Age and petrogenesis of the Tinn granite, Telemark, South
... grains (core-rim pair n446-01a/b) is reversely discordant; the other grains range from near-concordant (1 % discordant) to strongly discordant (>30% discordant). When all points are plotted in a concordia diagram, a majority of points cluster along a lead-loss line from a Mid Proterozoic upper inter ...
... grains (core-rim pair n446-01a/b) is reversely discordant; the other grains range from near-concordant (1 % discordant) to strongly discordant (>30% discordant). When all points are plotted in a concordia diagram, a majority of points cluster along a lead-loss line from a Mid Proterozoic upper inter ...
Catastrophic Granite Formation Rapid Melting of
... discontinuous belt of batholiths that circle the Pacific Ocean basin. For example, granite batholiths are found all through the coastal ranges along the west coast of South America and extend northward from the Sierra Nevada through Idaho and Montana, western Canada, and into Alaska. The granite plut ...
... discontinuous belt of batholiths that circle the Pacific Ocean basin. For example, granite batholiths are found all through the coastal ranges along the west coast of South America and extend northward from the Sierra Nevada through Idaho and Montana, western Canada, and into Alaska. The granite plut ...
Sedimentary record of the tectonic growth of a collisional continental
... to identify and study because their strata may be deformed, metamorphosed, and/or eroded during the final stages of collision. If preserved, however, the stratigraphy and deformation of collisional basins provide a record of processes associated with the growth of continents through suturing of isla ...
... to identify and study because their strata may be deformed, metamorphosed, and/or eroded during the final stages of collision. If preserved, however, the stratigraphy and deformation of collisional basins provide a record of processes associated with the growth of continents through suturing of isla ...
Research Article
... rocks, deformation structures caused by three different phases ( D l , D2 and D3) of ductile deformation have been recognized (Okudaira et al. 1993, 1995). Deformation structures resulting from D1 and D3 are commonly observed, while the occurrence of the D2 structure is limited. In all the rocks, D1 ...
... rocks, deformation structures caused by three different phases ( D l , D2 and D3) of ductile deformation have been recognized (Okudaira et al. 1993, 1995). Deformation structures resulting from D1 and D3 are commonly observed, while the occurrence of the D2 structure is limited. In all the rocks, D1 ...
The detrital record of orogenesis: A review of approaches and
... The Himalaya formed when the Tethys ocean, which had been subducting beneath Eurasia, closed, and India and Asia collided. Microplates and island arcs are sandwiched between the two continents along the line of collision. The eastern and western lateral margins of the India–Asia contact zone are tra ...
... The Himalaya formed when the Tethys ocean, which had been subducting beneath Eurasia, closed, and India and Asia collided. Microplates and island arcs are sandwiched between the two continents along the line of collision. The eastern and western lateral margins of the India–Asia contact zone are tra ...
Georgian Bay Geological Synthesis, Grenville Province: Explanatory
... Van Schmus and Zeitz 1986). Cutting this province is a northwesterly trending belt of gravity and aeromagnetic anomalies interpreted to represent the buried portion of the 1100 Ma Midcontinent Rift (Sutcliffe 1991). The Grenville Front marks the northwest limit of penetrative Grenvillian metamorphis ...
... Van Schmus and Zeitz 1986). Cutting this province is a northwesterly trending belt of gravity and aeromagnetic anomalies interpreted to represent the buried portion of the 1100 Ma Midcontinent Rift (Sutcliffe 1991). The Grenville Front marks the northwest limit of penetrative Grenvillian metamorphis ...
2. Neogene Tectonic Evolution of the New Hebrides Island Arc
... Evolution of the New Hebrides Island Arc occurred primarily during the Neogene, when, as part of the Vitiaz Arc it was ripped away from Fiji and Tonga and rotated clockwise (westward) to its present position. A combination of subduction polarity reversal, backarc spreading, and ridge-arc collision i ...
... Evolution of the New Hebrides Island Arc occurred primarily during the Neogene, when, as part of the Vitiaz Arc it was ripped away from Fiji and Tonga and rotated clockwise (westward) to its present position. A combination of subduction polarity reversal, backarc spreading, and ridge-arc collision i ...
Abstract Volume
... Orogenic Belt, Northwestern China Zilong LI, Yinqi LI, Hanlin CHEN, M Santosh, Wenjiao XIAO and Huihui WANG .............................................27 Geochemistry and SHRIMP Zircon Geochronology of the Neoproterozoic Suprasubduction Zone Ophiolite at Hongseong, South Korea: Implications for th ...
