Results 1 to 10 of about 1,079,785 (200)

Remediation of Annular Gas Migration along Cemented Wellbores Using Reactive Mineral Fluids: Experimental Assessment of Sodium Bicarbonate and Sodium Silicate-Based Solutions

Energies, 2021
Achieving zonal isolation along wellbores is essential for upholding the containment integrity of subsurface reservoirs and preventing fluid seepage to the environment.
Timotheus K. T. Wolterbeek, Suzanne J. T. Hangx   +1 more
doaj   +1 more source

The stability of subducted glaucophane with the Earth’s secular cooling

Nature Communications, 2021
Along the cold subduction geotherm, glaucophane remains stable down to pressure and temperature (P–T) conditions of ca. 240 km depth, whereas under the warm subduction geotherm, it dehydrates and breaks down into pyroxenes and silica between ca.
Yoonah Bang, Huijeong Hwang, Taehyun Kim, Hyunchae Cynn, Yong Park, Haemyeong Jung, Changyong Park, Dmitry Popov, Vitali B. Prakapenka, Lin Wang, Hanns-Peter Liermann, Tetsuo Irifune, Ho-Kwang Mao, Yongjae Lee   +13 more
doaj   +1 more source

Superionic effect and anisotropic texture in Earth’s inner core driven by geomagnetic field

Nature Communications, 2023
Earth’s inner core is heterogeneous and anisotropic. A new study based on computational simulation reveals the presence of ionic hydrogen flux in iron crystals, driven by the dipole geomagnetic field, which promotes the formation of observed inner core ...
Shichuan Sun, Yu He, Junyi Yang, Yufeng Lin, Jinfeng Li, Duck Young Kim, Heping Li, Ho-kwang Mao   +7 more
doaj   +1 more source

Phase transition mechanism and bandgap engineering of Sb2S3 at gigapascal pressures

Communications Chemistry, 2021
Antimonite (Sb2S3) has potential applications for solar energy, but how its layered structure changes under pressure is incompletely understood. Here diamond anvil cell experiments supported by first principles calculations offer a structural explanation
Zhongxun Cui, Kejun Bu, Yukai Zhuang, Mary-Ellen Donnelly, Dongzhou Zhang, Philip Dalladay-Simpson, Ross T. Howie, Jiandong Zhang, Xujie Lü, Qingyang Hu   +9 more
doaj   +1 more source

The Structure and Elasticity of CaO3 Under High Pressure by First-Principles Simulation

Frontiers in Earth Science, 2022
The structure, electrical properties, elasticity, and anisotropy of the newly discovered mantle mineral, CaO3, are obtained under 10–50 GPa by first-principles simulation to understand their relations with the composition and structure of the mantle ...
Hanyu Wang, Lei Liu, Longxing Yang, Longxing Yang, Fengxia Sun, Fengxia Sun, Li Yi, Hong Liu   +7 more
doaj   +1 more source

Rock mass classification in highway tunnel engineering during exploration phase and case study [PDF]

Archives of Civil Engineering, 2023
It is the foundation of tunnel engineering to classify the rock mass surrounding tunnels. However, it is not easy to precisely determine the class of rock mass in practice as sufficient geological exploration need to be completed before rock mass ...
Du Yanqiang, Xie Bing
doaj   +1 more source

Formation of an Al‐Rich Niccolite‐Type Silica in Subducted Oceanic Crust: Implications for Water Transport to the Deep Lower Mantle

Geophysical Research Letters, 2022
Subducted oceanic crust is enriched in free silica. Although being one of the silica polymorphs at lower‐mantle pressures, niccolite‐type phase (Nt‐phase) has not been documented in multicomponent metabasaltic or metasediment compositions relevant to ...
Lu Liu, Hongsheng Yuan, Yao Yao, Ziqiang Yang, Federico Aiace Gorelli, Nico Giordano, Lixin He, Eiji Ohtani, Li Zhang   +8 more
doaj   +1 more source

Field Study on Earth Pressure of Finite Soil Considering Soil Displacement

Applied Sciences, 2022
The classical earth pressure theory assumes a semi-infinite soil behind the wall, which is no longer applicable to the problem of earth pressure in the case of finite soil.
Haibo Hu, Feng Yang, Haibin Tang, Yujie Zeng, Jiajin Zhou, Xiaonan Gong   +5 more
doaj   +1 more source

Effect of haunch on the stresses of box culvert

AIMS Environmental Science, 2020
Culverts are often required under earth embankment to allow for the crossing of a watercourse, like streams, to prevent the road embankment from obstructing the natural waterway.
Osama S. Hussien
doaj   +1 more source

Phase transitions in MgSiO3 post-perovskite in super-Earth mantles [PDF]

, 2017
The highest pressure form of the major Earth-forming mantle silicate is MgSiO3 post-perovskite (PPv). Understanding the fate of PPv at TPa pressures is the first step for understanding the mineralogy of super-Earths-type exoplanets, arguably the most ...
Adibekyan, Baroni, Bond, Borucki, Cai-Zhuang Wang, Christensen, Coppari, da Silva, Delfosse, Dorn, Dorn, Fortney, Gautier, Giannozzi, Gillon, Grasset, Guillot, Hatzes, Irifune, Jackson, Ji, Kai-Ming Ho, Karki, Karki, Koichiro Umemoto, Leger, Marumo, Mayor, McDonough, Mehl, Min Ji, Murakami, Murakami, Niu, Oganov, Peltier, Perdew, Quintana, Renata M. Wentzcovitch, Santos, Sasselov, Seager, Shahnas, Shunqing Wu, Sotin, Tackley, Torres, Tosi, Tsuchiya, Tsuchiya, Umemoto, Umemoto, Umemoto, Umemoto, Unterborn, Unterborn, Valencia, Vanderbilt, Wagner, Wallace, Wang, Weinstein, Weiss, Wentzcovitch, Wentzcovitch, Wright, Wu, Wu   +67 more
core   +4 more sources