Results 31 to 40 of about 146,316 (260)

Fractal Analysis of Volcanic Rock Image Based on Difference Box-Counting Dimension and Gray-Level Co-Occurrence Matrix: A Case Study in the Liaohe Basin, China

Fractal and Fractional
Volcanic rocks, as a widely distributed rock type on the earth, are mostly buried deep within basins, and their internal structures possess characteristics by irregularity and self-similarity.
Sijia Li, Zhuwen Wang, Dan Mou
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Evaluation of Support Types of Volcanic Clastic Sand and Gravels Based on Electrical Imaging Logging

Cejing jishu, 2023
The combined effect of river transport and volcanic action during the deposition of volcanic clastic sand conglomerate causes large variations in rock grain size and complex pore structure of different grain size combinations, which affects the reservoir
ZHAO Xiaoqing, WANG Xiangyu, ZHANG Zhiguo, ZHANG Weifeng, CHEN Haifeng   +4 more
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Keeping watch over Colombia’s slumbering volcanoes [PDF]

, 2015
The Volcanological and Seismological Observatories of Manizales, Pasto and Popayan (Colombian Geological Survey) monitor and study the active volcanoes of Colombia using seismological, geodetic, geochemical and other techniques.
BATTAGLIA, MAURIZIO, C. López, D. Arcos, J. Alpala, L. Narváez, Ordoñez, M.   +5 more
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Comparison of geochemical characteristics and forming environment of volcanic rocks in Northern Xinjiang and the Songliao Basin, China

Journal of Natural Gas Geoscience, 2017
The tectonic settings of Northern Xinjiang, Songliao Basin, and its peripheral areas all belong to the Paleoasian orogenic region. Their main structures are all composed of multiple continental segments and peripheral fold belts. Similar tectonic setting
Yanzhao Wei, Xia Zhao, Shan Lu, Zhongying Zhao   +3 more
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Rhyolitic Ash Promoting Organic Matter Enrichment in a Shallow Carbonate Platform: A Case Study of the Maokou Formation in Eastern Sichuan Basin

Frontiers in Earth Science, 2022
Volcanic ash improves the amount of nutritive elements in the lake and ocean, but it is not fully understood how volcanic ash influences the total organic matter content (TOC) and bio-precursor, and the scope.
Qingqiang Meng, Qingqiang Meng, Qingqiang Meng, Qian Pang, Guang Hu, Zhijun Jin, Zhijun Jin, Zhijun Jin, Donhya Zhu, Donhya Zhu, Jiayi Liu, Jiayi Liu, Chuanwen Zhang   +12 more
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Tracking and Characterization of Moving Acoustic Sources Using an Infrasound Array at Volcán Santiaguito, Guatemala [PDF]

, 2015
Active volcanic processes produce large amounts of acoustic energy within the infrasound band (0-20 Hz). Infrasound-sensitive microphones are often installed in addition to other forms of volcano monitoring equipment to increase the ability to remotely ...
Terbush, Brian R.
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Mineral Analysis in Rocks Using XRD and Petrography [PDF]

, 2019
Rock formation in a region is influenced by many factors such as tectonic and volcanic systems of the area. Both activities will affect the microstructure of the rock. This study analyzes mineral composition in three different rocks.
Iqbal, M. (Mochamad), Setiawan, M. R. (Muhamad), Siregar, R. N. (Rahmat)   +2 more
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Water-source contributions to barrier lakes and water-rock interactions in the Wudalianchi volcanic area, Northeast China [PDF]

, 2021
Junyu Zou, Zefeng Song, Yamin Duan
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Hyperspectral mapping of density, porosity, stiffness, and strength in hydrothermally altered volcanic rocks [PDF]

Solid Earth
Heterogeneous structures and diverse volcanic, hydrothermal, and geomorphological processes hinder characterisation of the mechanical properties of volcanic rock masses.
S. T. Thiele, G. Kereszturi, M. J. Heap, M. J. Heap, A. de Lima Ribeiro, A. V. Kamath, M. Kidd, M. Tramontini, M. Rosas-Carbajal, R. Gloaguen   +9 more
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Testing the ureilite projectile hypothesis for the El'gygytgyn impact: determination of siderophile element abundances and Os isotope ratios in ICDP drill core samples and melt rocks [PDF]

, 2013
The geochemical nature of the impactites from International Continental Scientific Drilling Project-El'gygytgyn lake drill core 1C is compared with that of impact melt rock fragments collected near the western rim of the structure and literature data ...
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