| 单词 | subduct |
| 例句 | Research indicates that over billions of years, surface water has been transported deep into the Earth by descending, or subducted, tectonic plates. Earth's surface water dives deep, transforming core's outer layer 2023-11-13T05:00:00Z The host rocks to the diamonds became buoyant during diamond formation, transporting subducted mantle material plus the diamonds. Ancient diamonds shine light on the evolution of Earth 2023-10-18T04:00:00Z That research looked at imaging of Earth's middle layer, the mantle, where the subducted crust ends up. Scientists Discover Ghost of Ancient Mega-Plate That Disappeared 20 Million Years Ago 2023-10-17T04:00:00Z The previous predictions of the existence of Pontus were made possible because a subducted plate leaves behind traces when it 'sinks' into the earth's mantle: zones in the mantle with anomalous temperatures or compositions. Plate tectonic surprise: Geologist unexpectedly finds remnants of a lost mega-plate 2023-10-09T04:00:00Z Much of this apparently new gas, however, is recycled material that has been subducted through plate tectonics. Astronomy 2016-10-13T00:00:00Z Illustration of Earth's interior revealing subducting water and a rising plume of magma. Earth's surface water dives deep, transforming core's outer layer 2023-11-13T05:00:00Z The sediments accumulated in a basin that is thought to have been at least partly formed by the presence of a subducting slab of oceanic lithosphere underneath this part of North America. Physical Geology 2015-01-01T00:00:00Z Since both plates are made of oceanic lithosphere, it is usually the older plate that subducts because it is colder and denser. An Introduction to Geology 2017-01-01T00:00:00Z Mitchell calls these zones “subduction girdles,” because the continental plates, too thick to subduct, go there and “get stuck,” he says. What might Earth’s next supercontinent look like? New study provides clues 2021-01-21T05:00:00Z In general, the thick continental masses cannot be subducted, but the thinner oceanic plates can be rather readily thrust down into the upper mantle. Astronomy 2016-10-13T00:00:00Z At the interface where subducting water meets the core, a chemical exchange occurs to form a hydrogen-rich layer in the topmost outer core and dense silica in the bottom of the mantle. Earth's surface water dives deep, transforming core's outer layer 2023-11-13T05:00:00Z As discussed in the context of subduction- related volcanism in Chapter 4, the significant volume of water within the subducting material is released as the subducting crust is heated. Physical Geology 2015-01-01T00:00:00Z If continental and oceanic lithosphere are fused on the same plate, it can partially subduct but its buoyancy prevents it from fully descending. An Introduction to Geology 2017-01-01T00:00:00Z It is clearly not possible to tally the total volume of subducted water without knowing the full hydration depth. Water takes a deep dive into an oceanic tectonic plate 2018-11-13T05:00:00Z The subducted plate is forced down into regions of high pressure and temperature, eventually melting several hundred kilometers below the surface. Astronomy 2016-10-13T00:00:00Z But one plate will never subduct below another to remove excess carbon dioxide or form the volcanoes that spew more carbon dioxide into the atmosphere. Earth's Tectonic Activity May Be Crucial for Life -- and Rare in Our Galaxy 2017-07-20T04:00:00Z The largest earthquakes occur near the surface where the subducting plate is still cold and strong. Physical Geology 2015-01-01T00:00:00Z Water carried by subducted oceanic plates causes melting in the upper mantle material. An Introduction to Geology 2017-01-01T00:00:00Z When one plate hits another and begins to dive downwards — or subduct — it melts and becomes incorporated in the underlying ice, the duo proposes. Plate tectonics found on Europa 2014-09-06T04:00:00Z The researchers suggest these diamonds crystallized when diamond-forming fluids that originated in basalt from ocean crust subducted into the lower mantle. 