Results 61 to 70 of about 23,662 (266)
Giant Porphyry Copper Deposits Caused by a Slab Jamming in the Mantle Transition Zone
Terra Nova, EarlyView.ABSTRACT Two giant porphyry copper deposits in the Southern Central Andes formed during the Miocene–Pliocene transition when a bend in the subducting Juan de Fernández hotspot chain jammed in the mantle transition zone, causing mega‐scale slab‐kinking. This geometry implies mechanical resistance that caused East–West compression and eventually a thrust‐
Nipaporn Nakrong +5 more
wiley +1 more source
Boulder of orbicular rapakivi in Taivassalo, southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 1983 A boulder of an orbicular rapakivi was found in Taivassalo, close to the southern contact of the Vehmaa rapakivi area in southwestern Finland. Many features, e.g.
N. Edelman
doaj +1 more source
Geofluids, 2019 Deep-seated geothermal reservoirs beneath calderas have high potential as sources of renewable energy. In this study, we used an analysis of melt inclusions to estimate the amount of water input to the upper crust and quantify the properties of a deep ...
Fajar F. Amanda +4 more
doaj +1 more source
Journal of Marine Science and Engineering, 2023 Submarine volcanic eruptions can be destructive for marine environments and resources. Magma mixing is considered to be an important trigger for volcanic eruptions.
Yuxiang Zhang, Zuxing Chen, Zhigang Zeng
doaj +1 more source
Feeding of a magma chamber by an ascending magma bubble
Geophysical Journal International, 2021 SUMMARY There is evidence that magma chambers are not fed by a continuous flow, but in the form of discrete magma batches. The possibility is considered that the chamber is fed by a magma bubble ascending through the region underneath, driven by buoyancy force.
openaire +1 more source
The large-scale surface uplift in the Altiplano-Puna region of Bolivia: A parametric study of source characteristics and crustal rheology using finite element analysis [PDF]
, 2013 This paper focuses on the driving mechanism behind a 70 km wide region of ground uplift centered on Uturuncu volcano, in the Altiplano-Puna region of southern Bolivia.
del Potro, Rodrigo +2 more
core +2 more sources
Deep magmatic processes of mafic layered intrusions in the Lala mining area, western Sichuan
Dizhi lixue xuebaoObjective Previous studies have shown that many layered intrusions are formed by multiple pulsations of magma. However, little research has been done on whether the magma involved in the pulsation process comes from a single magma chamber or multiple ...
SUN Junyi, LUO Zhaohua, CUI Jiawei
doaj +1 more source
Volcano-tectonic interactions as triggers of volcanic eruptions [PDF]
, 2013 Surface displacements and edifice deformations at active volcanoes can occur when magma reservoirs begin to inflate as new magma enters them. Volcanoes are also subjected to a variety of external lithospheric stresses that are thought to be responsible ...
Gabrieli, Andrea +2 more
core +1 more source
Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.Abstract Compressional and shear wave velocities (Vp, Vs) of candidate Martian deep‐mantle minerals, FeO‐rich ringwoodite ((Mg0.66Fe0.34)2SiO4) and majorite (Mg0.75Fe0.10Al0.26Ca0.07Si0.84O3), were measured up to 25 GPa and 700 K using Brillouin light scattering coupled with externally‐heated diamond anvil cells.
Luo Li +6 more
wiley +1 more source
Earth, Planets and Space, 2018 Petrological observations and chemical analyses of melt inclusions in scoria were used to investigate the magma ascent and eruption processes of the 1979, 1989, and 2014 eruptions of Nakadake, Aso volcano, Japan. Major elements and sulfur contents of the
Genji Saito +4 more
doaj +1 more source