2012_sanpietroburgo - Earth
... marks the studied area. The studied region, between 29° and 34° S, corresponds to a complex surface setting made up of the Principal Cordillera and Frontal Cordillera, which form the main part of the Andes, and, eastward, of the Precordillera, which is a thin-skinned thrust and fold belt, and Sierra ...
... marks the studied area. The studied region, between 29° and 34° S, corresponds to a complex surface setting made up of the Principal Cordillera and Frontal Cordillera, which form the main part of the Andes, and, eastward, of the Precordillera, which is a thin-skinned thrust and fold belt, and Sierra ...
modern and ancient incompatible element-poor adakite
... Daniel Sellés, Michael Dungan, & Carolina Rodríguez. Department of Mineralogy, Earth Sciences Section, University of Geneva, Switzerland [email protected] ...
... Daniel Sellés, Michael Dungan, & Carolina Rodríguez. Department of Mineralogy, Earth Sciences Section, University of Geneva, Switzerland [email protected] ...
Thrust systems: geometry and kinematics
... Field trip to Silverbell Mine this Saturday: 7:45 AM to 4 PM See me after class for information. (+1% extra credit) ...
... Field trip to Silverbell Mine this Saturday: 7:45 AM to 4 PM See me after class for information. (+1% extra credit) ...
wik ciółka
... wedge of Outer Carpathians. During the Priabonian and Rupelian, a prominent uplift was recorded in the Outer Carpathian basin. The Outer Carpathian remnant oceanic basins turned into foreland basins (Oszczypko, 1999). The Oligocene subsidence was accompanied by a progressive migration of axes of dep ...
... wedge of Outer Carpathians. During the Priabonian and Rupelian, a prominent uplift was recorded in the Outer Carpathian basin. The Outer Carpathian remnant oceanic basins turned into foreland basins (Oszczypko, 1999). The Oligocene subsidence was accompanied by a progressive migration of axes of dep ...
Lithospheric evolution of the Andean fold–thrust belt, Bolivia, and
... a young orogenic belt because of their high elevation and topography, rugged peaks little affected by erosion, and broad internally drained areas of low relief. The initial pulse of tectonism that constructed this topographic edifice is generally considered to be late Oligocene–early Miocene (25–30 ...
... a young orogenic belt because of their high elevation and topography, rugged peaks little affected by erosion, and broad internally drained areas of low relief. The initial pulse of tectonism that constructed this topographic edifice is generally considered to be late Oligocene–early Miocene (25–30 ...
Nevado de Longaví Volcano (Chilean Andes, 36.2 ˚S): adakitic
... The formation of adakites by partial melting of oceanic lithosphere is limited to regions where young, hot slabs are subducted. Adakitic melts also occur in continental arcs related to subduction of cold oceanic lithosphere, where they have been explained in terms of remelting of basaltic material u ...
... The formation of adakites by partial melting of oceanic lithosphere is limited to regions where young, hot slabs are subducted. Adakitic melts also occur in continental arcs related to subduction of cold oceanic lithosphere, where they have been explained in terms of remelting of basaltic material u ...
In-Situ Plate Tectonic Model of the Gulf of Mexico (GOM) and
... 4. Predicts low chance of reservoir. This prediction is illustrated by Cuba but not by Jamaica, as Palaeocene to Eocene non-volcanic sandstones with a strong lithological similarity to the neighbouring Nicaraguan Rise has been intersected. In fact, the presence of Eocene sand-rich fans of the Wilcox ...
... 4. Predicts low chance of reservoir. This prediction is illustrated by Cuba but not by Jamaica, as Palaeocene to Eocene non-volcanic sandstones with a strong lithological similarity to the neighbouring Nicaraguan Rise has been intersected. In fact, the presence of Eocene sand-rich fans of the Wilcox ...
Oceanography 101 Linda Khandro, MAT Homework 11: Dynamic
... • North Island rides atop the NW-moving Pacific Plate which is subducting beneath the Australian Plate. • South Island is mostly in the tear-apart (transform or strike slip) fault zone, but further the south the SE-moving Australian plate subducts beneath the Pacific Plate. • The climate is mild; wa ...
... • North Island rides atop the NW-moving Pacific Plate which is subducting beneath the Australian Plate. • South Island is mostly in the tear-apart (transform or strike slip) fault zone, but further the south the SE-moving Australian plate subducts beneath the Pacific Plate. • The climate is mild; wa ...
