Development of a volcanic risk management system at Mount St. Helens—1980 to present

HMN Wright, CL Driedger, JS Pallister… - Bulletin of …, 2023 - Springer
Here, we review volcanic risk management at Mount St. Helens from the perspective of the
US Geological Survey's (USGS) experience over the four decades since its 18 May 1980 …

Most granitoid rocks are cumulates: deductions from hornblende compositions and zircon saturation

CG Barnes, K Werts, V Memeti, K Ardill - Journal of Petrology, 2019 - academic.oup.com
Cumulate processes in granitic magma systems are thought by some to be negligible and by
others to be common and widespread. Because most granitic rocks lack obvious evidence of …

Making andesites and the continental crust: Mind the step when wet

O Reubi, O Müntener - Journal of Petrology, 2022 - academic.oup.com
Andesites are iconic of subduction zone magmatism. Yet intermediate magmas (57–66 wt%
SiO2) are less abundant than generally thought in arc settings. A comparison of …

[HTML][HTML] Tracking caldera cycles in the Aso magmatic system–Applications of magnetite composition as a proxy for differentiation

F Keller, M Guillong, N Geshi, A Miyakawa… - Journal of Volcanology …, 2023 - Elsevier
Caldera-forming eruptions are among the most hazardous natural events on Earth and pose
a significant risk for global consequences in the future. Recent petrological re-evaluations of …

Central Tibetan adakitic rocks archive the critical impact of water on the Nb/Ta variation in deep crustal melts

YC Zeng, JF Xu, F Huang, XJ Liu, MJ Li… - … et Cosmochimica Acta, 2024 - Elsevier
Nb and Ta are geochemical twins, yet their ratio varies considerably in igneous rocks. It is
generally supposed that felsic melts coexisting with residual rutile will have elevated Nb/Ta …

Amphibole-rich cumulate xenoliths in the Zhazhalong intrusive suite, Gangdese arc: Implications for the role of amphibole fractionation during magma evolution

JS Zhou, ZS Yang, ZQ Hou, Q Wang - American Mineralogist, 2020 - degruyter.com
Amphibole fractionation during the early evolution of arc magmas has been widely inferred
on the basis of distinctive geochemical fingerprints of the evolved melts, although amphibole …

The role of polybaric crystallization in the construction of the Gangdese continental magmatic arc, South Tibet

B Luo, B Ruan, H Zhang, J Song, W Xu, H Yang… - Earth and Planetary …, 2024 - Elsevier
The understanding of storage conditions and evolution processes of igneous rocks is pivotal
in unraveling the architecture and dynamics of trans-crustal magmatic systems. Here we …

Partial melting under shallow-crustal conditions: a study of the Pleistocene caldera eruption of Mendeleev volcano, southern Kuril Island Arc

A Kotov, S Smirnov, I Nizametdinov, M Uno… - Journal of …, 2023 - academic.oup.com
The southern part of the Kuril Island Arc is one of the world's most active modern volcanic
zones, with widespread felsic caldera volcanism, but it has been less well studied compared …

Cumulate mush hybridization by melt invasion: Evidence from compositionally diverse amphiboles in ultramafic–mafic arc cumulates within the Eastern Gangdese …

W Xu, DC Zhu, Q Wang, RF Weinberg… - Journal of …, 2021 - academic.oup.com
Amphibole plays an important role in the petrogenesis and evolution of arc magmas, but its
role is not completely understood yet. Here, a field, petrological, geochronological and …

Revisiting the genesis of the adakite-like granitoids in collisional zones: Water-fluxed melting of intermediate to felsic rocks with dilution by low Sr/Y phases

YH Xie, JJ Schwartz, XW Li, K Cai, B Thomas… - American …, 2024 - degruyter.com
High-Sr/Y granitoids in continental settings are sometimes erroneously regarded as the
products derived from partial melting of thickened/delaminated mafic lower curst under …