Results 81 to 90 of about 23,060 (244)

Geochemistry of low‐temperature dolomite formation in coastal and continental saline to sabkha‐like environments

The Depositional Record, Volume 12, Issue 4, September 2026.
This study compares primary dolomite precipitation in modern and ancient environments, varying from coastal to transitional to continental saline environments. The microbially mediated dolomites are characterised by high Sr concentrations. Here, various geochemical proxies are studied and compared to previous findings.
Carlette N. Blok, M. Luis Gibert, Zeina Naim, Jordi Ibáñez‐Insa, Mónica Sánchez‐Román   +4 more
wiley   +1 more source

Origin of carbonate-silicate rocks of the Porya Guba (the Lapland-Kolvitsa Granulite Belt) revealed by stable isotope analysis (δ18O, δ13C)

Записки Горного института
Carbonate-silicate rocks of unclear origin have been observed in granulites of the Porya Guba of the Lapland-Kolvitsa Belt within the Fennoscandinavian Shield.
Dmitrii P. Krylov, Ekaterina V. Klimova
doaj  

The carbon release triggered by 1.32 Ga sill emplacement and its potential environmental implications

Frontiers in Earth Science
Magmatic activity is one of the important pathways for the delivery of deep Earth carbon to the surface. The massive carbon release in this process can have significant impacts on atmospheric-oceanic environment.
Chaokun Zhang, Chaokun Zhang, Wei Tian, Wei Tian, Yanxin He, Yanxin He, Mingyue Gong, Shun Li   +7 more
doaj   +1 more source

Sedimentary facies and stacking patterns of fluvio‐deltaic and ‐estuarine deposits from the Palaeoarchean Moodies Group in the Stolzburg Syncline (Barberton Greenstone Belt, South Africa)

The Depositional Record, Volume 12, Issue 4, September 2026.
Drillcore BASE‐5B from the Stolzburg Syncline, Barberton Greenstone Belt, reveals a coarsening‐upward, river‐dominated fluvio‐deltaic succession transitioning upward to a fining‐upward, tide‐dominated‐estuarine succession. Abstract Investigating fluvio‐marine depositional environments from early geological times is of great importance, as they provide ...
Sanway Mukhopadhyay, Dennis Schreiber, Nina Wichern, David De Vleeschouwer, Christoph Heubeck, Marcello Gugliotta   +5 more
wiley   +1 more source

2008 Precambrian Field Camp Capstone Mapping Projects Map

, 2008
This map shows the locations of the capstone mapping projects for the 2008 Precambrian Field Camp sponsored by the Precambrian Research Center. It also indicates who participated in which project.University of Minnesota Duluth.
University of Minnesota Duluth. Precambrian Research Center
core  

New approaches to lithological and stratigraphic research and mapping of the early Precambrian complexes (using an example of the Paleoproterozoic and Archean structures of Keivy, Kola Peninsula)

Vestnik MGTU
Previously, the team of authors proposed a new method for the comparative analysis of geological objects. Its foundation is an assessment of the proximity of statistically significant petrogeochemical characteristics.
Kozlov N. E., Mudruk S. V., Sorokhtin N. O.   +2 more
doaj   +1 more source

Flexural bulges and foredeep basins: Dynamic tectonic control on shifting depocentres and condensed facies, Upper Cretaceous (Santonian), Western Canada Foreland Basin

The Depositional Record, Volume 12, Issue 4, September 2026.
Allostratigraphically defined mudstone packages show marked along‐strike thickness variation, interpreted to be related to shifting thrust activity in the orogen; loading cycles lasted about 750 kyr. Close to the orogen, the forebulge is mantled by shelly sandstone whereas far from the orogen, the forebulge is typified by organic‐rich mudstone ...
Omar N. Al‐Mufti, A. Guy Plint, El‐Mahadia I. Mohammed, Ireneusz Walaszczyk, Y. Greg Hu   +4 more
wiley   +1 more source

2012 Precambrian Field Camp Capstone Mapping Projects Map

, 2012
This map shows the locations of the capstone mapping projects for the 2012 Precambrian Field Camp sponsored by the Precambrian Research Center. It also indicates who participated in which project.University of Minnesota Duluth.
University of Minnesota Duluth. Precambrian Research Center
core  

Trace element composition of silicate minerals from Kunashak Meteorite (L6)

Записки Горного института
Major (EPMA) and trace (SIMS) element geochemistry in the silicate minerals (olivine, pyroxene and plagioclase) of Kunashak equilibrated ordinary chondrite (L6) is described. No variations in the major element concentrations of the silicate minerals have
Kristina G. Sukhanova, Olga L. Galankina
doaj  

Chervurt formation of the Kolmozero-Voron'ya belt and Keivy domain: A geodynamic reference point for spatial and temporal heterogeneity during the formation of the ancient median massif

Vestnik MGTU
The paper considers the possible correlation of the rocks of the Chervurt Formation in the Kolmozero-Voron'ya zone with its constituent supracrustal complexes and the formations of the adjacent Keivy domain, as well as the role that metasedimentary rocks
Kozlov N. E., Sorokhtin N. O.
doaj   +1 more source