Thursday, May 13, 2021
plate tectonics

plate tectonics

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Using a method to better locate the source of weak tremors from regions with complex geological features, researchers found that many tremors originate from the shear zone, an area of high fluid pressure, in the Nankai Trough, which is schematically shown here with structures of tectonic plates and fault lines.
plate tectonics

Making sense of commotion under the ocean to locate tremors near...

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The Middle America Trench, seen here as a dark blue strip off the Pacific coast of Central America, is a surface feature of a subduction zone extending from Mexico to Costa Rica. Credit: NOAA
plate tectonics

Subduction may recycle less water than thought

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Mylonite is a fine-grained, compact metamorphic rock produced by dynamic recrystallization of the constituent minerals resulting in a reduction of the grain size of the rock. Credit: Wikipedia
plate tectonics

Going with the grains to explain a fundamental tectonic force

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39 Ocean Bottom Seismometers where deployed on the ocean floor across the Mid-Atlantic Ridge as part of the PI-LAB experiment. Credit: University of Southampton
plate tectonics

Geological phenomenon widening the Atlantic Ocean

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Photo: © Christian S. Marien
plate tectonics

Slow start of plate tectonics despite a hot early Earth

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Looking at the Toaroha River, near New Zealand’s Alpine Fault. | GNS Science
plate tectonics

Seismic activity of New Zealand’s alpine fault more complex than suspected

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The quantitative model used in the study explains the enigmatic melt degrees and layered structures observed in most cratons on Earth.
plate tectonics

Continents prone to destruction in their infancy, study finds

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Distribution of snow and ice in winter and summer on Aurica (left) and Amasia. Credit: Way et al. 2020
plate tectonics

What will the climate be like when Earth’s next supercontinent forms?

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Schematic diagram showing the geometry of a typical subduction zone and the production of arc volcanoes. Credit: Xiaotao Yang
plate tectonics

Piecing together the Alaska coastline’s fractured volcanic activity

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A graphic showing the convective heat cycle (red arrows) that drives plate tectonic motion (black arrows) on Earth. Heat flows toward subduction zones through the uppermost mantle layer, the asthenosphere. A computer model from Rice University finds that the asthenosphere can locally drag plates along with it rather than acting exclusively as a brake on plate movements as had been widely believed. (Image courtesy of Surachit/Wikimedia Commons)
plate tectonics

Former piece of Pacific Ocean floor imaged deep beneath China

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Final model for the East African Rift System. Hashed lines indicate newly discovered broad deforming zone. Arrows represent predicted tectonic plate motions. ABFZ—Andrew Bain Fracture Zone; IFZ—Indomed Fracture Zone; RSZ—Ranotsara shear zone. Figure created by D.S. Stamps.
plate tectonics

East African Rift System is slowly breaking away, with Madagascar splitting...

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The journey of Hawaii's pancake from its creation at the mantle plume to where it slipped under the Pacific plate and sunk deep into the Earth's mantle. Credit: Michigan State University
plate tectonics

Researchers discover ‘missing’ piece of Hawaii’s formation

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Three-dimensional visualisation of partial melting at the base of tectonic plates. The orange iso-surfaces show the regions where, at a depth of between 100 and 300 km, the quantity of molten rock is greater than 0.2%. The white sphere in the centre of the globe represents the Earth’s core. Credit © Stéphanie Durand, Laboratoire de géologie de Lyon: Terre, planètes et environnement (CNRS/ENS de Lyon/Université Claude Bernard Lyon 1).
plate tectonics

Deep magma facilitates the movement of tectonic plates

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A 3D block diagram across North America showing a mantle tomography image reveals the Slab Unfolding method used to flatten the Farallon tectonic plate. By doing this, Fuston and Wu were able to locate the lost Resurrection plate.
plate tectonics

Lost and found: Geologists ‘resurrect’ missing tectonic plate

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Central Alps of Switzerland
plate tectonics

Formation of the Alps: Detaching and uplifting, not bulldozing

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carbon cycle
plate tectonics

Understanding Earth’s ‘deep-carbon cycle’

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Location and geological map of Yukinoura district, Saikai City, Nagasaki Prefecture, Japan. Credit: Professor Tadao Nishiyama
plate tectonics

Japan’s geologic history in question after discovery of metamorphic rock microdiamonds

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Minerals inside tiny crystals could reveal how Earth's crust began moving.
plate tectonics

Unearthing evidence for the origins of plate tectonics

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The Dipping Moho is a sign of one continent being thrust over another. Credit: IGG
plate tectonics

Plate tectonics goes global

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Graduate student Mike Duvall is pictured here in southeastern Nepal during fieldwork in 2017. Image credit: John Waldron
plate tectonics

Scientists discover fault system in southeastern Nepal

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