Scholpp, Jesse L. Ryan, Jeffrey G. Shervais, John W. Stremtan, Ciprian Rittner, Martin Luna, Antonio Hill, Stephen A. Atlas, Zachary D. Mack, Bradford C.
Published in
American Mineralogist
Boninite samples from several intervals within Hole U1439C, recovered during IODP Expedition 352, show highly variable mineral chemistries that imply complex crystallization histories. Small pyroxene grains show oscillatory zoning with cores and zones ranging from pigeonite to augite. Late crystallizing augite has highly variable Al2O3 contents (1....
Chavide, Maria Tabatabaei Manesh, Seyed Mohsen Ahmadian, Jamshid
Published in
Petrology
AbstractThe Urumieh-Dokhtar Magmatic Arc (UDMA) appears as a nearly linear suite of magmatic rocks that extends from NW to SE Iran parallel with the orogenic suture of the Zagros Fold-Thrust belt. The Qazan granitoids formed along the central part of UDMA and span a wide range of felsic rocks, including granodiorite, quartz diorite, diorite, and mo...
Ma, Xuxuan Zhao, Zhongbao Cao, Wenrong Huang, He Xiong, Fahui Cawood, Tarryn Li, Haibing
Published in
Frontiers in Earth Science
The Quxu batholith of the Gangdese magmatic belt, southern Tibet, comprises predominantly Early Eocene calc-alkaline granitoids that feature a variety of types of magmatic microgranular enclaves and dikes. Previous studies have demonstrated that magma mixing played a crucial role in the formation of the Quxu batholith. However, the specific process...
Magee, Ruadhán Ubide, Teresa Caulfield, John
Eruption onset, style and duration are governed, in part, by the movement and interaction of distinct magma bodies at depth. High-resolution investigation of erupted products can retrospectively inform our understanding of such processes and improve future interpretation of real-time monitoring signals. In 2002-03, Mount Etna (Italy) erupted two el...
Moussallam, Yves Médard, Etienne Georgeais, Guillaume Rose-Koga, Estelle F. Koga, Kenneth T. Pelletier, Bernard Bani, Philipson Shreve, Tara L. Grandin, Raphael Boichu, Marie
...
Published in
Bulletin of Volcanology
In December 2018, an unusually large intra- and extra-caldera eruption took place at Ambrym volcano (Vanuatu). The eruption drained the volcano’s five active lava lakes and terminated, at least momentarily, the surface activity that had been ongoing for decades to hundreds of years, sustaining the largest recorded persistent degassing on the planet...
Ye, Chenyang Feng, Yonggang Lei, Ruxiong Yang, Gaoxue
Published in
Frontiers in Earth Science
The Huangyangshan A-type granitic pluton, distributed along the thrust fault in the Kalamaili region of East Junggar, Xinjiang, China, consists of alkaline granite containing abundant dioritic enclaves that formed via magma mixing. Both the host granite and the enclaves contain sodic amphiboles. The textural evidence indicates that amphiboles cryst...
Keller, Franziska Bachmann, Olivier Geshi, Nobuo Miyakawa, Ayumu
Published in
Frontiers in Earth Science
The Aso-4 caldera-forming event (86.4 ± 1.1 ka, VEI-8) is the second largest volcanic eruption Earth experienced in the past 100 ka. The ignimbrite sheets produced during this event are some of the first ever described compositionally zoned pyroclastic flow deposits exhibiting clear compositional, mineralogical and thermal gradients with stratigrap...
Xie, Hongjing Wang, Yuwang Li, Dedong Zhou, Guochao Zhang, Zhichao
Published in
Journal of Earth Science
The Qingchengzi orefield is an important Pb-Zn-Au-Ag polymetallic orefield in NE China. The Indosinian magmatism has formed the Shuangdinggou batholith and the Xinling stock, as well as dikes of quartz monzonite porphyry and lamprophyre. According to petrographic characteristics, the Shuangdinggou intrusion can be divided into the main suite and th...
Rhodes, Emma Barker, Abigail Burchardt, Steffi Hieronymus, Christoph F. Rousku, S. N. McGarvie, D. W. Mattsson, T. Schmiedel, Tobias Ronchin, E. Witcher, Taylor
...
Although it is widely accepted that shallow silicic magma reservoirs exist, and can feed eruptions, their dynamics and longevity are a topic of debate. Here, we use field mapping, geochemistry, 3D pluton reconstruction and a thermal model to investigate the assembly and eruptive history of the shallow Reyoarartindur Pluton, southeast Iceland. Prima...
Mangler, Martin F. Petrone, Chiara M. Hill, Samuel Delgado-Granados, Hugo Prytulak, Julie
Published in
Frontiers in Earth Science
The Popocatépetl Volcanic Complex (PVC) is an active arc volcano located in central Mexico, 70 km southeast of Mexico City. Current models of the PVC’s plumbing system and magma petrogenesis are largely based on studies of isolated Plinian eruptions over the past 23.5 ka and present-day Vulcanian activity, while voluminous interplinian effusive sum...
