Results 21 to 30 of about 729 (236)
Mafic High‐Pressure Rocks Are Preferentially Exhumed From Warm Subduction Settings
Geochemistry, Geophysics, Geosystems, 2018 The oceanic crust that enters a subduction zone is generally recycled to great depth. In rare and punctuated episodes, however, blueschists and eclogites derived from subducted oceanic crust are exhumed.
Peter E. vanKeken +4 more
doaj +1 more source
Geologica Carpathica, 2015 The Marziyan granites are located in the north of Azna and crop out in the Sanandaj-Sirjan metamorphic belt. These rocks contain minerals such as quartz, K-feldspars, plagioclase, biotite, muscovite, garnet, tourmaline and minor sillimanite.
Darvishi Esmaiel +3 more
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THE SEDIMENTARY GEOLOGY, REMOTE SENSING, GEOMORPHOLOGY AND PETROLOGY OF MIOCENE TO LATE PLIOCENE SEDIMENTS IN DISTRICT SUDHUNHOTI AND POONCH, AZAD JAMMU AND KASHMIR, PAKISTAN [PDF]
Earth Science Malaysia, 2017 A research work was embarked in the area in order to understand the sedimentary geology, remote sensing, geomorphology and petrology of the district Sudhunhoti and Poonch, Azad Jammu and Kashmir, Pakistan.
Muhammad +3 more
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Frontiers in Earth Science, 2021 The Tuwu porphyry copper deposit is located on the Dananhu-Haerlik island arc in eastern Tianshan, NW China. Based on geology, petrology, and in situ trace element studies of pyrite and chlorite, we redefined the characteristics of hydrothermal fluids ...
Wei Tan +6 more
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Experimental metamorphic petrology
Reviews of Geophysics, 1979 Since Bowen and Tuttle's pioneering study of the system MgO‐SiO2‐H2O in 1949, advances in experimental metamorphic petrology have occurred steadily rather than in “leaps and bounds”. The number and quality of papers published during the past quadrennium, 1975–1978, attests to the health of the science.
openaire +3 more sources
Multifractal model of magnetic susceptibility distributions in some igneous rocks [PDF]
Nonlinear Processes in Geophysics, 2012 Measurements of in-situ magnetic susceptibility were compiled from mainly Precambrian crystalline basement rocks beneath the Colorado Plateau and ranges in Arizona, Colorado, and New Mexico.
M. E. Gettings
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza +4 more
wiley +1 more source
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
Геодинамика и тектонофизика, 2017 In the Chernorud granulite zone in the Olkhon region of West Pribaikalie, we studied gabbro‐pyroxenites composing tectonic plates (Chernorud, Tonta) and synmetamorphic intrusive bodies (Ulan‐Khargana), as well as nu‐ merous disintegrated boudins and ...
A. G. Vladimirov +9 more
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Energy Science &Engineering, EarlyView.On the basis of core and log data, a Bayesian‐Optimized Random Forest model achieved 92.76% accuracy in classifying tight sandstone reservoirs. A gray relational analysis‐derived evaluation index shows > 80% consistency with actual gas zones. ABSTRACT Tight sandstone gas (TSG), an unconventional oil–gas resource, has heterogeneous reservoirs ...
Yin Yuan +8 more
wiley +1 more source