![Evolution of the southeastern Lachlan Fold Belt in Victoria](http://s1.studyres.com/store/data/000727045_1-f4a19254f59ba15fb51e46991fd2e7aa-300x300.png)
Evolution of the southeastern Lachlan Fold Belt in Victoria
... sequences. Strike-slip and thrust faults form complex linked systems that show kinematic indicators consistent with overall southward tectonic transport. A large transform fault is inferred to have accommodated approximately 600 km of dextral strike-slip displacement between the Whitelaw and Benambr ...
... sequences. Strike-slip and thrust faults form complex linked systems that show kinematic indicators consistent with overall southward tectonic transport. A large transform fault is inferred to have accommodated approximately 600 km of dextral strike-slip displacement between the Whitelaw and Benambr ...
Ocean Drilling Program Initial Reports Volume 160
... The Eratosthenes Seamount plays a critical role in the tectonic evolution of the Eastern Mediterranean, including the uplift of the Troodos ophiolite of Cyprus. It also represents an important early collisional stage in the general process of plate suturing and mountain building. Drilling during Oce ...
... The Eratosthenes Seamount plays a critical role in the tectonic evolution of the Eastern Mediterranean, including the uplift of the Troodos ophiolite of Cyprus. It also represents an important early collisional stage in the general process of plate suturing and mountain building. Drilling during Oce ...
Homework 5: Buoyancy Introduction The buoyancy of plates is a
... density. Allow the plate thickness to vary from 100-350 km, and crustal thickness from 15-60 km. This will allow you to determine the range of conditions under which continents can be subducted. 5. Is it possible to get continental lithosphere with normal crust (30 km thick) and normal plate thickne ...
... density. Allow the plate thickness to vary from 100-350 km, and crustal thickness from 15-60 km. This will allow you to determine the range of conditions under which continents can be subducted. 5. Is it possible to get continental lithosphere with normal crust (30 km thick) and normal plate thickne ...
Mantle temperature control on composition of arc magmas along the
... California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA ABSTRACT Abundant volcanism in the Central Kamchatka Depression (CKD) adjacent to the Kamchatka–Aleutian Arc junction occurs where the Pacific slab edge is subducting beneath Kamchatka. Here we summar ...
... California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA ABSTRACT Abundant volcanism in the Central Kamchatka Depression (CKD) adjacent to the Kamchatka–Aleutian Arc junction occurs where the Pacific slab edge is subducting beneath Kamchatka. Here we summar ...
Crustal structure of the southern margin of the African - ePIC
... [2] A number of features make southern Africa a key site for integrated geophysical and geological research on continental accretion and break-up. Bounded to the south by the Agulhas-Falkland Fracture Zone (AFFZ, Figure 1), this region represents one of the world’s best examples of a sheared contine ...
... [2] A number of features make southern Africa a key site for integrated geophysical and geological research on continental accretion and break-up. Bounded to the south by the Agulhas-Falkland Fracture Zone (AFFZ, Figure 1), this region represents one of the world’s best examples of a sheared contine ...
plate tectonics - School of Ocean and Earth Science and Technology
... was that geological change in the surrounding oceans was difficult to study because it occurred in an underwater environment. Over time, however, an accumulation of depth-sounding data from across the world’s oceans allowed scientists to finally map the broad features of the seafloor. In the 1940s t ...
... was that geological change in the surrounding oceans was difficult to study because it occurred in an underwater environment. Over time, however, an accumulation of depth-sounding data from across the world’s oceans allowed scientists to finally map the broad features of the seafloor. In the 1940s t ...
C2.3 Plate boundary earthquakes C2.3.1 Strike
... • Range of subduction angles (Fowler 9.46). Note that line of volcanoes (volcanic arc) occurs where the subducting plate reaches depth of ~ 100km. • Water released from the slab melts the overlying mantle. • Slab melting is relatively rare and forms adakites. • Subduction angle can vary along strike ...
... • Range of subduction angles (Fowler 9.46). Note that line of volcanoes (volcanic arc) occurs where the subducting plate reaches depth of ~ 100km. • Water released from the slab melts the overlying mantle. • Slab melting is relatively rare and forms adakites. • Subduction angle can vary along strike ...
Thermal and metamorphic environment of subduction zone episodic
... truncated at the tip of the mantle wedge to satisfy surface heat flow measurements. Note that the choice of mantle rheology does not significantly affect the temperatures calculated for the shallow fore arc, unless flow in the mantle wedge corner were to extend updip to depths <50 km, which would be ...
