Seismic structure of the crust and uppermost mantle of the Capricorn
... The Paterson Orogen is located on the northeastern fringe of the West Australian Craton and is interpreted to record the collision of the West and North Australian Cratons at approximately 1.78 Ga (Smithies and Bagas, 1997). It is crossed by the shorter of the two passive seismic transects in this s ...
... The Paterson Orogen is located on the northeastern fringe of the West Australian Craton and is interpreted to record the collision of the West and North Australian Cratons at approximately 1.78 Ga (Smithies and Bagas, 1997). It is crossed by the shorter of the two passive seismic transects in this s ...
The Tolbachik volcanic massif: A review of the petrology
... Tolbachik Fissure Eruption (GTFE), which was one of the largest eruptions of the 20th century and one of the six largest basaltic fissure eruptions in historical time. By the end of the GTFE, 2.2 km3 of volcanic products of variable basaltic compositions with MORB-like isotopic characteristics covere ...
... Tolbachik Fissure Eruption (GTFE), which was one of the largest eruptions of the 20th century and one of the six largest basaltic fissure eruptions in historical time. By the end of the GTFE, 2.2 km3 of volcanic products of variable basaltic compositions with MORB-like isotopic characteristics covere ...
Pan-African granite emplacement mechanisms in the Eastern Desert
... to syenogranites were intruded during active thrusting, i.e. in a compressional terrain, while Abdel-Rahman (I 995) pictured them in an Andean setting with their intrusion ...
... to syenogranites were intruded during active thrusting, i.e. in a compressional terrain, while Abdel-Rahman (I 995) pictured them in an Andean setting with their intrusion ...
Sublayer and Offset Dikes of the Sudbury Igneous
... Onaping formation above the SIC, the units of the SIC itself and a dense unit immediately beneath the SIC (which projects up dip to coincide with the granulitic facies of the Levack gneiss complex) dip south at an average of 25¥ (Milkereit et al. 1992). Reflections from the upper strata (sediments a ...
... Onaping formation above the SIC, the units of the SIC itself and a dense unit immediately beneath the SIC (which projects up dip to coincide with the granulitic facies of the Levack gneiss complex) dip south at an average of 25¥ (Milkereit et al. 1992). Reflections from the upper strata (sediments a ...
Introduction - Beck-Shop
... primitive crust most probably was mafic, and formed on top of a previously convecting magma ocean of uncertain depth (Boyet et al., 2003). However, no outcrop evidence of this earliest primitive crust is known to have survived, probably due to the intense meteor bombardment that affected Earth betwe ...
... primitive crust most probably was mafic, and formed on top of a previously convecting magma ocean of uncertain depth (Boyet et al., 2003). However, no outcrop evidence of this earliest primitive crust is known to have survived, probably due to the intense meteor bombardment that affected Earth betwe ...
- BIROn - Birkbeck Institutional Research Online
... Anorogenic magmatism also occurs in the Iberian peninsula, mainly in the Caltrava province of south central Spain, and within the south-eastern Pyrenees near Olot. Although magmatism initiated locally in the latest Cretaceous-Paleocene, the major phase of activity in western and central Europe occur ...
... Anorogenic magmatism also occurs in the Iberian peninsula, mainly in the Caltrava province of south central Spain, and within the south-eastern Pyrenees near Olot. Although magmatism initiated locally in the latest Cretaceous-Paleocene, the major phase of activity in western and central Europe occur ...
Plate Tectonics - The Open University
... http://www.open.edu/openlearn/science-maths-technology/science/geology/platetectonics/content-section-0. There you'll also be able to track your progress via your activity record, which you ...
... http://www.open.edu/openlearn/science-maths-technology/science/geology/platetectonics/content-section-0. There you'll also be able to track your progress via your activity record, which you ...
Continental crust generated in oceanic arcs
... Figure 5 | Integrated continental index results. a, CI versus average VP (from depth >10 km to a maximum velocity of 7.6 km s−1 , Supplementary Table 4). Arcs with no P-wave velocity data are represented as grey asterisks and their VP values are from the correlation equation in Fig. 4a. Uncertaintie ...
... Figure 5 | Integrated continental index results. a, CI versus average VP (from depth >10 km to a maximum velocity of 7.6 km s−1 , Supplementary Table 4). Arcs with no P-wave velocity data are represented as grey asterisks and their VP values are from the correlation equation in Fig. 4a. Uncertaintie ...
