seamount subduction and earthquakes
... however, that many arc-trench systems were highly segmented with regard to their seismicity. Some segments were active on historical time scales, while others were not (so-called “seismic gap”). Because the seafloor varies spatially in roughness, Kelleher and McCann (1976) suggested that there might ...
... however, that many arc-trench systems were highly segmented with regard to their seismicity. Some segments were active on historical time scales, while others were not (so-called “seismic gap”). Because the seafloor varies spatially in roughness, Kelleher and McCann (1976) suggested that there might ...
Journal of the Geological Society of London, 162, 2005, 299
... Danian sediments onshore that record the details of the midPalaeocene uplift and subsidence. This can be most easily explained if erosion in the present offshore region during the Palaeocene episode of uplift (impact of the Iceland plume) was so extensive that it removed all traces of any Maastricht ...
... Danian sediments onshore that record the details of the midPalaeocene uplift and subsidence. This can be most easily explained if erosion in the present offshore region during the Palaeocene episode of uplift (impact of the Iceland plume) was so extensive that it removed all traces of any Maastricht ...
Mantle flow through the Northern Cordilleran slab window revealed
... Approximately one-third of the present-day American Cordillera, from eastern Alaska to the Antarctic Peninsula, is underlain by slab windows (Fig. 1), all of which have contributed to variations in igneous and tectonic conditions in the continental margin. Two of the intersections occurred beneath N ...
... Approximately one-third of the present-day American Cordillera, from eastern Alaska to the Antarctic Peninsula, is underlain by slab windows (Fig. 1), all of which have contributed to variations in igneous and tectonic conditions in the continental margin. Two of the intersections occurred beneath N ...
Ocean Drilling Program Initial Reports Volume 160
... North African plate to the south, perhaps as a marginal crustal fragment. The nature of the basement of the Eratosthenes Seamount is unknown, but it might represent transitional continental crust, intruded by mafic igneous rocks, in view of the strong magnetic anomaly beneath the seamount and adjace ...
... North African plate to the south, perhaps as a marginal crustal fragment. The nature of the basement of the Eratosthenes Seamount is unknown, but it might represent transitional continental crust, intruded by mafic igneous rocks, in view of the strong magnetic anomaly beneath the seamount and adjace ...
The Making of the Japan Sea and the Japanese Mountains
... self-contained phenomenon but related to distant events and to other occurrences of back-arc basin opening.8 Among current competing hypotheses, one sees the Japan Sea back-arc basin formed as a repercussion of the distant collision of India into Eurasia; the other attributes it to the far earlier b ...
... self-contained phenomenon but related to distant events and to other occurrences of back-arc basin opening.8 Among current competing hypotheses, one sees the Japan Sea back-arc basin formed as a repercussion of the distant collision of India into Eurasia; the other attributes it to the far earlier b ...
The Periadriatic lineament and the role of strike slip - RWTH
... southwestern part lies the only segment in the Miocene, which separates the preOligocene Alps from the early Apennine. The third phase is the Oligocene and early Miocene phase (Fig.8). It’s also called the Insubric-Helvetic phase. This phase is dextrally transpressive at the northern boundary of th ...
... southwestern part lies the only segment in the Miocene, which separates the preOligocene Alps from the early Apennine. The third phase is the Oligocene and early Miocene phase (Fig.8). It’s also called the Insubric-Helvetic phase. This phase is dextrally transpressive at the northern boundary of th ...
Thermal and metamorphic environment of subduction zone episodic
... 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 inconsistent with fore-arc heat flow observations [e.g., Wiens et al., 2008]. [10] A steady state thermal model of ...
... 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 inconsistent with fore-arc heat flow observations [e.g., Wiens et al., 2008]. [10] A steady state thermal model of ...
thrust systems - The Web site cannot be found
... thrust belts and related analogue and numerical modelling have revealed several recurrent characteristics that have led to the development of empirical, but not absolute rules regarding thrust geometry and growth. These few basic rules are valid only if the thrust area was not deformed (i.e. folded) ...
... thrust belts and related analogue and numerical modelling have revealed several recurrent characteristics that have led to the development of empirical, but not absolute rules regarding thrust geometry and growth. These few basic rules are valid only if the thrust area was not deformed (i.e. folded) ...
