Results 81 to 90 of about 74,121 (304)

Garnet–Clinopyroxene Double‐Layered Coronae in a Metagabbronorite From the High‐Grade Metamorphic Gföhl Unit, Moldanubian Zone

open access: yesJournal of Metamorphic Geology, EarlyView.
ABSTRACT This study investigates garnet–clinopyroxene double‐layered coronae in a metagabbronorite from the high‐grade metamorphic Gföhl Unit (Bohemian Massif). The coronae formed at the interfaces between relic magmatic orthopyroxene, still preserved in the cores of the coronae, and the plagioclase‐rich rock matrix.
Rene Asenbaum   +5 more
wiley   +1 more source

Profundum solomoni (Amphipoda: Uristidae) Exhibits a Disjunct Geographic Distribution at Hadal Depths Across the San Cristobal Trench, Santa Cruz Trench and Nova Canton Trough

open access: yesZoologica Scripta, EarlyView.
ABSTRACT Hadal environments (> 6000 m ocean depths) are often viewed as isolated locations with high species endemism due to limited dispersal. However, molecular studies continue to reveal greater complexity that questions historical perceptions. Recent population genetic studies focused on scavenging amphipods have identified broadly distributed ...
Brett C. Gonzalez   +2 more
wiley   +1 more source

2021 Alaska earthquake: entropy approach to its precursors and aftershock regimes [PDF]

open access: yesNatural Hazards and Earth System Sciences
We have conducted an entropy analysis in Alaska, a seismic-rich region in a subduction zone that exhibits a nontrivial behavior: the subduction arc alters the seismic activity from the eastern zone to the western zone, demonstrating a decrease in ...
E. E. Vogel   +7 more
doaj   +1 more source

The spatial distribution characteristics of Nb–Ta of mafic rocks in subduction zones

open access: yesOpen Geosciences, 2021
High field-strength elements have been regarded as one of the most important discriminations in subduction zone magma. However, the spatial distribution of Nb and Ta in subduction zone-related rocks has been rarely studied; it is still unclear whether ...
Li Weiwei   +4 more
doaj   +1 more source

Makran Subduction Zone: A Review and Synthesis

open access: yesGeosciences
This review synthesizes existing research to elucidate the factors driving the distinct tectonic behaviors in the western and eastern Makran subduction zone, focusing on seismic activity, uplift rate, convergence rate, coupling, and subduction angle. The
Peyman Namdarsehat   +3 more
doaj   +1 more source

Pressure, temperature and time constraints on tectonic models for southwestern Sweden [PDF]

open access: yes, 2010
In this work, a number of key localities have been investigated in detail in order to provide precise constraints on models for the tectonic evolution of southern Sweden.
Austin Hegardt, Eric
core   +1 more source

Waveforms and results of seismic attenuation in Sumatra subduction zone, Indonesia

open access: gold, 2021
Yudha Styawan   +5 more
openalex   +3 more sources

Rapid subduction initiation and magmatism in the Western Pacific driven by internal vertical forces

open access: yesNature Communications, 2020
The magmatic progression produced during the initiation of the Izu-Bonin-Marianas subduction zone took place rapidly over 1 million years, but it has been unclear why.
B. Maunder   +3 more
doaj   +1 more source

Variations in the crustal structure and strength of plate coupling along the Ryukyu subduction zone

open access: yesGeoscience Letters, 2023
The Ryukyu trench-arc-back arc system is part of the subduction margins of the Philippine Sea plate. Previous studies have indicated that several geophysical and geological characteristics reveal significant variations (including convergent rate ...
Wen-Bin Doo   +4 more
doaj   +1 more source

Earth's rotation variability triggers explosive eruptions in subduction zones [PDF]

open access: yes, 2015
The uneven Earth’s spinning has been reported to affect geological processes, i.e. tectonism, seismicity and volcanism, on a planetary scale. Here, we show that changes of the length of day (LOD) influence eruptive activity at subduction margins ...
CUFFARO, Marco   +3 more
core   +2 more sources

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