Results 121 to 130 of about 7,444 (188)

Depositional Facies, Sequence Stratigraphy, and Diagenesis of Lower Cretaceous Carbonate Reservoir, Southern Iraq: Implications for Petroleum Exploration

Journal of Petroleum Geology, Volume 49, Issue 2, Page 312-345, April 2026.
ABSTRACT The Lower Cretaceous Yamama Formation of southern Iraq represents a key carbonate reservoir within Iraq and the Middle East, yet its complex depositional facies architecture and diagenetic alterations present challenges for predicting reservoir quality.
A. K. A. Mohammed, F. Velledits, I. Q. Mohammed, M. Alsuwaidi, H. Mansurbeg, F. Kristály, D. K. Ivanova, Eloi González‐Esvertit, A. Awdal   +8 more
wiley   +1 more source

Development and significance of tectonic foliations in the Hercynian Belt of NW Spain [PDF]

, 1990
[Resumen] En este trabajo se presenta un modelo de distribución y desarrollo de foliaciones en rocas pelíticas y samíticas dentro de un orógeno: el Macizo Herciniano del NW d e España.
Aller, J., Bastida, Fernando, Pulgar, Javier A.   +2 more
core   +1 more source

Growth and reworking of freshwater microbially‐mediated carbonates in wind‐stressed lake margins (Lago Sarmiento, Southern Patagonia)

Sedimentology, Volume 73, Issue 3, Page 706-741, April 2026.
ABSTRACT Understanding the biotic and abiotic influences on the deposition and diagenesis of recent microbial carbonates is crucial for addressing the environmental and ecological significance of ancient organosedimentary structures. This study investigates these factors and their expression in the microstructure of Holocene tufa thrombolites from a ...
Paulo Quezada, Mauricio Calderón, Anelize Bahniuk, Carolina Henríquez, Tatiana Stepanenko, José Pérez‐Donoso, Nicolás Bruna, Larissa Santos, Guilherme Fedalto, Luis Mancini, Leonardo Fadel Cury   +10 more
wiley   +1 more source

Diagenesis and pore evolution of tight reservoirs in glutenite section of Bachu Formation, Tahe Oilfield

Shiyou shiyan dizhi
The tight reservoirs in the glutenite section of the Carboniferous Bachu Formation in the Tahe Oilfield represent an important future exploration target.
Xindong DIAO, Wenping LI, Dong JIANG, Fangfang ZHOU, Zhipeng HUO, Jianbo GAO, Ningliang SUN, Zhifeng CAO, Jianan WANG, Yanan WANG, Zhiwei CHEN, Changyu DONG   +11 more
doaj   +1 more source

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, Volume 73, Issue 3, Page 802-837, April 2026.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

Differing Controls on the Cycling of Neodymium in the Atlantic and the Pacific

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Neodymium (Nd) isotopes ratios are regarded as a key proxy for past ocean circulation despite unsettled debate on marine Nd cycle controls, which opposes a “top‐down” hypothesis (surface sources dominate) and a “bottom‐up” hypothesis (sedimentary sources dominate), each with important implications for Nd isotope proxy interpretation.
Paige M. Wise, Benoît Pasquier, Seth G. John, Sophia K. V. Hines   +3 more
wiley   +1 more source

History of geology: scottish uniformitarianism from the point of view of philosophy of science. Didactic implications [PDF]

, 2016
En este trabajo tratamos de hacer una aproximación a la Historia y Filosofía de la Geología mediante la aplicación del concepto de tradiciones de investigación de L.
Rivero Taravillo, Fernando Jesús
core  

Two‐Stage Dolomite Formation in Carbonate Platforms Revealed by Carbonate Clumped Isotope Thermometry

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract The “dolomite problem” refers to the scarcity of dolomite in Cenozoic marine environments compared with its abundance in earlier strata. This discrepancy has been attributed to changes in marine environments or to insufficient thermal maturity required for dolomite formation.
Y. Levenson, J. M. Eiler, E. Wurgaft, N. Neagu, Y. Ebert, U. Ryb   +5 more
wiley   +1 more source

Estromatolitos pelágicos fosfatados relacionados con discontinuidades estratigráficas en el Cretácico del Penibético (provincia de Málaga) [PDF]

, 1987
En relación con discontinuidades estratigráficas en el Cretácico del Penibético se encuentran estromatolitos pelágicos fosfatados, constituidos por apatito criptocristalino (3 al 45 %).
García-Cervigón Bellón, Alfonso, Martín Algarra, Agustín, Montealegre, L., Vera, J. A.   +3 more
core   +1 more source

Sandstone petrofacies in the northwestern sector of the Iberian Basin [PDF]

During the most active rifting stages in the northwestern sector of the Iberian Basin (Cameros Basin and Aragonese Branch of the Iberian Range), thick sequences of continental clastic deposits were generated.
Arribas, J., Arribas, Mª E., González-acebrón, L., Mas, R., Ochoa, M.   +4 more
core   +1 more source