PDF
... two enigmas: (1) Why was the GoM opening pole (79–84°W, 23–30°N) so different from that of the central Atlantic (15–18°W, 65–67°N)? and (2) Why was the GoM opening so short-lived (ca. 165–142 Ma), when there was no collision or other obvious reason for seafloor spreading to stop? The GoM BAB hypothe ...
... two enigmas: (1) Why was the GoM opening pole (79–84°W, 23–30°N) so different from that of the central Atlantic (15–18°W, 65–67°N)? and (2) Why was the GoM opening so short-lived (ca. 165–142 Ma), when there was no collision or other obvious reason for seafloor spreading to stop? The GoM BAB hypothe ...
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 ...
Plate motions, Andean orogeny, and volcanism above the
... closer to ~3 1012 N m-1 (Parsons and Richter, 1980; Richardson, 1992). Ridge push therefore at most amounts to only half the force needed to support the growing Andean belt. The remaining source (~4 1012 N m-1) must therefore arise from active basal drag beneath the South American plate. ...
... closer to ~3 1012 N m-1 (Parsons and Richter, 1980; Richardson, 1992). Ridge push therefore at most amounts to only half the force needed to support the growing Andean belt. The remaining source (~4 1012 N m-1) must therefore arise from active basal drag beneath the South American plate. ...
The Great Basin Altiplano during the middle
... (1997) model states that the crust thinning was from 70 to 50 km by extensional unroofing between the Cretaceous and Eocene–Oligocene, whereas Constenius (1996) concluded that extensional basins formed from the middle Eocene to early Miocene. However, on the basis of his study of interbedded ash-flo ...
... (1997) model states that the crust thinning was from 70 to 50 km by extensional unroofing between the Cretaceous and Eocene–Oligocene, whereas Constenius (1996) concluded that extensional basins formed from the middle Eocene to early Miocene. However, on the basis of his study of interbedded ash-flo ...
Review of Late Jurassic-early Miocene sedimentation and plate
... westward relative migration of the Klamath Mountains province, and U–Pb ages of deposition, sediment sources, and spatial locations of Jurassic and younger, detrital zirconbearing clastic rocks constrain geologic development of the northern California continental edge as follows: (1) At *175 Ma, tra ...
... westward relative migration of the Klamath Mountains province, and U–Pb ages of deposition, sediment sources, and spatial locations of Jurassic and younger, detrital zirconbearing clastic rocks constrain geologic development of the northern California continental edge as follows: (1) At *175 Ma, tra ...
Slab pull, mantle convection, and Pangaean assembly and dispersal
... produce the present-day circum-Paci¢c orogenic belts. Convergent margin activity has probably occurred since the Early Palaeozoic, as observed in the North American Cordillera [15], the South American Pre-cordillera [16], the Tasmanides of eastern Australia [17], the eastern Altaids of northern Chin ...
... produce the present-day circum-Paci¢c orogenic belts. Convergent margin activity has probably occurred since the Early Palaeozoic, as observed in the North American Cordillera [15], the South American Pre-cordillera [16], the Tasmanides of eastern Australia [17], the eastern Altaids of northern Chin ...
Lower plate deformation at the Chile Triple Junction from the
... 4. Structure of the Ocean Floor in the CTJ Region 4.1. Bathymetry of the SCR North of the CTJ The SCR offshore southern Chile consists of spreading segments trending ~N160°, separated by a series of parallel fracture zones, from north to south: the Guamblin, Darwin, Taitao, and Tres Montes FZs (Figu ...
... 4. Structure of the Ocean Floor in the CTJ Region 4.1. Bathymetry of the SCR North of the CTJ The SCR offshore southern Chile consists of spreading segments trending ~N160°, separated by a series of parallel fracture zones, from north to south: the Guamblin, Darwin, Taitao, and Tres Montes FZs (Figu ...
Evolution of the Tyrrhenian Sea-Calabrian Arc system: The past and
... Just before the Tyrrhenian opening, the orogenic belt in Fig. 1 had on its eastern edge an accretionary wedge that formed during the subduction of African oceanic lithosphere up to the Tortonian and that was contained the internal units of the Apennines (ARGNANI, 2005). During the Tyrrhenian opening ...
... Just before the Tyrrhenian opening, the orogenic belt in Fig. 1 had on its eastern edge an accretionary wedge that formed during the subduction of African oceanic lithosphere up to the Tortonian and that was contained the internal units of the Apennines (ARGNANI, 2005). During the Tyrrhenian opening ...
