Results 91 to 100 of about 188,153 (288)
INTERRELATIONS BETWEEN MALACHITE AND PSEUDOMALACHITE IN THE MEDNORUDYANSKOE DEPOSIT (CENTRAL URALS) [PDF]
Минералогия, 2015 The examples of consecutive and alternated crystallization of malachite and pseudomalachite in zonal crusts, stalactites, and stalagmites of Mednorudyanskoe deposit are reviewed. Special attention paid to indicators of cocrystallization of these minerals
V.I. Popova, V.A. Popov, I.A. Blinov
doaj
Airborne infrared mineral mapping survey of Marysvale, Utah [PDF]
Infrared spectroradiometer survey results from flights over the Marysvale, Utah district show that hydrothermal alteration mineralogy can be mapped using very rapid and effective airborne techniques.
Chang, S. H., Collins, W.
core +1 more source
The importance of mineralogical knowledge in the sustainability of artisanal gold mining: a mid-south Peru case [PDF]
, 2019 Mineralogy and gold processing techniques from several mining areas of the Nazca-Ocoña gold belt, Mid-South Peru, were investigated to assess the efficiency of gold extraction methods in relation to their mineralogy.
Alfonso Abella, María Pura +7 more
core +2 more sources
Temperature‐dependent shear behavior and constitutive model of the rock–concrete interface
Deep Underground Science and Engineering, EarlyView.Shear tests were conducted to investigate the temperature‐dependent shear behavior of the rock–concrete interface, highlighting the interaction between the surrounding rock and the lining during tunnel fires. Under experimental conditions, concrete exhibited greater temperature sensitivity than rock, with the shear fracture surface transitioning from ...
Hongbin Chen +6 more
wiley +1 more source
STRUCTURE AND COMPOSITION OF KENYAITE AFTER THERMAL ANNEALING [PDF]
Минералогия, 2018 Kenyaite Na2Si22O41(OH)8•6H2O previously found at the cacholong occurrence in the Orenburg region (South Urals) was studied using physicochemical methods.
M.V. Shtenberg +4 more
doaj
An ion probe study of the sulphur isotopic composition of Fe-Ni sulphides in CM carbonaceous chondrites [PDF]
, 2004 From the Introduction: The CM chondrites have endured variable degrees of aqueous alteration [1] which has changed their original mineralogy. A detailed study of the petrology and mineralogy of the sulphides in a suite of increasingly aqueously altered ...
Bullock, E. S. +4 more
core +1 more source
Deep Underground Science and Engineering, EarlyView.The effects of grout strength and thickness on the shear behavior of bolt–grout interfaces (BGI) under constant normal stiffness conditions are investigated. Shear strength, failure modes, and acoustic emission characteristics are examined. The findings reveal that grout strength exerts a significantly greater influence on BGI shear strength and ...
Sunhao Zhang +5 more
wiley +1 more source
SYNTAXY OF TITANITE, AEGIRINE AND ECKERMANNITE IN ALKALI SYENITE PEGMATITES OF THE VISHNEVYE MOUNTAINS (SOUTH URALS) [PDF]
Минералогия, 2016 Crystallographic orientation of titanite intergrowths with aegirine and eckermannite was found in alkali syenite pegmatites of the Vishnevye Mountains: the titanite face ( 1 11) is parallel to pyroxene and amphibole face (010) and the titanite face (110)
V.A. Popov, I.A. Blinov, V.I. Popova
doaj
X-ray Amorphous Components of Antarctica Dry Valley Soils: Weathering Implications for Mars [PDF]
The Antarctic Dry Valleys (ADV) comprise the largest ice-free region of Antarctica. Precipitation usually occurs as snow, relative humidity is frequently low, and mean annual temperatures are about -20C [1]. Substantial work has focused on soil formation
Graff, T., Ming, D. W., Quinn, J. E.
core +1 more source
Deep Underground Science and Engineering, EarlyView.A scientometric analysis of 2449 journal articles and a comprehensive review of 336 papers were conducted, discussing and identifying challenges and research gaps in rockburst prediction and prevention and proposing an ontology‐based framework for better decision‐making in underground excavations. Abstract With underground engineering projects becoming
Hongchuan Yan +6 more
wiley +1 more source