International Ocean Discovery Program Expedition 360 Scientific
... Moho could equally represent an alteration front boundary between altered and unaltered peridotites and need not coincide with the crust/mantle boundary at all. Instead, the Moho could lie well within Layer 3. If this is the case, we know less about the architecture and composition of the ocean lith ...
... Moho could equally represent an alteration front boundary between altered and unaltered peridotites and need not coincide with the crust/mantle boundary at all. Instead, the Moho could lie well within Layer 3. If this is the case, we know less about the architecture and composition of the ocean lith ...
Shallow crustal magma chamber of Coaxial Segment
... Line 1 crosses the Coaxial segment source Site at 46.18°N. A distinct shadow zone and Pg arrivals delayed by 0.1-0.3 s are evident on record sections from both OBS 1 and OBS 2, at source-OBS ranges of 14-20 km (Fig. 2, bottom). These features occur at just those positions along line 1 where the Pg w ...
... Line 1 crosses the Coaxial segment source Site at 46.18°N. A distinct shadow zone and Pg arrivals delayed by 0.1-0.3 s are evident on record sections from both OBS 1 and OBS 2, at source-OBS ranges of 14-20 km (Fig. 2, bottom). These features occur at just those positions along line 1 where the Pg w ...
The Geological Concept
... abrupt elevations of less than 305 meters, all altitudes exceeding this being mountains". Indeed, in many of the American references, elevations above 300 m are considered mountains. A mountain range is defined (op. cit.) as a single, large mass consisting of a succession of mountains or narrowly sp ...
... abrupt elevations of less than 305 meters, all altitudes exceeding this being mountains". Indeed, in many of the American references, elevations above 300 m are considered mountains. A mountain range is defined (op. cit.) as a single, large mass consisting of a succession of mountains or narrowly sp ...
Properties of iron at the Earth`s core conditions
... Irvine (1977) derived a melting theory using a thermodynamic equilibrium approach starting from the Clausius-Clapeyron equation. The results of these two theories differ slightly from equations ( 3 ) , but not significantly, considering the uncertainty of other measurements of iron at high pressure. ...
... Irvine (1977) derived a melting theory using a thermodynamic equilibrium approach starting from the Clausius-Clapeyron equation. The results of these two theories differ slightly from equations ( 3 ) , but not significantly, considering the uncertainty of other measurements of iron at high pressure. ...
Ordinary Kriging
... In the “hard” rocks (higher acoustic impedance, lower porosity and greater density) is the shorter particle movements and pressure increase. The reflected seismic wave amplitude changes are a good indicator for elastic properties. ...
... In the “hard” rocks (higher acoustic impedance, lower porosity and greater density) is the shorter particle movements and pressure increase. The reflected seismic wave amplitude changes are a good indicator for elastic properties. ...
Author`s personal copy - Géosciences Montpellier
... the forearc rocks that have been sampled might have formed after subduction began, particularly if they did not formed in the former forearc (Deschamps and Lallemand, 2003). Indeed, IBM is an erosional margin with rates of forearc consumption of several kilometers per million years (von Huene and Sc ...
... the forearc rocks that have been sampled might have formed after subduction began, particularly if they did not formed in the former forearc (Deschamps and Lallemand, 2003). Indeed, IBM is an erosional margin with rates of forearc consumption of several kilometers per million years (von Huene and Sc ...
Shear wave anisotropy beneath the Cascadia subduction zone and
... on its eastern edge by the active Cascade Volcanic Chain. We take the backarc to be the high-temperature, thin lithosphere region that extends eastward from the Cascade Volcanic Chain. The eastern limit of this region is concluded to coincide with the Rocky Mountain Trench (RMT). There is a pronounc ...
... on its eastern edge by the active Cascade Volcanic Chain. We take the backarc to be the high-temperature, thin lithosphere region that extends eastward from the Cascade Volcanic Chain. The eastern limit of this region is concluded to coincide with the Rocky Mountain Trench (RMT). There is a pronounc ...
SDO Systems Retreat - Stanford University
... will be a numerical field that can have one of three values:
0 - Delivery Pending; File has not been delivered for whatever reason
1 - Delivered; DDS thinks file has been delivered, waiting for SOC ACK
...
...
