Results 111 to 120 of about 5,874 (174)

Permian sedimentary sequence containing analcimolite and authigenic aegirine from the Boskovice Basin (Bohemian Massif, Czechia)

The Depositional Record, Volume 12, Issue 5, November 2026.
The Permian freshwater lacustrine sedimentary sequence rich in analcime, with unusual authigenic aegirine and NaFe3+ clinopyroxene. Product of ashfall directly linked with fossil accumulation (Konzentrat‐Lagerstätte). Abstract The Early Permian freshwater lacustrine sedimentary sequence in the vicinity of Bačov (Czechia) is world‐famous for its rich ...
Jakub Jirásek, Dalibor Matýsek, Martin Kašing, Daniel Šimíček   +3 more
wiley   +1 more source

Laboratory Experiments Identify Meteoritic Organic Precursors for Chlorinated Compounds Detected by the Sample Analysis at Mars (SAM) Instrument at Gale Crater

Journal of Geophysical Research: Planets, Volume 131, Issue 11, November 2026.
Abstract The Viking missions landed two spacecraft on Mars each equipped with a pyrolysis‐gas chromatograph‐mass spectrometer system capable of detecting signs of life. Although working as intended, detections of chloromethane and dichloromethane were initially attributed to terrestrial contamination.
A. Mojarro, J. Herrera, A. Sistiaga, S. S. O’Reilly, J. C. Aponte, A. Buch, J. L. Eigenbrode, D. P. Glavin, C. Freissinet, M. Millan, C. Szopa, R. E. Summons   +11 more
wiley   +1 more source

El metamorfismo del Paleozoico en la isla de Menorca, Isla Baleares

, 1992
[ES] Los materiales paleozoicos del área Hercínica de Menorca han experimentado un metamorfismo bajo y muy bajo grado (Carbonífero en tránsito a diagénesis (Devónico), cuyas características son establecidas.
Brell, J. M., García, R., Aparicio, Alfredo   +2 more
core  

Agent‐Based Modelling of Microbialite Formation Through Sedimentation and Precipitation Dynamics

Geobiology, Volume 24, Issue 6, November/December 2026.
ABSTRACT Fossil microbialites resulting from the interplay of sedimentation and precipitation are among the oldest evidence of life on Earth and help geobiologists to interpret many sedimentary environments. However, the factors governing their internal structure and external morphology are still poorly understood.
Niall Rodgers, Laurane Fogret, Mark van Zuilen, H. James Cleaves, Sudha Rajamani, Sean McMahon   +5 more
wiley   +1 more source

Million‐Year Scale Hydrothermal and Hydrocarbon Evolution Hosted Within Stratified Thermohydraulic Systems in Sedimented Ultraslow‐Spreading Settings, Svyatogor and Vestnesa Ridges

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Hydrothermal systems at ultraslow‐spreading ridges are poorly understood, especially where thick sediments overlay detachment faults. The International Ocean Discovery Program Expedition 403 obtained the longest sediment record in Atlantic‐Arctic ultraslow‐spreading systems, reaching ∼628 m below the seafloor.
Y. Sakai, Y. Fukamatsu, V. J. Clementi, Y. Rosenthal, J. Gruetzner, S. Bünz, A. Plaza‐Faverola, K. St. John, R. G. Lucchi, T. A. Ronge, O. Libman‐Roshal, L. Monito, Y. Liu, M. Iizuka, L. Duxbury, L. Haygood, O. Tadai, G.‐I. Uramoto, W. Lin, Expedition 403 Shipboard Scientists   +19 more
wiley   +1 more source

Geología y geoquímica de las dolomías del Miembro O de la Formación Escandalosa de la cuenca de Barinas, Venezuela. Núcleo del pozo BOR 12X.

, 2015
En el siguiente trabajo de investigación se llevó a cabo un estudio sobre la geología y geoquímica de las dolomías del Miembro O de la Formación Escandalosa.
Fajardo Jiménez, Luis Damián
core   +1 more source

Sandy Turbidity Current Acts as a Rusty Carbon Pump at the Shelf Edge

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Sandy turbidity currents (STCs) efficiently sequester organic carbon (OC) through rapid burial. Yet our understanding of OC preservation within STC deposits remains far less constrained, especially considering STC deposits as an inferred major sink for iron‐bound OC (Fe‐OC), a long‐term stabilized form of OC.
Zhuoyue Zhang, Chenglong Wang, Tianyu Chen, Rui Bao, Zicheng Chen, Xiao Huang, Yang Zhang, Xinqing Zou   +7 more
wiley   +1 more source

Procesos de disolución-cristalización de biocarbonatos en ambientes superficiales y diagenéticos

Muchos indicadores utilizados en reconstrucciones paleogeográficas, paleoambientales y paleoclimáticas se basan en información geoquímica almacenada en biocarbonatos fósiles. La diagénesis puede alterar esta información.
Fernández Díaz, María Lourdes
core   +1 more source

Effect of Laboratory Reagents for Cleaning Modern Contamination on the δ15N Integrity of Nitrogen‐Poor Samples

Rapid Communications in Mass Spectrometry, Volume 40, Issue 19, 15 October 2026.
ABSTRACT Rationale Nitrogen isotope values have been widely used for tracing ancient biogeochemical processes, but contaminant‐sensitive materials, such as Precambrian sedimentary rocks, meteorites, or returned extraterrestrial samples, often have low nitrogen levels and are thus vulnerable to modern organic contamination.
Kunmanee Bubphamanee, Andrew Schauer, Roger Buick   +2 more
wiley   +1 more source

Diagenetic events of the galembo member of the la luna formation in a well in the magdalena medium valley basin and its relationship with unconventional reservoirs*

, 2018
La Formación La Luna es considerada la roca generadora más importante en la cuenca Valle Medio del Magdalena (VMM), sin embargo, es poca la información disponible enfocada a la definición de su mineralogía y diagénesis. Con base en análisis detallados de
Pedraza Cristancho, Lina Marcela
core