Quiescent deformation of the Aniakchak Caldera, Alaska, mapped
... The 10-km-wide caldera of the historically active Aniakchak volcano, Alaska, subsides ;13 mm/yr, based on data from 19 European Remote Sensing Satellite (ERS-1 and ERS2) interferometric synthetic aperture radar (InSAR) images from 1992 through 2002. The pattern of subsidence does not reflect the dis ...
... The 10-km-wide caldera of the historically active Aniakchak volcano, Alaska, subsides ;13 mm/yr, based on data from 19 European Remote Sensing Satellite (ERS-1 and ERS2) interferometric synthetic aperture radar (InSAR) images from 1992 through 2002. The pattern of subsidence does not reflect the dis ...
Planetary Geology - Max Planck Institute for Solar System Research
... even after this period, gravitational instabilities within the solar system brought into collisions planetary bodies of considerable size with catastrophic consequences for the young planets (as explained in the previous slide). ...
... even after this period, gravitational instabilities within the solar system brought into collisions planetary bodies of considerable size with catastrophic consequences for the young planets (as explained in the previous slide). ...
The importance of radiative heat transfer on superplumes in the
... A new post-perovskite phase has been identified recently from both X-ray observations and first-principles calculations. This novel phase change occurs at a depth about 200 km above the core–mantle boundary for temperatures of around 2800 K. Using a two-dimensional, extended Boussinesq model, we hav ...
... A new post-perovskite phase has been identified recently from both X-ray observations and first-principles calculations. This novel phase change occurs at a depth about 200 km above the core–mantle boundary for temperatures of around 2800 K. Using a two-dimensional, extended Boussinesq model, we hav ...
SubFac abstract from Robert J. Stern
... Pacific Plate now outboard of southern IBM. As a result, there are significant differences in the bulk composition of subducted sedimentary columns in the north and south, although the thickness of sediments is relatively constant at about 500m [2]. This modest sediment thickness is well below the ~ ...
... Pacific Plate now outboard of southern IBM. As a result, there are significant differences in the bulk composition of subducted sedimentary columns in the north and south, although the thickness of sediments is relatively constant at about 500m [2]. This modest sediment thickness is well below the ~ ...
Author`s personal copy - School of Arts and Sciences
... quantified (Jordan et al., 1997) as well as potentially inaccurate if deformation and uplift are decoupled, and (2) uncertainties associated with direct observations of the elevation history using paleoaltimetry techniques are often substantial (e.g. ± ≥1000 m, Gregory-Wodzicki, 2000). Furthermore, n ...
... quantified (Jordan et al., 1997) as well as potentially inaccurate if deformation and uplift are decoupled, and (2) uncertainties associated with direct observations of the elevation history using paleoaltimetry techniques are often substantial (e.g. ± ≥1000 m, Gregory-Wodzicki, 2000). Furthermore, n ...
Plume heads, continental lithosphere, flood
... geoid highs and LVA to about200 kmdepth. There are many very low-velocity regions (VLVA) that are not near hotspots. It is likely that a combination of hot mantle plus appropriate lithospheric and stress conditions are required for hotspot upwellings to occur. The absence of ltotspots above the VLVA ...
... geoid highs and LVA to about200 kmdepth. There are many very low-velocity regions (VLVA) that are not near hotspots. It is likely that a combination of hot mantle plus appropriate lithospheric and stress conditions are required for hotspot upwellings to occur. The absence of ltotspots above the VLVA ...
44. Mesozoic-Cenozoic Geology of the Eastern Margin of the Grand
... lowed by a two-stage transition to the tectonic setting of a passive continental margin. The stratigraphic record can be divided into six depositional sequences based on widely mappable seismic sequences that have been synthesized with lithostratigraphic and biostratigraphic data from oil exploratio ...
... lowed by a two-stage transition to the tectonic setting of a passive continental margin. The stratigraphic record can be divided into six depositional sequences based on widely mappable seismic sequences that have been synthesized with lithostratigraphic and biostratigraphic data from oil exploratio ...
47. the ocean/continent transition beneath the iberia abyssal plain
... crustal and lithospheric scale and magmatism that has its roots in adiabatic decompression melting within the asthenosphere. Rifted margins at which magmatism dominates are often described as volcanic, and those where it plays an apparently insignificant role are called nonvolcanic, even though a sp ...
... crustal and lithospheric scale and magmatism that has its roots in adiabatic decompression melting within the asthenosphere. Rifted margins at which magmatism dominates are often described as volcanic, and those where it plays an apparently insignificant role are called nonvolcanic, even though a sp ...
