· This is the Back-arc. It is thought that Back-arc spreading is caused by “roll-back” of the subduction zone. Effectively the trench is moving to the east and the upper …
Between November 29 and December 20, 2016, a team led by scientists from the University of Washington, Oregon State University, and NOAA Pacific Marine Environmental …
· Focusing on the Back-Arc. In November 2015, Principal Investigator Joseph Resing, of the University of Washington, led a team …
· 2016 Mariana back-arc, R/V Falkor Expedition/ROV SuBastian: . EOI and collaborators were the first scientists using the new Schmidt Ocean Institute’s ROV SuBastian aboard the R/V Falkor as they returned …
This 3-D sketch shows a cross-section of the Mariana Arc with some of its main structures and features. The numbers represent the speed of sound in the various layers beneath the arc measured by the precise timing …
· 1. Introduction [2] Back-arc spreading of the Mariana Trough is of interest in terms of the mechanism of plate interaction, subduction, and the formation of island arcs. …
· The southern Mariana Arc–Trench system is rapidly deforming, resulting in unusual interactions between arc and back‐arc basin (BAB) magmatic systems. New …
· Solid red line is the back-arc spreading center. Southern Mariana Bathymetry of the southern Mariana arc region, showing all 25 edifices presently named along the volcanic front between 12°30’ and 16°10’N, …
· The Izu-Bonin-Mariana (IBM) intra-oceanic arc provides an ideal location to investigate island arc maturation. The fore-arc crust, which formed long before the …
· Exploration of 600 km of the southern Mariana back arc found 19 active vent sites, 13 more than in the authoritative InterRidge Database Back-arc ridges with high …
· 1 Introduction. The Mariana back-arc in the western Pacific is a slow-spreading center with highly complex tectonics with variable magmatic and hydrothermal activity (Figure 1).Processes of crustal accretion in the …
The IBM (Izu-Bonin-Mariana) Arc System is an excellent example of a convergent plate margin. It is 2500 km long convergent margin that extends south from Tokyo, Japan, ... The distribution of strain and tectonic style varies simply along strike of the arc system, with back-arc spreading in the southern third, intra-arc rifting in the northern ...
· [1] A high-resolution seismic velocity model is presented for the crust and upper mantle of the Mariana arc–back-arc system (MABS) based on active source seismic profiling. The major characteristics are (1) slow mantle velocity of <8 km s −1 in the uppermost mantle, especially, and deep reflectors under the Mariana arc (MA) and the …
· The southern Mariana Arc–Trench system is rapidly deforming, resulting in unusual interactions between arc and back‐arc basin (BAB) magmatic systems. New geochemical data for volcanoes in this region are presented and explored. Tracey Seamount, an extinct submarine volcano about 30 km northwest of Guam, is the …
· The Mariana Trough Back-arc Basin . The asymmetric seafloor spreading experienced in the Mariana Trough can be seen by comparing its western edge to its central area. For example, in the central region of this formation, the speed of spreading is estimated at between 2 and 3 times greater than that found in the western edge. The …
· The Mariana, east Scotia, Lau, and Manus back-arc basins (BABs) have spreading rates that vary from slow (<50 mm/yr) to fast (>100 mm/yr) and extension axes located from 10 to 400 km behind their island arcs. Axial lava compositions from these BABs indicate melting of mid-ocean ridge basalt (MORB)-like sources in proportion to the …
· 时间： 浏览： 664. 2020年11月，国际著名地学杂志《Geochimica et Cosmochimica Acta》以“The characteristics of Fe speciation and Fe-binding ligands in the Mariana back-arc hydrothermal plumes”为题发表了我院王虎副研究员和合作者的研究成果。. 海底热液喷口是海洋与地壳之间物质和 ...
· 1. Introduction [2] One of the enigmas of convergent margin evolution is the existence of periodic phases of extension that result in arc rifting and back-arc basin formation. The processes associated with the rifting and subsequent separation of continental lithosphere have been a major research focus and drilling objective [e.g., …
· The modern Mariana arc includes from west to east, the Mariana Trough (back-arc basin), the active Mariana arc, the old Mariana forearc (including the islands of Saipan, Tinian, Aguijan, Rota, and ...
At 6 Ma, an asthenospheric upwelling caused the Mariana Island Arc crust to split into two ridges and a trough. Rift structures were formed along the trough axis, with eruptions of tholeiitic ...
