Jälgmetallide ja toiteelementide geokeemia

Viimati uuendatud märts 31, 2021

Jälgmetallide ja mineraalsete toiteelementide porsumine mandritel, nende transport ookeanidesse ja ladestumine setetes.

Kaarel Mänd
Kaarel Mänd
Tartu Ülikooli teadur

Minu teadustöö põhisuunaks on Eelkambriumi aja keskkonnatingimuste uurimine kivimite jälgmetallkoostise põhjal.

Publikatsioonid

The Kaolinite Shuttle Links the Great Oxidation and Lomagundi Events
The ~2.22–2.06 Ga Lomagundi Event was the longest positive carbon isotope excursion in Earth’s history and is commonly interpreted to …
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The Kaolinite Shuttle Links the Great Oxidation and Lomagundi Events
Constraining the conditions of phosphogenesis: Stable isotope and trace element systematics of Recent Namibian phosphatic sediments
Modern phosphogenesis occurs on continental margins influenced by upwelling and high primary productivity. The formation of phosphatic …
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Constraining the conditions of phosphogenesis: Stable isotope and trace element systematics of Recent Namibian phosphatic sediments
Depositional and environmental constraints on the late Neoarchean Dagushan deposit (Anshan-Benxi area, North China Craton): An Algoma-type banded iron formation
The late Neoarchean, ~ 2.53 to 2.51 Ga Dagushan banded iron formation (BIF), is a typical Algoma-type BIF located in the northeast part …
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Depositional and environmental constraints on the late Neoarchean Dagushan deposit (Anshan-Benxi area, North China Craton): An Algoma-type banded iron formation
Trace Elemental Partitioning on Clays Derived from Hydrothermal Muds of the El Tatio Geyser Field, Chile
Recent experimental studies have demonstrated that clay minerals (e.g., kaolinite, illite, and montmorillonite) have higher affinities …
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Trace Elemental Partitioning on Clays Derived from Hydrothermal Muds of the El Tatio Geyser Field, Chile
Oxygenated conditions in the aftermath of the Lomagundi-Jatuli Event: The carbon isotope and rare earth element signatures of the Paleoproterozoic Zaonega Formation, Russia
The c. 2.0 Ga Zaonega Formation of the Onega Basin (NW Russia) has been central in efforts to understand what led to the initial rise …
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Oxygenated conditions in the aftermath of the Lomagundi-Jatuli Event: The carbon isotope and rare earth element signatures of the Paleoproterozoic Zaonega Formation, Russia
Palaeoproterozoic oxygenated oceans following the Lomagundi–Jatuli Event
The oceans probably remained well-oxygenated for millions of years after the Palaeoproterozoic Lomagundi–Jatuli Event, according to high concentrations and isotope signatures of redox-sensitive metals in the 2-billion-year-old Zaonega Formation, Russia.
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Palaeoproterozoic oxygenated oceans following the Lomagundi–Jatuli Event
Trace metals
Trace metals are metallic elements on the periodic table that are found in low concentrations in both aqueous environments (seawater, …
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REE+Y uptake and diagenesis in recent sedimentary apatites
Rare Earth Elements and Yttrium (REE+Y) distribution in authigenic phases are frequently used as proxies for reconstructing past …
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REE+Y uptake and diagenesis in recent sedimentary apatites
Potential influence of sulphur bacteria on Palaeoproterozoic phosphogenesis
All known forms of life require phosphorus, and biological processes strongly influence the global phosphorus cycle1. Although the …
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Potential influence of sulphur bacteria on Palaeoproterozoic phosphogenesis