Results 101 to 110 of about 64,749 (299)
Deep Underground Science and Engineering, EarlyView.Abstract As tunnel construction advances in lengths and depths, the construction of tunnels in high geothermal environments has become increasingly common, raising significant fire risks. In this study, a 1:20 scale model tunnel test platform was constructed to investigate the effects of a high geothermal environment on fire behavior in tunnels during ...
Xiaoxian Fei +6 more
wiley +1 more source
, 2019 Reviews in Mineralogy & Geochemistry (RiMG) volumes contain concise advances in theoretical and/or applied mineralogy, crystallography, petrology, and geochemistry.Intro; Copyright; List of additional volumes of Reviews in Mineralogy; Foreword; Preface ...
Gibbs Gerald V. +2 more
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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
Carbonatite shows on the quartz deposits “Vein 175” (Ufalei block, the Southern Urals)
Литосфера, 2017 The subject of the study are manifestations of carbonatites in the quartz deposit “Vein № 175” - the largest deposit of granular quartz of Ufalei block in the Southern Urals.
Larisa Y. Kabanova +3 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.This study highlights that with the static and time‐dependent evolution of slip versus dilation tendency parameter space, structurally controlled deep geothermal systems can be selected within areas of higher permeability and lower seismic hazard. Abstract Faults play a vital role in the Earth's hydraulic system by facilitating fluid flow when dilating
Michal Kruszewski +4 more
wiley +1 more source
Feldspar mineralogy Reviews in mineralogy ;, v. 2./ Paul H. Ribbe, editor.
, 2019 In English.Includes bibliographical references.Volume 2 of Reviews in Mineralogy displays the Short Course on Feldspar Mineralogy in Salt Lake City in October 1975.
Ribbe Paul H.,
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The mineralogy, geochemistry, and petrogenesis of the grønnedal-íka alkaline igneous complex, south-west Greenland [PDF]
, 1989 At 1299±17 Ma (Blaxland et al, 1978), the Grønnedal-Íka is the oldest of the Gardar centres, situated in the extreme north-west of the province. Hare-earth clement (REE) trends suggest that the nepheline-syenites which make up the bulk of the complex ...
Bedford, Christopher M.
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KOM′YA-KURAY GOLD PLACER OF THE ATLYAN GROUP, MIASS RIVER VALLEY, AND PROSPECTS FOR FURTHER EXPLORATION OF GOLD PLACERS OF THE SOUTH URALS [PDF]
Минералогия, 2016 Fifty six minerals were identified in 231 heave concentrates from 30 boreholes of the Kom′yaKuray gold placer of the Atlyan placer group, which have been mined since 1930 to 1960 and additionally explored in 1980s–1990s.
V.I. Popova +3 more
doaj
Deep Underground Science and Engineering, EarlyView.This study investigates ground subsidence during tunnel excavation in karst areas, highlighting the combined effects of karst cave proximity, cave size, and soil spatial variability. Findings suggest that shorter cave distances and larger cave sizes increase subsidence variability, and a modified Peck formula is proposed for more accurate subsidence ...
Zhenghong Su +4 more
wiley +1 more source
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
wiley +1 more source