Results 61 to 70 of about 392,695 (199)

Unveiling Tatun volcanic plumbing structure induced by post-collisional extension of Taiwan mountain belt

Scientific Reports, 2021
The Tatun Volcanic Group (TVG) is proximal to the metropolis of Taipei City (population of ca. 7 million) and has long been a major concern due to the potential risks from volcanic activity to the population and critical infrastructure. While the TVG has
Hsin-Hua Huang, E.-S. Wu, C.-H. Lin, J. Y.-T. Ko, M.-H. Shih, I. Koulakov   +5 more
doaj   +1 more source

Seismolosical studies of magma injection processes: volcano monitoring and imaging of magma chambers [PDF]

, 2001
The processes associated with magma injection at shallow depths within the crust have been the topic of many geophysical studies, some investigating the seismicity that accompanies volcanic activity and others attempting to map the subsurface extent and ...
Konstantinou, K.I., Konstantinou, Konstantinos I.   +1 more
core  

Evolution of a silicic magma reservoir in the upper crust : Reyðarártindur pluton, Southeast Iceland

, 2022
Field observations of extinct and exposed magma reservoirs shed light on processes operating in the roots of presently active volcanoes. The Reyðarártindur pluton, Southeast Iceland is an example of a fossil shallow magma reservoir that fed eruptions ...
Rhodes, Emma
core   +2 more sources

Role of Magma Ocean Differentiation in the Formation and Long‐Term Preservation of Distinct Geochemical Domains Within the Deep Mantle

Geochemistry, Geophysics, Geosystems
We modeled the evolution of the terrestrial Magma Ocean using the short‐lived 182Hf‐182W isotope system (t1/2 = 8.9 Myr) in a multi‐reservoir early Earth. We start with a chondritic Earth at T0 = 4.567 Ga. Core segregates and attains its present‐day mass,
Seema Kumari, Ramananda Chakrabarti
doaj   +1 more source

Extensive, water-rich magma reservoir beneath southern Montserrat [PDF]

Lithos, 2016
South Soufrière Hills and Soufrière Hills volcanoes are 2 km apart at the southern end of the island of Montserrat, West Indies. Their magmas are distinct geochemically, despite these volcanoes having been active contemporaneously at 131–129 ka. We use the water content of pyroxenes and melt inclusion data to reconstruct the bulk water contents of ...
Edmonds, M., Kohn, S.C., Hauri, E.H., Humphreys, M.C.S., Cassidy, M.   +4 more
openaire   +2 more sources

Reservoir characteristics and hydrocarbon accumulation significance of metamorphic zones of intrusive rocks and surrounding rocks in second member of Paleocene Funing Formation in Qintong Sag, Subei Basin

Shiyou shiyan dizhi
Volcanic reservoirs play a crucial role in oil and gas exploration. The intrusive rocks in the Qintong Sag of the Subei Basin are widely distributed within active oil and gas deposits, making them a significant area for further exploration and reserve ...
Suhua ZANG
doaj   +1 more source

Zircon and Melt Extraction From a Long‐Lived and Vertically Extensive Magma System Underneath Ilopango Caldera (El Salvador)

Geochemistry, Geophysics, Geosystems, 2021
The Tierra Blanca (TB) eruptive suite comprises the last four major eruptions of Ilopango caldera in El Salvador (≤45 ka), including the youngest Tierra Blanca Joven eruption (TBJ; ∼106 km3): the most voluminous event during the Holocene in Central ...
A. Cisneros de León, A. K. Schmitt, S. Kutterolf, J. C. Schindlbeck‐Belo, W. Hernández, K. W. W. Sims, J. Garrison, L. B. Kant, B. Weber, K.‐L. Wang, H.‐Y. Lee, R. B. Trumbull   +11 more
doaj   +1 more source

Melt re-injection into large magma reservoir after giant caldera eruption at Kikai Caldera Volcano

Communications Earth & Environment
Melt re-injection after a giant caldera eruption was quantitatively investigated for the Kikai Caldera Volcano in Japan, which erupted 7300 years ago (Kikai-Akahoya eruption). Our seismic refraction survey revealed a low-velocity anomaly directly beneath
Akihiro Nagaya, Nobukazu Seama, Gou Fujie, Satoru Tanaka, Hiroko Sugioka, Shuichi Kodaira   +5 more
doaj   +1 more source

Venus: A Thick Basal Magma Ocean May Exist Today

Geophysical Research Letters, 2020
Basal magma oceans develop in Earth and Venus after accretion as their mantles solidify from the middle outward. Fractional crystallization of the basal mantle is buffered by the core and radiogenic and latent heat in the magma ocean.
J. G. O'Rourke
doaj   +1 more source

Probing Magma Reservoirs to Improve Volcano Forecasts

Eos, 2017
The roots of volcanoes remain enigmatic, largely because geophysical and petrological models remain rudimentary. Scientific drilling and exploration can help.
Jacob Lowenstern, Thomas Sisson, Shaul Hurwitz   +2 more
openaire   +1 more source