Deep-sea basins of the Atlantic ocean
... Geological Institute of the Russian Academy of Sciences, Moscow ...
... Geological Institute of the Russian Academy of Sciences, Moscow ...
Formation and Evolution of Granite Magmas During
... melted region it could have been contaminated with refractory or residual phases such as biotite, plagioclase and quartz, as the host rocks disaggregated. The transition from patch migmatite to diatexite occurs on two scales. On the regional scale the transition occurs over hundreds of metres and is ...
... melted region it could have been contaminated with refractory or residual phases such as biotite, plagioclase and quartz, as the host rocks disaggregated. The transition from patch migmatite to diatexite occurs on two scales. On the regional scale the transition occurs over hundreds of metres and is ...
Pan-African granite emplacement mechanisms in the Eastern Desert
... these plutons reveals marginal sub-horizontal intrusive sheets as magma injection along preexisting flat-lying structures including mineral foliations and thrust faults. Space for emplacement .of granitic plutons was accommodated by uplift of the country rocks along steep marginal faults with rotati ...
... these plutons reveals marginal sub-horizontal intrusive sheets as magma injection along preexisting flat-lying structures including mineral foliations and thrust faults. Space for emplacement .of granitic plutons was accommodated by uplift of the country rocks along steep marginal faults with rotati ...
Rocks and More Rocks - Poster Elements
... Photo of Antelope Canyon by Moondigger, from http://en.wikipedia.org/wiki/Sedimentary_rock, used with permission Photo of shale close-up owned by U.S. Government, from http://en.wikipedia.org/wiki/Shale, released to public domain Photo of splitting shale by Mark A. Wilson from http://en.wikipedia.or ...
... Photo of Antelope Canyon by Moondigger, from http://en.wikipedia.org/wiki/Sedimentary_rock, used with permission Photo of shale close-up owned by U.S. Government, from http://en.wikipedia.org/wiki/Shale, released to public domain Photo of splitting shale by Mark A. Wilson from http://en.wikipedia.or ...
Gravitational collapse of the continental crust: definition, regimes
... mountain belts, in particular, but not only, in the waning stages of their orogenic evolution. However, owing to the lack of clear terminology and definitions, there is still confusion about what gravitational collapse is, how it relates to other types of gravitational driven flow and what its struc ...
... mountain belts, in particular, but not only, in the waning stages of their orogenic evolution. However, owing to the lack of clear terminology and definitions, there is still confusion about what gravitational collapse is, how it relates to other types of gravitational driven flow and what its struc ...
Gravitational collapse of the continental crust: definition, regimes
... mountain belts, in particular, but not only, in the waning stages of their orogenic evolution. However, owing to the lack of clear terminology and definitions, there is still confusion about what gravitational collapse is, how it relates to other types of gravitational driven flow and what its struc ...
... mountain belts, in particular, but not only, in the waning stages of their orogenic evolution. However, owing to the lack of clear terminology and definitions, there is still confusion about what gravitational collapse is, how it relates to other types of gravitational driven flow and what its struc ...
PHYSICAL GEOLOGY LABORATORY MANUAL
... The first important question a user of a map must answer is: "What part of the Earth's surface is portrayed?" In order to answer this question, one must be able to specify location on the surface of the Earth. The location of points or areas on the surface of the Earth can be shown by means of two g ...
... The first important question a user of a map must answer is: "What part of the Earth's surface is portrayed?" In order to answer this question, one must be able to specify location on the surface of the Earth. The location of points or areas on the surface of the Earth can be shown by means of two g ...
workshop report
... processed tuna; the same might be said about juvenile versus mature continental crust. Although there are many examples of accreted arc crust on the margins of continents, during- and/or post-collision geochemical changes are widespread (e.g., DeBari & Greene, 2011), and we don’t have the ability to ...
... processed tuna; the same might be said about juvenile versus mature continental crust. Although there are many examples of accreted arc crust on the margins of continents, during- and/or post-collision geochemical changes are widespread (e.g., DeBari & Greene, 2011), and we don’t have the ability to ...