An Application for European Geopark Status for the Aspiring Bakony
... Continental climate characteristic of the most part of the Carpathian Basin and characterised by dry and warm summers and cold winters, occurs in alternating intensity. It is modified by Atlantic air masses coming from the NW and resulting in humid and cool summers and mild winters, and by the Medit ...
... Continental climate characteristic of the most part of the Carpathian Basin and characterised by dry and warm summers and cold winters, occurs in alternating intensity. It is modified by Atlantic air masses coming from the NW and resulting in humid and cool summers and mild winters, and by the Medit ...
Comparison of the Central Metamorphic Belt and Trinity terrane of
... into seven major lithostratigraphic units (Edelman and others, 1989). These are, from west to east, the Smartville, Slate Creek, Fiddle Creek, Calaveras,Red Ant, Feather River, and Northern Sierra terranes (Fig. 2). The latter five units were juxtaposed along early, low-angle, west-directed, large-d ...
... into seven major lithostratigraphic units (Edelman and others, 1989). These are, from west to east, the Smartville, Slate Creek, Fiddle Creek, Calaveras,Red Ant, Feather River, and Northern Sierra terranes (Fig. 2). The latter five units were juxtaposed along early, low-angle, west-directed, large-d ...
Continental crust generated in oceanic arcs
... Figure 5 | Integrated continental index results. a, CI versus average VP (from depth >10 km to a maximum velocity of 7.6 km s 1 , Supplementary Table 4). Arcs with no P-wave velocity data are represented as grey asterisks and their VP values are from the correlation equation in Fig. 4a. Uncertaintie ...
... Figure 5 | Integrated continental index results. a, CI versus average VP (from depth >10 km to a maximum velocity of 7.6 km s 1 , Supplementary Table 4). Arcs with no P-wave velocity data are represented as grey asterisks and their VP values are from the correlation equation in Fig. 4a. Uncertaintie ...
Geological Society of America Bulletin
... and stopped at ca. 15 Ma, while remaining prolific toward the west (Fig. 1, inset). Late Cretaceous and younger magmatism resulted from north-dipping subduction that is interpreted to have started at 66 Ma along the western edge of the Caribbean plate, defining the time when the Caribbean and Farall ...
... and stopped at ca. 15 Ma, while remaining prolific toward the west (Fig. 1, inset). Late Cretaceous and younger magmatism resulted from north-dipping subduction that is interpreted to have started at 66 Ma along the western edge of the Caribbean plate, defining the time when the Caribbean and Farall ...
The Cretaceous and Cenozoic tectonic evolution of
... The 1970s also heralded the first regional plate reconstructions that incorporated the western Pacific plate boundaries (Hilde et al., 1977; Weissel et al., 1978) and the origin and evolution of the para-autochthonous Sula Spur (AudleyCharles et al., 1979; Norvick, 1979) interacting with the allocht ...
... The 1970s also heralded the first regional plate reconstructions that incorporated the western Pacific plate boundaries (Hilde et al., 1977; Weissel et al., 1978) and the origin and evolution of the para-autochthonous Sula Spur (AudleyCharles et al., 1979; Norvick, 1979) interacting with the allocht ...
Stratigraphic Framework of the
... Eocene to early Miocene time, and was followed after a brief hiatus by the Aleutian volcanic arc, which began its history during the late Miocene and has been active to the present. Most post-Eocene sedimentary rocks, with the exception of the Bear Lake Formation, were formed from detritus derived f ...
... Eocene to early Miocene time, and was followed after a brief hiatus by the Aleutian volcanic arc, which began its history during the late Miocene and has been active to the present. Most post-Eocene sedimentary rocks, with the exception of the Bear Lake Formation, were formed from detritus derived f ...
PDF
... The Neoproterozoic Era (Fig. 1) is when Earth and life on it began to appear modern. This was when the first complex animals developed, ice ages became common, and the atmosphere became rich with oxygen. The great Pacific Ocean basin formed, alongside the Atlantic Ocean's ancestor Iapetus. Some of t ...
... The Neoproterozoic Era (Fig. 1) is when Earth and life on it began to appear modern. This was when the first complex animals developed, ice ages became common, and the atmosphere became rich with oxygen. The great Pacific Ocean basin formed, alongside the Atlantic Ocean's ancestor Iapetus. Some of t ...
Convection in a partially molten metasedimentary crust? Insights
... granitic dikes have been observed in the schlieren migmatites or metasedimentary unit supports the conclusion that most melt was trapped in the source. The high CaO content in the biotite + amphibole–bearing S-type granitoids above, south of the migmatite region (Fig. 1B) and its ferromagnesian-rich ...