Getting to Know Vesta PSRD: Getting to Know Vesta
... This is a plot of the concentrations of oxides of Si, Fe, Ti, Mg, Al, Ca, Cr, Mn, Na, and K measured in HED meteorites versus their concentrations calculated from the mixing model developed by Usui and McSween. The dashed line represents perfect agreement between the two. In general the agreement is ...
... This is a plot of the concentrations of oxides of Si, Fe, Ti, Mg, Al, Ca, Cr, Mn, Na, and K measured in HED meteorites versus their concentrations calculated from the mixing model developed by Usui and McSween. The dashed line represents perfect agreement between the two. In general the agreement is ...
Two Views of the Moon's Composition posted April 3, 2007
... though many others have followed suit. The Taylor-cubed paper takes a new look at the idea, using data from lunar meteorites and remote sensing. We focus on the concentrations of Al2O3 and thorium. Both are refractory elements, but behave differently geochemically: Aluminum goes into pyroxene to som ...
... though many others have followed suit. The Taylor-cubed paper takes a new look at the idea, using data from lunar meteorites and remote sensing. We focus on the concentrations of Al2O3 and thorium. Both are refractory elements, but behave differently geochemically: Aluminum goes into pyroxene to som ...
Metamorphic processes in the subducting slab and overlying mantle
... themes proposed by the science plan: (1) How do forcing functions such as convergence rate and upper plate thickness regulate production of magma and fluid from the Subduction Factory? (2) How does the volatile cycle (H2O and CO2) impact biological, physical and chemical processes from trench to dee ...
... themes proposed by the science plan: (1) How do forcing functions such as convergence rate and upper plate thickness regulate production of magma and fluid from the Subduction Factory? (2) How does the volatile cycle (H2O and CO2) impact biological, physical and chemical processes from trench to dee ...
Geology of the Southern Carnarvon Basin
... Release Area (W11-16) overlaps all three elements, whereas the southern Release Area (W11-17) lies almost entirely on the Bernier Platform. Structural architecture of the area is documented only at reconnaissance level. Faults shown on Figure 3 include major faults mapped from seismic data at the Va ...
... Release Area (W11-16) overlaps all three elements, whereas the southern Release Area (W11-17) lies almost entirely on the Bernier Platform. Structural architecture of the area is documented only at reconnaissance level. Faults shown on Figure 3 include major faults mapped from seismic data at the Va ...
Divergent Plate Boundaries - North Coast Distance Education
... across the South Pacific, ending in the Gulf of California, a total length of about 70,000 km. Without question, it is the greatest “mountain” system on Earth. The internal structures of the “mountains” of the oceanic ridge, however, are nothing like the mountains of the continents, which largely co ...
... across the South Pacific, ending in the Gulf of California, a total length of about 70,000 km. Without question, it is the greatest “mountain” system on Earth. The internal structures of the “mountains” of the oceanic ridge, however, are nothing like the mountains of the continents, which largely co ...
Earth Planet. Sci. Lett., 139, 1-16, 1996.
... 1211 averaged to 0.25” and corrected for the variations of sound speed in water, sediment loading and seafloor age, using the standard thermal-plate model [9]. The superswell hypothesis relies heavily on recognizing a depth anomaly which has a magnitude and spatial distribution inconsistent with the ...
... 1211 averaged to 0.25” and corrected for the variations of sound speed in water, sediment loading and seafloor age, using the standard thermal-plate model [9]. The superswell hypothesis relies heavily on recognizing a depth anomaly which has a magnitude and spatial distribution inconsistent with the ...
Mass wasting on the submarine Lomonosov Ridge, central Arctic
... The data was binned and stacked using velocities derived from sonobuoy measurements (Jokat et al., 1995a) and a band pass filter applied before display. Optimum stacking velocities can not be obtained from multi-channel data from this region, because the need for frequent and rapid recovery renders ...
... The data was binned and stacked using velocities derived from sonobuoy measurements (Jokat et al., 1995a) and a band pass filter applied before display. Optimum stacking velocities can not be obtained from multi-channel data from this region, because the need for frequent and rapid recovery renders ...