Tectonic Evolution and Dynamics of Deepwater Area of Pearl River
... lines have clear basement reflection and relatively integrated stratigraphic sequences, and cross all the major structural units of the study area. Quantitative studies are carried out based on these lines as well as some drilling wells in or around the deepwater area. The stratigraphic development ...
... lines have clear basement reflection and relatively integrated stratigraphic sequences, and cross all the major structural units of the study area. Quantitative studies are carried out based on these lines as well as some drilling wells in or around the deepwater area. The stratigraphic development ...
Recent Refinements in Geophysical Constraints on Lunar Origin
... Prior to the Clementine Mission (sponsored by the Ballistic Missile Defense Organization and NASA; Nozette et al., 1994), the best global-scale representation of lunar topography was a 12th degree and order spherical harmonic model by Bills and Ferrari (1977) that incorporated Apollo laser altimeter ...
... Prior to the Clementine Mission (sponsored by the Ballistic Missile Defense Organization and NASA; Nozette et al., 1994), the best global-scale representation of lunar topography was a 12th degree and order spherical harmonic model by Bills and Ferrari (1977) that incorporated Apollo laser altimeter ...
The lunar moho and the internal structure of the Moon
... shaped to a large extent from knowledge and data acquired during and after the Apollo missions and continues up to this day. Through analysis of returned samples, data from surface-deployed experiments, and remote sensing the Apollo program of the late 60s and early 70s did much to advance our under ...
... shaped to a large extent from knowledge and data acquired during and after the Apollo missions and continues up to this day. Through analysis of returned samples, data from surface-deployed experiments, and remote sensing the Apollo program of the late 60s and early 70s did much to advance our under ...
101 - Durham University Community
... popular view states that the enriched component of OIB comes from recycled continental crust (RCC, i.e.; terrigenous sediments). While both CC and OIB are enriched in many incompatible elements (e.g., both have [La/Sm]PM >>1), the CC has characteristic enrichment in Pb and deletion in Nb, Ta, P and ...
... popular view states that the enriched component of OIB comes from recycled continental crust (RCC, i.e.; terrigenous sediments). While both CC and OIB are enriched in many incompatible elements (e.g., both have [La/Sm]PM >>1), the CC has characteristic enrichment in Pb and deletion in Nb, Ta, P and ...
Fluid Processes in Subduction Zones Hydrous Minerals and
... great depth in cool s.z. • Distribution + amount of H2O incoming lithosphere is critical unknown ...
... great depth in cool s.z. • Distribution + amount of H2O incoming lithosphere is critical unknown ...
304
... found at the surface of the earth. Geomorphology approaches these questions by identifying all of the earth’s landforms, including mountains, lakes, lava flows, fault scarps, beaches, terraces, moraines, etc., and then studying them to determine what processes created them. The origin of the various ...
... found at the surface of the earth. Geomorphology approaches these questions by identifying all of the earth’s landforms, including mountains, lakes, lava flows, fault scarps, beaches, terraces, moraines, etc., and then studying them to determine what processes created them. The origin of the various ...
Magnetotelluric Studies at the San Andreas Fault Zone: Implications
... The weakening effects of fluids suggest that deep conductive zones imaged with MT often correspond to mechanically weak zones. Türkoglu et al. (2008) pointed out that it is important to separate cause and effect when addressing the relationship between aqueous fluids and/or partial melts and deform ...
... The weakening effects of fluids suggest that deep conductive zones imaged with MT often correspond to mechanically weak zones. Türkoglu et al. (2008) pointed out that it is important to separate cause and effect when addressing the relationship between aqueous fluids and/or partial melts and deform ...
Eclogite-facies shear zones-deep crustal reflectors?
... determined, V, for the granulite-facies protoliths average about 7.5 km s - ‘. High calculated reflection coefficients for these shear zones, 0.04-0.14, indicate that they are excellent candidates for deep crustal reflectors in portions of crust that experienced high-pressure conditions but escaped ...
... determined, V, for the granulite-facies protoliths average about 7.5 km s - ‘. High calculated reflection coefficients for these shear zones, 0.04-0.14, indicate that they are excellent candidates for deep crustal reflectors in portions of crust that experienced high-pressure conditions but escaped ...
Originally published as: Ivanova, A., Kashubin, A
... about 22000 tons of CO2 had been injected. We show here that rather complex time-lapse signatures of this CO2 can be clearly observed within a radius of about 300 m from the injection well. The highly irregular amplitude response within this radius is attributed to the heterogeneity of the injection ...
... about 22000 tons of CO2 had been injected. We show here that rather complex time-lapse signatures of this CO2 can be clearly observed within a radius of about 300 m from the injection well. The highly irregular amplitude response within this radius is attributed to the heterogeneity of the injection ...
geomorphology - About Manidhaneyam
... Earth’s overall structure into three major sections: the lithosphere, or outer layer of rock like material; the asthenosphere; and the centrosphere, or central part of the planet. The asthenosphere gets its name from the Greek world for weak, asthenis, because of the relatively fragile nature of the ...
