STP 3 & 4 2.5S.1 Basic Geologic and Seismic Information
... 2.5S.1.1.2.4 Mesozoic Rifting (Opening of the Gulf of Mexico and the Atlantic) Although there was some sort of basin developed as the proto-Gulf of Mexico prior to the Cretaceous period, there was no connection to the Atlantic Ocean until the Early Cretaceous period. Jurassic-age salt deposits were ...
... 2.5S.1.1.2.4 Mesozoic Rifting (Opening of the Gulf of Mexico and the Atlantic) Although there was some sort of basin developed as the proto-Gulf of Mexico prior to the Cretaceous period, there was no connection to the Atlantic Ocean until the Early Cretaceous period. Jurassic-age salt deposits were ...
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... the petrologic and geochemical composition, rheological state, thermal evolution of the lithosphere. These xenoliths, fragments of wall rocks entrained by magmas at upper mantle and lower crustal levels, have been carried to the surface by alkaline basalts extreme rapidly, probably in less then 60 h ...
... the petrologic and geochemical composition, rheological state, thermal evolution of the lithosphere. These xenoliths, fragments of wall rocks entrained by magmas at upper mantle and lower crustal levels, have been carried to the surface by alkaline basalts extreme rapidly, probably in less then 60 h ...
India-Asia collision and the Cenozoic slowdown of the Indian plate
... ‘‘ridge-push’’ force that the ridges exert upon the surrounding plates, can be estimated using a plate cooling model [e.g., Parsons and Richter, 1980]. The torque about the center of the Earth which results from ridge push can therefore be calculated by integrating over the area of the plate the pot ...
... ‘‘ridge-push’’ force that the ridges exert upon the surrounding plates, can be estimated using a plate cooling model [e.g., Parsons and Richter, 1980]. The torque about the center of the Earth which results from ridge push can therefore be calculated by integrating over the area of the plate the pot ...
Three lithospheric transects across the Alps and their forelands
... The second TRANSALP transect V (section “NFP-20/EGT”) is located at the transition between the “Western” and “Eastern” Alps, corresponding to the western limit of the Austroalpine nappes of the Eastern Alps (mapped as “Apulian Plate north of the Periadriatic Line” in Fig. 1) that runs almost perpend ...
... The second TRANSALP transect V (section “NFP-20/EGT”) is located at the transition between the “Western” and “Eastern” Alps, corresponding to the western limit of the Austroalpine nappes of the Eastern Alps (mapped as “Apulian Plate north of the Periadriatic Line” in Fig. 1) that runs almost perpend ...
Post-Paleozoic activity
... Finally we examine the transition from rifting to drifting and conclude with a rift detachment model for the breakup of the Appalachian orogen and evolution of the Atlantic passive margin. ...
... Finally we examine the transition from rifting to drifting and conclude with a rift detachment model for the breakup of the Appalachian orogen and evolution of the Atlantic passive margin. ...
GSA Bulletin: Late Cenozoic tectonics of the central and southern
... The individual ranges are mutually similar in ...
... The individual ranges are mutually similar in ...
Melting depths and mantle heterogeneity beneath
... Abstract. Mantle melting calculations are presented that place constraints on the mineralogy of the basalt source region and partial melting depths for oceanic basalts. Melting depths are obtained from pressure-sensitive mineral-melt partition coefficients for Na, Ti, Hf, and the rare earth elements ...
... Abstract. Mantle melting calculations are presented that place constraints on the mineralogy of the basalt source region and partial melting depths for oceanic basalts. Melting depths are obtained from pressure-sensitive mineral-melt partition coefficients for Na, Ti, Hf, and the rare earth elements ...
State of lithosphere beneath Tien Shan from petrology and electrical
... [1] The shortening of Tien Shan and the evolution of its lithosphere have been evaluated from P‐T geothermobarometry of xenoliths and from comparison of their electrical conductivity with conductivities obtained from the inversion of magnetotelluric (MT) data. Spinel lherzolite and granulite xenolit ...
... [1] The shortening of Tien Shan and the evolution of its lithosphere have been evaluated from P‐T geothermobarometry of xenoliths and from comparison of their electrical conductivity with conductivities obtained from the inversion of magnetotelluric (MT) data. Spinel lherzolite and granulite xenolit ...
the granulite belt of lapland and the belomorides
... HAMEURT, J., 1984: Petrogenesis and evolution of an early Proterozoic collisional orogenic belt: The granulite belt of Lapland and the Belomorides (Fennoscandia). Bull. Geol. Soc. Finland 56, Part 1—2, 161—188. The tectonic and metamorphic pattern of the Precambrian crust exposed in the eastern Balt ...
... HAMEURT, J., 1984: Petrogenesis and evolution of an early Proterozoic collisional orogenic belt: The granulite belt of Lapland and the Belomorides (Fennoscandia). Bull. Geol. Soc. Finland 56, Part 1—2, 161—188. The tectonic and metamorphic pattern of the Precambrian crust exposed in the eastern Balt ...
Merlinleigh and Byro Sub-Basins
... is represented by the Ajana Fault System in the south, whereas further to the north basal Late Carboniferous to Early Permian sedimentary rocks of the Lyons Group transgress the Devonian to Early Carboniferous sequence of the Gascoyne Platform. In a limited area in the northwest the lowermost sedime ...
... is represented by the Ajana Fault System in the south, whereas further to the north basal Late Carboniferous to Early Permian sedimentary rocks of the Lyons Group transgress the Devonian to Early Carboniferous sequence of the Gascoyne Platform. In a limited area in the northwest the lowermost sedime ...
