Becker, TW - Semantic Scholar
... and subduction velocities decreased rapidly after continental collision, but then remained fairly constant over the last 20–30 Myrs. By inference, the present-day kinematics, for example as recorded by geodesy, may then be representative of the long-term force equilibrium (Meijer and Wortel, 1999). ...
... and subduction velocities decreased rapidly after continental collision, but then remained fairly constant over the last 20–30 Myrs. By inference, the present-day kinematics, for example as recorded by geodesy, may then be representative of the long-term force equilibrium (Meijer and Wortel, 1999). ...
Subduction factory 2. Are intermediate
... fluid. For example, in their classic experimental study of serpentinite, Raleigh and Paterson [1965] reported that dehydration during deformation led to shear fracturing accompanied by a sudden stress drop. These experimental observations imply that dehydration in subducting slabs could cause seismi ...
... fluid. For example, in their classic experimental study of serpentinite, Raleigh and Paterson [1965] reported that dehydration during deformation led to shear fracturing accompanied by a sudden stress drop. These experimental observations imply that dehydration in subducting slabs could cause seismi ...
Adakitic magmas: modern analogues of Archaean granitoids
... never produce TTG-like magmas, thus, strongly supporting the hypothesis of the generation of the Archaean continental crust within a subduction environment. However, Archaean TTG are poorer in Mg, Ni and Cr than adakites, indicating that mantle–magma interactions were less efficient, probably due to ...
... never produce TTG-like magmas, thus, strongly supporting the hypothesis of the generation of the Archaean continental crust within a subduction environment. However, Archaean TTG are poorer in Mg, Ni and Cr than adakites, indicating that mantle–magma interactions were less efficient, probably due to ...
Three-dimensional modelling of crustal motions caused by
... goals of this study is to model the pattern of vertical velocities characterized, as indicated in this ¢gure, by subsidence in the foredeeps along the Adriatic and Ionian coasts, an uplifting zone in the Apennines and Calabrian arc, and broad subsidence in the Tyrrhenian coastal areas. Another salie ...
... goals of this study is to model the pattern of vertical velocities characterized, as indicated in this ¢gure, by subsidence in the foredeeps along the Adriatic and Ionian coasts, an uplifting zone in the Apennines and Calabrian arc, and broad subsidence in the Tyrrhenian coastal areas. Another salie ...
Global earth structure lecture 2 - UC Berkeley Earth and Planetary
... Pyrolite is a synthetic rock invented by Ringwood as a model for experimenting with constitution of the upper an lower mantle. This composition is generally accepted for the uppermost part of the mantle. As we go deeper, differences among various authors increase. In particular, it remains a matter ...
... Pyrolite is a synthetic rock invented by Ringwood as a model for experimenting with constitution of the upper an lower mantle. This composition is generally accepted for the uppermost part of the mantle. As we go deeper, differences among various authors increase. In particular, it remains a matter ...
Thickness of the lithosphere beneath Turkey and
... et al., 2013; Vinnik et al., 2014). Interpretations from these studies are either confined to a limited region or to a limited depth extent, i.e., to crustal depths only. Thus, the variations of lithospheric thickness have not yet been homogeneously characterized in Turkey and surroundings. A robust ...
... et al., 2013; Vinnik et al., 2014). Interpretations from these studies are either confined to a limited region or to a limited depth extent, i.e., to crustal depths only. Thus, the variations of lithospheric thickness have not yet been homogeneously characterized in Turkey and surroundings. A robust ...
The peri-Caribbean ophiolites: structure, tectono
... along the Caribbean Plate margins are presented in the framework of IGCP 433, in order to contribute to the debate on the origin and evolution of the Caribbean Plate. A “near Mid-America” original location of the Jurassic-Cretaceous Caribbean oceanic realm (proto-Caribbean phase) is suggested. Gener ...
... along the Caribbean Plate margins are presented in the framework of IGCP 433, in order to contribute to the debate on the origin and evolution of the Caribbean Plate. A “near Mid-America” original location of the Jurassic-Cretaceous Caribbean oceanic realm (proto-Caribbean phase) is suggested. Gener ...
link to answer key. - Warren County Schools
... _______ is the process by which hot material from deep within the Earth rises while cooler material near the surface sinks. ...
... _______ is the process by which hot material from deep within the Earth rises while cooler material near the surface sinks. ...
Plate Tectonics: Evolution of the Ocean Floor
... The movements of the lithospheric plates are thought to be driven by heat energy transferred through the mantle by convection (CC3). The mantle has areas where its constituent material is upwelled and downwelled. As discussed later in this chapter, the convection processes in the mantle are complex, ...
... The movements of the lithospheric plates are thought to be driven by heat energy transferred through the mantle by convection (CC3). The mantle has areas where its constituent material is upwelled and downwelled. As discussed later in this chapter, the convection processes in the mantle are complex, ...