... granitic dikes have been observed in the schlieren migmatites or metasedimentary unit supports the conclusion that most melt was trapped in the source. The high CaO content in the biotite + amphibole–bearing S-type granitoids above, south of the migmatite region (Fig. 1B) and its ferromagnesian-rich ...
29. Sulfur Isotope Ratios of Leg 126 Igneous Rocks
... At Site 793 igneous rocks were encountered both at shallow depths (600 m below seafloor [mbsf]) as an olivine diabase sill and forming basement at 1400 mbsf. Olivine phenocrysts and interstitial glass are always altered to smectite in the olivine diabase sill but the other minerals are fresh. The su ...
... At Site 793 igneous rocks were encountered both at shallow depths (600 m below seafloor [mbsf]) as an olivine diabase sill and forming basement at 1400 mbsf. Olivine phenocrysts and interstitial glass are always altered to smectite in the olivine diabase sill but the other minerals are fresh. The su ...
Technical Report on the Thule Copper – Iron
... many of the copper prospects on the Property have been intermittently explored as early as the 1930's. The most important discovery to date has been the past producing Craigmont CopperIron mine located in the central part of the claim holdings. The former mine (the “Craigmont Mine”) was operated by ...
... many of the copper prospects on the Property have been intermittently explored as early as the 1930's. The most important discovery to date has been the past producing Craigmont CopperIron mine located in the central part of the claim holdings. The former mine (the “Craigmont Mine”) was operated by ...
Text
... Na-rich granitoids of the trondhjemite–tonalite–granodiorite (TTG) rock suite that are considered to be derived from the partial melting of metabasic source regions (e.g. Barker & Arth, 1976; Rapp et al., 1991; Rapp & Watson, 1995; Martin, 1999; Clemens et al., 2006; Moyen & Stevens, 2006; Nutman et ...
... Na-rich granitoids of the trondhjemite–tonalite–granodiorite (TTG) rock suite that are considered to be derived from the partial melting of metabasic source regions (e.g. Barker & Arth, 1976; Rapp et al., 1991; Rapp & Watson, 1995; Martin, 1999; Clemens et al., 2006; Moyen & Stevens, 2006; Nutman et ...
Study Guide
... 4. formed when heat, pressure, or fluids act on other types of rock and affect their composition ...
... 4. formed when heat, pressure, or fluids act on other types of rock and affect their composition ...
34 - School of Ocean and Earth Science and Technology
... Archean “nuclei.” Large areas of the continents are >1 Ga, so by about 1 Ga much of the crust had been formed. ...
... Archean “nuclei.” Large areas of the continents are >1 Ga, so by about 1 Ga much of the crust had been formed. ...
The West Philippine Basin: An Eocene to early Oligocene back arc
... Received 7 December 2001; revised 15 June 2002; accepted 2 July 2002; published 3 December 2002. ...
... Received 7 December 2001; revised 15 June 2002; accepted 2 July 2002; published 3 December 2002. ...
composition of biotite from granitic rocks
... with an electron microprobe (wavelength dispersion) for major elements and by 57Fe Mössbauer spectroscopy. We sampled a wide variety of rock types, ranging from gabbro, diorite, syenite to granite, but by far mostly granitic (sensu lato). The most pronounced variations are in total Al contents and F ...
... with an electron microprobe (wavelength dispersion) for major elements and by 57Fe Mössbauer spectroscopy. We sampled a wide variety of rock types, ranging from gabbro, diorite, syenite to granite, but by far mostly granitic (sensu lato). The most pronounced variations are in total Al contents and F ...
Presentation - Copernicus.org
... varies from basic rocks through basic and alkaline-alkaline to alkaline-ultramafic. Power dykes varies from 0,5-10m up to 90 m, length - from 5-15 m to 140 km. The orientation of the bulk of dykes coincides with the direction of the major structural and tectonic elements of the region. dykes are oft ...
... varies from basic rocks through basic and alkaline-alkaline to alkaline-ultramafic. Power dykes varies from 0,5-10m up to 90 m, length - from 5-15 m to 140 km. The orientation of the bulk of dykes coincides with the direction of the major structural and tectonic elements of the region. dykes are oft ...
Geology of Great Britain
The geology of Great Britain is renowned for its diversity. As a result of its eventful geological history, Great Britain shows a rich variety of landscapes across the constituent countries of England, Wales and Scotland. Rocks of almost all geological ages are represented at outcrop, from the Archaean onwards.