Geological Society of Malaysia Bulletin 49
... continental margin of southern China, presently occupied by the Reed Bank and Dangerous Grounds carbonate platform (Fig. 1). The opening of the South China Basin during the Oligocene-Middle Miocene (Taylor & Hayes, 1983; Briais et al., 1993) has had a profound impact on the geology of NW Sabah. Sout ...
... continental margin of southern China, presently occupied by the Reed Bank and Dangerous Grounds carbonate platform (Fig. 1). The opening of the South China Basin during the Oligocene-Middle Miocene (Taylor & Hayes, 1983; Briais et al., 1993) has had a profound impact on the geology of NW Sabah. Sout ...
Document
... seal, favoring hydrocarbon exploration & exploitation Geometries of hydrocarbon prone carbonate/evaporite successions are determined by position of base level change Evidence comes from plate motion cycles of Arabian Gulf, Central Asia, Atlantic, Cordilleran & Appalachian Mountains Kendall, Weber & ...
... seal, favoring hydrocarbon exploration & exploitation Geometries of hydrocarbon prone carbonate/evaporite successions are determined by position of base level change Evidence comes from plate motion cycles of Arabian Gulf, Central Asia, Atlantic, Cordilleran & Appalachian Mountains Kendall, Weber & ...
PDF 51 - The Open University
... Mesozoic Era, about 200 Ma ago, and that the continents then slowly drifted into their current positions. 1920-1960 A range of geophysical arguments was used to contest Wegener's theory. Most importantly, the lack of a mechanism strong enough to 'drive continents across the ocean basins' seriously u ...
... Mesozoic Era, about 200 Ma ago, and that the continents then slowly drifted into their current positions. 1920-1960 A range of geophysical arguments was used to contest Wegener's theory. Most importantly, the lack of a mechanism strong enough to 'drive continents across the ocean basins' seriously u ...
The Imbert Formation of northern Hispaniola: a tectono
... In the Cordillera Septentrional (Fig. 1), remnants of a Cenozoic pre- to syn-collision forearc sedimentary basin developed over the orogenic prism are constituted by the Imbert Formation (Fm) and the > 5 km thick overlying turbiditic sequence of the El Mamey Group (de Zoeten and Mann, 1991). Unlike ...
... In the Cordillera Septentrional (Fig. 1), remnants of a Cenozoic pre- to syn-collision forearc sedimentary basin developed over the orogenic prism are constituted by the Imbert Formation (Fm) and the > 5 km thick overlying turbiditic sequence of the El Mamey Group (de Zoeten and Mann, 1991). Unlike ...
Late Cenozoic evolution of the eastern margin of the Tibetan
... [4] Rather than envisioning plateau uplift as a spatially and temporally uniform event, a second class of models holds that the plateau grew in lateral extent (primarily to the east) with continuing convergence between India and Eurasia [England and Houseman, 1986, 1988; Royden, 1996]. The deformati ...
... [4] Rather than envisioning plateau uplift as a spatially and temporally uniform event, a second class of models holds that the plateau grew in lateral extent (primarily to the east) with continuing convergence between India and Eurasia [England and Houseman, 1986, 1988; Royden, 1996]. The deformati ...
Geology
... Showa-machi 3173-25, Kanazawa-ku, Yokohama, Japan Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, Natsushima 2-15, Yokosuka, Japan ...
... Showa-machi 3173-25, Kanazawa-ku, Yokohama, Japan Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, Natsushima 2-15, Yokosuka, Japan ...
pre-quaternary faults in iran
... the fault and in the southern part, the thickest development of the Zagros sediment is found, together with a flyschlike facies in the youngest Mesozoicand older Tertiary. These, as well as coloured m61angeof the Upper Cretaceous, indicate a markedunrest not otherwise present in the Zagros range. A ...
... the fault and in the southern part, the thickest development of the Zagros sediment is found, together with a flyschlike facies in the youngest Mesozoicand older Tertiary. These, as well as coloured m61angeof the Upper Cretaceous, indicate a markedunrest not otherwise present in the Zagros range. A ...
Genesis of the Neogene to Quaternary volcanism in the Carpathian
... thermal subsidence, when several thousands of meters of late Miocene to Quaternary sediments filled parts of the basin areas. At the northern boundary of the region, “soft” collision (Sperner et al., 2002) of the North Pannonian block with the European continent occurred during the Badenian (ca. 13– ...
