Results 41 to 50 of about 13,826 (203)

Study on the composite fracture characteristics of filling and reinforcing cracked rock mass after high temperature damage

Deep Underground Science and Engineering, EarlyView.
Cement infill shares compressive and shear stresses during loading, while interfacial friction hinders crack propagation and reduces stress concentration, improving the rock's load‐bearing capacity. Failure modes vary with crack inclination. Unfilled specimens show four modes.
Shihao Yuan, Qiang Sun, Jianjun Hu, Liwei Zhang, Jishi Geng   +4 more
wiley   +1 more source

A critical evaluation of two-pyroxene thermometry in Adirondack granulites [PDF]

, 1979
Temperatures have been calculated from the composition of sixty-five coexisting ortho- and clinopyroxene pairs from the Adirondacks, New York, using calibrations proposed by Wood & Banno (1973), Ross & Huebner (1975), Saxena (1976) and Wells ...
Essene, Eric J., Bohlen, Steven R.
core   +1 more source

​40Ar/39Ar geochronology of terrestrial pyroxene

, 2018
Geochronological techniques such as U/Pb in zircon and baddeleyite and 40Ar/39Ar on a vast range of minerals, including sanidine, plagioclase, and biotite, provide means to date an array of different geologic processes.
Ware, B., Fred Jourdan, Jourdan, Fred, Bryant Ware   +3 more
core   +2 more sources

KIMBERLITE-LIKE ROCKS OF THE URIK-IYA GRABEN, EASTERN SAYAN REGION: MINERAL COMPOSITION, GEOCHEMISTRY AND FORMATION CONDITIONS

Геодинамика и тектонофизика, 2020
The study of the Bol’shaya Tagna alkaline-carbonatite massif and adjacent areas was focused on the mineral and chemical compositions of minerals, the distribution of petrogenic and trace elements in pyroxene-free alkaline picrites in veins and dikes ...
V. B. Savel'eva, Yu. V. Danilova, E. P. Bazarova, B. S. Danilov   +3 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

Preparation of High Strength Ceramic Materials from Titanium-bearing Blast Furnace Slags

Kuangchan zonghe liyong
This is an article in the field of mineral materials. In order to explore the large-scale and high-value application of titanium-containing blast furnace slags in the ceramic field, through the design based on CaO-SiO2-MgO(15%)-Al2O3 phase diagram, and ...
Shuqin LI, Shaoguang HUA, Xiangmei LI, Dejian PEI, Daya WANG   +4 more
doaj   +1 more source

Application of X-ray Diffraction, X-ray Fluorescence Spectrometry and Electron Microprobe in the Identification of Basalt

Yankuang ceshi, 2015
Basalt identification is usually performed by microscope, so the appraisal results are easily influenced by personal professional level and subjective factors.
XU Nai-cen, SHEN Jia-lin, ZHANG Jing
doaj   +1 more source

Lunar Terrestrial Analog Experiment on the Spectral Interpretations of Rocks Observed by the Yutu-2 Rover

Remote Sensing, 2022
A visible and near-infrared imaging spectrometer (VNIS) loaded by the Chang’e-4 rover is the primary method for detecting the mineral composition of the lunar surface in the landing region.
Rui Chang, Wei Yang, Honglei Lin, Rui Xu, Sheng Gou, Rong Wang, Yangting Lin   +6 more
doaj   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

Geological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid, Hafiz U. Rehman, Hao‐Yang Lee, Sun‐Lin Chung, Kaushik Das, Kazumasa Aoki, Muhammad Jawad Zeb, Nasir Ahmad, Muhammad Hussain, Hiroshi Yamamoto   +9 more
wiley   +1 more source