Results 51 to 60 of about 26,623 (334)
Petrographic and Lithofacies of Injana Formation Berman Inticline Northern Iraq
Tikrit Journal of Pure Science, 2023 This study is including Petrographic and Lithofacies investigation of Injana Formation North Iraq. The Formation composed of succession of sandstone, siltstone and claystone cycles.
Amaar J. Mohammed Al-Taiiy
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Granulite metamorphism of pelitic rocks adjacent to the Bushveld complex contact in the Northeastern Transvaal area, South Africa [PDF]
, 2000 Orthopyroxene-bearing pelitic hornfels (opx hornfels) is observed in the highest-grade contact metamorphic aureole of the Bushveld Complex in the northeastern Transvaal, South Africa.
Mizuno Kohei, 水野 耕平
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Deep Underground Science and Engineering, EarlyView.Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang +4 more
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Zinc Contents of Mafic Micerals in Granitic Rocks, with Special Reference to Ore Chemistry [PDF]
, 2003 In order to know the reason why the Cu/Zn-Pb ratios of skarn-type deposits related with the ilmenite-series granitic rocks are markedly higher than those related with the magnetite-series, comparative mineralogical studies were carried out for the two ...
Inoue, Yoshinori +2 more
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Deep Underground Science and Engineering, EarlyView.Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang +6 more
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Petrography and Synsedimentary Processes of Carbonate beds of Fat’ha Formation. In selected sections at Al-Qayyara area, south of Mosul, Northern Iraq. [PDF]
Kirkuk Journal of Science, 2017 Fatha was studied in two sections at Alqayyara area southern of Mosul. Petrographically, Sands Fatha indicated composed of quartz monocrystalline and polycrystalline type, while the feldspar forming mostly of plagioclace feldspar and K-feldspar.
Muthanna Y.M
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Frontiers in Earth Science, 2023 K-feldspar luminescence dating has been widely applied to constrain the timing of Quaternary sedimentation in different environments. However, the measurements are time-consuming.
Yan Li +6 more
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Pyrometamorphic process of ceramic composite materials in pottery production in the Bronze/Iron Age of the Northern Caucasus (Russia) [PDF]
, 2019 Pyrotechnology for the prehistoric pottery has been an important subject for the study of ancient production technology and technological styles. However, heterogeneous characteristics in chemical and mineralogical compositions and massive amounts of ...
Efthimiopoulos, Ilias +4 more
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Exploring wave propagation behaviors in rock: A grain‐based perspective on mineral structures
Deep Underground Science and Engineering, EarlyView.This study investigates wave propagation in rock at the grain scale using a grain‐based model, revealing that mineral elastic modulus significantly influences wave attenuation while grain size and distribution have limited effects. A novel peak particle velocity attenuation prediction model is proposed and validated for grain‐scale wave propagation ...
Zhiyi Liao +3 more
wiley +1 more source
MORPHOLOGICAL NOTES ABOUT AMAZONITE [PDF]
Минералогия, 2018 Morphological features of amazonite cause some onthogenic models of K-feldspars. The crystals of amazonite are zonal and sectorial. «Microcline lattice» of stresses in K-feldspar is formed after its growth during polymorphic transformation of monoclinic ...
V.A. Popov
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