Results 21 to 30 of about 21,971 (257)

Sources of the terrigenous and volcanic ash material in the Middle Volgian deposits of the Eastern Russian Platform

Учёные записки Казанского университета: Серия Естественные науки, 2021
The current research aims to reconstruct sources of the rocks and pyroclastic input in the epeiric sea of the Eastern Russian Platform in the Latest Jurassic.
K.I. Nikashin, S.O. Zorina
doaj   +1 more source

Physical properties of pyroclastic density currents: relevance, challenges and future directions

Frontiers in Earth Science, 2023
Pyroclastic density currents (PDCs) are hazardous and destructive phenomena that pose a significant threat to communities living in the proximity of active volcanoes.
Thomas J. Jones, Frances Beckett, Benjamin Bernard, Eric C. P. Breard, Eric C. P. Breard, Fabio Dioguardi, Fabio Dioguardi, Josef Dufek, Samantha Engwell, Julia Eychenne, Julia Eychenne   +10 more
doaj   +1 more source

The fragmentation threshold of pyroclastic rocks [PDF]

Earth and Planetary Science Letters, 2004
In response to rapid decompression, porous magma may fragment explosively. This occurs when the melt can no longer withstand forces exerted upon it due to the overpressure in included bubbles. This occurs at a critical pressure difference between the bubbles and the surrounding magma. In this study we have investigated this pressure threshold necessary
Oliver Spieler, Ben Kennedy, Ulrich Kueppers, Donald B. Dingwell, Bettina Scheu, Jacopo Taddeucci   +5 more
openaire   +1 more source

Magnetic characteristics of the Ság-hegy volcanic complex, little Hungarian Plain [PDF]

, 2006
The Ság-hegy volcanic complex is located in the little Hungarian Plain Volcanic Field (LHPVF). An 39Ar/ 40Ar geochronolgy gave an isochron age of 5,42 ±0,06 My for the Ság- hegy (Wijbrans et al. 2004).
Auer, Andreas, de Wall, Helga, Dvorazik, Nina, Martin, Ulrike, Nemeth, Karoly, Rolf, Christoph   +5 more
core   +6 more sources

Evolution Magmatism of Nagasari Volcano Dieng, Central Java, Indonesia

JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2022
Nagasari Volcano, part of the Dieng volcanic complex, is one of the unique volcanoes in Central Java. Around this volcano grow eruption craters, volcanic cones, and pyroclastic flow ridges. There were several 14 eruption centers around Mount Nagasari, so
Dwi Fitri Yudiantoro, Intan Paramita Haty, Setia Pambudi, Elisabet Magdalena, Armala Putri, I. Takashima, M. Abdurrachman   +6 more
doaj   +1 more source

Cenozoic volcanic rocks in the Pearl River Mouth and Southeast Hainan Basins of South China Sea and their implications for petroleum geology

Petroleum Exploration and Development, 2013
Drilling, gravity, magnetic observation and seismic facies are combined to identify the Cenozoic volcanic rocks in the Pearl River Mouth Basin and the Southeast Hainan Basin in the northern South China Sea, and to analyze how their lithology ...
Bin ZHANG, Pujun WANG, Gongcheng ZHANG, Xiaomeng SUN, Baoliang LU, Weiyi NI   +5 more
doaj   +1 more source

Distribution and gas-bearing properties of Permian igneous rocks in Sichuan Basin, SW China

Petroleum Exploration and Development, 2019
Based on the analysis of outcrop, seismic, logging and drilling data, combined with exploration practice, the characteristics, distribution, reservoir performance and gas-bearing properties of Permian igneous rocks in Sichuan Basin are studied. The study
Xinhua MA, Guohui LI, Danlin YING, Benjian ZHAGN, Ya LI, Xin DAI, Yi FAN, Yunxian ZENG   +7 more
doaj   +1 more source

Composition of spherules and lower mantle minerals, isotopic and geochemical characteristics of zircon from volcaniclastic facies of the Mriya lamproite pipe

Записки Горного института, 2020
The article presents the results of studying the rocks of the pyroclastic facies of the Mriya lamproite pipe, located on the Priazovsky block of the Ukrainian shield.
Ivan G. YATSENKO, Sergey G. SKUBLOV, Ekaterina V. LEVASHOVA, Olga L. GALANKINA, Sergey N. BEKESHA   +4 more
doaj   +1 more source

The Arequita Formation (Lower Cretaceous): Petrographic features of the volcanic facies In the Laguna Merín Basin, east Uruguay

Latin American Journal of Sedimentology and Basin Analysis, 2021
The southeastern border of the Laguna Merín Basin (Rocha Department, East Uruguay) consists of Mesozoic volcanic deposits of the Puerto Gómez and Arequita formations, overlain by a sedimentary cover of Cenozoic and recent deposits.
Rossana Muzio Sauer, Ethel Morales, Gerardo Veroslavsky, Bruno Conti   +3 more
doaj   +2 more sources

The Kummitsoiva komatiite complex and its satellites in northern Finland [PDF]

Bulletin of the Geological Society of Finland, 1983
The Kummitsoiva komatiite complex and its satellites, regarded either as Archean or Proterozoic in age, consist principally of amphibole- chlorite rocks corresponding chemically to basaltic komatiite of the Geluk type in South Africa.
M. Saverikko
doaj   +1 more source