured by fluid‐induced mobilization W. To investigate in Archean greenstone sequences, we analyzed isotope systematics and major trace element concentrations samples from 3.53 Ga old Onverwacht Group Kaapvaal Craton (South Africa) >3.51 Badampahar Singhbhum (India). Our results for mafic ultramafic metavolcanic rocks show W/Th ratios significantly higher than primary magmatic values, which...