Results 41 to 50 of about 10,620 (270)

Luminescence properties of minerals in the Strzegom granites

Science, Technology and Innovation
This study presents the luminescence properties of minerals occurring in the Strzegom granites using cathodoluminescence in a Scanning Electron Microscope (SEM-CL).
Sylwia Gąsior, Wojciech Panna, Jarosław Cyboroń, Radosław Madej, Magdalena Szumera, Sabina Dolenec   +5 more
doaj   +1 more source

(Table 4) Geochemistry of feldspars at DSDP Leg 66 Holes

, 1982
(Table 4) Geochemistry of feldspars at DSDP Leg 66 ...
Thisse, Yves, André Pouclet (6959009), Jean-Paul Cadet (6959015), Jacques Marie Bardintzeff (6966665), Cadet, Jean-Paul, Pouclet, André, Stephan, J F, J F Stephan (6966311), Bardintzeff, Jacques Marie, Yves Thisse (6966662)   +9 more
core   +1 more source

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

A Study of Na/K Feldspar Solid Solution Using Statistical Mechanics [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 1991
Thermal behavior of various solid feldspars are different, namely those of bivalent cations show no change in the distribution of Al and Si atoms, whereas feldspars of univalent cations become more disordered with raising temperature.
Gholam Abbas Parsafar, Y. Ghayeb
doaj  

(Table 4) Geochemistry of feldspars at DSDP Leg 73 Holes

, 1984
(Table 4) Geochemistry of feldspars at DSDP Leg 73 ...
Volker Dietrich (6886079), J. Sommerauer, M F Carman (6962723), Sommerauer, J, J Sommerauer (6962726), Carman, M F, Dietrich, Volker, M.F. Carman, V.J. Dietrich   +8 more
core   +1 more source

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

Feldspar alteration by disequilibrium CO₂-H₂O fluids in reservoir sandstones: implications for CCS [PDF]

Solid Earth
Understanding how the minerals in reservoir rocks respond to CO2 injection is vital for the success and safety of Carbon Capture and Storage (CCS) projects. Feldspars are the most common mineral in the Earth's crust and act as primary framework grains in
N. J. C. Farrell, L. Yang, M. J. Flowerdew, C. Mark, C. Mark, B. Ardo, K. G. Taylor, N. Bigaroni, M. Pointon, L. Hughes, J. Waters, L. Paul   +11 more
doaj   +1 more source

Barium feldspars of pyrrhotite ore from Bušín [PDF]

, 2012
Ba-feldspars of pyrrhotite ore from Bušín in Zábřeh unit were studied. These ores with massive to smudge-like textures are hosted by strongly altered amphibolites. Ba-rich feldspars form grains and porphyroblasts in pyrrhotite ore.
Mandovec, Václav, Losos, Zdeněk
core  

(Table 7) Microchemistry of feldspars at DSDP Site 89-585

, 1986
(Table 7) Microchemistry of feldspars at DSDP Site 89 ...
Coulon, Hervé, Debrabant, Pierre, Hervé Coulon (6971717), T. Holtzapffel, Hervè Chamley (6971678), Pierre Debrabant (6958550), Chamley, Hervè, H. Coulon, H. Chamley, Holtzapffel, Thierry, P. Debrabant, Thierry Holtzapffel (6971720)   +11 more
core   +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