Results 51 to 60 of about 28,387 (229)

Feldspar Albitization With Implications for Reservoir Quality Evolution of Eocene Turbidite Sandstones in Offshore Espírito Santo Basin, Eastern Brazil

Journal of Petroleum Geology, EarlyView.
ABSTRACT The diagenetic albitization of plagioclase and K‐feldspar grains is a transformative process that significantly alters sandstone's detrital composition and formation water chemistry, impacting reservoir quality. In this study, Eocene turbidite sandstones from the offshore Espírito Santo Basin, Brazil, were investigated to elucidate the role of
Eveline E. Zambonato, Luiz F. De Ros, Howri Mansurbeg   +2 more
wiley   +1 more source

2014 Precambrian Field Camp

, 2014
University of Minnesota Duluth. Precambrian Research Center. (2014). 2014 Precambrian Field Camp.
University of Minnesota Duluth. Precambrian Research Center
core  

Conditions and timing for the precipitation of early marine diagenetic dolomite in the Triassic Dolomia Principale (northern Italy)

Sedimentology, EarlyView.
ABSTRACT Thermodynamic constraints and empirical evidence often suggest that fabric‐retentive replacement dolomites are stable carbonate minerals that preserve ancient seawater properties. This study evaluates this hypothesis by examining the Upper Triassic Dolomia Principale in Northern Italy.
Vivien Folliot, Giovanna Della Porta, Mathias Mueller, Fabrizio Berra, Benjamin F. Walter, Aratz Beranoaguirre, Sylvia Riechelmann, Oskar Schramm, Adrian Immenhauser   +8 more
wiley   +1 more source

2012 Precambrian Field Camp

, 2012
University of Minnesota Duluth. Precambrian Research Center. (2012). 2012 Precambrian Field Camp.
University of Minnesota Duluth. Precambrian Research Center
core  

Geochemistry of Zircon from Pegmatite-bearing Leucogranites of the Laghman Complex, Nuristan Province, Afghanistan

Russian Journal of Earth Sciences
For the first time, a study was carried out on the geochemistry of zircon (SIMS method, 2 samples, 20 points) from leucogranites of the Laghman complex, located in the pegmatite-bearing (LCT-type) province of Nuristan (Afghanistan).
Levashova Ekaterina Valer'evna, Skublov Sergey, Hamdard Nazifulla, Ivanov Mihail, Stativko Vladislav   +4 more
doaj   +1 more source

Quantification of dryland depositional environments across contrasting fluvio‐aeolian and fluvio‐lacustrine transects: An integrated subsurface and outcrop analogue study of the Organ Rock Formation, Utah, USA

Sedimentology, EarlyView.
ABSTRACT The standard subdivision of a distributive fluvial system (DFS) into proximal, medial and distal zones is typically based on the proportion of channel bodies and/or the degree of channel amalgamation, reflecting a downstream fining trend towards a mud‐prone terminal pinch‐out.
Oliver Button, Charlotte L. Priddy, Ross P. Pettigrew, Rachel Brackenridge, Ben A. Kilhams, John A. Howell   +5 more
wiley   +1 more source

THE REFERENCE GAREVKA GRANITE (YENISEI RIDGE, WESTERN MARGIN OF THE SIBERIAN CRATON): THE FINAL ATTEMPT TO VERIFY PALEOPROTEROZOIC Pb/U ISOTOPIC AGE BY M.I. VOLOBUEV

Геодинамика и тектонофизика
The article unravels a confusing history of ideas about the age of the Garevka granite pluton, which is considered as a reference object for the Precambrian of the Yenisei ridge.
A. B. Kuzmichev, M. K. Danukalova
doaj   +1 more source

Integrating Phylogenomics and Biogeography of Spectracanthicus (Siluriformes: Loricariidae) Reveals Complex Evolutionary History in a Brazilian Shield Endemic Genus

Zoologica Scripta, EarlyView.
ABSTRACT Loricariidae is the most diverse catfish family in the Neotropics. Within this group, the genus Spectracanthicus presents conflicting phylogenetic signals: morphological studies suggest monophyly, whereas previous molecular analyses often yield unresolved relationships and taxonomic uncertainty.
Felipe A. A. Araújo, Sibelle T. Vilaça, Claudio Oliveira, João Pedro Fontenelle, Viola Winkler, Alberto Akama, Wolmar B. Wosiacki   +6 more
wiley   +1 more source

Chemical composition of sandstones and paleogeodynamic reconstructions

Литосфера, 2016
The article analyzes the adequacy of compliance on paleogeodynamic nature of Upper Precambrian sedimentary associations - Bashkir meganticlinorium, Kama-Belaya aulacogene and Uchur-Maya region, received by geological methods and by using discriminant ...
A. V. Maslov, V. N. Podkovyrov, E. Z. Gareev, L. N. Kotova   +3 more
doaj   +2 more sources

Geochemistry of neoprotherosoic organic matter in the southeast of the Siberian platform

Georesursy, 2020
In the Neoproterozoic of the Aldan-Maya depression, the rocks of the Malgin (MF), Tsipanda (TF) and Kumakha (KF) Formations are enriched in organic matter (OM) and can be classified as source rocks. High generation potential is typical for the MF and TF (
Irina D. Timoshina, Lyudmila N. Boldushevskaya   +1 more
doaj   +1 more source