Results 11 to 20 of about 868,396 (250)

Distict element numerical modelling of volcanic debris avalanche emplacement geomechanics. [PDF]

Catastrophic collapse of volcanic edifices is a relatively common phenomenon in the geological record, representing the largest subaeriallandsliding events on Earth.
Thompson, Nicholas Darrell
core   +9 more sources

Chemical classification of common volcanic rocks based on degree of silica saturation and CaO/K2O ratio

Anais da Academia Brasileira de Ciências, 2021
Modal classifications of common volcanic rocks are expensive, difficult, or impossible to attain. As a consequence, these rocks are classified using the chemical composition.
JOÃO O.S. SANTOS, LÉO A. HARTMANN
doaj   +1 more source

Application of X-ray Fluorescence Spectrometry and Electron Microprobe in the Identification of Intermediate-Felsic Volcanic Rocks

Yankuang ceshi, 2016
Intermediate-felsic volcanic rock has porphyritic texture and the matrix is characterized by microlitic, cryptocrystalline and vitreous textures. There will be errors when identifying and classifying the rocks using only a polarizing microscope because ...
XU Cui, LI Lin-qing, ZHANG Jie, HE Li, ZHANG Gui-feng, WANG Yan-long   +5 more
doaj   +1 more source

Relation of lineaments and volcano-stratigraphy of tertiary volcanic rocks in Kulon Progo Mountains Area, Yogyakarta-Indonesia

E3S Web of Conferences, 2019
The structural lineaments developed in the Kulon Progo Mountains, which is mainly composed of Tertiary volcanic rocks. The direction and distribution of these lineaments density differs from one area to another.
Widagdo Asmoro, Pramumjoyo Subagyo, Harijoko Agung   +2 more
doaj   +1 more source

Effect of nanoparticle of volcanic ash and rock phosphate on some soil chemical properties of variable charge Andisols, Indonesia

Soil & Environment, 2018
Andisols is a variable charge soil where fertilizations to the soil do not give the same result as that to the soils with permanent charges. Therefore, amelioration is needed to improve the soil chemical properties.
Mahfud Arifin, Rina Devnita, Ade Setiawan, Apong Sandrawati, Nenny Nurlaeny , Anne Yuliana   +5 more
doaj   +1 more source

ANALISIS BAHAYA, LINTASAN, DAN SISTEM PROTEKSI TERHADAP POTENSI LONGSORAN TIPE JATUHAN BATU PADA LERENG BANGUNAN PELIMPAH BENDUNGAN TUGU, JAWA TIMUR

Jurnal Teknik Hidraulik, 2021
The construction of the Tugu Dam spillway does not escape the problem of slope instability, especially the rock fall type landslide as a result of the rock slope cutting work at STA+80.
Muhammad Iqbal Hamidi, Imam Achmad Sadisun   +1 more
doaj   +1 more source

Performance of the X-ray powder diffraction (XRD), X-ray fluorescence (XRF) and the industrial computed tomography used for characterization of the vesicular volcanic rock.

Brazilian Journal of Radiation Sciences, 2021
Volcanic rock is a designation in geology given to extrusive igneous rocks. One type of igneous rock of interest, in economic terms, is vesicular, since, besides the knowledge of the morphology (positioning, size, direction, and interconnectivity of the ...
Rodrigo Silva Santos, Francisco Assis Cavallaro, Thiago Lynyker da Silva Bernardes, Rafael Aquino Amadeu, Rafael H. L. Garcia, Alexandre França Velo, Carlos Henrique Mesquita, Margarida Mizue Hamada   +7 more
doaj   +1 more source

Method of identifying and characterizing of volcanic traps and its application

Shiyou shiyan dizhi, 2021
Volcanic rocks were widely developed in sedimentary basins in China. The Songliao, Junggar and Sichuan basins have got great research successes and exploration discoveries in igneous reservoirs, which have become one of the important fields for oil and ...
Shuang YANG, Zhongbo LI, Xiangbin YAN, Lixue CAI   +3 more
doaj   +1 more source

The analysis of volcanic activity influences at the lower and middle part of Sentolo Formation, Kulon Progo using petrographic method

MATEC Web of Conferences, 2018
The research area is a part of South Serayu Mountain zone, specifically Bregada Kulon Progo. The Bregada Kulon Progo is a product of volcanic activity in the past, which can be seen by the volcanic rock called Old Andesite Formation.
Winarno Tri, Marin Jenian, Hani Pratama Ilham, Kurniasih Anis   +3 more
doaj   +1 more source

Reservoir characteristics in the Cretaceous volcanic rocks of Songliao Basin, China: A case of dynamics and evolution of the volcano-porosity and diagenesis

Energy Exploration & Exploitation, 2019
To explain the strong spatial heterogeneity of volcanic reservoirs porosity in the Songliao Basin and provide new ideas for predicting good volcanic reservoirs in other similar basins, the relationship between the pore evolution process and lithology of ...
Haitao Sun, Dakang Zhong, Weijia Zhan
doaj   +1 more source