... thermal subsidence, when several thousands of meters of late Miocene to Quaternary sediments filled parts of the basin areas. At the northern boundary of the region, “soft” collision (Sperner et al., 2002) of the North Pannonian block with the European continent occurred during the Badenian (ca. 13– ...
imp prefaz.qxp - Istituto Nazionale di Oceanografia e di Geofisica
... beneath the Adriatic-Padan crust while, along the Perityrrhenian region, the subduction is inverted, the Adriatic crust being subducted beneath the Tyrrhenian. Along the peninsula the edge of the over-thrusting Moho clearly shows four regions, separated by crustal breaks, respectively corresponding ...
... beneath the Adriatic-Padan crust while, along the Perityrrhenian region, the subduction is inverted, the Adriatic crust being subducted beneath the Tyrrhenian. Along the peninsula the edge of the over-thrusting Moho clearly shows four regions, separated by crustal breaks, respectively corresponding ...
101 Questions and Answers Concerning
... basaltic in composition, that this basalt had been generated at a mid-ocean ridge via partial melting of mantle rock below as part of the seafloor spreading process, and that all of crustal basement rocks of today’s ocean floor were no older than Mesozoic in age. Among the implications were that the ...
... basaltic in composition, that this basalt had been generated at a mid-ocean ridge via partial melting of mantle rock below as part of the seafloor spreading process, and that all of crustal basement rocks of today’s ocean floor were no older than Mesozoic in age. Among the implications were that the ...
Contribution of multibeam bathymetry to understanding
... topography occupies the ridge-transform intersection. This broad high is curved toward the active transform and extends from the ridge axis onto the older plate (e.g., Fig. 4). It is interpreted to form as excess volcanism at the ridge axis extends across the ridge-transform intersection onto the ol ...
... topography occupies the ridge-transform intersection. This broad high is curved toward the active transform and extends from the ridge axis onto the older plate (e.g., Fig. 4). It is interpreted to form as excess volcanism at the ridge axis extends across the ridge-transform intersection onto the ol ...
Iceland is cool: An origin for the Iceland volcanic province in the
... ridges, though retention of melt in the uppermost mantle may render it a slight underestimate (Cannat, 1996). In the case of the Icelandic crust, an additional complexity is the mismatch between the density contrast expected between oceanic lower crust and mantle (~ 300 kg/m3, assuming an olivine ga ...
... ridges, though retention of melt in the uppermost mantle may render it a slight underestimate (Cannat, 1996). In the case of the Icelandic crust, an additional complexity is the mismatch between the density contrast expected between oceanic lower crust and mantle (~ 300 kg/m3, assuming an olivine ga ...
Extrapolating Oceanic Age Distributions
... the half-rotations needed to fit one isochron to younger or older adjacent isochrons on the same plate, together with the assumption of symmetric spreading, to estimate the full rotation of the subducted plate to the preserved plate. Stock and Molnar (1988), who refer to these rotations as “halfangl ...
... the half-rotations needed to fit one isochron to younger or older adjacent isochrons on the same plate, together with the assumption of symmetric spreading, to estimate the full rotation of the subducted plate to the preserved plate. Stock and Molnar (1988), who refer to these rotations as “halfangl ...
Neogene-Recent rifting and volcanism in northern Tanzania
... 1. In its tectonic position astride a craton/fold-belt boundary, the N. Tanzania volcanic province has closer analogies to Gardar than does Kenya. Like Gardar, the N. Tanzania igneous centres are scattered across a broad area of tectonic disturbance, unlike the relatively-narrow linear zone of rifti ...
... 1. In its tectonic position astride a craton/fold-belt boundary, the N. Tanzania volcanic province has closer analogies to Gardar than does Kenya. Like Gardar, the N. Tanzania igneous centres are scattered across a broad area of tectonic disturbance, unlike the relatively-narrow linear zone of rifti ...
The ocean-continent transition in the uniform lithospheric stretching
... indeed measured on the deeper portion of the Armorican continental margin and that consequently the mode1 could be accepted at least as a fint approximation. The reason why the transition from continental lithosphere stretching to oceanic accretion should occur for a given stretching factor /3 was, ...
... indeed measured on the deeper portion of the Armorican continental margin and that consequently the mode1 could be accepted at least as a fint approximation. The reason why the transition from continental lithosphere stretching to oceanic accretion should occur for a given stretching factor /3 was, ...
Roberts et al., 2013, Basin Modeling
... about the partitioning of extension through the crust, which ultimately impacts upon the predictions of the top basement heat-flow model (Kusznir et al. 2005). •• forward modelling the kinematics of break-up. Finally we aim to bring together the complete rifting/break-up process within a single forw ...
... about the partitioning of extension through the crust, which ultimately impacts upon the predictions of the top basement heat-flow model (Kusznir et al. 2005). •• forward modelling the kinematics of break-up. Finally we aim to bring together the complete rifting/break-up process within a single forw ...
