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... escaped into its present position by the opening of Savu Basin. and Sumba was part of Timor and escaped to its present position after the collision of TimorAustralian continent and by the opening of the Savu Basin AudleyCharles. Rigg and Hall. . . Wensink.. . This is one of the reasons for relating ...
... escaped into its present position by the opening of Savu Basin. and Sumba was part of Timor and escaped to its present position after the collision of TimorAustralian continent and by the opening of the Savu Basin AudleyCharles. Rigg and Hall. . . Wensink.. . This is one of the reasons for relating ...
Downdip landward limit of Cascadia great earthquake rupture
... physical controls of subduction thrust rupture globally. The constraints are (1) “locked/ transition” zones from geodetic deformation (GPS, repeated leveling, tide gauges); (2) rupture zone from paleoseismic coastal marsh subsidence, “paleogeodesy”; (3) temperature on the thrust for the seismic-asei ...
... physical controls of subduction thrust rupture globally. The constraints are (1) “locked/ transition” zones from geodetic deformation (GPS, repeated leveling, tide gauges); (2) rupture zone from paleoseismic coastal marsh subsidence, “paleogeodesy”; (3) temperature on the thrust for the seismic-asei ...
Carbon Retention in Deeply Subducted Sedimentary Rocks
... Metamorphism of subducting oceanic crust and carbonate-rich seafloor sediments likely plays an important regulatory role in the long-term global C cycle by controlling the fraction of subducting C emitted into the atmosphere via arc volcanic gases as compared with the fraction of C continuing into t ...
... Metamorphism of subducting oceanic crust and carbonate-rich seafloor sediments likely plays an important regulatory role in the long-term global C cycle by controlling the fraction of subducting C emitted into the atmosphere via arc volcanic gases as compared with the fraction of C continuing into t ...
thrust systems - The Web site cannot be found
... compression, is valid for the three stages of plate convergence defined according to their timing relative to ocean closure: - Pre-collision tectonics involves subduction of oceanic material with the eventual formation of accretionary wedges and local obduction of ophiolites. Convergence causes thru ...
... compression, is valid for the three stages of plate convergence defined according to their timing relative to ocean closure: - Pre-collision tectonics involves subduction of oceanic material with the eventual formation of accretionary wedges and local obduction of ophiolites. Convergence causes thru ...
The Origin, Evolution and Present State of Subcontinental Lithosphere
... Why Beijing, China? We choose to hold such a conference in Beijing, China, because eastern China, especially the North China Craton (also known as Sino-Korean Craton), presents us with an excellent modern example of SCLM thinning since the Mesozoic. The existence of Paleozoic diamondiferous kimberli ...
... Why Beijing, China? We choose to hold such a conference in Beijing, China, because eastern China, especially the North China Craton (also known as Sino-Korean Craton), presents us with an excellent modern example of SCLM thinning since the Mesozoic. The existence of Paleozoic diamondiferous kimberli ...
Geophysical Journal International - E
... The Gibraltar arc, the Betic orogenic belt and its Moroccon counterpart, the Rif, formed during the Miocene continent–continent collision between Iberia and Africa. During the collision, the Alboran domain thrust westward (e.g. Platt et al. 2003) over the previously thinned Iberian and Maghrebian pa ...
... The Gibraltar arc, the Betic orogenic belt and its Moroccon counterpart, the Rif, formed during the Miocene continent–continent collision between Iberia and Africa. During the collision, the Alboran domain thrust westward (e.g. Platt et al. 2003) over the previously thinned Iberian and Maghrebian pa ...
Serpentinization of the forearc mantle
... both expected and observed. Large volumes of aqueous fluids must be released upwards by dehydration reactions in subducting oceanic crust and sediments. Subduction of oceanic lithosphere cools the overlying forearc such that low temperature hydrous serpentine minerals are stable in the forearc mantl ...
... both expected and observed. Large volumes of aqueous fluids must be released upwards by dehydration reactions in subducting oceanic crust and sediments. Subduction of oceanic lithosphere cools the overlying forearc such that low temperature hydrous serpentine minerals are stable in the forearc mantl ...
What drives microplate motion and deformation in the northeastern
... subduction of the Bahamas Platform beneath the Caribbean plate, hereafter refered to as “Bahamas Collision”, is usually invoked to explain differential velocities in the northeastern Caribbean plate boundary zone [Mann et al., 2002]. The Bahamas Platform itself, however, shows no signs of significa ...
... subduction of the Bahamas Platform beneath the Caribbean plate, hereafter refered to as “Bahamas Collision”, is usually invoked to explain differential velocities in the northeastern Caribbean plate boundary zone [Mann et al., 2002]. The Bahamas Platform itself, however, shows no signs of significa ...
Behavior of subducting sediments beneath an arc under a high
... Archean period. However, chert, shale and banded iron formations are common in the Archean Greenstone belt (Windley, 1995), indicating that the sediment subduction had already occurred at the Archean time. If this is the case, sediment melting within a slab is also a likely consequence of subduction ...
