Redokstingimused Proterosoikumis

Viimati uuendatud märts 31, 2021

Maakera pinna redokstingimuste areng läbi Arhaikumi, Proterosoikumi ja Paleosoikumi ajaperioodide ning nende vastastikkune mõju elementide ringlusele ja elu arengule.

Kaarel Mänd
Kaarel Mänd
Tartu Ülikooli teadur

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

Publikatsioonid

Iron Isotopes Reveal a Benthic Iron Shuttle in the Palaeoproterozoic Zaonega Formation: Basinal Restriction, Euxinia, and the Effect on Global Palaeoredox Proxies
The Zaonega Formation in northwest Russia (~ 2.0 billion years old) is amongst the most complete successions that record the middle of …
PDF Tsiteeri Projekt DOI
Iron Isotopes Reveal a Benthic Iron Shuttle in the Palaeoproterozoic Zaonega Formation: Basinal Restriction, Euxinia, and the Effect on Global Palaeoredox Proxies
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 …
Tsiteeri Projekt Projekt DOI
Depositional and environmental constraints on the late Neoarchean Dagushan deposit (Anshan-Benxi area, North China Craton): An Algoma-type banded iron formation
Iron and carbon isotope constraints on the formation pathway of iron-rich carbonates within the Dagushan Iron Formation, North China Craton
Banded iron formations (BIFs) are enigmatic chemical sedimentary rocks that chronicle the geochemical and microbial cycling of iron and …
PDF Tsiteeri Projekt DOI
Iron and carbon isotope constraints on the formation pathway of iron-rich carbonates within the Dagushan Iron Formation, North China Craton
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 …
Tsiteeri Projekt Projekt DOI
Oxygenated conditions in the aftermath of the Lomagundi-Jatuli Event: The carbon isotope and rare earth element signatures of the Paleoproterozoic Zaonega Formation, Russia
Identifying global vs. basinal controls on Paleoproterozoic organic carbon and sulfur isotope records
Paleoproterozoic sedimentary successions are important archives of the redox evolution of Earth’s atmosphere and oceans. Efforts to …
Tsiteeri Projekt DOI
Identifying global vs. basinal controls on Paleoproterozoic organic carbon and sulfur isotope records
Hydrothermally induced $^{34}$S enrichment in pyrite as an alternative explanation of the Late-Devonian sulfur isotope excursion in South China
Several Late Devonian sedimentary successions host pyrite with highly positive sulfur isotope values (δ34Spyrite). These anomalous …
PDF Tsiteeri Projekt DOI
Hydrothermally induced $^{34}$S enrichment in pyrite as an alternative explanation of the Late-Devonian sulfur isotope excursion in South China
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.
PDF Tsiteeri Projekt Projekt DOI
Palaeoproterozoic oxygenated oceans following the Lomagundi–Jatuli Event
High-CO$\\_2$, acidic and oxygen-starved weathering at the Fennoscandian Shield at the Archean-Proterozoic transition
Chemical weathering of continental crust plays an important role in Earth‘s surface evolution and also controls the nutrient flow to …
Tsiteeri Projekt Projekt DOI
High-CO$\\_2$, acidic and oxygen-starved weathering at the Fennoscandian Shield at the Archean-Proterozoic transition
Multiple sulphur isotope records tracking basinal and global processes in the 1.98 Ga Zaonega Formation, NW Russia
The exceptionally organic-rich rocks of the 1.98 Ga Zaonega Formation deposited in the Onega Basin, NW Russia, have refined our …
PDF Tsiteeri Projekt DOI
Multiple sulphur isotope records tracking basinal and global processes in the 1.98 Ga Zaonega Formation, NW Russia