Petrology Lecture 11
... univariant reactions in the CaO-MgO-Al2O3-SiO2-H2O-(Na2O) system (“C(N)MASH”). Winter (2010) An Introduction ...
... univariant reactions in the CaO-MgO-Al2O3-SiO2-H2O-(Na2O) system (“C(N)MASH”). Winter (2010) An Introduction ...
Crustal radial anisotropy across Eastern Tibet and the Western
... isotropic Vs are estimated. Each distribution is summarized with a mean and standard deviation, but is also used to identify “highly probable” structural attributes, which include (1) positive midcrustal radial anisotropy (Vsh > Vsv) across eastern Tibet (spatial average = 4.8% ± 1.4%) that terminat ...
... isotropic Vs are estimated. Each distribution is summarized with a mean and standard deviation, but is also used to identify “highly probable” structural attributes, which include (1) positive midcrustal radial anisotropy (Vsh > Vsv) across eastern Tibet (spatial average = 4.8% ± 1.4%) that terminat ...
Ringwood Phase transformations and their bearing on the
... boundary conditions for geochemical Earth models and place severe limitations upon hypotheses which invoke large-scale melting early in the Earth’s history. They also imply that the Mg/Si ratio of the Lower Mantle is similar to that of the Upper Mantle. The geochemical evolution and dynamical behavi ...
... boundary conditions for geochemical Earth models and place severe limitations upon hypotheses which invoke large-scale melting early in the Earth’s history. They also imply that the Mg/Si ratio of the Lower Mantle is similar to that of the Upper Mantle. The geochemical evolution and dynamical behavi ...
Thermal, Density, Seismological, and Rheological Structure of the
... code (LitMod) that solves simultaneously the heat transfer, thermodynamical, geopotential, isostasy, and rheological equations for a particular lithospheric structure with any given composition. LitMod has been applied to a number of synthetic and real transects in both oceanic and continental domai ...
... code (LitMod) that solves simultaneously the heat transfer, thermodynamical, geopotential, isostasy, and rheological equations for a particular lithospheric structure with any given composition. LitMod has been applied to a number of synthetic and real transects in both oceanic and continental domai ...
STP 3 & 4 2.5S.1 Basic Geologic and Seismic Information
... Orogeny that occurred during the Middle to Late Precambrian (Proterozoic) time, approximately one billion years ago (1000 mya) as a result of continent-to-continent impact along the edge of Laurentia, the ancestral North America. Some reconstructions show only the ancestral African continental mass ...
... Orogeny that occurred during the Middle to Late Precambrian (Proterozoic) time, approximately one billion years ago (1000 mya) as a result of continent-to-continent impact along the edge of Laurentia, the ancestral North America. Some reconstructions show only the ancestral African continental mass ...
nature and composition of the continental crust
... also found in surface outcrop or as xenoliths. Amphibolite facies rocks may also be important in the lowermost crust in areas of high water flux (such as in island arc settings where hydrous oceanic lithosphere is subducted and dewatered [e.g., Kushiro, 1990]. The role the lower crust plays in conti ...
... also found in surface outcrop or as xenoliths. Amphibolite facies rocks may also be important in the lowermost crust in areas of high water flux (such as in island arc settings where hydrous oceanic lithosphere is subducted and dewatered [e.g., Kushiro, 1990]. The role the lower crust plays in conti ...
Title Development of Surface-wave Methods and Its Application to
... Seismic exploration methods have played important role in Japanese civil engineering investigations for many years. For example, a P-wave refraction method is one of the most popular geotechnical investigation methods in Japan. The refraction method has been applied to most of tunnels in Japan in or ...
... Seismic exploration methods have played important role in Japanese civil engineering investigations for many years. For example, a P-wave refraction method is one of the most popular geotechnical investigation methods in Japan. The refraction method has been applied to most of tunnels in Japan in or ...
Geophysical-petrological model of the crust and upper mantle in the
... Greater Himalaya, and the Tethys Himalaya. These units are separated from each other by major crustal-scale thrusts, named, from south to north: (1) Main Frontal Thrust (MFT), carrying the Neogene molasses of the Siwalik units over the Indo-Gangetic plain; (2) Main Boundary Thrust (MBT), carrying th ...
... Greater Himalaya, and the Tethys Himalaya. These units are separated from each other by major crustal-scale thrusts, named, from south to north: (1) Main Frontal Thrust (MFT), carrying the Neogene molasses of the Siwalik units over the Indo-Gangetic plain; (2) Main Boundary Thrust (MBT), carrying th ...
The lithosphere and asthenosphere of the Iceland hotspot from
... Fjords, 29 ± 2 km. The thinnest parts of the crust lie in West Central Iceland, 19 ± 1 km, and in the West Volcanic (or Rift) Zone, 19[+6/−1] km. This study examined how thicker crust away from the rift zone can be fitted with dynamic crust formation models. Possible explanations for different thick ...
... Fjords, 29 ± 2 km. The thinnest parts of the crust lie in West Central Iceland, 19 ± 1 km, and in the West Volcanic (or Rift) Zone, 19[+6/−1] km. This study examined how thicker crust away from the rift zone can be fitted with dynamic crust formation models. Possible explanations for different thick ...
Asymmetric plume-ridge interaction around Iceland: The Kolbeinsey
... the Spar offset, a smaller nontransform discontinuity offsets the ridge by 10 km in a right lateral sense at 68430N. Magnetic data show that this offset formed at 5.5 Ma and has propagated northward through time. Thus the southern Kolbeinsey Ridge has lengthened to the north at a rate of 100 mm/y ...
... the Spar offset, a smaller nontransform discontinuity offsets the ridge by 10 km in a right lateral sense at 68430N. Magnetic data show that this offset formed at 5.5 Ma and has propagated northward through time. Thus the southern Kolbeinsey Ridge has lengthened to the north at a rate of 100 mm/y ...
Becker, T. W. - The University of Texas at Austin
... modeling of gravity and heat-flow data (Teixell et al., 2005; Missenard et al., 2006; Fullea et al., 2010), as well as results from some deep electrical resistivity studies (Anahnah et al., 2011), although the latter are debated (Jones et al., 2012). On the southern side of the Atlas, we find strik ...
... modeling of gravity and heat-flow data (Teixell et al., 2005; Missenard et al., 2006; Fullea et al., 2010), as well as results from some deep electrical resistivity studies (Anahnah et al., 2011), although the latter are debated (Jones et al., 2012). On the southern side of the Atlas, we find strik ...
compositional and thermal differences between lithospheric and
... asthenosphere and the cold thickened lithospheric mantle. Generally, standard delamination models have neglected density changes within the crust and the lithospheric mantle, which occur due to phase transitions and compositional variations upon changes of P-T parameters. Our attention is focused on ...
... asthenosphere and the cold thickened lithospheric mantle. Generally, standard delamination models have neglected density changes within the crust and the lithospheric mantle, which occur due to phase transitions and compositional variations upon changes of P-T parameters. Our attention is focused on ...
Wrench faults down to the asthenosphere
... We review a set of geological and geophysical observations that strongly support a coherent deformation of the entire lithosphere in major intracontinental wrench faults. Tectonic studies of wrench faults eroded down to the middle to lower crust show that, even in cases in which the lower to middle ...
... We review a set of geological and geophysical observations that strongly support a coherent deformation of the entire lithosphere in major intracontinental wrench faults. Tectonic studies of wrench faults eroded down to the middle to lower crust show that, even in cases in which the lower to middle ...
