Results 91 to 100 of about 5,874 (174)

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

Composición, estabilidad mineral y acción climática en sedimentos argentinos [PDF]

El objetivo del presente trabajo es estndiar la, estabilidad mineral, en base a la experiencia de los autores sobre la persistencia de minerales en sedimentos argentinos.
Teruggi, Mario Egidio, Andreis, Renato R.   +1 more
core   +1 more source

Study of Diagenesis and Pore Evolution of Triassic Jialingjiang Formation in Southern Puguang Gasfield

Journal of Chemistry, 2016
The second member of Jialingjiang formation is considered to be an important gas reservoir with good exploration prospects in the southern Puguang gasfield. The diagenesis types are analyzed and different diagenetic stages are divided by analyzing carbon
Qi Chen, Quan-wen Liu, Shenjian Wang
doaj   +1 more source

Siliceous sponges or seawater as a silicon source? Tracing silicon burial pathways of the Upper Cretaceous opal‐CT deposits using δ30Si and δ7Li

Sedimentology, EarlyView.
ABSTRACT Classical models of formation of sedimentary siliceous rocks (flint, chert, opoka) commonly assume that the Cretaceous marine silicon (Si) cycle was primarily biologically controlled, broadly analogous to the modern ocean. In this framework, siliceous sponges are regarded as the principal source of dissolved silica (dSi) to sediment porewaters,
Agata Jurkowska, Ewa Świerczewska‐Gładysz, Marek Szczerba, Tomáš Magna, Szymon Kowalik Filipowicz   +4 more
wiley   +1 more source

Organic matter maturation vs clay mineralogy: A comparison for Carboniferous to Eocene sediments from the Alpine – Dinaride junction (Slovenia, Austria)

Geologija, 2002
Clay mineral diagenesis of Carboniferous to Paleogene rocks within the Alpine-Dinaric junction was studied and compared to vitrinite reflectance. Generally, there is a good fit between clay mineral diagenesis and VR. However, clay mineral alterations lag
Thomas Rainer, Uroš Herlec, Gerd Rantitsch, Reinhard F. Sachsenhofer   +3 more
doaj  

Effects of Pretreatment on the Isotopic Composition of Structural Carbonate in Ray‐Finned Fish Teeth [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale The carbon and oxygen stable isotope ratios (δ13C and δ18O) of carbonate contained in fish tooth dentin have the potential to offer insights into environmental and ecological conditions, making them promising targets for analysis in fossil specimens.
Furuya T, Yokouchi K, Okumura T, Shirai K.   +3 more
europepmc   +2 more sources

Hydrodynamics, Diagenesis and Hypoxia Variably Drive Benthic Oxygen Flux in a River‐Reservoir System

Water Resources Research
Benthic oxygen flux with complex spatiotemporal variations is essential for the global budget of carbon dioxide and the regional security of water quality and ecology, but its dominant driver under different circumstances has yet to be identified.
Yuanning Zhang, Xueping Gao, Bowen Sun, Xiaobo Liu   +3 more
doaj   +1 more source

Potencial generador de hidrocarburos en rocas del terciario. Cuenca Oriental de Venezuela

, 2014
Se presenta el estudio de rocas del Terciario de la Cuenca Oriental de Venezuela, con la finalidad de evaluar su potencial como rocas generadoras que pudieron contribuir a la acumulación de hidrocarburos en la Cuenca Oriental de Venezuela.
Lo Mónaco, Guillermo, Escobar, Gastón, López, Liliana, Quintero, Karla, Lugo, Patricia, Kalkreuth, W, Peralba, Maria Do Carmo, Lo Mónaco, Salvador, Franco, Noelia   +8 more
core  

A study of the effects of early diagenesis on the geotechnical properties of carbonate sediments (North West Shelf, Australia)

Scientific Reports
Carbonate sediments are often regarded as problematic in geotechnical engineering due to the high variability of their properties. Understanding and quantifying this variability will become increasingly critical in the years ahead, notably with respect ...
Ulysse Lebrec, Shambhu Sharma, Phil Watson, Rosine Riera, Hackmet Joer, Ryan Beemer, Christophe Gaudin   +6 more
doaj   +1 more source

Petrografía de las rocas sedimentarias.

, 1986
Se llama roca sedimentaria a aquella que se forma como resultado de la acumulación de los productos de la destrucción física, química y la actividad de los organismos, que sufren las diferentes rocas en la superficie terrestre.
Hernández Sarlabous, María Margarita
core