... Earth’s overall structure into three major sections: the lithosphere, or outer layer of rock like material; the asthenosphere; and the centrosphere, or central part of the planet. The asthenosphere gets its name from the Greek world for weak, asthenis, because of the relatively fragile nature of the ...
Magmatism at Rift Zones: The Generation of Volcanic Continental
... crust is easyto determineusingseafloorspreadingmagnetic anomalies and the seafloordepth increasesmono- [1986],so we use this as an example. The Cape Verde tonicallywith agein a well-knownmanneras the litho- swellis a good exampleto model becausethe overlying ...
... crust is easyto determineusingseafloorspreadingmagnetic anomalies and the seafloordepth increasesmono- [1986],so we use this as an example. The Cape Verde tonicallywith agein a well-knownmanneras the litho- swellis a good exampleto model becausethe overlying ...
corrected _ earthqua.. - Indian Tsunami Early Warning System
... (extent of energy release during the earthquake), focal depth or hypocenter (the depth at which the rupture initiates), the epicenter location of the earthquake (the vertical projection of the hypocenter to the surface). Thus bigger magnitude earthquake at shallower depth (< 30 km) with its epicente ...
... (extent of energy release during the earthquake), focal depth or hypocenter (the depth at which the rupture initiates), the epicenter location of the earthquake (the vertical projection of the hypocenter to the surface). Thus bigger magnitude earthquake at shallower depth (< 30 km) with its epicente ...
Radiogenic Isotope Geochemistry of the Mantle
... A principal objective of geology is to understand how the Earth evolved from its initial state to its present one. Radiogenic isotope geochemistry is uniquely suited for this sort of study because an isotope ratio such as 87Sr/86Sr is a function not only of the differentiation processes which fracti ...
... A principal objective of geology is to understand how the Earth evolved from its initial state to its present one. Radiogenic isotope geochemistry is uniquely suited for this sort of study because an isotope ratio such as 87Sr/86Sr is a function not only of the differentiation processes which fracti ...
(Cambridge: Cambridge University Press, 1988), 1-2, 37
... Alfred L. Wegener proposed in 1912 that all the continents had once been united, had broken apart, and had drifted through the ocean floor to their current locations. This 'Drift' theory' conflicted with the two prevailing views. 'Permanentists' believed that continents and ocean basins had remained ...
... Alfred L. Wegener proposed in 1912 that all the continents had once been united, had broken apart, and had drifted through the ocean floor to their current locations. This 'Drift' theory' conflicted with the two prevailing views. 'Permanentists' believed that continents and ocean basins had remained ...
Characterizing the Main Himalayan Thrust in the Garhwal Himalaya
... Himalaya, defined topographically and separated by a physiographic break in slope, correspond approximately to the LHS and the GHC (Yin, 2006). The Main Central Thrust (MCT) is a crustal-scale south-vergent thrust fault and zone of high ductile strain (cf. Searle et al., 2008). The upper boundary of ...
... Himalaya, defined topographically and separated by a physiographic break in slope, correspond approximately to the LHS and the GHC (Yin, 2006). The Main Central Thrust (MCT) is a crustal-scale south-vergent thrust fault and zone of high ductile strain (cf. Searle et al., 2008). The upper boundary of ...
Belize - Onshore Stratigraphy and Renewed Onshore Petroleum
... Petroleum traps at the newly discovered Spanish Lookout oil field, and another new oil field (Never Delay) located nearby, are structural in nature. At this time, Spanish Lookout oil field is producing approximately 5000 bbl/day, but may have the potential for perhaps as much as 7000 bbl/day. Older ...
... Petroleum traps at the newly discovered Spanish Lookout oil field, and another new oil field (Never Delay) located nearby, are structural in nature. At this time, Spanish Lookout oil field is producing approximately 5000 bbl/day, but may have the potential for perhaps as much as 7000 bbl/day. Older ...
Earthscope
Earthscope is an earth science program using geological and geophysical techniques to explore the structure and evolution of the North American continent and to understand the processes controlling earthquakes and volcanoes. The project has three components: USARRAY, the Plate Boundary Observatory, and the San Andreas Fault Observatory at Depth.The project is funded by the National Science Foundation (NSF), and the data produced is publicly accessible in real-time. Organizations associated with the project include UNAVCO, the Incorporated Research Institutions for Seismology (IRIS), Stanford University, the United States Geological Survey (USGS) and National Aeronautics and Space Administration (NASA). Several international organizations also contribute to the initiative.