... truncated at the tip of the mantle wedge to satisfy surface heat flow measurements. Note that the choice of mantle rheology does not significantly affect the temperatures calculated for the shallow fore arc, unless flow in the mantle wedge corner were to extend updip to depths <50 km, which would be ...
SEA LEVEL VARIATIONS OVER GEOLOGIC TIME
... in the PaciRc Ocean between about 120 and 115 Ma (Figure 1D). Over that interval it may have generated a sea level rise of around 50 m. In summary, over the last 200 million years, long-term sea level change (Figure 1D) can be largely attributed to tectonics. Continental crust expanded by extension ...
... in the PaciRc Ocean between about 120 and 115 Ma (Figure 1D). Over that interval it may have generated a sea level rise of around 50 m. In summary, over the last 200 million years, long-term sea level change (Figure 1D) can be largely attributed to tectonics. Continental crust expanded by extension ...
Seismological observations in Northwestern South America
... The cause of tectonic deformation in northwestern South America and its link to upper mantle structure and flow are debated. We use a combination of broadband and short period travel time seismic data for P-waves to show that observations are consistent with the presence of two subduction segments in ...
... The cause of tectonic deformation in northwestern South America and its link to upper mantle structure and flow are debated. We use a combination of broadband and short period travel time seismic data for P-waves to show that observations are consistent with the presence of two subduction segments in ...
Mineralogy, geochemistry and geotectonic of plagiogranites from
... composed of plutonic and volcanic rocks of the Oligo-Miocene age. Central Iran is a complex zone of many rock types from Precambrian to present. All these zones were formed by the opening and closing of the Paleo- and Neo-Tethys oceanic ...
... composed of plutonic and volcanic rocks of the Oligo-Miocene age. Central Iran is a complex zone of many rock types from Precambrian to present. All these zones were formed by the opening and closing of the Paleo- and Neo-Tethys oceanic ...
Oblique rifting of the Equatorial Atlantic
... Rifting between large continental plates results in either continental breakup and the formation of conjugate passive margins, or rift abandonment and a set of aborted rift basins. The nonlinear interaction between key parameters such as plate boundary configuration, lithospheric architecture, and e ...
... Rifting between large continental plates results in either continental breakup and the formation of conjugate passive margins, or rift abandonment and a set of aborted rift basins. The nonlinear interaction between key parameters such as plate boundary configuration, lithospheric architecture, and e ...
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... serpentinized mantle that is unroofed prior to oceanization and seafloor spreading. The Iberian margin is the most well known example of this (e.g. (Perez-Gussinye and Reston, 2001)). Another reason is that lower crustal bodies imaged frequently beneath volcanic passive margins might also be partial ...
... serpentinized mantle that is unroofed prior to oceanization and seafloor spreading. The Iberian margin is the most well known example of this (e.g. (Perez-Gussinye and Reston, 2001)). Another reason is that lower crustal bodies imaged frequently beneath volcanic passive margins might also be partial ...
Slab behaviour and its surface expression: new insights
... oceanic crust at greater depths. Eclogitisation is, amongst other things, controlled by temperature and is thus dependent on the subduction velocity. For the sake of simplicity, in our models we neglect the influence of subduction velocity and we assume that the oceanic crust undergoes eclogitisatio ...
... oceanic crust at greater depths. Eclogitisation is, amongst other things, controlled by temperature and is thus dependent on the subduction velocity. For the sake of simplicity, in our models we neglect the influence of subduction velocity and we assume that the oceanic crust undergoes eclogitisatio ...
A narrowly spaced double-seismic zone in the subducting Nazca plate
... Yamanaka, 1996], and/or the cooling history of the oceanic plate [Wang, 2002]. This water is subsequently released during subduction by dehydration of hydrous minerals, which can lead to high pore pressures and reduction of effective normal stress, and hence promote faulting by dehydration embrittle ...
... Yamanaka, 1996], and/or the cooling history of the oceanic plate [Wang, 2002]. This water is subsequently released during subduction by dehydration of hydrous minerals, which can lead to high pore pressures and reduction of effective normal stress, and hence promote faulting by dehydration embrittle ...
pdf - Geological Society of Malaysia
... of an older series of continental deposits such as the Murau and Redang conglomerates. The pan-peninsula late Triassic orogenic event uplifted the Eastern Belt. This was followed by deposition of a younger series of continental deposits which are only gently dipping and probably they were uplifted i ...
