Results 101 to 110 of about 506,821 (298)

Features of formation of soil element composition in contrast geological conditions (Mzymta r., Black Sea coast of Russia)

open access: yesВестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле
The Mzymta River (Black Sea coast, Russia) erodes different types of rocks. Among them, mudstones, siltstones and shales are predominating, and carbonate and clay-carbonate rocks are present in smaller quantities, and occasionally eruptive rocks are ...
L.V. Zakharikhina
doaj   +1 more source

Lithofacies palaeogeography of the Late Permian Wujiaping Age in the Middle and Upper Yangtze Region, China

open access: yesJournal of Palaeogeography, 2014
The lithofacies palaeogeography of the Late Permian Wujiaping Age in Middle and Upper Yangtze Region was studied based on petrography and the “single factor analysis and multifactor comprehensive mapping” method.
Jin-Xiong Luo, You-Bin He, Rui Wang
doaj   +1 more source

Diagenesis of Carbonate Rocks

open access: yesJournal of the Japanese Association for Petroleum Technology, 1977
Diagenesis is defined as the process involving physical and chemical changes in sediment after deposition that converts it to consolidated rock. Carbonate rocks are mainly composed of carbonate minerals only and have a polygenic origin, and thus are different considerably from clastic and pyroclastic rocks.
openaire   +2 more sources

THE ESTIMATION OF CARBON DIOXIDE IN MINERALS AND ROCKS [PDF]

open access: yesSchool Science and Mathematics, 1906
n ...
openaire   +2 more sources

Tubular Carbonate Concretions from North Island, New Zealand: Evidence for Hydrocarbon Migration and the Subsurface Plumbing System of Cold Seeps [PDF]

open access: yes, 2009
Among the cold seep research community, it is now appreciated that tubular carbonate concretions are important indicators of hydrocarbon migration in the subsurface.
Nyman, Stephanie Leigh
core  

Methods for synthesizing diethyl carbonate from ethanol and supercritical carbon dioxide by one-pot or two-step reactions in the presence of potassium carbonate [PDF]

open access: yes, 2009
Carbon dioxide sequestration was studied by synthesizing diethyl carbonate (DEC) from ethanol and CO2 under supercritical conditions in the presence of potassium carbonate as a base. The co-reagent was ethyl iodide or a concentrated strong acid.
Thiebaud-Roux, Sophie   +3 more
core   +1 more source

Sustainable Plant‐Based Water Repellent Coatings Using Hydrophobic Pine and Palm Pollen

open access: yesAdvanced Materials Interfaces, EarlyView.
A novel formulation strategy for creating superhydrophobic coatings using plant‐derived waxes and chemically treated pine and palm pollen. By employing acid modification, the hydrophobicity of the pollen surface is enhanced, resulting in water contact angles exceeding 150°.
Brenda Resendiz‐Diaz   +2 more
wiley   +1 more source

Metacarbonate rocks of the Paleoproterozoic Khapchan series (southeastern part of the Anabar Shield): mineral and chemical composition, metamorphic conditions

open access: yesЗаписки Горного института
The mineral composition of metacarbonate rocks (silicate marbles and carbonate-silicate rocks) of the Khapchan series (southeastern part of the Anabar Shield) was studied, and the PT (pressure and temperature)-parameters of their formation were ...
Ekaterina Yu. Akimova   +3 more
doaj  

Rapid determination of organic carbon in carbonate rocks.

open access: yesJournal of the Japanese Association for Petroleum Technology, 1990
A rapid method for determination of organic carbon in carbonate rocks has been developed to replace the normal procedure in which carbonate samples are pretreated with hydrochloric acid to decompose carbonate minerals. The method involves dry combustion of organic material in an oxygen stream and subsequent measuring of carbon dioxide (CO2) generated ...
YAMADA, Makoto, MACHIHARA, Tsutomu
openaire   +2 more sources

Palaeoproterozoic magnesite: lithological and isotopic evidence for playa/sabkha environments [PDF]

open access: yes, 2001
Magnesite forms a series of 1- to 15-m-thick beds within the approximate to2.0 Ga (Palaeoproterozoic) Tulomozerskaya Formation, NW Fennoscandian Shield, Russia.
Fallick, A.E.   +8 more
core   +1 more source

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