Reader Chapter 2 In chapter 2 and 3 you can read more about the
... plain or fan, with either a U-shaped or V-shaped cross-section Seamount – an elevation rising 1 km or more above the seafloor, and of limited extent across the summit Shoal – an offshore hazard to navigation with a depth below the sea surface of 20 m or less, usually composed of unconsolidated mater ...
... plain or fan, with either a U-shaped or V-shaped cross-section Seamount – an elevation rising 1 km or more above the seafloor, and of limited extent across the summit Shoal – an offshore hazard to navigation with a depth below the sea surface of 20 m or less, usually composed of unconsolidated mater ...
PDF format - gemoc - Macquarie University
... Previous studies have shown the mantle beneath Lac de Gras to be strongly stratified, having an ultra-depleted shallow layer (>100-140 km), possibly complementary to the overlying arcrelated crust, and a less depleted deep layer (140-220 km), possibly plume-derived (Pearson et al. 1999; Griffin et a ...
... Previous studies have shown the mantle beneath Lac de Gras to be strongly stratified, having an ultra-depleted shallow layer (>100-140 km), possibly complementary to the overlying arcrelated crust, and a less depleted deep layer (140-220 km), possibly plume-derived (Pearson et al. 1999; Griffin et a ...
PDF
... motions. First, the asthenosphere is weakly coupled to the lithosphere and has little effect on its motions[6]. The asthenosphere generally does not flow parallel to the overlying plate. Beneath the interior of an oceanic plate, asthenosphere moves towards the ridge[7], whereas around the plate marg ...
... motions. First, the asthenosphere is weakly coupled to the lithosphere and has little effect on its motions[6]. The asthenosphere generally does not flow parallel to the overlying plate. Beneath the interior of an oceanic plate, asthenosphere moves towards the ridge[7], whereas around the plate marg ...
Where and why do large shallow intraslab earthquakes occur?
... was felt in a wide area, which is a characteristic feature of intraslab events in this area. The 1905 Geiyo earthquake (Event 4) occurred northwest of Shikoku. Close to the epicenter of this earthquake, a large earthquake (the 2001 Geiyo earthquake, Event 3, Mw 6.8) occurred on 24 March 2001 at a de ...
... was felt in a wide area, which is a characteristic feature of intraslab events in this area. The 1905 Geiyo earthquake (Event 4) occurred northwest of Shikoku. Close to the epicenter of this earthquake, a large earthquake (the 2001 Geiyo earthquake, Event 3, Mw 6.8) occurred on 24 March 2001 at a de ...
Huismans
... sedimentary basins can be seen from Figure 2 and from the zonal template (Fig. 3) This template summarizes model predictions to be tested against observations for the case where sedimentation progrades symmetrically across the rift, thereby filling basins in P and S during both synrift phases but le ...
... sedimentary basins can be seen from Figure 2 and from the zonal template (Fig. 3) This template summarizes model predictions to be tested against observations for the case where sedimentation progrades symmetrically across the rift, thereby filling basins in P and S during both synrift phases but le ...
Complex subduction and small-scale convection revealed by body
... lithosphere (Bird, 1979; Zandt et al., 2004), and plumes (Schutt and Dueker, 2008; Smith et al., 2009) both because these processes appear to be active there and because the seismic data are unparalleled. In particular, the transportable array (TA) component of EarthScope's USArray is providing a fu ...
... lithosphere (Bird, 1979; Zandt et al., 2004), and plumes (Schutt and Dueker, 2008; Smith et al., 2009) both because these processes appear to be active there and because the seismic data are unparalleled. In particular, the transportable array (TA) component of EarthScope's USArray is providing a fu ...
ALKALINE PORPHYRY COPPER DEPOSITS AND - Rigeo
... mineralization and magmatic body (proximal versus distal). Such differences are not as evident when comparing the IOCG deposit with alkaline porphyries (Figure 1). There is a clear similarity between the mineralogy and the alteration zones geometry of these two deposit types. These suggest some simi ...
... mineralization and magmatic body (proximal versus distal). Such differences are not as evident when comparing the IOCG deposit with alkaline porphyries (Figure 1). There is a clear similarity between the mineralogy and the alteration zones geometry of these two deposit types. These suggest some simi ...
2.3. New Zealand – Primary Site 1. Background and Motivation
... 2002. Convergence rates at the trench are labeled as red numbers (mm/yr). Pacific/Australia convergence shown by black arrow. Black dashed line shows location of proposed IODP drilling transect. ...
... 2002. Convergence rates at the trench are labeled as red numbers (mm/yr). Pacific/Australia convergence shown by black arrow. Black dashed line shows location of proposed IODP drilling transect. ...