... of an older series of continental deposits such as the Murau and Redang conglomerates. The pan-peninsula late Triassic orogenic event uplifted the Eastern Belt. This was followed by deposition of a younger series of continental deposits which are only gently dipping and probably they were uplifted i ...
The structure and dynamics of the mantle wedge
... weak to deform under the applied force. The type of deformation that takes place is strongly dependent on temperature, pressure, applied stress and composition. At the low temperatures near the Earth’s surface most silicate rock deforms in a brittle fashion leading to faulting and earthquakes. At hi ...
... weak to deform under the applied force. The type of deformation that takes place is strongly dependent on temperature, pressure, applied stress and composition. At the low temperatures near the Earth’s surface most silicate rock deforms in a brittle fashion leading to faulting and earthquakes. At hi ...
Hilliker 1 The Effects of the Farallon Plate Subduction Frank Hilliker
... Studying all of these effects and results enables a better understanding of how and why the New Madrid Seismic Zone functions the way it does and could help to plan contingencies for dealing with similar conditions which could occur in the future. Plate tectonics has been and will remain a constant ...
... Studying all of these effects and results enables a better understanding of how and why the New Madrid Seismic Zone functions the way it does and could help to plan contingencies for dealing with similar conditions which could occur in the future. Plate tectonics has been and will remain a constant ...
Impact of lower plate structure on upper plate
... cruise (Figures 4 and 5). One of the most prominent N-S lineaments, near 92.8°E, is over 50 km long and has vertical offset of 10-30 m towards the east on several 3.5 kHz profiles (Figure 4). Smaller graben-type features (typically 10 m in height) can be observed parallel to this major N-S scarp. Th ...
... cruise (Figures 4 and 5). One of the most prominent N-S lineaments, near 92.8°E, is over 50 km long and has vertical offset of 10-30 m towards the east on several 3.5 kHz profiles (Figure 4). Smaller graben-type features (typically 10 m in height) can be observed parallel to this major N-S scarp. Th ...
117. Lee, C. - Cin
... solar system with continents and ocean basins. The continents ride high, about four kilometres above the seafloor. They are composed of thick, silicic crust that is more buoyant than the thin, dense crust that floors the oceans. Oceanic crust is thin — only about 7 km on average — because the additi ...
... solar system with continents and ocean basins. The continents ride high, about four kilometres above the seafloor. They are composed of thick, silicic crust that is more buoyant than the thin, dense crust that floors the oceans. Oceanic crust is thin — only about 7 km on average — because the additi ...
Late-orogenic heating during exhumation: Alpine PTt trajectories
... Two fundamentally di¡erent candidate mechanisms were proposed to explain a stage of re-heating during the exhumation of high-pressure metamorphic rocks: (1) slab detachment [6, 7, see also 8, 9], and (2) the development of a wedge of tectonically accreted radiogenic material (TARM) above the subduct ...
... Two fundamentally di¡erent candidate mechanisms were proposed to explain a stage of re-heating during the exhumation of high-pressure metamorphic rocks: (1) slab detachment [6, 7, see also 8, 9], and (2) the development of a wedge of tectonically accreted radiogenic material (TARM) above the subduct ...
Thermal structure of the Costa Rica – Nicaragua subduction zone
... flux melting triggered by fluids derived from the subducted Cocos plate (Carr et al., 1990; Feigenson and Carr, 1993; Leeman et al., 1994; Walker et al., 1995). A number of geochemical studies have assessed the role of subducted material in generating arc lavas by comparing the concentration of flui ...
... flux melting triggered by fluids derived from the subducted Cocos plate (Carr et al., 1990; Feigenson and Carr, 1993; Leeman et al., 1994; Walker et al., 1995). A number of geochemical studies have assessed the role of subducted material in generating arc lavas by comparing the concentration of flui ...
PPT - Margins
... Fish Creek - Vallecito Basin (FCVB) Ongoing work with Mike Oskin, Tom Peryam, Kim Le: basin evolution and controls on progradation ...
... Fish Creek - Vallecito Basin (FCVB) Ongoing work with Mike Oskin, Tom Peryam, Kim Le: basin evolution and controls on progradation ...