Structural controls on the emplacement of porphyry systems: the
... The Rio Blanco-Los Bronces district is part of a Tertiary magmatic arc which is characterized by the opening and subsequent inversion of an intra-arc volcano-tectonic basin, the Abanico Basin. In the district the transition between syn-extension and syn-inversion volcanic rocks is marked by progress ...
... The Rio Blanco-Los Bronces district is part of a Tertiary magmatic arc which is characterized by the opening and subsequent inversion of an intra-arc volcano-tectonic basin, the Abanico Basin. In the district the transition between syn-extension and syn-inversion volcanic rocks is marked by progress ...
Mountain Building
... the trend, or strike • Transform fault – Large strike-slip fault that cuts through the lithosphere – Often associated with plate boundaries ...
... the trend, or strike • Transform fault – Large strike-slip fault that cuts through the lithosphere – Often associated with plate boundaries ...
Trace element patterns show that Guatemala rocks
... wedge margin. Lithium abundances and isotopes have been measured on these rocks using MC-ICP-MS, to better understand the evolution of fluids and fluid exchange during subduction. Several lines of evidence suggest that the rocks were metasomatized in the subduction zone environment. Although the ec ...
... wedge margin. Lithium abundances and isotopes have been measured on these rocks using MC-ICP-MS, to better understand the evolution of fluids and fluid exchange during subduction. Several lines of evidence suggest that the rocks were metasomatized in the subduction zone environment. Although the ec ...
PNW Tectonic Block Model
... Orange areas, representing young volcanic rocks erupted in the last 2 million years, are more voluminous south of Mt. Rainier, when compared to the northern arc, where block motion compresses the volcanic arc. Northward motion of the Oregon coastal block squeezes western Washington (green) against C ...
... Orange areas, representing young volcanic rocks erupted in the last 2 million years, are more voluminous south of Mt. Rainier, when compared to the northern arc, where block motion compresses the volcanic arc. Northward motion of the Oregon coastal block squeezes western Washington (green) against C ...
Fore-arc basin
... Island arcs are of chains of volcanically active islands arranged in a curved arc An ocean trench occurs on the ocean-wards side Island arcs first develop on oceanic crust The crustal thickness in an arc is intermediate between oceanic and continental Volcanic activity begins abruptly at a Volcanic ...
... Island arcs are of chains of volcanically active islands arranged in a curved arc An ocean trench occurs on the ocean-wards side Island arcs first develop on oceanic crust The crustal thickness in an arc is intermediate between oceanic and continental Volcanic activity begins abruptly at a Volcanic ...
Forschungszentrum für marine
... Cold plates and hot melts International science team publishes new data about the history of the Pacific Ring of Fire 10 February 2017/Kiel. The movements of Earth’s tectonic plates shape the face of our planet. The sinking of one plate beneath another, known as subduction, causes volcanism and eart ...
... Cold plates and hot melts International science team publishes new data about the history of the Pacific Ring of Fire 10 February 2017/Kiel. The movements of Earth’s tectonic plates shape the face of our planet. The sinking of one plate beneath another, known as subduction, causes volcanism and eart ...
Evolution of the Helvetic Continental margin paper - RWTH
... Helveticum can be found in the northern Alpine mountain ranges where outcrops are present at the surface. The Helvetic nappes were detached from their former crystalline basement of Penninic origin and massively thrusted over the Infrahelvetic complex and the external massif of the Alps. In Switzerl ...
... Helveticum can be found in the northern Alpine mountain ranges where outcrops are present at the surface. The Helvetic nappes were detached from their former crystalline basement of Penninic origin and massively thrusted over the Infrahelvetic complex and the external massif of the Alps. In Switzerl ...
GSL abstract, K. H. James
... extension between the separating Americas. Its N60oW and N35oE tectonic fabric demonstrates internal integrity. The latter reflects reactivation of Palaeozoic (Appalachian) orogenesis. The former parallels major fractures of the western Central Atlantic and faults crossing North and South America an ...
... extension between the separating Americas. Its N60oW and N35oE tectonic fabric demonstrates internal integrity. The latter reflects reactivation of Palaeozoic (Appalachian) orogenesis. The former parallels major fractures of the western Central Atlantic and faults crossing North and South America an ...