... Archean period. However, chert, shale and banded iron formations are common in the Archean Greenstone belt (Windley, 1995), indicating that the sediment subduction had already occurred at the Archean time. If this is the case, sediment melting within a slab is also a likely consequence of subduction ...
Miocene and Early Pliocene Epithermal Gold
... Numerous important Miocene and early Pliocene epithermal Au-Ag deposits are present in the northern Great Basin. Most deposits are spatially and temporally related to two magmatic assemblages: bimodal basaltrhyolite and western andesite. These magmatic assemblages are petrogenetic suites that reflec ...
... Numerous important Miocene and early Pliocene epithermal Au-Ag deposits are present in the northern Great Basin. Most deposits are spatially and temporally related to two magmatic assemblages: bimodal basaltrhyolite and western andesite. These magmatic assemblages are petrogenetic suites that reflec ...
Mechanical (de-)coupling of the lithosphere in the Valencia Trough
... many geophysical surveys that yielded a highquality database. Signi¢cant parts of these studies have been summarized and reviewed in [29^32]. The rift basin started to open during Late Oligocene over an inverted Mesozoic basin that was subjected to non-deposition and erosion during most of the Paleo ...
... many geophysical surveys that yielded a highquality database. Signi¢cant parts of these studies have been summarized and reviewed in [29^32]. The rift basin started to open during Late Oligocene over an inverted Mesozoic basin that was subjected to non-deposition and erosion during most of the Paleo ...
TROPICS Continent-Building in Costa Rica
... volcanic history is sparse. No slab seems to be present, likely due to change in the plate tectonic configuration ~10 Ma. As we will discuss below, this north/south, subduction/no-subduction dichotomy will allow for informative comparisons between the two regions. Originally, Central America was mai ...
... volcanic history is sparse. No slab seems to be present, likely due to change in the plate tectonic configuration ~10 Ma. As we will discuss below, this north/south, subduction/no-subduction dichotomy will allow for informative comparisons between the two regions. Originally, Central America was mai ...
Mobility and immobility of mid-ocean ridges and their
... Ridge (SMAR) shows small lateral migration but indicates extensive longitudinal migration toward north (Figure 2ii). Similarly, the northern EPR and the Juan de Fuca ridge segments appear to have migrated northerly at least since about 83Ma (Chron 34) to the Present (Figure 21). The SMAR runs betwee ...
... Ridge (SMAR) shows small lateral migration but indicates extensive longitudinal migration toward north (Figure 2ii). Similarly, the northern EPR and the Juan de Fuca ridge segments appear to have migrated northerly at least since about 83Ma (Chron 34) to the Present (Figure 21). The SMAR runs betwee ...
Ar– Ar ages of intrusions in East Greenland: Rift-to
... is segmented by tectonic lineaments trending approximately orthogonal to the continent–ocean boundary that are explained as major accommodation zones (Karson and Brooks, 1999; Klausen and Larsen, 2002). Of these lineaments, the Kangerlussuaq Fjord is the most prominent and it has been suggested to r ...
... is segmented by tectonic lineaments trending approximately orthogonal to the continent–ocean boundary that are explained as major accommodation zones (Karson and Brooks, 1999; Klausen and Larsen, 2002). Of these lineaments, the Kangerlussuaq Fjord is the most prominent and it has been suggested to r ...
Major Gold Deposits and Belts of the North and South American
... A compilation of economically viable gold concentrations containing ≥10 Moz in the North and South American Cordillera reveals the existence of 22 discrete belts in addition to five major isolated deposits, most formed over the last 150 m.y. The gold concentrations are attributed to eight widely rec ...
... A compilation of economically viable gold concentrations containing ≥10 Moz in the North and South American Cordillera reveals the existence of 22 discrete belts in addition to five major isolated deposits, most formed over the last 150 m.y. The gold concentrations are attributed to eight widely rec ...
Mobility and immobility of mid-ocean ridges and their implications to
... The observations that the SWIR may be tapping the same portion of the mantle as did the CIR, and the correlation between absolute migration velocity and the depth of origin of mid-ocean ridges has far-reaching thermal and chemical implications. One of the most important dynamic processes in the eart ...
... The observations that the SWIR may be tapping the same portion of the mantle as did the CIR, and the correlation between absolute migration velocity and the depth of origin of mid-ocean ridges has far-reaching thermal and chemical implications. One of the most important dynamic processes in the eart ...
Thrust-top basin formation along a suture
... ian to early Maastrichtian timing of this possible marine influence is within the range of the Bearpaw transgressive event of the Cordilleran foreland basin and allows for regional stratigraphic correlation of the Cantwell basin with other sedimentary basins in northwestern North America. (3) Struct ...
... ian to early Maastrichtian timing of this possible marine influence is within the range of the Bearpaw transgressive event of the Cordilleran foreland basin and allows for regional stratigraphic correlation of the Cantwell basin with other sedimentary basins in northwestern North America. (3) Struct ...
