Ilka C. Kleinhanns
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View article: Expansion of the aerobic iron biogeochemical cycle during the Paleoproterozoic Lomagundi event
Expansion of the aerobic iron biogeochemical cycle during the Paleoproterozoic Lomagundi event Open
The expansion of ocean oxygenation during the Paleoproterozoic Lomagundi carbon isotope excursion remains highly debated. Here, we present iron isotope data for the coeval marine Francevillian Group strata. The data scatter from heavy to l…
View article: Mineralogical and Geochemical Response to Fluid Infiltration into Cambrian Orthopyroxene-Bearing Granitoids and Gneisses, Dronning Maud Land, Antarctica
Mineralogical and Geochemical Response to Fluid Infiltration into Cambrian Orthopyroxene-Bearing Granitoids and Gneisses, Dronning Maud Land, Antarctica Open
Fluid infiltration into Proterozoic and Early Palaeozoic dry, orthopyroxene-bearing granitoids and gneisses in Dronning Maud Land, Antarctica, has caused changes to rock appearance, mineralogy, and rock chemistry. The main mineralogical ch…
View article: Atmospheric oxygenation at the onset of Earth’s Great Oxidation forced enhanced marine anoxia
Atmospheric oxygenation at the onset of Earth’s Great Oxidation forced enhanced marine anoxia Open
Capturing the loss of mass-independent sulphur isotope fractionation (MIF-S), the correlative South African Duitschland and Rooihoogte formations are widely held to bear the isotopic fingerprint of the first atmospheric oxygenation at the …
View article: Light stable Cr isotope compositions of mid-ocean ridge basalts: Implications for mantle source composition
Light stable Cr isotope compositions of mid-ocean ridge basalts: Implications for mantle source composition Open
View article: Evidence for contemporaneous deposition of the Duitschland and Rooihoogte formations (Transvaal Supergroup): Implications for tempo and mode of Earth’s Great Oxidation
Evidence for contemporaneous deposition of the Duitschland and Rooihoogte formations (Transvaal Supergroup): Implications for tempo and mode of Earth’s Great Oxidation Open
View article: Linking atmospheric oxygenation to marine deoxygenation during Earth’s Great Oxidation
Linking atmospheric oxygenation to marine deoxygenation during Earth’s Great Oxidation Open
View article: Selectively targeting authigenic and detrital components in impure chemical sedimentary rocks of the 1.85 Ga Duck Creek Dolomite, Western Australia
Selectively targeting authigenic and detrital components in impure chemical sedimentary rocks of the 1.85 Ga Duck Creek Dolomite, Western Australia Open
View article: Redox-independent isotope fractionation during Cr(III) adsorption onto goethite and magnetite
Redox-independent isotope fractionation during Cr(III) adsorption onto goethite and magnetite Open
View article: Single pulse of significant O<sub>2</sub> increase during the Great Oxidation Event – geochemical, isotopic and stratigraphic evidence from the Duitschland and Rooihoogte formations (South Africa)
Single pulse of significant O<sub>2</sub> increase during the Great Oxidation Event – geochemical, isotopic and stratigraphic evidence from the Duitschland and Rooihoogte formations (South Africa) Open
View article: Black Sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics
Black Sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics Open
The Black Sea experienced pronounced millennial-scale changes in temperature and rainfall during the last glacial coinciding with Dansgaard-Oeschger cycles. However, little is known regarding the amount and sources of freshwater reaching t…
View article: Age disequilibrium between zircon and their granitoid hosts caused by intracrustal reworking: Nd-Hf-Ar isotope evidence of Archaean Granitoids from Barberton Mountain Land (Kaapvaal craton, South Africa)
Age disequilibrium between zircon and their granitoid hosts caused by intracrustal reworking: Nd-Hf-Ar isotope evidence of Archaean Granitoids from Barberton Mountain Land (Kaapvaal craton, South Africa) Open
View article: Stable Cr isotope compositions of modern silicate mantle reservoirs
Stable Cr isotope compositions of modern silicate mantle reservoirs Open
View article: Stratigraphic correlation and provenance of the Duitschland/Rooihoogte formation(s) and its implications for the interpretation of the Great Oxidation Event
Stratigraphic correlation and provenance of the Duitschland/Rooihoogte formation(s) and its implications for the interpretation of the Great Oxidation Event Open
View article: Major hydrological shifts in the Black Sea “Lake” in response to ice sheet collapses during MIS 6 (130–184 ka BP)
Major hydrological shifts in the Black Sea “Lake” in response to ice sheet collapses during MIS 6 (130–184 ka BP) Open
View article: Quantitative Data Extraction from Orthopyroxene Trace Element Maps and Its Potential to Examine the Formation of the UG2 Unit, Bushveld Complex
Quantitative Data Extraction from Orthopyroxene Trace Element Maps and Its Potential to Examine the Formation of the UG2 Unit, Bushveld Complex Open
We present a mineral chemical stratigraphy across the UG2 Unit, situated in the Upper Critical Zone of the Bushveld Complex. The magmatic evolution of the rocks hosting this world-class ore deposit for chromium and platinum group elements …
View article: Pervasively anoxic surface conditions at the onset of the Great Oxidation Event: New multi-proxy constraints from the Cooper Lake paleosol
Pervasively anoxic surface conditions at the onset of the Great Oxidation Event: New multi-proxy constraints from the Cooper Lake paleosol Open
View article: Silicon and chromium stable isotopic systematics during basalt weathering and lateritisation: A comparison of variably weathered basalt profiles in the Deccan Traps, India
Silicon and chromium stable isotopic systematics during basalt weathering and lateritisation: A comparison of variably weathered basalt profiles in the Deccan Traps, India Open
View article: Iron Isotope Fractionation during Fe(II) Oxidation Mediated by the Oxygen-Producing Marine Cyanobacterium <i>Synechococcus</i> PCC 7002
Iron Isotope Fractionation during Fe(II) Oxidation Mediated by the Oxygen-Producing Marine Cyanobacterium <i>Synechococcus</i> PCC 7002 Open
In this study, we couple iron isotope analysis to microscopic and mineralogical investigation of iron speciation during circumneutral Fe(II) oxidation and Fe(III) precipitation with photosynthetically produced oxygen. In the presence of th…
View article: CONNECTING GEOLOGY AND GEOPHYSICS: THE GEODYNAMIC EVOLUTION OF DRONNING MAUD LAND FROM RODINIA TO GONDWANA
CONNECTING GEOLOGY AND GEOPHYSICS: THE GEODYNAMIC EVOLUTION OF DRONNING MAUD LAND FROM RODINIA TO GONDWANA Open
East Antarctica consists of a number of cratonic fragments that amalgamated along distinct orogenic belts in late Neoproterozoic to early Palaeozoic times. These mobile belts include the c. 640 to 500 Ma old East African-Antarctic Orogen (…