Crustal thickening and lateral extrusion during the Indo
... include crustal thickening in the surrounding areas and erosion. In this calculation we assumed mass conservation of the crustal material. Some studies have found evidence for ecologites in the bottom of crust beneath southern Tibet (Jackson et al., 2004; Hetenyi et al., 2007). The potential eclogit ...
... include crustal thickening in the surrounding areas and erosion. In this calculation we assumed mass conservation of the crustal material. Some studies have found evidence for ecologites in the bottom of crust beneath southern Tibet (Jackson et al., 2004; Hetenyi et al., 2007). The potential eclogit ...
Provenance and correlation of sediments in Telemark, South Norway
... groups of sediments, commonly conglomeratic, and bimodal volcanic to sub-volcanic magmatic rocks above a major unconformity, called the Subsvinsaga unconformity. Here, we report detrital zircon U-Pb data from three sandstone units that have been alternatively placed below and above this unconformity ...
... groups of sediments, commonly conglomeratic, and bimodal volcanic to sub-volcanic magmatic rocks above a major unconformity, called the Subsvinsaga unconformity. Here, we report detrital zircon U-Pb data from three sandstone units that have been alternatively placed below and above this unconformity ...
Origin of marginal basins of the NW Pacific and their plate tectonic
... relative to the Eurasian plate. The Bohai Gulf basin rifted as a dextral pull-apart basin because of the dextral strike-slip offset along the Tanlu and East Taihanshan faults responding to the collision of India with Asia (e.g., Hu, 1982; Dewey et al., 1989). (5) Mixed models from the above for a si ...
... relative to the Eurasian plate. The Bohai Gulf basin rifted as a dextral pull-apart basin because of the dextral strike-slip offset along the Tanlu and East Taihanshan faults responding to the collision of India with Asia (e.g., Hu, 1982; Dewey et al., 1989). (5) Mixed models from the above for a si ...
The western margin of Mexico is ideally - Earth Science
... at other localities, extensional unroofing of all older assemblages resulted in recycling of zircon from all older units (1, 2, 3). (4) For the Santonian–Maastrichtian compressional arc assemblage, our new detrital zircon dates show for the first time that arc volcanic rocks of this age are present ...
... at other localities, extensional unroofing of all older assemblages resulted in recycling of zircon from all older units (1, 2, 3). (4) For the Santonian–Maastrichtian compressional arc assemblage, our new detrital zircon dates show for the first time that arc volcanic rocks of this age are present ...
Read the Paper. - Society of Economic Geologists
... gold and silver to form orebodies. During these episodes when faults and fractures are dilated, development of an upward-expanding column of boiling fluid promotes rapid ascent and high mass flow but also promotes silica and calcite precipitation, which can quickly reduce hydrothermal flow. Seismic ...
... gold and silver to form orebodies. During these episodes when faults and fractures are dilated, development of an upward-expanding column of boiling fluid promotes rapid ascent and high mass flow but also promotes silica and calcite precipitation, which can quickly reduce hydrothermal flow. Seismic ...
The Seismic Structure of Island Arc Crust
... compression are predominantly continental, though the Solomon arc, which is in collision with the Ontong Java plateau is an exception to this rule (Miura et al. 2004). In addition, some island arcs such as Japan have been built on, or contain some component of, remnant continental crust, and as such ...
... compression are predominantly continental, though the Solomon arc, which is in collision with the Ontong Java plateau is an exception to this rule (Miura et al. 2004). In addition, some island arcs such as Japan have been built on, or contain some component of, remnant continental crust, and as such ...
anorogenic granitoids of the early precambrian magmatism of the
... surrounding rocks occopy an subisometric area, which is believed to be a large ring structure, determined by satelite and air photos (Gintov 1974). This area is interpreted as a Lower Proterozoic depression, hosting the Korosten massif in its central part. According to Sollogub (1986), the massif is ...
... surrounding rocks occopy an subisometric area, which is believed to be a large ring structure, determined by satelite and air photos (Gintov 1974). This area is interpreted as a Lower Proterozoic depression, hosting the Korosten massif in its central part. According to Sollogub (1986), the massif is ...