Continent–ocean transition and voluminous magmatic underplating
... Deep seismic refraction data were gathered across the entire East Greenland rifted margin north of the Jan Mayen Fracture Zone between 72◦ N and 75◦ N in 2003. Investigations of the deep crustal structure of this continental margin provide constraints on the formation of the margin and its structura ...
... Deep seismic refraction data were gathered across the entire East Greenland rifted margin north of the Jan Mayen Fracture Zone between 72◦ N and 75◦ N in 2003. Investigations of the deep crustal structure of this continental margin provide constraints on the formation of the margin and its structura ...
Melting Relations of MORB^Sediment Me
... water content (c. 2 wt %) of tonalite and granodiorite magmas produced by 50% melting. However, according to heat transfer models (Petford & Gallagher, 2001; Annen & Sparks, 2002), the heat provided by the intrusion of wet basalt at temperatures of 1100^12408C (Pichavant et al., 2002) in the lower c ...
... water content (c. 2 wt %) of tonalite and granodiorite magmas produced by 50% melting. However, according to heat transfer models (Petford & Gallagher, 2001; Annen & Sparks, 2002), the heat provided by the intrusion of wet basalt at temperatures of 1100^12408C (Pichavant et al., 2002) in the lower c ...
Crustal contributions to arc magmatism in the Andes of Central Chile
... and the Planehon and Antuco cones are basaltic components (51-53% SiOz) of eompositionally more variable compound edifices. Most centers are modest in volume (Table 1), by far the largest being the 95-kin 3 compound edifice that consists of Cerro Marmolejo and overlapping younger cones called Espiri ...
... and the Planehon and Antuco cones are basaltic components (51-53% SiOz) of eompositionally more variable compound edifices. Most centers are modest in volume (Table 1), by far the largest being the 95-kin 3 compound edifice that consists of Cerro Marmolejo and overlapping younger cones called Espiri ...
1 Imaging the transition from flat to normal subduction: Variations in
... km depth based on the offset between the slab anomaly north of the ridge and the location of the ...
... km depth based on the offset between the slab anomaly north of the ridge and the location of the ...
Late Mesozoic – Early Cenozoic structural evolution of - UiO
... north, there are few signs of Cretaceous extensional deformation, but magmatism of Barremian-Aptian age is widespread within an Arctic large igneous province (LIP) (Grogan et al., 1998; Maher, 2001). Regional uplift in the north gave rise to southward sediment progradation in the Barents Sea. By mid ...
... north, there are few signs of Cretaceous extensional deformation, but magmatism of Barremian-Aptian age is widespread within an Arctic large igneous province (LIP) (Grogan et al., 1998; Maher, 2001). Regional uplift in the north gave rise to southward sediment progradation in the Barents Sea. By mid ...
The role of hydrous phases in the formation of trench parallel
... Karato, 2001; Faccenda et al., 2008; Long and Silver, 2008; Healy et al., 2009; Katayama et al., 2009; Nikulin et al., 2009; Jung, 2011]. These explanations can roughly be divided into two categories. The models in the first category invoke some form of CPO in asthenospheric olivine. For example, the ...
... Karato, 2001; Faccenda et al., 2008; Long and Silver, 2008; Healy et al., 2009; Katayama et al., 2009; Nikulin et al., 2009; Jung, 2011]. These explanations can roughly be divided into two categories. The models in the first category invoke some form of CPO in asthenospheric olivine. For example, the ...
Depth distribution of Moho and tectonic framework in eastern Asian
... Islands, the Japan Sea, the Japan Islands, the Korea Peninsula, the Yellow Sea, the East China Sea, Ryukyu-gunto Islands, the Taiwan Island, the Philippine Sea Basin, the South China Sea and the Philippine Islands. The range of crustal thickness is 2834 km at the Sakhalin Island and the Okhotsk Sea ...
... Islands, the Japan Sea, the Japan Islands, the Korea Peninsula, the Yellow Sea, the East China Sea, Ryukyu-gunto Islands, the Taiwan Island, the Philippine Sea Basin, the South China Sea and the Philippine Islands. The range of crustal thickness is 2834 km at the Sakhalin Island and the Okhotsk Sea ...
Continental geotherm and the evolution of rifted margins
... produces the thick sequences of igneous rocks found at volcanic rifted margins (White and McKenzie, 1989; Bown and White, 1995; Hopper et al., 2003). Lowering the Tp of the sublithospheric mantle to below 1300 8C similarly leads to a decrease in the amount of melt generated at effectively infinite s ...
... produces the thick sequences of igneous rocks found at volcanic rifted margins (White and McKenzie, 1989; Bown and White, 1995; Hopper et al., 2003). Lowering the Tp of the sublithospheric mantle to below 1300 8C similarly leads to a decrease in the amount of melt generated at effectively infinite s ...