Results 21 to 30 of about 1,340 (151)

Petrography and Mineral Chemistry of Magmatic and Hydrothermal Biotite in Porphyry Copper-Gold Deposits: A Tool for Understanding Mineralizing Fluid Compositional Changes During Alteration Processes

Indonesian Journal on Geoscience, 2018
DOI: 10.17014/ijog.5.1.47-64This study aims to understand the petrography and chemistry of both magmatic and hydrothermal biotites in porphyry copper-gold deposits, and to evaluate the fluid compositional changes during alteration processes.
Arifudin Idrus
doaj   +1 more source

The Polumir granite: Addititional data on its origin [PDF]

Geološki Anali Balkanskoga Poluostrva, 2002
The Polumir granite is exposed on several localities due to erosion, and its chemical and mineral composition is presented in this paper. It is built of K-feldspar, plagioclase, myrmekite, metasomatic albite, biotite, muscovite and quartz, while apatite,
Vukov Milenko S., Milovanović Dragan
doaj   +1 more source

Determination of physicochemical conditions of causative intrusion in the Masjeddaghi Cu-Au porphyry-epithermal deposit: constraints on chemical composition of biotite

Journal of Economic Geology, 2022
The Masjeddaghi porphyry-epithermal Cu-Au deposit has located in the western part of the Alborz-Azarbaijan zone; in the south margin of Lesser Caucasus.
Shohreh Hassanpour, Zohreh Rahnama, Susan Ebrahimi   +2 more
doaj   +1 more source

Hubungan Kumpulan Mineral Berat pada Sedimen Pantai dan Lepas Pantai dengan Batuan Asal Darat di Perairan Teluk Pelabuhan Ratu, Jawa Barat

Indonesian Journal on Geoscience, 2014
DOI: 10.17014/ijog.v5i1.93Based on the depth contour, the sea bottom morphology in southern part of the researched area is very steep, while in the northern area it is sloped slightly.
Deny Setiady
doaj   +1 more source

Temporal Dynamics of Potassium Release from Waste Mica as Influenced by Potassium Mobilizing Bacteria

Journal of Pure and Applied Microbiology, 2023
Potassium mobilizing bacteria (KMB) strains have been isolated from waste mica mines in the Giridih district of Jharkhand, India, using Alexandrov media.
Saibal Ghosh, Sandip Mondal, Sonali Banerjee, Abhishek Mukherjee, Pradip Bhattacharyya   +4 more
doaj   +1 more source

A literature review on thermodynamic sorption models of radionuclides with some selected granitic minerals

Frontiers in Nuclear Engineering, 2023
The literature for radionuclide sorption on four common granitic minerals have been surveyed. Mainly, such studies were modelling using Thermodynamic Sorption Models were investigated. Although the studies give a far from concerted results, they agree on
Stellan Holgersson, Pawan Kumar
doaj   +1 more source

Effects of Microbial-Mineral Interactions on Organic Carbon Stabilization in a Ponderosa Pine Root Zone: A Micro-Scale Approach

Frontiers in Earth Science, 2022
Soil microbial communities affect the formation of micro-scale mineral-associated organic matter (MAOM) where complex processes, including adhesion, aggregate formation, microbial mineral weathering and soil organic matter stabilization occur in a narrow
Alice C. Dohnalkova, Malak M. Tfaily, Malak M. Tfaily, Rosalie K. Chu, A. Peyton Smith, Colin J. Brislawn, Tamas Varga, Alex R. Crump, Libor Kovarik, Linda S. Thomashow, James B. Harsh, C. Kent Keller, Zsuzsanna Balogh-Brunstad   +12 more
doaj   +1 more source

Mineral Chemistry of Chlorite Replacing Biotite from Granitic Rocks of the Canadian Appalachians [PDF]

Journal of Sciences, Islamic Republic of Iran, 2009
Chlorite flakes, as a product of alteration of biotite, the dominant ferromagnesian mineral in the Paleozoic granitic rocks of the Canadian Appalachians, have been analyzed by electron microprobe for major elements and by 57Fe M?ssbauer spectroscopy for ...
A.A. Tabbakh Shabani
doaj  

Increase in cation exchange capacity by the action of maize rhizosphere on Mg or Fe biotite-rich rocks

Pesquisa Agropecuária Tropical, 2022
The weathering of some silicate minerals in crushed rocks may occur in a few days of cropping and generate different physicochemical properties, with potential benefits to tropical soils.
Luise Lottici Krahl, Giuliano Marchi, Simone Patrícia Aranha Paz, Rômulo Simões Angélica, José Carlos Sousa-Silva, Leonardo Fonseca Valadares, Éder de Souza Martins   +6 more
doaj   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source