Revised history of Izanagi-Pacific ridge subduction
... rapid motion, driven by net slab-pull force, from the northnorthwest [Otsuki, 1992], immediately prior to the proposed spreading cessation. Metamorphism of the Ryoke Belt in southern Japan has previously been attributed to Kula-Pacific ridge subduction at 85 Ma [Engebretson, et al., 1985], and but t ...
... rapid motion, driven by net slab-pull force, from the northnorthwest [Otsuki, 1992], immediately prior to the proposed spreading cessation. Metamorphism of the Ryoke Belt in southern Japan has previously been attributed to Kula-Pacific ridge subduction at 85 Ma [Engebretson, et al., 1985], and but t ...
pdf file - Pacific Northwest Geodetic Array
... there a geodetic signal related to possible variations in slab pull, interplate coupling, or Basin-Range mantle dynamics? What causes intermediate-depth seismicity in the slab - phase changes and dehydration embrittlement reactions in slab crust, slab pull, or both? Do the large earthquakes in the s ...
... there a geodetic signal related to possible variations in slab pull, interplate coupling, or Basin-Range mantle dynamics? What causes intermediate-depth seismicity in the slab - phase changes and dehydration embrittlement reactions in slab crust, slab pull, or both? Do the large earthquakes in the s ...
What aspects of the downgoing plate might be important in
... Dynamic regions of fluids, fluid flow, and overpressure Can host shallow slip and cause tsunami Impacted by sediments and structures on the subducting plate ...
... Dynamic regions of fluids, fluid flow, and overpressure Can host shallow slip and cause tsunami Impacted by sediments and structures on the subducting plate ...
Plate collision and mounting building separated by long periods of
... According to a popular scheme of orogenesis, superposition of thick nappe on continental crust results in concomitant mountain building. In many cases plate collision was not accompanied by mountain building which actually occurred 10-100 Myr later. Thus in East Carpathians 12 Ma ago thick nappe was ...
... According to a popular scheme of orogenesis, superposition of thick nappe on continental crust results in concomitant mountain building. In many cases plate collision was not accompanied by mountain building which actually occurred 10-100 Myr later. Thus in East Carpathians 12 Ma ago thick nappe was ...
10 UPLIFT, EROSION AND ROCK DEFORMATION
... regional-scale events associated with the tectonic regime of the NW Pacific and very local vertical displacements due to faulting and folding. The evidence for these movements is seen in near-surface geographical and geological features such as fault scarps, palaeo-erosion surfaces and river/marine ...
... regional-scale events associated with the tectonic regime of the NW Pacific and very local vertical displacements due to faulting and folding. The evidence for these movements is seen in near-surface geographical and geological features such as fault scarps, palaeo-erosion surfaces and river/marine ...
1.2 Billion Years Ago to 750 Million Years Ago Around 1.2 billion
... until the Carboniferous Period (320 million years ago) that reptiles were around. There are preserved rocks in Eastern Washington representing each of these times periods. It was during the Devonian period that the oceanic plate previously fixed to the continental margin, plunged underneath the cont ...
... until the Carboniferous Period (320 million years ago) that reptiles were around. There are preserved rocks in Eastern Washington representing each of these times periods. It was during the Devonian period that the oceanic plate previously fixed to the continental margin, plunged underneath the cont ...
Tectonic controls on the distribution of large
... No significant porphyry systems are known in western Indonesia. The subducting oceanic plate in this region comprises cold Eocene crust, while the thin lithosphere of SE Asia is also relatively cold. These factors suggest that the subducting oceanic plate never had time to heat up sufficiently to si ...
... No significant porphyry systems are known in western Indonesia. The subducting oceanic plate in this region comprises cold Eocene crust, while the thin lithosphere of SE Asia is also relatively cold. These factors suggest that the subducting oceanic plate never had time to heat up sufficiently to si ...
A Tectonic explanation of the May 12, 2008, Sichuan Earthquake
... large, curved strike-slip faults that guide the crustal flow around the corner. This “flow” is actually accomplished in jerks when earthquakes rupture these faults. Many of China’s largest, most destructive earthquakes occur here. ...
... large, curved strike-slip faults that guide the crustal flow around the corner. This “flow” is actually accomplished in jerks when earthquakes rupture these faults. Many of China’s largest, most destructive earthquakes occur here. ...