The Indonesian Sedimentologists Forum (FOSI)
... also recognized various continental blocks that rifted away from Australia in the Late Jurassic, including those currently exposed in the Indonesian region and forming the outer Banda Arc. The Banda Arc subduction-collision system began to develop in mid Miocene [ca. 18 Ma according to Charlton (200 ...
... also recognized various continental blocks that rifted away from Australia in the Late Jurassic, including those currently exposed in the Indonesian region and forming the outer Banda Arc. The Banda Arc subduction-collision system began to develop in mid Miocene [ca. 18 Ma according to Charlton (200 ...
Tectonic Framework of Basin Evolution in Peru
... sedimentary basin depends in some way upon the interaction of regional stress fields with ancient basement fabrics. Extensional subsidence will occur if the principal extensional stress σ3 at a particular time is at a high angle to a basement structure. Conversely, were there a change in regional st ...
... sedimentary basin depends in some way upon the interaction of regional stress fields with ancient basement fabrics. Extensional subsidence will occur if the principal extensional stress σ3 at a particular time is at a high angle to a basement structure. Conversely, were there a change in regional st ...
Catastrophic Granite Formation Rapid Melting of
... Stress gradients can also develop in the vicinity of an intruding basaltic heat source and promote local fractures. These processes, in conjunction with regional tectonic strain, are important in providing enhanced fracture permeabilities in the region of partial melting, which aid subsequent melt s ...
... Stress gradients can also develop in the vicinity of an intruding basaltic heat source and promote local fractures. These processes, in conjunction with regional tectonic strain, are important in providing enhanced fracture permeabilities in the region of partial melting, which aid subsequent melt s ...
A review of observations and models of dynamic
... to the thermo-chemical state of the continental lithosphere, which result in relatively large uncertainties (Kaban et al., 2003; Le Stunff and Ricard, 1995; Panasyuk and Hager, 2000) and underline the need for a better knowledge of the thermal and chemical structure of the lithosphere in order to co ...
... to the thermo-chemical state of the continental lithosphere, which result in relatively large uncertainties (Kaban et al., 2003; Le Stunff and Ricard, 1995; Panasyuk and Hager, 2000) and underline the need for a better knowledge of the thermal and chemical structure of the lithosphere in order to co ...
Seismic characterization of kerogen maturity: An example from Bakken shale
... Meissner, F., 1978, Petroleum geology of the Bakken Formation, Williston Basin, North Dakota and Montana: Proceedings of the Montana Geological Society Symposium, 207–227. Rickman, R., M. Mullen, E. Petre, B. Grieser, and D. Kundert, 2008, A practical use of shale petrophysics for simulation design ...
... Meissner, F., 1978, Petroleum geology of the Bakken Formation, Williston Basin, North Dakota and Montana: Proceedings of the Montana Geological Society Symposium, 207–227. Rickman, R., M. Mullen, E. Petre, B. Grieser, and D. Kundert, 2008, A practical use of shale petrophysics for simulation design ...
Continental Growth and Recycling in Convergent Orogens with
... basement are accreted to continents represent important sites of continental crustal growth and recycling. Crust accreted in these settings is dominated by an upper layer of recycled crustal and arc detritus (turbidites) underlain by a layer of tectonically imbricated upper oceanic crust and/or thin ...
... basement are accreted to continents represent important sites of continental crustal growth and recycling. Crust accreted in these settings is dominated by an upper layer of recycled crustal and arc detritus (turbidites) underlain by a layer of tectonically imbricated upper oceanic crust and/or thin ...
2.01 Cosmochemical Estimates of Mantle Composition
... At the beginning of the twentieth century Harkins at the University of Chicago thought that meteorites would provide a better estimate for the bulk composition of the Earth than the terrestrial rocks collected at the surface as we have only access to the “mere skin” of the Earth. Harkins made an att ...
... At the beginning of the twentieth century Harkins at the University of Chicago thought that meteorites would provide a better estimate for the bulk composition of the Earth than the terrestrial rocks collected at the surface as we have only access to the “mere skin” of the Earth. Harkins made an att ...
Earth`s heterogeneous mantle: A product of convection
... composition, pressure and temperature of melting, as well as the style of melting and melt mixing during melt extraction. Only then can we infer the distribution of heterogeneous source components, their size, mineralogical, chemical and isotopic composition, which is a prerequisite for understandin ...
... composition, pressure and temperature of melting, as well as the style of melting and melt mixing during melt extraction. Only then can we infer the distribution of heterogeneous source components, their size, mineralogical, chemical and isotopic composition, which is a prerequisite for understandin ...
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... recognition of the influence of orbital cycles in the rock record and (ii) the ability to predict orbital durations in the deep geologic past, both of which have engendered doubts about the reliability of the technique. The lower precision of 40Ar/39Ar dates (fig. S1) prevents estimation of the volu ...
... recognition of the influence of orbital cycles in the rock record and (ii) the ability to predict orbital durations in the deep geologic past, both of which have engendered doubts about the reliability of the technique. The lower precision of 40Ar/39Ar dates (fig. S1) prevents estimation of the volu ...
Upper mantle anisotropy of southeast Arabia passive margin [Gulf of
... In the first broadband deployment, 11 three-component broadband (Guralp CMG-40TD) stations were deployed in the period March 2003 until March 2004 (Fig. 2), recording at 50 samples per second. This was followed by a second deployment of 19 broadband stations in the period September 2005 to August 20 ...
... In the first broadband deployment, 11 three-component broadband (Guralp CMG-40TD) stations were deployed in the period March 2003 until March 2004 (Fig. 2), recording at 50 samples per second. This was followed by a second deployment of 19 broadband stations in the period September 2005 to August 20 ...
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.