Results 71 to 80 of about 7,350 (205)

Six Ca‐Mg‐Fe Carbonate Reference Materials for In Situ Measurement of Oxygen and Carbon Isotope Ratios

Geostandards and Geoanalytical Research, EarlyView.
Key Points Six new Ca‐Mg‐Fe carbonate reference materials are available to the global geochemical community for calibrating oxygen and carbon isotope ratios by SIMS. Significant compositional matrix effects were observed in the dolomite‐ankerite and magnesite‐siderite series during SIMS analysis. Compositional matrix effects correlate with Fe variation.
Maria Rosa Scicchitano, Chris Harris, Julie Luyt, Andreas Pack, Tommaso di Rocco, Torsten Vennemann, Franziska D.H. Wilke, Anja M. Schleicher, Johannes Glodny, Kimberly T. Tait, Simon Philippo   +10 more
wiley   +1 more source

Control of oolitic beaches sedimentation and diagenesis on the reservoirs in Feixianguan Formation, northeastern Sichuan Basin

Petroleum Exploration and Development, 2012
Based on well correlation, division of sedimentary facies and microfacies, core observation, and analysis of rock thin sections, the authors comparatively analyzed the sedimentation and diagenesis of the oolitic beaches in the Puguang and Yuanba areas of
Yunlan HE, Xiaoyue FU, Bo LIU, Minghui ZHOU, Xuefeng ZHANG, Jixian GAO, Yunkun YANG, Kaibo SHI   +7 more
doaj   +1 more source

Diagenetic processes in Quaternary fossil bones from tropical limestone caves

Scientific Reports, 2020
Quaternary fossils from limestone caves bear various diagenetic features due to the complex nature of sedimentary processes. However, few studies have addressed the problem of diagenetic changes in fossils from tropical-wet environments.
Daniel Vieira de Sousa, Estevan Eltink, Raquel Aline Pessoa Oliveira, Jorlandio Francisco Félix, Luciano de Moura Guimarães   +4 more
doaj   +1 more source

New Potential Haematite and Magnetite Reference Materials for Iron Isotope Measurements by Solution Nebulisation MC‐ICP‐MS and by In Situ ns‐LA‐MC‐ICP‐MS

Geostandards and Geoanalytical Research, EarlyView.
Key Points Two haematite and magnetite materials were developed as potential Fe isotope reference materials. Solution and in situ LA‐MC‐ICP‐MS analyses yielded consistent δ56Fe values. Both materials are isotopically homogeneous and suitable for in situ Fe isotope calibration.
Jialu Yu, Marcus Oelze, Mathias Schannor, Simon Nordstad, Jochen Vogl   +4 more
wiley   +1 more source

Procedencia y modelo diagenético de las areniscas de Facies Utrillas en la cordillera Ibérica (Umbral de Ateca) y la meseta norcastellana [PDF]

, 1992
Las facies Utrillas de la Cordillera Ibérica, en los alrededores del Umbral de Ateca y en la Meseta norcastellana, provincia de Soria, son un depósito detrítico formado en un ambiente sedimentario de sistemas aluviales que se puede subdividir en dos ...
Gómez-Gras, D., Marfil, Rafaela
core   +2 more sources

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

Journal of Petroleum Geology, EarlyView.
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

Three-dimensionally preserved graptolites from the Silurian of the Central Iberian Zone (Spain and Portugal) [PDF]

, 2014
[ES] Los graptolitos silúricos de la Zona Centroibérica suelen conservarse aplastados en pizarras negras, pero en algunos yacimientos los rabdosomas pueden retener parte de su relieve original o conservarse incluso en tres dimensiones.
Gutiérrez-Marco, J. C., Lorenzo, Saturnino, Piçarra, José Manuel   +2 more
core  

Diagenetic evolution characteristics of Paleogene lacustrine carbonate reservoirs in central Bohai sea, China

Journal of Natural Gas Geoscience, 2018
The distribution of high-quality reservoirs in Shahejie Formation of the Shijiutuo Uplift, Central Bohai Sea, is the key factor to determine the oil and gas accumulation.
Zhengxiang Lv, Yuanhua Qing, Fu Zhao, Jiayang Wu, Xiandong Wang   +4 more
doaj   +1 more source

Concreciones carbonatadas en margas del Eoceno: consecuencias geomorfológicas [PDF]

, 1996
[Resumen] Las margas del Eoceno de la cuenca de Jaca (Pirineo Central) presentan, en numerosos lugares, una topografía de detalle muy característica, en la que destacan un conjunto de núcleos más resistentes de aspecto frecuentemente esférico y de orden ...
Martí Bono, C., Plana, F.
core   +1 more source

The effect of early diagenetic processes on the quantification of fossil micrometeorite abundance and flux in the geological record

Meteoritics &Planetary Science, EarlyView.
Abstract Fossil micrometeorites (MMs) recovered from lithified sedimentary rocks, particularly iron‐rich (I‐type) cosmic spherules (CSs) provide valuable insights into past dust‐forming events. Their abundances, when combined with estimates of local sedimentation rates can be used to reconstruct the flux of extraterrestrial dust.
Isabelle S. Mattia, Matthew J. Genge, Martin D. Suttle   +2 more
wiley   +1 more source