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Fastening in Rock Mass-Structural Design of Shallow Embedded Anchors in Inhomogeneous Substrate.
Materials (Basel)
December 2024
Department of Civil Engineering and Natural Hazards, Institute of Applied Geology, University of Natural Resources and Life Sciences Vienna, Peter-Jordan-Street 82, 1190 Vienna, Austria.
Unlike traditional base materials such as concrete or masonry, there are no guidelines for rock as a base material for post-installed anchors. The varying rock properties (e.g.
View Article and Find Full Text PDFInvestigation of rock genesis and geodynamic significance based on Sr-Yb granite classification and geochemical characteristics: A case study from Guangxi, China.
Heliyon
June 2024
Haikou Marine Geological Survey Center, China Geological Survey, Haikou, 571127, China.
Article Synopsis
- The study categorizes intrusive rock formations into two units based on structural characteristics, identifying granite porphyry and quartz monzonite porphyry as the primary types with ages around 84 and 86 million years, respectively.
- Geochemical analysis classifies these rocks as Zhejiang-Fujian type and Nanling type granites, linked to specific metamorphic conditions of the lower crust and providing insights into continental geological evolution.
- The paper highlights optimal conditions for tungsten-tin mineralization, emphasizing that this process is generally separate from earlier diagenetic processes and occurs at specific temperatures in certain geological settings, especially near fault zones and sedimentary rock contacts.
A comparative review of the mineralogical and chemical composition of African major bauxite deposits.
Heliyon
August 2023
Department of Nuclear Sciences and Applications, School of Nuclear and Allied Sciences, University of Ghana, P.O. Box LG 80, Legon, Accra, Ghana.
Bauxite, which is the main raw material that aluminium is extracted from was discovered in Africa in the early 1900s. Currently, the production and export capacities of the African Bauxite ore are about a third of the World's total capacity. However, the processes leading to the final finished product of; surface mining of the ore, refining ore into alumina and finally extracting the pure aluminium metal in high energy consuming smelters that employ the Hall-Héroult electrolysis process; seldom take place inside Africa.
View Article and Find Full Text PDFGeological Controls on the Gas Content and Permeability of Coal Reservoirs in the Daning Block, Southern Qinshui Basin.
ACS Omega
May 2022
Shanxi Lanhua Sci-tech Venture Co., Ltd., Jincheng 048000, China.
The gas content and permeability of the coal reservoir are the key factors affecting coalbed methane (CBM) productivity. To investigate the geological controls on the permeability and gas content of coal reservoirs in the Daning block, southern Qinshui Basin, geological surveys combined with laboratory experiments, including coal petrology analysis, proximate analysis, and methane isothermal adsorption experiments, were carried out. The results show that the gas content of coals in the Daning block ranges from 5.
View Article and Find Full Text PDFGeochemistry and mineral chemistry of pelitic gneiss of Ikare area, southwestern Nigeria.
Heliyon
December 2021
Department of Earth, Environmental, and Sustainability Sciences, Furman University, USA.
This study conducts Electron Probe Microanalysis (EPMA), X-ray Fluorescence (XRF) and Laser Ablation Inductively Coupled Plasma Spectrometry (LA-ICP-MS) analysis on the pelitic gneiss of the Basement complex of Nigeria. Phase equilibrium modeling was undertaken in the MnO-NaO-CaO-KO-FeO-MgO-AlO-SiO-HO-TiO-O (MnNCKFMASHTO) chemical system using THERMOCALC. The rock comprises of sillimanite + biotite + garnet + K-feldspar + quartz + ilmenite + plagioclase ± cordierite.
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