Results 71 to 80 of about 4,611 (176)

Pliocene–Pleistocene Redox Evolution of the Peruvian Margin: A Multi‐Proxy Approach

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Due to upwelling of nutrient‐rich waters, the Peruvian Margin is one of the most productive regions of the global ocean, hosting one of the most pronounced and shallowest oxygen minimum zones. This combination of high productivity and low oxygen makes the Peruvian margin a critical site for reconstructing past environmental changes.
P. L. Fraga‐Ferreira, C. Siebert, M. F. Lehmann, M. Frank, F. Scholz   +4 more
wiley   +1 more source

Rapid terrestrial weathering of the CI1 carbonaceous chondrite find Oued Chebeika 002

Meteoritics &Planetary Science, Volume 61, Issue 2, Page 211-223, February 2026.
Abstract Alteration of historic CI1 meteorite falls during their curation demonstrates the susceptibility of smectite‐rich carbonaceous chondrites to terrestrial exposure. The discovery of Oued Chebeika 002 in Morocco in June 2024 presents a unique opportunity to document the earliest stages of weathering of a CI1 find.
Martin R. Lee, Jasper Glazer
wiley   +1 more source

Performance Evaluation of Low-Grade Clay Minerals in LC³-Based Cementitious Composites

Solids
The cements industry is increasingly under pressure to reduce carbon emissions while maintaining performance standards. Limestone calcined clay cement (LC3) presents a promising low-carbon alternative; however, its performance depends significantly on ...
Nosheen Blouch, Syed Noman Hussain Kazmi, Nijah Akram, Muhammad Junaid Saleem, Imran Ahmad Khan, Kashif Javed, Sajjad Ahmad, Asfandyar Khan   +7 more
doaj   +1 more source

Facies control on provenance shift during the early Cambrian transgression in Korea: Detrital zircon and geochemical evidence

Sedimentology, Volume 73, Issue 2, Page 418-440, February 2026.
ABSTRACT The early Cambrian transgression that flooded continental margins worldwide produced extensive sedimentary records that archive valuable information about palaeogeography and basin dynamics. This study integrates detrital zircon U–Pb geochronology and wholerock geochemistry from the Myeonsan and Myobong formations of the basal Taebaek Group ...
Hyojong Lee, Taejin Choi, Jeong‐Hyun Lee   +2 more
wiley   +1 more source

MICROTOPOCHEMISTRY OF MARCASITE-PYRITE NODULE IN ILLITE-HEMATITE GOSSANITES OF THE LAHANOS MASSIVE SULFIDE DEPOSIT (PONTIDES, TURKEY): LA-IСP-MS DATA [PDF]

Минералогия, 2017
In addition to black shales, the sulfide nodules can occur in red-colored aposulfide deposits, e.g., illite-hematite gossanites of the Lahanos massive sulfide deposit (Pontides, Turkey), where the marcasite-pyrite nodules are located at the base of the ...
V.V. Maslennikov, N.R. Ayupova, D.A. Artem′ev, A.S. Tseluyko   +3 more
doaj  

Potential of Soils Natural Sorbents for Environmental Decontamination From 137Cs

Land Degradation &Development, Volume 37, Issue 2, Page 779-789, 30 January 2026.
ABSTRACT This study addresses the existing research gap concerning the lack of integrated data on the role of in situ soil components in the long‐term fixation of 137Cs under natural, protected, and non‐agricultural conditions. The contamination of ecosystems by radioactive isotopes, particularly 137Cs, represents a considerable environmental hazard ...
Katarzyna Szarłowicz, Filip Jędrzejek, Marcin Stobiński, Michał Skiba   +3 more
wiley   +1 more source

Probing the surface electrical properties of clay minerals with electrostatic force microscopy and kelvin probe force microscopy

Materials Research Express
Many surface processes of clay minerals require in-depth understanding of their surface electrical properties, such as surface charge density, surface potential distribution, etc In this paper, electrostatic force microscopy (EFM) and Kelvin probe force ...
Zonghua Qin, Xin Nie, Wenbin Yu, Shuguang Yang, Zongke Zhou, Shuqin Yang, Quan Wan   +6 more
doaj   +1 more source

Evidence of the Formation of Crystalline Aluminosilicate Phases in Glass-Ceramics by Calcination of Alkali-Brick Aggregates, Enabling Cs⁺, Rb⁺, Co²⁺, and Sr²⁺ Encapsulation

Applied Sciences
The feasibility of using brick aggregates for the preparation of aluminosilicate “glass-ceramic” forms as a novel cementitious composite capable of immobilizing radioactive elements was examined. Raw brick was initially activated with sodium hydroxide. X-
Abdel Boughriet, Gildas Doyemet, Nicole Poumaye, Véronique Alaimo, Sandra Ventalon, Viviane Bout-Roumazeilles, Michel Wartel   +6 more
doaj   +1 more source

The Morphological Characteristics of Clay Minerals in a Tight Sandstone Reservoir by Atomic Force Microscopy

Yankuang ceshi
Clay minerals, as one of the main components of unconventional oil and gas reservoirs, have significant implications for the evaluation of unconventional oil and gas reservoirs in terms of their fine characterization of nano/sub-nano morphological ...
Kunyang WANG, Gu DU, Guan WANG, Jiale HE
doaj   +1 more source

Differentiation of substance composition in the Typical Agrochernozems (Haplic Chernozems) of the Western Ukrainian Forest-Steppe

Журнал Белорусского государственного университета: География, геология, 2017
The study found in the Wet Atlantic facies of the Forest-Stepper Сhernozems of Ukraine soil formation leads to the vertical redistribution of Chernozem soil substance and formation of the mineral soil profile differentiated to varying degrees by ...
Ihor Y. Papish
doaj