Results 21 to 30 of about 1,851 (210)

«AIRES» SHARED RESEARCH FACILITIES (IPGG RAS, St. PETERSBURG): SCIENTIFIC EQUIPMENT, MAIN RESEARCH DIRECTIONS AND RESULTS

Геодинамика и тектонофизика, 2022
The "AIRES" Shared Research Facilities (SRF) is a high-tech laboratory complex based on the Institute of Precambrian Geology and Geochronology RAS (IPGG RAS, St. Petersburg).
A. B. Kuznetsov, T. S. Zaitseva, E. B. Salnikova   +2 more
doaj   +1 more source

A bio-chemostratigraphical test of the synchroneity of biozones in the upper Silurian of Estonia and Latvia with some implications for practical stratigraphy [PDF]

Estonian Journal of Earth Sciences, 2015
The paper discusses the reliability of different biozones in terms of their synchroneity when crossing facies boundaries within a sedimentary basin. Graptolite biozones are the most trusted ones, but also biozones based on conodonts, chitinozoans and ...
Dimitri Kaljo, Rein Einasto, Tõnu Martma, Tiiu Märss, Viiu Nestor, Viive Viira   +5 more
doaj   +1 more source

High-resolution carbon isotope stratigraphy of the Lower and Middle Ordovician succession of the Yangtze Platform, China [PDF]

Estonian Journal of Earth Sciences, 2023
Variation in the relative abundance of the stable carbon isotopes has been widely used to correlate Ordovician marine successions over the past two decades.
Rongchang Wu, Fangyi Gong, Mikael Calner, Jianbo Liu, Oliver Lehnert, Xiaocong Luan, Guanzhou Yan, Lixia Li, Renbin Zhan   +8 more
doaj   +1 more source

Hg Isotopes and Enhanced Hg Concentration in the Meishan and Guryul Ravine Successions: Proxies for Volcanism Across the Permian-Triassic Boundary

Frontiers in Earth Science, 2021
High-resolution organic carbon isotope (δ13C), Hg concentration and Hg isotopes curves are presented for the Permian-Triassic boundary (PTB) sections at Guryul Ravine (India) and Meishan D (China).
Alcides Nóbrega Sial, Jiubin Chen, Christoph Korte, Manoj Kumar Pandit, Jorge E. Spangenberg, Juan Carlos Silva-Tamayo, Luiz Drude de Lacerda, Valderez Pinto Ferreira, José Antônio Barbosa, Claudio Gaucher, Natan Silva Pereira, Paulo Ricardo Riedel   +11 more
doaj   +1 more source

The Nitrogen Cycle in an Epeiric Sea in the Core of Gondwana Supercontinent: A Study on the Ediacaran-Cambrian Bambuí Group, East-central Brazil

Frontiers in Earth Science, 2021
The Ediacaran-Cambrian transition is marked by the diversification of metazoans in the marine realm. However, this is not recorded by the Ediacaran-Cambrian Bambuí Group of the São Francisco basin, Brazil. Containing the sedimentary record of a partially
Paula Luiza Fraga-Ferreira, Magali Ader, Sérgio Caetano-Filho, Pierre Sansjofre, Gustavo Macedo Paula-Santos, Marly Babinski, Cristian Guacaneme, Carolina Bedoya-Rueda, Virginia Rojas, Humberto L. S. Reis, Matheus Kuchenbecker, Ricardo I. F. Trindade   +11 more
doaj   +1 more source

The Steptoean Positive Carbon Isotope Excursion (SPICE), inorganic aragonite precipitation and sea water chemistry: Insights from the Middle–Late Cambrian Port au Port Group, Newfoundland

The Depositional Record, 2022
The Late Cambrian Steptoean Positive Carbon Isotope Excursion marks a time of significant change in ocean chemistry and trilobite faunas. On the lead up to the carbon isotope excursion and at the excursion itself, there is global evidence from Laurentia ...
Joyce E. Neilson, Rosalia Barili, Alexander Brasier, Luiz F. De Ros, Sarah Ledingham   +4 more
doaj   +1 more source

⁸⁷Sr/⁸⁶Sr chemostratigraphy of Neoproterozoic Dalradian limestones of Scotland and Ireland: constraints on depositional ages and time scales [PDF]

, 2004
New calcite ⁸⁷Sr/⁸⁶Sr data for 47 limestones from the metamorphosed and deformed Neoproterozoic-Cambrian Dalradian Supergroup of Scotland and Ireland are used to identify secular trends in seawater <sup>
Fallick, A.E., Robert M. Ellam, Anthony E. Fallick, Graham, C.M., Ellam, R.M., Christopher W. Thomas, Thomas, C.W., Colin M. Graham   +7 more
core   +1 more source

Chemostratigraphy, Mineral Distributions and Water Chemistry Analysis of the Green River Formation, Piceance Basin, Northwestern Colorado [PDF]

, 2021
The Eocene Green River Formation (GRF) in the Piceance Basin of Colorado is estimated to contain the largest oil shale deposits in the world and is a well-documented example of a lacustrine depositional system.
Wu, Tengfei
core  

AGE CONSTRAINTS AND SOURCE AREAS FOR THE PRECAMBRIAN TO CAMBRIAN STRATA OF THE SOUTHERN YENISEI RIDGE (REDKOLESNAYA AND OSTROVNOY FORMATIONS)

Геодинамика и тектонофизика, 2023
The Precambrian to Cambrian strata at the southwestern margin of the Siberian Platform are ubiquitously characterized by a gradual transition from red-colored alluvial and deltaic deposits to shallow-marine carbonates, reflecting a transgressive infill ...
V. V. Marusin, B. B. Kochnev, G. A. Karlova, A. I. Proshenkin   +3 more
doaj   +1 more source

A Bayesian Approach to Inferring Depositional Ages Applied to a Late Tonian Reference Section in Svalbard

Frontiers in Earth Science, 2022
Increasing application of high precision uranium-lead (U-Pb) and rhenium-osmium (Re-Os) geochronology to the ancient geological record has resulted in massive improvement in age control and calibration of key Proterozoic stratigraphic successions and ...
Galen P. Halverson, Chen Shen, Joshua H. F. L. Davies, Lei Wu   +3 more
doaj   +1 more source