June 2006 in Valdez, Alaska
... Shifting focus to active continental arcs, Mariek Schmidt gave geochronologic and isotopic evidence that the evolution of the Three Sisters volcano is controlled by processes in the upper and lower crust. Sue Kay spoke on the roles of “flat” subduction, subduction erosion, and delamination on the ev ...
... Shifting focus to active continental arcs, Mariek Schmidt gave geochronologic and isotopic evidence that the evolution of the Three Sisters volcano is controlled by processes in the upper and lower crust. Sue Kay spoke on the roles of “flat” subduction, subduction erosion, and delamination on the ev ...
Tertiary stratigraphy and tectonic evolution of southern Sumatra
... The Paleocene-Eocene to early Oligocene subduction is recorded by sporadic occurrences of arc related andesitic volcanics such as the Bandan, Kikim and Tarahan Formations of the Barisan Zone, and sedimentation in the Ombilin and South Sumatra Basins. However, compared to both the earlier upper Creta ...
... The Paleocene-Eocene to early Oligocene subduction is recorded by sporadic occurrences of arc related andesitic volcanics such as the Bandan, Kikim and Tarahan Formations of the Barisan Zone, and sedimentation in the Ombilin and South Sumatra Basins. However, compared to both the earlier upper Creta ...
Auxiliary Material for Plate rotation during continental collision and
... the top left of the figure is for a tracer that started at the surface and at the front of the front of the subducting plate’s continental block. Markers are placed between 0-30 km depth (z-axis) and 0-240 km from the edge of the continental block. See Figure 2 for more details on the start position ...
... the top left of the figure is for a tracer that started at the surface and at the front of the front of the subducting plate’s continental block. Markers are placed between 0-30 km depth (z-axis) and 0-240 km from the edge of the continental block. See Figure 2 for more details on the start position ...
Subduction factory 2. Are intermediate
... fluid. For example, in their classic experimental study of serpentinite, Raleigh and Paterson [1965] reported that dehydration during deformation led to shear fracturing accompanied by a sudden stress drop. These experimental observations imply that dehydration in subducting slabs could cause seismi ...
... fluid. For example, in their classic experimental study of serpentinite, Raleigh and Paterson [1965] reported that dehydration during deformation led to shear fracturing accompanied by a sudden stress drop. These experimental observations imply that dehydration in subducting slabs could cause seismi ...
Chapter 13 Next Generation Sunshine State Standards
... of the coastal areas that surround the Atlantic Ocean, including the east coasts of North and South America, as well as the coastal areas of western Europe and Africa. Passive margins are not associated with plate boundaries and therefore experience very little volcanism and few earthquakes. Here, w ...
... of the coastal areas that surround the Atlantic Ocean, including the east coasts of North and South America, as well as the coastal areas of western Europe and Africa. Passive margins are not associated with plate boundaries and therefore experience very little volcanism and few earthquakes. Here, w ...
7-3 Plate Tectonics Test
... b. moves plates apart from one another c. lifts and splits the lithosphere d. creates a divergent boundary ____ 24. Features found at divergent plate boundaries include ____. a. mid-ocean ridges c. crumpled mountains b. deep-sea trenches d. island arc volcanoes ____ 25. Crust is neither destroyed no ...
... b. moves plates apart from one another c. lifts and splits the lithosphere d. creates a divergent boundary ____ 24. Features found at divergent plate boundaries include ____. a. mid-ocean ridges c. crumpled mountains b. deep-sea trenches d. island arc volcanoes ____ 25. Crust is neither destroyed no ...
India and Sunda plates motion and deformation along
... can now fear farther north on the Arakan Trench, along the Myanmar – Bangladesh border. [3] The aim of this paper is to study how the relative India – Sunda motion is accommodated in Myanmar, and in particular the style and rate of deformation along the two main active structures, the Arakan Trench ...
... can now fear farther north on the Arakan Trench, along the Myanmar – Bangladesh border. [3] The aim of this paper is to study how the relative India – Sunda motion is accommodated in Myanmar, and in particular the style and rate of deformation along the two main active structures, the Arakan Trench ...
Oceanic trench
The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor. Oceanic trenches are a distinctive morphological feature of convergent plate boundaries, along which lithospheric plates move towards each other at rates that vary from a few mm to over ten cm per year. A trench marks the position at which the flexed, subducting slab begins to descend beneath another lithospheric slab. Trenches are generally parallel to a volcanic island arc, and about 200 km (120 mi) from a volcanic arc. Oceanic trenches typically extend 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic floor. The greatest ocean depth to be sounded is in the Challenger Deep of the Mariana Trench, at a depth of 11,034 m (36,201 ft) below sea level. Oceanic lithosphere moves into trenches at a global rate of about 3 km2/yr.