· The Mariana Arc includes more than 60 underwater volcanoes, known as seamounts. And scientists have seen big changes along that arc in recent years. ... Some of the magma then pushes back toward the surface, forming the seamounts and the exposed islands. Expeditions in 2004 and 2006 discovered that many of the seamounts were …
This 3-D sketch shows a cross-section of the Mariana Arc with some of its main structures and features. The numbers represent the speed of sound in the various layers beneath the arc measured by the precise timing …
The Mariana back-arc spreading center is located to the west of the volcanic arc and transitions from a relatively shallow ridge in the south (∼3000 m bsl) to a series of deep basins (up to 5000 m bsl) north of 13°N that are …
· The Mariana back-arc eruption was first discovered in December of 2015 by cameras aboard an autonomous underwater vehicle, Sentry. Photos revealed the presence of a pristine dark, glassy lava flow …
· The Mariana Trough Back-arc Basin . The asymmetric seafloor spreading experienced in the Mariana Trough can be seen by comparing its western edge to its central area. For example, in the central region of this formation, the speed of spreading is estimated at between 2 and 3 times greater than that found in the western edge. The …
· The relationships between tectonic processes, magmatism, and hydrothermal venting along ∼600 km of the slow‐spreading Mariana back‐arc between 12.7°N and 18.3°N reveal a number of similarities and differences compared to slow‐spreading mid‐ocean ridges. Analysis of the volcanic geomorphology and structure highlights the complexity of …
· Community Structure of Lithotrophically-Driven Hydrothermal Microbial Mats from the Mariana Arc and Back-Arc Front Microbiol. 2017 Aug 28 ... (SSU) rRNA gene from 22 microbial mats collected from four hydrothermally active locations along the Mariana Arc and back-arc to explore the structure of lithotrophically-based microbial mat communities ...
· The modern Mariana arc includes from west to east, the Mariana Trough (back-arc basin), the active Mariana arc, the old Mariana forearc (including the islands of Saipan, Tinian, Aguijan, Rota, and ...
· The characteristics of Fe speciation and Fe-binding ligands in the Mariana back-arc hydrothermal plumes[J]. Geochimica Et Cosmochimica Acta , 2021,292:24-36. Wang J, Dong L. Memory-efficient frequency-domain Gauss-Newton method for wave-equation first-arrival traveltime inversion[J].
At 6 Ma, an asthenospheric upwelling caused the Mariana Island Arc crust to split into two ridges and a trough. Rift structures were formed along the trough axis, with eruptions of tholeiitic ...
The Mariana back-arc spreading center is located to the west of the volcanic arc and transitions from a relatively shallow ridge in the south (∼3000 m bsl) to a series of deep basins (up to 5000 m bsl) north of 13°N that are …
· The central Mariana back-arc is a deep, unsedimented, basalt-hosted, slow-spreading center (25–40 mm/year) that has hydrothermal vent fields from 3200 to 3950 m deep, and is distinct in depth, morphology, and spatial frequency of hydrothermal vent sites from the shallower- and faster-spreading Mariana back-arc south of 13.5°N [23, 34, 35].
The first cycle of arc splitting (∼30–15 Ma) formed the Parece Vela and Shikoku back-arc basins and stranded the remnant Palau Kyushu Arc ( Fig. 1). The second cycle created the back-arc basin of the Mariana Trough (starting at ∼7 Ma), forming the remnant arc of the West Mariana Ridge in the south.
· The central Mariana back-arc is a deep, unsedimented, basalt-hosted, slow-spreading center (25–40 mm/year) that has hydrothermal vent fields from 3200 to 3950 m deep, and is distinct in depth ...
We have detected large plumes of methane-enriched water in the Mariana Trough back-arc basin7 and also in the summit crater of Loihi Seamount7 at the present site of the Hawaiian hotspot, thus establishing the widespread existence of ‘off-ridge’ hydro-thermal vents in the ocean. However, although the Loihi vents produce plumes enriched in ...
· The Mariana convergent margin is a classic trench-volcanic arc-back arc system in the western Pacific. The deepest point on the Earth's surface, the Challenger Deep, is found at its southern end, just to the south of the U.S. territory of Guam. To the north the Mariana convergent margin transitions into the Izu-Bonin arc, which eventually ...
Back-arc basins are sites of significant hydrothermal activity, and the deep-sea vents that occur in these regions often harbour diverse biological communities. Examples of back-arc basins include the Sea of Japan, the …
· A new episode of rifting to form the Mariana Trough back-arc basin began sometime after 10 Ma, with seafloor spreading beginning about 3–4 Ma. Because disruption of the arc is the first stage in forming any …
· Community Structure of Lithotrophically-Driven Hydrothermal Microbial Mats from the Mariana Arc and Back-Arc Front Microbiol. 2017 Aug 28 ... (SSU) rRNA gene from 22 microbial mats collected from four hydrothermally active locations along the Mariana Arc and back-arc to explore the structure of lithotrophically-based microbial mat communities ...
At 6 Ma, an asthenospheric upwelling caused the Mariana Island Arc crust to split into two ridges and a trough. Rift structures were formed along the trough axis, with eruptions of tholeiitic ...