Results 11 to 20 of about 1,851 (210)

Chemostratigraphy of Neoproterozoic carbonates: implications for ‘blind dating’ [PDF]

open access: yesTerra Nova, 2001
The δ13Ccarb and 87Sr/86Sr secular variations in Neoproteozoic seawater have been used for the purpose of ‘isotope stratigraphy’ but there are a number of problems that can preclude its routine use. In particular, it cannot be used with confidence for ‘blind dating’.
Melezhik, V.A.   +3 more
openaire   +4 more sources

Geochemistry of the Northern Paraná Continental Flood Basalt (PCFB) Province: implications for regional chemostratigraphy

open access: yesBrazilian Journal of Geology, 2018
: The Paraná Continental Flood Basalt (PCFB) province is one of the largest igneous provinces on Earth, but little is known about the architecture and geochemical characteristics of the lava flows.
Fábio Braz Machado   +5 more
doaj   +3 more sources

Chemostratigraphy and Biostratigraphic Correlation: Exercises in Systematic Stratigraphy [PDF]

open access: yes, 1981
Global changes in marine geochemistry, on scales between one thousand and one million years permit the detailed correlation of sedimentary sequences in different ocean basins. The condition is that the geochemical signals are at least approximately dated by biostratigraphy (and magnetostratigraphy, where applicable).
Berger, H, Vincent, E
openaire   +1 more source

Late Cenomanian-Turonian isotopic stratigraphy in the chalk of the Paris Basin (France): a reference section between the Tethyan and Boreal realms

open access: yesBSGF - Earth Sciences Bulletin, 2021
A chemostratigraphic study (δ13C and δ18O) of the Late Cenomanian and Turonian chalk succession from the “Craie 701” Poigny borehole (near Provins in the Paris Basin, France) provides new high-resolution stable carbon and oxygen isotope data. Correlation
Le Callonnec Laurence   +3 more
doaj   +1 more source

Stable carbon isotope stratigraphy of the Silurian in the Jočionys-299 borehole (eastern Lithuania) [PDF]

open access: yesEstonian Journal of Earth Sciences, 2022
In recent years it has become commonplace to formalize chemostratigraphic units and identify isotopic zones (chemo­stratigraphic units) from excursions.
Tomas Želvys   +5 more
doaj   +1 more source

Geochemical and palaeontological evidence for the definition of the Silurian/Devonian boundary in the Changwantang Section, Guangxi Province, China [PDF]

open access: yesEstonian Journal of Earth Sciences, 2015
Southern Guangxi Province is one of the important areas for the study of the Silurian/Devonian boundary (SDB) in South China. Despite attempts to define the exact level of the SDB in the Yulin (Guangxi Province) area using biostratigraphy, no consensus ...
Wen-jin Zhao   +3 more
doaj   +1 more source

Geology, lithogeochemistry and paleotectonic setting of the host sequence to the Kangasjärvi Zn-Cu deposit, central Finland: Implications for volcanogenic massive sulphide exploration in the Vihanti-Pyhäsalmi district [PDF]

open access: yesBulletin of the Geological Society of Finland, 2004
The Kangasjärvi Zn-Cu deposit is a highly deformed and metamorphosed Paleoproterozoic volcanogenic massive sulphide (VMS) deposit located in the Vihanti-Pyhäsalmi base metal mining district of central Finland.
M.D. Roberts, N.H.S. Oliver, R. Lahtinen
doaj   +1 more source

AGE OF THE KINTEREP FORMATION OF THE NORTHWESTERN SALAIR: CHEMOSTRATIGRAPHY AND U-Pb ZIRCON DATING

open access: yesГеодинамика и тектонофизика, 2022
A comprehensive study of the stratotype section of the Kinterep formation of the North-Western Salair was carried out, including geochemical and isotope (Sr, C, O) studies of carbonate rocks, and U-Pb dating (LA-ICP-MS) of igneous zircon crystals from ...
N. I. Vetrova   +3 more
doaj   +1 more source

Carbonate storm deposits and C, O isotopes of the Lagoa do Jacaré Formation (Ediacaran) in the Paraopeba area, Bambuí Group, Brazil [PDF]

open access: yesBrazilian Journal of Geology, 2022
A section investigated in the region of Paraopeba, Minas Gerais, provided detailed sedimentologic, stratigraphic and chemostratigraphic data from the Ediacaran Lagoa do Jacaré Formation, Bambuí Group, Southeast Brazil.
Marcio Vinicius Santana Dantas   +6 more
doaj   +1 more source

Přídolí carbon isotope trend and upper Silurian to lowermost Devonian chemostratigraphy based on sections in Podolia (Ukraine) and the East Baltic area [PDF]

open access: yesEstonian Journal of Earth Sciences, 2012
Insufficient knowledge of carbon isotope cycling in the latest Silurian initiated the study of two regions at the western and southwestern margins of Baltica in order to obtain a more complete picture about the carbon isotope trend through the Přídolí ...
Dimitri Kaljo   +4 more
doaj   +1 more source

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