Results 61 to 70 of about 579,075 (212)

Deep magmatic processes of mafic layered intrusions in the Lala mining area, western Sichuan

Dizhi lixue xuebao
Objective  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

Plagioclase as evidence of magmatic evolution in the Zafarqand porphyry copper deposit, NE Isfahan

Journal of Economic Geology, 2018
Introduction Chemical and textural zoning patterns preserved in plagioclase phenocrysts can provide useful information on parameters that constrains the changing melt compositions in the magma systems.
Maryam Aminoroayaei Yamini , Faramarz Tutti, Mohammad Reza Aminoroayaei Yamini, Jamshid Ahmadian   +3 more
doaj   +1 more source

Petrological characteristics and volatile content of magma of the 1979, 1989, and 2014 eruptions of Nakadake, Aso volcano, Japan

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, Osamu Ishizuka, Yoshihiro Ishizuka, Hideo Hoshizumi, Isoji Miyagi   +4 more
doaj   +1 more source

A New High‐Resolution Broadband Lg Attenuation Model Beneath Colombia: Implications for Triple Junction Tectonics

Geophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract The existence of a typical triple junction in Colombia is crucial for understanding plate convergence and coupling among the South American Plate, the subducting Nazca Plate, and the Caribbean Plate. However, locating this triple junction is challenging due to complex geodynamic evolution and uncertainty in the slab boundaries.
Zhen Liu, Lian‐Feng Zhao, Xiao‐Bi Xie, Carlos A. Vargas, Bao‐Feng Tian, Zhen‐Xing Yao   +5 more
wiley   +1 more source

Shallow Magmatic System of Arxan Volcano Revealed by Ambient Noise Tomography with Dense Array

Applied Sciences
The Arxan Volcanic Field (AVF) is an active volcanic region in Northeast Asia, and its last eruption occurred approximately 2000 years ago. Its eruption mechanism remains unknown.
Lijuan Qu, You Tian, Cai Liu, Hongli Li
doaj   +1 more source

Numerical Modeling Of Pressure Source Of Sinabung Volcano Based On GPS Data In 2011-2012 Using Particle Swarm Optimization (PS0)

Computational and Experimental Research in Materials and Renewable Energy, 2020
Mogi Model with particle swarm optimization (PSO) scheme have been applied to the local GPS data of Sinabung Volcano during 2011 to 2012 to receive subsurface parameters as pressure sources in terms of misfit and inversion model parameter.
Ratih Kumalasari, Wahyu Srigutomo, Irwan Meilano, Hendra Gunawan   +3 more
doaj   +1 more source

Rapakivi K‐Feldspar Megacrysts in Monzogranitic Porphyry: Evidence for Magma Recharge and Mush Rejuvenation

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract The formation, storage, and evolution of granitic magmas are fundamental processes driving the growth of continental crust. While traditionally attributed to crystal fractionation in high‐melt fraction magma chambers, the model invoking low‐melt fraction crystal mushes has gained wide acceptance.
Wang Li, Xuxuan Ma, Roberto Weinberg, Liang Qiu, Zhiyong Zhu, Haibing Li   +5 more
wiley   +1 more source

Correlation between magma chamber deflation and eruption cloud height during the 2011 Shinmoe-dake eruptions

Earth, Planets and Space, 2014
Multiple observations of subsurface and surface phenomena during volcanic eruptions provide important information about eruption styles, eruption column dynamics, and magma plumbing systems.
T. Kozono, H. Ueda, T. Shimbori, K. Fukui   +3 more
semanticscholar   +1 more source

Nakhlite Emplacement as Constrained by X‐Ray Computed Tomography and 3D Quantitative Textural and Petrofabric Analyses

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract Nakhlites, clinopyroxene‐rich rocks, are the largest single‐origin suite of samples from Mars. Despite extensive study to discern their petrogenetic histories, nakhlite emplacement mechanisms and environments are not well‐constrained, and it is unknown whether they represent intrusive or extrusive igneous rocks, or a combination.
Sierra R. Ramsey, Piper Irvin, Arya Udry, Scott A. Eckley, Amanda Ostwald, Richard A. Ketcham   +5 more
wiley   +1 more source

EDS Analysis for Petrology: A Probabilistic Framework With GPyEDS

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 4, December 2025.
Abstract Microtextural and chemical data from minerals in igneous rocks are critical for unpacking and developing understanding of processes in magmatic systems. Recent advancements leveraging unsupervised machine learning methods offer novel approaches for phase classification without requiring prior knowledge of phases or chemistry.
Norbert Toth, Sarah Shi, John Maclennan, Po‐Yen Tung   +3 more
wiley   +1 more source