'Superdeep' Diamonds Hint at Depth of Carbon Cycle 2011-09-16T17:45:05.187Z As a result, bits of the African plate that did subduct have broken off and are descending to the Earth's mantle. Europe's future lies under Africa 2011-04-11T09:32:55Z The boundary between the subducting Juan de Fuca Plate and the North America Plate can be divided into three segments, as shown below. Physical Geology 2015-01-01T00:00:00Z Instead of descending directly into the mantle, the subducting plate shallowed out and moved eastward beneath the continental plate affecting the overlying continent hundreds of miles east of the continental margin and building high mountains. An Introduction to Geology 2017-01-01T00:00:00Z It is heated up, and while there isn’t enough heat to melt the subducting crust, there is enough to force the water out of some of its minerals. Physical Geology 2015-01-01T00:00:00Z At an ocean-continent convergent boundary, part of a plate that is made up of oceanic crust is subducting beneath part of another plate made up of continental crust. Physical Geology 2015-01-01T00:00:00Z At convergent boundaries magma is formed where water from a subducting plate acts as a flux to lower the melting temperature of the adjacent mantle rock. Physical Geology 2015-01-01T00:00:00Z Trench basins form where a subducting oceanic plate dips beneath the overriding continental or oceanic crust. Physical Geology 2015-01-01T00:00:00Z As the mid-ocean ridge itself started to subduct, the relative motion had changed. An Introduction to Geology 2017-01-01T00:00:00Z Most blueschist forms in subduction zones, continues to be subducted, turns into eclogite at about 35 km depth, and then eventually sinks deep into the mantle — never to be seen again. Physical Geology 2015-01-01T00:00:00Z In only a few places in the world, where the subduction process has been interrupted by some tectonic process, has partially subducted blueschist rock returned to the surface. Physical Geology 2015-01-01T00:00:00Z The background seismicity at this convergent boundary, and on other similar ones, is predominantly near the upper side of the subducting plate. Physical Geology 2015-01-01T00:00:00Z At subduction zones, water from the wet, subducting oceanic crust is transferred into the overlying hot mantle. Physical Geology 2015-01-01T00:00:00Z The oceanic lithospheric plates on either side of the Atlantic Ocean for example, are denser than the underlying asthenosphere and are not subducting beneath the continental plates. An Introduction to Geology 2017-01-01T00:00:00Z When oceanic crust connected by a passive margin to continental crust completely subducts beneath a continent, an ocean basin closes, and continental collision begins. An Introduction to Geology 2017-01-01T00:00:00Z However, any rocks with proof of this have been subducted under the ocean floor. An Introduction to Geology 2017-01-01T00:00:00Z The subducting slab contains oceanic lithosphere and hydrated minerals. An Introduction to Geology 2017-01-01T00:00:00Z The blue arrows represent water being transferred from the subducting plates into the overlying mantle. Physical Geology 2015-01-01T00:00:00Z When a subducting slab becomes stuck and cannot descend, a massive amount of energy builds up between the stuck plates. An Introduction to Geology 2017-01-01T00:00:00Z Subduction was shallow at this time because a very young, hot and less dense portion of the Farallon plate was subducted. An Introduction to Geology 2017-01-01T00:00:00Z Subduction caused a relative convergence between the subducting Farallon plate and the North American plate. An Introduction to Geology 2017-01-01T00:00:00Z This caused magmatism as the subducting slab sank, allowing asthenosphere material to rise around it. An Introduction to Geology 2017-01-01T00:00:00Z Often it is the older and colder plate that is denser and subducts beneath the younger and hotter plate. Physical Geology 2015-01-01T00:00:00Z When the descending slab subducts at a low angle, there is more contact between the slab and the overlying continental plate than in a typical subduction zone. An Introduction to Geology 2017-01-01T00:00:00Z Water carried by subducted oceanic plates causes melting in the upper mantle material. An Introduction to Geology 2017-01-01T00:00:00Z Within the trench, ocean floor sediments are scraped together and compressed between the subducting and overriding plates. An Introduction to Geology 2017-01-01T00:00:00Z |
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