Results 11 to 20 of about 218,762 (405)

Aragonite dissolution protects calcite at the seafloor

Nature Communications, 2022
In the open ocean, calcium carbonates are mainly found in two mineral forms. Calcite, the least soluble, is widespread at the seafloor, while aragonite, the more soluble, is rarely preserved in marine sediments.
O. Sulpis, Priyanka Agrawal, Mariette Wolthers, G. Munhoven, M. Walker, J. Middelburg   +5 more
semanticscholar   +1 more source

State-of-the-Art Review of the Applicability and Challenges of Microbial-Induced Calcite Precipitation (MICP) and Enzyme-Induced Calcite Precipitation (EICP) Techniques for Geotechnical and Geoenvironmental Applications

Crystals, 2021
The development of alternatives to soil stabilization through mechanical and chemical stabilization has paved the way for the development of biostabilization methods.
A. Almajed, M. Lateef, A. Moghal, Kehinde Lemboye   +3 more
semanticscholar   +1 more source

Mineralogy of interior jewellery ammonites of the Samara region

Известия высших учебных заведений: Геология и разведка, 2022
Background. Ammonite products are increasingly gaining in popularity. Ammonites are characterised by a variety of colour shades, shapes and sizes, making them suitable for manufacturing a wide range of souvenir and jewellery products.
D. A. Petrochenkov, E. Yu. Baraboshkin
doaj   +1 more source

Apache Calcite: A Foundational Framework for Optimized Query Processing Over Heterogeneous Data Sources [PDF]

SIGMOD Conference, 2018
Apache Calcite is a foundational software framework that provides query processing, optimization, and query language support to many popular open-source data processing systems such as Apache Hive, Apache Storm, Apache Flink, Druid, and MapD. The goal of
Edmon Begoli, Jesús Camacho-Rodríguez, Julian Hyde, Michael J. Mior, D. Lemire   +4 more
semanticscholar   +1 more source

Application of ASTER Data for Differentiating Carbonate Minerals and Evaluating MgO Content of Magnesite in the Jiao-Liao-Ji Belt, North China Craton

Remote Sensing, 2022
Numerous reports have successfully detected or differentiated carbonate minerals such as calcite and dolomite by using the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER).
Young-Sun Son, Gilljae Lee, Bum Han Lee, Namhoon Kim, Sang-Mo Koh, Kwang-Eun Kim, Seong-Jun Cho   +6 more
doaj   +1 more source

Fluid evolution in CM carbonaceous chondrites tracked through the oxygen isotopic compositions of carbonates [PDF]

, 2017
The oxygen isotopic compositions of calcite grains in four CM carbonaceous chondrites have been determined by NanoSIMS, and results reveal that aqueous solutions evolved in a similar manner between parent body regions with different intensities of ...
Alexander, Alexander, Barber, Benedix, Bland, Bonal, Bunch, Burbine, Clark, Clayton, Clayton, de Leuw, DuFresne, Emery, Fujiya, Fujiya, Guo, Hewins, Horita, Howard, I.A. Franchi, Jenniskens, Johnson, Kasuga, Lauretta, Lee, Lee, Lee, Lee, Lee, Lee, Lindgren, Lindgren, M.R. Lee, Marrocchi, McSween, McSween, N.A. Starkey, P. Lindgren, Palguta, Rubin, Rubin, Starkey, Tomeoka, Tyra, Tyra, Tyra, Velbel, Young, Young   +49 more
core   +2 more sources

The Biology and Evolution of Calcite and Aragonite Mineralization in Octocorallia

Frontiers in Ecology and Evolution, 2021
Octocorallia (class Anthozoa, phylum Cnidaria) is a group of calcifying corals displaying a wide diversity of mineral skeletons. This includes skeletal structures composed of different calcium carbonate polymorphs (aragonite and calcite). This represents
Nicola Conci, Sergio Vargas, Gert Wörheide, Gert Wörheide, Gert Wörheide   +4 more
doaj   +1 more source

Refining the interpretation of lacustrine carbonate isotope records: Implications of a mineralogy-specific Lake Van case study [PDF]

, 2019
Oxygen and carbon isotope (δ18O and δ13C) data from bulk carbonates are widely applied proxies for temperature, the precipitation/evaporation ratio and productivity in lacustrine palaeohydrology and palaeoclimatology. In case of the terminal and alkaline
Immenhauser, Adrian, Jöns, Niels, Kwiecien, Ola, McCormack, Jeremy, Nehrke, Gernot   +4 more
core   +1 more source

The impact of calcite impurities in clays containing kaolinite on their reactivity in cement after calcination

, 2020
The use of supplementary cementitious materials as a partial replacement for Portland cement is the most effective way to reduce the carbon footprint of the concrete industry. Raw clays containing kaolinite (kaolin) are promising substitute materials. In
F. Zunino, E. Boehm-Courjault, K. Scrivener   +2 more
semanticscholar   +1 more source

NaHCO3 as a carrier of CO2 and its enhancement effect on mineralization during hydrothermal alteration of basalt

Frontiers in Environmental Science, 2023
Reaction of carbon dioxide (CO2) with minerals to generate stable carbonates, also known as CO2 mineralization, has been regarded as one of the most promising methods for safe and permanent carbon storage.
Sena Kikuchi, Jiajie Wang, Otgonbayar Dandar, Masaoki Uno, Noriaki Watanabe, Nobuo Hirano, Noriyoshi Tsuchiya   +6 more
doaj   +1 more source