... Orogenic Belt, Northwestern China Zilong LI, Yinqi LI, Hanlin CHEN, M Santosh, Wenjiao XIAO and Huihui WANG .............................................27 Geochemistry and SHRIMP Zircon Geochronology of the Neoproterozoic Suprasubduction Zone Ophiolite at Hongseong, South Korea: Implications for th ...
Towards a Creationist Explanation of Regional
... The metasedimentary sheaths surrounding stratiform sulfide orebodies have facilitated the study of regional metamorphic processes on a much smaller scale. Such orebodies were produced by hydrothermal waters disgorging both sulfides and a variety of other minerals and chemicals onto the sea-floor, where ...
... The metasedimentary sheaths surrounding stratiform sulfide orebodies have facilitated the study of regional metamorphic processes on a much smaller scale. Such orebodies were produced by hydrothermal waters disgorging both sulfides and a variety of other minerals and chemicals onto the sea-floor, where ...
Generation of new continental crust by sublithospheric silicic
... 2. Taylor's andesite model: An overview on the origin of upper and lower continental crusts Besides the intriguing andesite average composition, an outstanding feature of the Earth's continental crust is the dichotomy between an upper layer of broadly granodioritic composition (SiO2 = 68 wt.%; MgO= ...
... 2. Taylor's andesite model: An overview on the origin of upper and lower continental crusts Besides the intriguing andesite average composition, an outstanding feature of the Earth's continental crust is the dichotomy between an upper layer of broadly granodioritic composition (SiO2 = 68 wt.%; MgO= ...
The Ingalls ophiolite complex, central Cascades, Washington
... Seafloor rifting and spreading within suprasubduction zones occurs in the western Pacific island arcs and in the East Scotia Sea in the southern Atlantic (e.g., Stern, 2002; Hawkins, 2003; Livermore, 2003; Martinez and Taylor, 2003). Seafloor spreading within these suprasubduction zones can start ei ...
... Seafloor rifting and spreading within suprasubduction zones occurs in the western Pacific island arcs and in the East Scotia Sea in the southern Atlantic (e.g., Stern, 2002; Hawkins, 2003; Livermore, 2003; Martinez and Taylor, 2003). Seafloor spreading within these suprasubduction zones can start ei ...
Geology and petrology of the felsic intrusions in the
... Opleiding Master of Science in de geologie ...
... Opleiding Master of Science in de geologie ...
Hewitt/Lyons/Suchocki/Yeh, Conceptual Integrated Science
... • They contain evidence of past environments. • They often contain fossils. Copyright © 2007 Pearson Education, Inc., publishing as Pearson Addison-Wesley ...
... • They contain evidence of past environments. • They often contain fossils. Copyright © 2007 Pearson Education, Inc., publishing as Pearson Addison-Wesley ...
Structure and geological evolution of the bedrock of
... site. The area described is covered by four 1: 100 000 scale geological map sheets, published by the Geological Survey of Finland, which, together with low-altitude aeromagnetic maps, provide the basis for a new 1:250 000 geological map compilation. This shows that the bedrock of southern Satakunta ...
... site. The area described is covered by four 1: 100 000 scale geological map sheets, published by the Geological Survey of Finland, which, together with low-altitude aeromagnetic maps, provide the basis for a new 1:250 000 geological map compilation. This shows that the bedrock of southern Satakunta ...
early evolution of the North American Cordillera Baltican and
... originated from three distinct regions in Palaeozoic time: the western peri-Laurentian margin, western (Asian) Panthalassa, and the northern Caledonides –Siberia. A review of geological history, fossil and provenance data for the Caledonian– Siberian terranes suggests that they probably occupied an ...
... originated from three distinct regions in Palaeozoic time: the western peri-Laurentian margin, western (Asian) Panthalassa, and the northern Caledonides –Siberia. A review of geological history, fossil and provenance data for the Caledonian– Siberian terranes suggests that they probably occupied an ...
petrology and isotope systematics of magma mushes
... REGIONAL SETTING These bodies are emplaced into the Borborema tectonic province, a complex structural mosaic of linear metasedimentary fold belts separated by massifs of much older, previously deformed gneissic basement (Almeida et aI. 1981). The final major orogeny in this area was the Brasiliano C ...
... REGIONAL SETTING These bodies are emplaced into the Borborema tectonic province, a complex structural mosaic of linear metasedimentary fold belts separated by massifs of much older, previously deformed gneissic basement (Almeida et aI. 1981). The final major orogeny in this area was the Brasiliano C ...
Early Paleozoic Tectonic and Thermomechanical
... Coesite- and diamond-bearing ultrahigh-pressure (UHP) metamorphic rocks represent continental materials that were once subducted to depths of >90 km. Identifying how these rocks were subsequently returned to Earth’s surface has been a major challenge. Opinions on this matter vary widely, ranging fro ...
