about
Fluctuations in Precambrian atmospheric oxygenation recorded by chromium isotopesOnset of main Phanerozoic marine radiation sparked by emerging Mid Ordovician icehouseTracing the dynamic life story of a Bronze Age FemaleCoral-based climate records from tropical South Atlantic: 2009/2010 ENSO event in C and O isotopes from Porites corals (Rocas Atoll, Brazil).A matter of months: High precision migration chronology of a Bronze Age female.Atmospheric oxygenation three billion years ago.Chromium-isotope signatures in scleractinian corals from the Rocas Atoll, Tropical South Atlantic.Oxidative elemental cycling under the low O2 Eoarchean atmosphere.Environmentally available hexavalent chromium in soils and sediments impacted by dispersed fly ash in Sarigkiol basin (Northern Greece).Origin of hexavalent chromium in groundwater: The example of Sarigkiol Basin, Northern Greece.Highly fractionated chromium isotopes in Mesoproterozoic-aged shales and atmospheric oxygenThe Pan-African West Congo belt in the Republic of Congo (Congo Brazzaville): Stratigraphy of the Mayombe and West Congo Supergroups studied by detrital zircon geochronologyFluctuations in late Neoproterozoic atmospheric oxidation — Cr isotope chemostratigraphy and iron speciation of the late Ediacaran lower Arroyo del Soldado Group (Uruguay)The behavior of molybdenum and its isotopes across the chemocline and in the sediments of sulfidic Lake Cadagno, SwitzerlandWas it for walrus? Viking Age settlement and medieval walrus ivory trade in Iceland and Greenland40Ar/39Ar dating of exceptional concentration of metals by weathering of Precambrian rocks at the Precambrian–Cambrian boundaryTrace elements and isotope geochemistry (C, O, Fe, Cr) of the Cauê iron formation, Quadrilátero Ferrífero, Brazil: Evidence for widespread microbial dissimilatory iron reduction at the Archean/Paleoproterozoic transitionChemical and isotopic architecture of the belemnite rostrumStable isotope records across the Cretaceous-Paleogene transition, Stevns Klint, Denmark: New insights from the chromium isotope systemThe geochemistry of modern calcareous barnacle shells and applications for palaeoenvironmental studiesOxygen and carbon isotope and Sr/Ca signatures of high-latitude Permian to Jurassic calcite fossils from New Zealand and New CaledoniaCarbon stable isotope record in the coral species Siderastrea stellata : A link to the Suess Effect in the tropical South Atlantic OceanPetrology and geochemistry of the ∼2.9Ga Itilliarsuk banded iron formation and associated supracrustal rocks, West Greenland: Source characteristics and depositional environmentChromium isotope fractionation between modern seawater and biogenic carbonates from the Great Barrier Reef, Australia: Implications for the paleo-seawater δ 53 Cr reconstructionThe Neoarchaean Storø Supracrustal Belt, Nuuk region, southern West Greenland: An arc-related basin with continent-derived sedimentationRemnants of arc-related Mesoarchaean oceanic crust in the Tartoq Group of SW GreenlandComplex calc-alkaline volcanism recorded in Mesoarchaean supracrustal belts north of Frederikshåb Isblink, southern West Greenland: Implications for subduction zone processes in the early EarthOrigin of Mesoarchaean arc-related rocks with boninite/komatiite affinities from southern West GreenlandConstraints on the Origin and Evolution of Magmas in the Payún Matrú Volcanic Field, Quaternary Andean Back-arc of Western ArgentinaIsotopic Studies of Human Skeletal Remains from a Sixteenth to Seventeenth Century AD Churchyard in Campeche, MexicoMultiproxy geochemical and isotope stratigraphy records of a Neoproterozoic Oxygenation Event in the Ediacaran Sete Lagoas cap carbonate, Bambuí Group, BrazilMono-sample Pb-Pb dating of pyrrhotite and tourmaline: Proterozoic vs. Archean intracratonic gold mineralization: Comment and ReplyEast Greenland ice core dust record reveals timing of Greenland ice sheet advance and retreatSubtle Cr isotope signals track the variably anoxic Cryogenian interglacial period with voluminous manganese accumulation and decrease in biodiversityCharacterisation of the natural attenuation of chromium contamination in the presence of nitrate using isotopic methods. A case study from the Matanza-Riachuelo River basin, ArgentinaMapping human mobility during the third and second millennia BC in present-day Denmark
P50
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P50
description
hulumtues
@sq
onderzoeker
@nl
researcher
@en
հետազոտող
@hy
name
Robert Frei
@ast
Robert Frei
@en
Robert Frei
@es
Robert Frei
@nl
Robert Frei
@sl
type
label
Robert Frei
@ast
Robert Frei
@en
Robert Frei
@es
Robert Frei
@nl
Robert Frei
@sl
prefLabel
Robert Frei
@ast
Robert Frei
@en
Robert Frei
@es
Robert Frei
@nl
Robert Frei
@sl
P1053
N-6798-2014
P106
P1153
56382063800
7103231290
P21
P31
P496
0000-0001-7708-9881