Results 41 to 50 of about 2,363 (234)
Bibechana, 2018 Present research work was focused to investigate the firing temperature effects on mineralogical phase composition of nine clay bricks collected from the brick factory of Kathmandu valley using X-ray diffraction (XRD) patterns and Fourier transform ...
Narendra Bahadur Bohara +4 more
doaj +3 more sources
Concentration of K-feldspar from a pegmatitic feldspar ore by flotation
International Journal of Mineral Processing, 2006 Abstract Abundant reserves of Na-feldspar (albite) and K-feldspar (orthoclase or microcline) are found in granites, syenite, tracite and pegmatites. As both feldspar minerals have similar chemical structure and physicochemical properties, their separation is challenging. Flotation is known to be the only technique to enable their separation.
Karagüzel, Cengiz +4 more
openaire +5 more sources
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 +8 more
wiley +1 more source
Modern sands of the Gulf of Mexico: Discriminating fluvial and coastal sand composition
Ciencias Marinas, 2003 A forward stepwise linear discriminant analysis, A-Nova test and R-mode factor analysis were used on modern beach, dune and river sands to discriminate the geographic distribution of detrital modes between sands sourced by volcanic rocks (Trans-Mexican
JJ Kasper-Zubillaga, A Carranza-Edwards
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.The tensile strength of granite, a proposed host for nuclear waste, degrades severely above 400°C. We link this to specific microcracking patterns captured by acoustic emission, establishing a scientific basis for assessing repository safety under thermal load.
Wei Zeng +7 more
wiley +1 more source
Processing of hornblende syenite for ceramics [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2010 The purpose of this research is to preliminarily study the hornblende syenite processing. The study includes characterization,separation and evaluation.
Chairoj Rattanakawin +3 more
doaj
Earth, Planets and Space, 2018 Magnetic mineral inclusions in silicates are widespread in sediments as well as in igneous rocks. Because they are isolated from surrounding environment, they have potential to preserve original magnetic signature even in chemically altered sediments ...
Yoichi Usui +2 more
doaj +1 more source
Energy Science &Engineering, EarlyView.This study mainly explores the instability characteristics of roadways near faults in the working face. Taking the 51104 transportation roadway of the 51104 working face in Shengxin Coal Mine as the main research object, through theoretical analysis, borehole inspection, numerical simulation and on‐site mine pressure observation, the instability ...
Shuaifeng Yin +4 more
wiley +1 more source
Geological Journal, EarlyView.Integrated petrographic, mineralogical and geochemical data from the Hastanetepe Pb–Zn deposit (Balya, Türkiye) reveal multi‐stage hydrothermal alteration and a magmatic sulphur source. Fluid inclusion and sulphur isotope results indicate a complex fluid evolution responsible for skarn‐type Pb–Zn mineralization along limestone–dacite contacts ...
Esra Ünal‐Çakır
wiley +1 more source
Identification of Some Gem-Quality Red and Green Feldspars
CrystalsSunstone is a member of the feldspar group. Natural sunstones from Oregon exhibit unique optical effects and hold significant market value. However, since 2008, there has been a persistent issue of diffused red feldspars masquerading as natural sunstones
Zhongyi Shang +2 more
doaj +1 more source