Results 31 to 40 of about 1,977 (227)

Geomorphology and Mineralogy of Belén Crater in Iani Chaos (Mars) Point to Hydrothermal Activity

The Planetary Science Journal
The study of Martian chaotic terrains helps constrain the ancient geologic history of the Martian water cycle, as these regions preserve geomorphic and mineralogical evidence of catastrophic groundwater release, subsurface ice melting, and associated ...
M. C. Rojas, M. Mantegazza, J. L. Bishop, M. G. Spagnuolo   +3 more
doaj   +1 more source

Exploring Carbon Mineral Systems: Recent Advances in C Mineral Evolution, Mineral Ecology, and Network Analysis

Frontiers in Earth Science, 2020
Large and growing data resources on the spatial and temporal diversity and distribution of the more than 400 carbon-bearing mineral species reveal patterns of mineral evolution and ecology.
Shaunna M. Morrison, Joy Buongiorno, Robert T. Downs, Ahmed Eleish, Peter Fox, Donato Giovannelli, Donato Giovannelli, Donato Giovannelli, Donato Giovannelli, Joshua J. Golden, Daniel R. Hummer, Grethe Hystad, Louise H. Kellogg, Oliver Kreylos, Sergey V. Krivovichev, Chao Liu, Andrew Merdith, Anirudh Prabhu, Jolyon Ralph, Simone E. Runyon, Sabin Zahirovic, Robert M. Hazen   +21 more
doaj   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

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, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Potential Subsurface Lava Tube Skylight on the Western Flank of Elysium Mons, Mars

The Astronomical Journal
The western flank of Elysium Mons, Mars, hosts a potential cave candidate (PCC) associated with a partially collapsed pit chain, previously identified in the Mars Cave Catalog.
Ravi Sharma, Chunyu Ding, Yan Su, Zhonghan Lei, Changzhi Jiang, Jiangwan Xu, YuXiao Zhi, Zihang Liang, Jiawei Li, Xiaohang Qiu, Haoyu Chen, S. N. A. Jaaffrey, (AAS Journals Data Editors)   +12 more
doaj   +1 more source

Seismic analysis and design of tunnels within fault ground: A review

Deep Underground Science and Engineering, EarlyView.
The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang, Yujing Jiang, Xuepeng Zhang, Yuyong Jiao, Ningbo Li, Xiao Wang, Bo Li   +6 more
wiley   +1 more source

Upper bound limit analysis of coral reef limestone cavern roof stability incorporating a tension‐shear failure mechanism with tensile‐strength cut‐off

Deep Underground Science and Engineering, EarlyView.
For the roof of coral reef limestone caverns, a novel tension‐shear composite failure mechanism was developed. The most critical tensile crack model was identified using a hybrid optimization algorithm, and the stability of the cavern roof was analyzed accordingly.
Dongsheng Xu, Chenxu Li, Chuantan Hou
wiley   +1 more source

From stellar to planetary composition: Galactic chemical evolution of Mg/Si mineralogical ratio [PDF]

Astronomy & Astrophysics, 2015
The main goal of this work is to study element ratios that are important for the formation of planets of different masses. We study potential correlations between the existence of planetary companions and the relative elemental abundances of their host stars. We use a large sample of FGK-type dwarf stars for which precise Mg, Si, and Fe abundances have
Adibekyan V., Santos N. C., Figueira P., Dorn C., Sousa S. G., Delgado-Mena E., Israelian G., Habokyan A. A., Mordasini C.   +8 more
openaire   +2 more sources

Analysing the Drivers of Cropland Footprint in Leading Agricultural Nations: Evidence From MMQR Approach

Geological Journal, EarlyView.
ABSTRACT Climate change represents the biggest current challenge for us and for future generations. Its impact on agriculture is undeniable, considering the food security goal. Thus, the cropland footprint has been distinguished as a comprehensive index for assessing the impact of environmental changes in agricultural areas determined by the increased ...
Ibrahim Cutcu, Magdalena Radulescu
wiley   +1 more source

Ultra-compact imaging spectrometer for remote,in situ, and microscopic planetary mineralogy [PDF]

Journal of Applied Remote Sensing, 2014
The ultra-compact imaging spectrometer is a miniature imaging spectrometer that has been designed for compatibility with operation in a Martian environment. The spectrometer can be mated to a variety of front optics, both telescopic and microscopic. With a miniature telescope, it can serve as a rover mast instrument that surveys the surrounding area
Van Gorp, Byron, Mouroulis, Pantazis, Blaney, Diana, Green, Robert O., Ehlmann, Bethany L., Rodriguez, Jose I.   +5 more
openaire   +2 more sources

Mesozoic–Cenozoic Thermochronology of the Tarim–Southern Tianshan System, NW China

Geological Journal, EarlyView.
Tectonothermal history of the Tarim–Southern Tianshan system compared with the major tectonic events at far‐field plate margins. ABSTRACT The Tarim Basin, an oil‐bearing basin in northwest China, is tectonically and sedimentologically linked to the Southern Tianshan Orogenic Belt.
Shuangfeng Zhao, Wen Chen, Jingbo Sun, Ze Shen, Jie Zhang   +4 more
wiley   +1 more source