... Coesite- and diamond-bearing ultrahigh-pressure (UHP) metamorphic rocks represent continental materials that were once subducted to depths of >90 km. Identifying how these rocks were subsequently returned to Earth’s surface has been a major challenge. Opinions on this matter vary widely, ranging fro ...
Unit 1 The Ocean Basins
... either young, created in the Cenozoic era (0 – 65 Ma); or old, created prior to the Cenozoic era (64 – 3800 Ma). Turn off and collapse the Detailed Ocean-Floor Age layer. ...
... either young, created in the Cenozoic era (0 – 65 Ma); or old, created prior to the Cenozoic era (64 – 3800 Ma). Turn off and collapse the Detailed Ocean-Floor Age layer. ...
Classification of Alberta Landforms
... result from "synchronous and successive processes acting in various combinations over time" (Campbell 1997). Where there is a combination of processes in action, Hebrank (ibid.) assigned a feature to the process that was the most critical or important to its development. As much as possible, that ap ...
... result from "synchronous and successive processes acting in various combinations over time" (Campbell 1997). Where there is a combination of processes in action, Hebrank (ibid.) assigned a feature to the process that was the most critical or important to its development. As much as possible, that ap ...
A Geochemical Study of Crustal Plutonic Rocks from the Southern
... I would like to express my heartfelt thanks to my advisor and mentor, Dr. Rosemary Hickey-Vargas, who guided, motivated, and inspired me all these years; my committee members for their revisions, suggestions and tolerance of my penchant for waiting until the eleventh hour; the NSF grant that funded ...
... I would like to express my heartfelt thanks to my advisor and mentor, Dr. Rosemary Hickey-Vargas, who guided, motivated, and inspired me all these years; my committee members for their revisions, suggestions and tolerance of my penchant for waiting until the eleventh hour; the NSF grant that funded ...
bedrock geology of the piedmont of delaware and adjacent
... The update of earlier work and mapping of new units is important not only to geologists, but also to hydrologists who wish to understand the distribution of water resources, to engineers who need bedrock information during construction of roads and buildings, to government officials and ...
... The update of earlier work and mapping of new units is important not only to geologists, but also to hydrologists who wish to understand the distribution of water resources, to engineers who need bedrock information during construction of roads and buildings, to government officials and ...
Relations between sedimentary basins and petroleum
... Ontong-Java Plateau in the south-western Pacific (LIPs, Large Igneous Provinces). Their origin is not clear, either as regards the depth of their source or the dynamics of the process. There are also magmatic events which describe linear tracks over the Earth’s surface, both subsea and subaerial, wh ...
... Ontong-Java Plateau in the south-western Pacific (LIPs, Large Igneous Provinces). Their origin is not clear, either as regards the depth of their source or the dynamics of the process. There are also magmatic events which describe linear tracks over the Earth’s surface, both subsea and subaerial, wh ...
47. the ocean/continent transition beneath the iberia abyssal plain
... use the same definition of the ocean/continent transition as Whitmarsh and Miles [1995], that is, that part of the lithosphere which includes the crust between the thinned continental crust characterized by tilted fault blocks, and the first oceanic crust formed by seafloor spreading.) ...
... use the same definition of the ocean/continent transition as Whitmarsh and Miles [1995], that is, that part of the lithosphere which includes the crust between the thinned continental crust characterized by tilted fault blocks, and the first oceanic crust formed by seafloor spreading.) ...
Metamorphic Facies
... occuring to SE of it. High P-T belt consists of zeolite facies to blueschist / greenschist facies and some amphibolite rocks. Miyashiro also noted paired metamorphic belts around the entire Pacific Rim. ...
... occuring to SE of it. High P-T belt consists of zeolite facies to blueschist / greenschist facies and some amphibolite rocks. Miyashiro also noted paired metamorphic belts around the entire Pacific Rim. ...
Mineralogy and Petrology of Tertiary
... imbricate thrust zone (Armstrong and Cressman, 1963). The distribution of lavas within Caribou County is shown in Figure 2. In parts of the Blackfoot, Willow Creek, and Gem Valley lava fields, the flows are well-exposed along the extensive northwest-southeast scarp system which runs through the area ...
... imbricate thrust zone (Armstrong and Cressman, 1963). The distribution of lavas within Caribou County is shown in Figure 2. In parts of the Blackfoot, Willow Creek, and Gem Valley lava fields, the flows are well-exposed along the extensive northwest-southeast scarp system which runs through the area ...
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.