Isostasy, dynamic topography, and the elevation of the Apennines of
... quantify the relative contribution of isostatic and dynamic components, providing new insights on the range of subduction processes contributing to the topography and vertical motion of the Apennines mountain belt. 2. Isostasy, elevation and uplift rate The elevation of a mountain belt and rate of s ...
... quantify the relative contribution of isostatic and dynamic components, providing new insights on the range of subduction processes contributing to the topography and vertical motion of the Apennines mountain belt. 2. Isostasy, elevation and uplift rate The elevation of a mountain belt and rate of s ...
The Recognition of Strike-Slip Fault Systems Using Imagery
... not produce high scarps. Fault scarps and fault-line scarps tend (Figure 4) of the area clearly show the principal strike-slip feato face one way and then the other, depending on the lateral tures of the two fault systems. Note that the overall pattern of offset of topographic highs and lows, or of ...
... not produce high scarps. Fault scarps and fault-line scarps tend (Figure 4) of the area clearly show the principal strike-slip feato face one way and then the other, depending on the lateral tures of the two fault systems. Note that the overall pattern of offset of topographic highs and lows, or of ...
An integrated geophysical analysis of the upper crust of the southern
... upper crustal features (e.g. Simiyu & Keller 1997). Attempts to separate these anomalies using different methods [smoothing (Searle 1970), tying to outcrops of Precambrian basement (Baker & Wohlenberg 1971), a combination of these approaches including balancing of the thickness and density of the ri ...
... upper crustal features (e.g. Simiyu & Keller 1997). Attempts to separate these anomalies using different methods [smoothing (Searle 1970), tying to outcrops of Precambrian basement (Baker & Wohlenberg 1971), a combination of these approaches including balancing of the thickness and density of the ri ...
Uplift of the western margin of the Andean plateau revealed from
... explanation, and there is no evidence for a climate change that could induce a pulse of incision at this time. The interpreted drying of climate starting at ca. 15 Ma (e.g., Hartley, 2003; Rech et al., 2006) should have the opposite effect of deterring incision, rather than generating a pulse of inc ...
... explanation, and there is no evidence for a climate change that could induce a pulse of incision at this time. The interpreted drying of climate starting at ca. 15 Ma (e.g., Hartley, 2003; Rech et al., 2006) should have the opposite effect of deterring incision, rather than generating a pulse of inc ...
Crustal structure of central and northern Iceland from analysis of
... data from the other seven stations are given in the Appendix. Most of the REN radial receiver functions have large amplitudes compared with the pre-signal noise and the tangential amplitudes (Fig. 2), suggesting signi®cant impedance contrasts below the station, and there is a strong coherence in arr ...
... data from the other seven stations are given in the Appendix. Most of the REN radial receiver functions have large amplitudes compared with the pre-signal noise and the tangential amplitudes (Fig. 2), suggesting signi®cant impedance contrasts below the station, and there is a strong coherence in arr ...
Geophysical-petrological model of the crust and upper mantle in the
... The India-Eurasia collision zone consists of a large amalgamation of crustal and lithospheric domains, accreted each other throughout time. The India peninsula is formed by an ancient continental crust (the Precambrian Indian shield), which is itself a collage of cratonic blocks and mobile belts ass ...
... The India-Eurasia collision zone consists of a large amalgamation of crustal and lithospheric domains, accreted each other throughout time. The India peninsula is formed by an ancient continental crust (the Precambrian Indian shield), which is itself a collage of cratonic blocks and mobile belts ass ...
Laramide crustal thickening event in the Rocky Mountain Foreland
... The same shear tractions that Brewer et al. [1980] invoked to cause the Wind River range overthrust may also have dragged and transported ...
... The same shear tractions that Brewer et al. [1980] invoked to cause the Wind River range overthrust may also have dragged and transported ...
Summary of Research Projects John W. Shervais Department of Geology Professor and Head
... overlying crust was extracted, and its mineralogy and composition reflect the processes that have affected it through time, including melt extraction, fluid phase enrichment, and subsequent interactions with melt derived from lower in the mantle tectosphere. These processes have been frozen in place ...
... overlying crust was extracted, and its mineralogy and composition reflect the processes that have affected it through time, including melt extraction, fluid phase enrichment, and subsequent interactions with melt derived from lower in the mantle tectosphere. These processes have been frozen in place ...
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.