The Central Basin Spreading Center in the Philippine Sea
... variations along the CBSC to higher melt supply in the western region caused by high mantle temperature and/or mantle heterogeneity, which may be related to a relatively smallscale mantle plume forming the oceanic plateaus located in the WPB. Another prominent feature of the CBSC is the development ...
... variations along the CBSC to higher melt supply in the western region caused by high mantle temperature and/or mantle heterogeneity, which may be related to a relatively smallscale mantle plume forming the oceanic plateaus located in the WPB. Another prominent feature of the CBSC is the development ...
The Central Basin Spreading Center in the Philippine Sea: Structure
... variations along the CBSC to higher melt supply in the western region caused by high mantle temperature and/or mantle heterogeneity, which may be related to a relatively smallscale mantle plume forming the oceanic plateaus located in the WPB. Another prominent feature of the CBSC is the development ...
... variations along the CBSC to higher melt supply in the western region caused by high mantle temperature and/or mantle heterogeneity, which may be related to a relatively smallscale mantle plume forming the oceanic plateaus located in the WPB. Another prominent feature of the CBSC is the development ...
Review of Upper Paleozoic and Lower Mesozoic stratigraphy and
... are made up of a mosaic of pre-Jurassic terranes, and that previously defined terranes are mostly composites of basements of different origins. Most of those terranes are allochthonous with respect to North America, but some developed not far from their present position. It has been suggested that t ...
... are made up of a mosaic of pre-Jurassic terranes, and that previously defined terranes are mostly composites of basements of different origins. Most of those terranes are allochthonous with respect to North America, but some developed not far from their present position. It has been suggested that t ...
DEEP STRUCTURE AND GEOPHYSICAL PROCESSES BENEATH
... an empirical formulation (Schatz, 1971). are given in Appendix A. ...
... an empirical formulation (Schatz, 1971). are given in Appendix A. ...
Paper - EarthByte
... surveys, have been made available to the scientific community through the GEODAS (GEOphysical Data System) archive, developed by the US National Geophysical Data Center (NGDC) (Sharman et al., 2001). A sub-set of these data, which have been error-checked for observational outliers, excessive gradie ...
... surveys, have been made available to the scientific community through the GEODAS (GEOphysical Data System) archive, developed by the US National Geophysical Data Center (NGDC) (Sharman et al., 2001). A sub-set of these data, which have been error-checked for observational outliers, excessive gradie ...
Geomorphological processes - University of London International
... the hillslope response to rainfall and the way rivers behave following heavy rain. It also encompasses processes of erosion at the ground surface and within the soil profile. These affect the way hillslopes change over time. Landforms are made up of interlinked surfaces (slopes) so the understanding ...
... the hillslope response to rainfall and the way rivers behave following heavy rain. It also encompasses processes of erosion at the ground surface and within the soil profile. These affect the way hillslopes change over time. Landforms are made up of interlinked surfaces (slopes) so the understanding ...
GUIDE TO PLATE TECTONICS AND EARTHQUAKES
... The distribution and properties of plates and the motions at different kinds of plate boundaries explain global-scale patterns of earthquakes and volcanoes. The Plate Tectonic PowerPoint Presentation is an introduction to plate tectonics with links to teaching resources tailored for a middle school ...
... The distribution and properties of plates and the motions at different kinds of plate boundaries explain global-scale patterns of earthquakes and volcanoes. The Plate Tectonic PowerPoint Presentation is an introduction to plate tectonics with links to teaching resources tailored for a middle school ...
Large igneous province
A large igneous province (LIP) is an extremely large accumulation of igneous rocks, including liquid rock (intrusive) or volcanic rock formations (extrusive), when hot magma extrudes from inside the Earth and flows out. The source of many or all LIPs is variously attributed to mantle plumes or to processes associated with plate tectonics. Types of LIPs can include large volcanic provinces (LVP), created through flood basalt and large plutonic provinces (LPP). Eleven distinct flood basalt episodes occurred in the past 250 million years, creating volcanic provinces, which coincided with mass extinctions in prehistoric times. Formation depends on a range of factors, such as continental configuration, latitude, volume, rate, duration of eruption, style and setting (continental vs. oceanic), the preexisting climate state, and the biota resilience to change.