Thermal and petrophysical characterization of the lithospheric
... In the Valencia Trough Basin extension lasted from Late Oligocene to Langhian period, whereas the opening of the Algerian Basin began later (latest Early Miocene–Middle Miocene) and ended during the Tortonian when remnants of the southern Iberia continental margin (the Kabylies) accreted with the Af ...
... In the Valencia Trough Basin extension lasted from Late Oligocene to Langhian period, whereas the opening of the Algerian Basin began later (latest Early Miocene–Middle Miocene) and ended during the Tortonian when remnants of the southern Iberia continental margin (the Kabylies) accreted with the Af ...
Mechanism and timing of Pb transport from subducted oceanic crust
... from the basaltic crust of the subducting Louisville Seamount Chain. The dominant source of mantle Pb in arc lavas (at least in northern Tonga), is therefore subducted basaltic oceanic crust, rather than the overlying mantle wedge. The orientation of the Pb isotope arrays constrain the relative timi ...
... from the basaltic crust of the subducting Louisville Seamount Chain. The dominant source of mantle Pb in arc lavas (at least in northern Tonga), is therefore subducted basaltic oceanic crust, rather than the overlying mantle wedge. The orientation of the Pb isotope arrays constrain the relative timi ...
Lecture 47
... • Seismic velocity and heat flow indicate that the continental crust is compositionally stratified, with the lower part being distinctly denser and more mafic – richer in Mg and Fe and poorer in SiO2 and incompatible elements, including the heat producers K, U, and Th. • We can divide the problem of ...
... • Seismic velocity and heat flow indicate that the continental crust is compositionally stratified, with the lower part being distinctly denser and more mafic – richer in Mg and Fe and poorer in SiO2 and incompatible elements, including the heat producers K, U, and Th. • We can divide the problem of ...
Revised Tectonic Evolution of the Eastern Indian Ocean
... Plateau/Broken Ridge or between Tasmania and Antarctica (Figure 1). Some models result in tectonically improbable and geologically unsupported episodic extension and compression between Broken Ridge and the Kerguelen Plateau (e.g. Whittaker et al., 2007, Supplementary Figure 1a and 5). Others result ...
... Plateau/Broken Ridge or between Tasmania and Antarctica (Figure 1). Some models result in tectonically improbable and geologically unsupported episodic extension and compression between Broken Ridge and the Kerguelen Plateau (e.g. Whittaker et al., 2007, Supplementary Figure 1a and 5). Others result ...
Tracing the evolving flux from the subducting plate in the Tonga
... variations in this flux should have a major effect on arc geochemistry. Hole et al. (1984), and more recently Plank and Langmuir (1993) and Johnson and Plank (1999), suggested that the REE characteristics of many arc lavas are derived from the sediments being subducted in the adjacent trench. In the ...
... variations in this flux should have a major effect on arc geochemistry. Hole et al. (1984), and more recently Plank and Langmuir (1993) and Johnson and Plank (1999), suggested that the REE characteristics of many arc lavas are derived from the sediments being subducted in the adjacent trench. In the ...
petrology of subducted slabs - School of Ocean and Earth Science
... layer of depleted peridotites. However, modern ocean floors and ophiolites reveal large structural and chemical heterogeneities in the form of layers and pods that are expected to be maintained even under extreme strain rates if their dimension is in the order of tens of meters or higher. This is vi ...
... layer of depleted peridotites. However, modern ocean floors and ophiolites reveal large structural and chemical heterogeneities in the form of layers and pods that are expected to be maintained even under extreme strain rates if their dimension is in the order of tens of meters or higher. This is vi ...
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 ...
The Periadriatic lineament and the role of strike slip - RWTH
... The western part of the PL is explained by a retrotranslation thesis from Laubscher. Laubscher firms up his model of earlier analysis from Argand. The new model uses a step-by-step retrodeformation of the western Alps; it starts with the latest movement and goes to the oldest motions: The youngest p ...
... The western part of the PL is explained by a retrotranslation thesis from Laubscher. Laubscher firms up his model of earlier analysis from Argand. The new model uses a step-by-step retrodeformation of the western Alps; it starts with the latest movement and goes to the oldest motions: The youngest p ...
THE SIGNIFICANCE OF THE METAMORPHIC ROCKS OF TIMOR
... rocks form the earliest unit, perhaps representing fragments of an ancient Precambrian continental shield. This would imply that the greenschist facies volcano-sedimentary sequence accreted to these older continental rocks during Late Precambrian or Palaeozoic time. Two alternative hypotheses can be ...
... rocks form the earliest unit, perhaps representing fragments of an ancient Precambrian continental shield. This would imply that the greenschist facies volcano-sedimentary sequence accreted to these older continental rocks during Late Precambrian or Palaeozoic time. Two alternative hypotheses can be ...