Origin and consequences of western Mediterranean subduction
... University of Oslo, Oslo, Norway ...
... University of Oslo, Oslo, Norway ...
eastern european alpine system and the carpathian
... of the continental fragments indicate they were considerably larger than their present size and had different shapes. Convergence of continental fragments began in the Late Jurassic by subduction of oceanic crust, but upon complete disappearance of oceanic crust, convergence continued with subductio ...
... of the continental fragments indicate they were considerably larger than their present size and had different shapes. Convergence of continental fragments began in the Late Jurassic by subduction of oceanic crust, but upon complete disappearance of oceanic crust, convergence continued with subductio ...
The Basin and Range Province: Origin and Tectonic Significance
... possible exceptionof the northern part of the East African rift system, it is unusual amongthe regions of any continent for high heat flow, thin lithosphere, the occurrence of low seismic velocities in the underlying upper mantle, a history of long-lived episodic magmatism,and a pronouncedlayer of l ...
... possible exceptionof the northern part of the East African rift system, it is unusual amongthe regions of any continent for high heat flow, thin lithosphere, the occurrence of low seismic velocities in the underlying upper mantle, a history of long-lived episodic magmatism,and a pronouncedlayer of l ...
Southeast Asia`s changing palaeogeography
... and formed one of the most important barriers at its edge, the Makassar Straits. Australia began to collide with Southeast Asia about 25 million years ago, effectively closing the former deep ocean separating the two continents, and forming the region now known as Wallacea. Collision, volcanism, and ...
... and formed one of the most important barriers at its edge, the Makassar Straits. Australia began to collide with Southeast Asia about 25 million years ago, effectively closing the former deep ocean separating the two continents, and forming the region now known as Wallacea. Collision, volcanism, and ...
The role of crustal heterogeneity in controlling vertical coupling
... The rock sequences recording the time interval between Maastrichtian and Late Eocene in the study area consist mainly of continental sedimentary deposits and minor volcanic rocks (e.g. Tetelcingo, Balsas, Oapan and other locally named formations) that fill basins bounded by north–south folds and thr ...
... The rock sequences recording the time interval between Maastrichtian and Late Eocene in the study area consist mainly of continental sedimentary deposits and minor volcanic rocks (e.g. Tetelcingo, Balsas, Oapan and other locally named formations) that fill basins bounded by north–south folds and thr ...
Seafloor spreading around Australia R. Dietmar Müller, Carmen
... of it), and the Louisiade Plateau Gaina et al. . This extensional regime lasted until a major plate reorganisation at C26 (57.9 Ma). Relative motion between the Australian Plate and Kenn Plateau-Mellish Rise and between the Mellish Rise and the Louisiade Plateau changed from extension to strike-slip ...
... of it), and the Louisiade Plateau Gaina et al. . This extensional regime lasted until a major plate reorganisation at C26 (57.9 Ma). Relative motion between the Australian Plate and Kenn Plateau-Mellish Rise and between the Mellish Rise and the Louisiade Plateau changed from extension to strike-slip ...
An Overview of the Structure and Evolution of the Ouachita Orogenic
... wide variety of data to produce a set of crustal scale transects from the continental interior to the Gulf Coast region. The key transect is based on deep reflection and refraction experiments that together extended from the Arkoma basin in Arkansas to the Sabine uplift in Louisiana. These data imag ...
... wide variety of data to produce a set of crustal scale transects from the continental interior to the Gulf Coast region. The key transect is based on deep reflection and refraction experiments that together extended from the Arkoma basin in Arkansas to the Sabine uplift in Louisiana. These data imag ...
The geology and geodynamics of the
... geodynamic evolution of the Northumberland Trough Region. In particular, to provide insights into the importance of deep processes, such as depth-dependent extension, and how they interact with basin-controlling processes such as sedimentary infill. The Northumberland Trough Region includes the Nort ...
... geodynamic evolution of the Northumberland Trough Region. In particular, to provide insights into the importance of deep processes, such as depth-dependent extension, and how they interact with basin-controlling processes such as sedimentary infill. The Northumberland Trough Region includes the Nort ...
Convergence and Collision
... 1960s, geologists really didn’t know. But plate tectonics theory provides a ready explanation—the Andes Mountains formed where the Pacific Ocean floor ...
... 1960s, geologists really didn’t know. But plate tectonics theory provides a ready explanation—the Andes Mountains formed where the Pacific Ocean floor ...