the complex tectonic events and their influence on formation
... Continuous limestone Sin Chai, Son La and Moc Chau plateaus reaching elevations up to 1500-1700 m a.s.l. spread along the Da River from the Chinese border to the South China Sea coast. Narrow canyons or very deep river valleys separate the plateaus and ridges. These Sin Chai, Son La, and Moc Chau pl ...
... Continuous limestone Sin Chai, Son La and Moc Chau plateaus reaching elevations up to 1500-1700 m a.s.l. spread along the Da River from the Chinese border to the South China Sea coast. Narrow canyons or very deep river valleys separate the plateaus and ridges. These Sin Chai, Son La, and Moc Chau pl ...
Post-Paleozoic activity
... Rocks within these basins compose the Newark Supergroup (Fig. 4; see discussions later in this chapter by Olsen and by McHone and Puffer). In North America the Newark Supergroup is a synrift unit that consists primarily of gray-to-black siltstones and shales, red-brown mudstones, petromict conglomer ...
... Rocks within these basins compose the Newark Supergroup (Fig. 4; see discussions later in this chapter by Olsen and by McHone and Puffer). In North America the Newark Supergroup is a synrift unit that consists primarily of gray-to-black siltstones and shales, red-brown mudstones, petromict conglomer ...
Electromagnetic images of a volcanic zone
... old. This belt appears to be the result of continental rifting (Souther, 1992). (3) The Anahim belt, which extends in an east—west direction across western British Columbia at about 52°N,includes about 30 Quaternary volcanoes of mainly basaltic composition. This belt may be the product of progressiv ...
... old. This belt appears to be the result of continental rifting (Souther, 1992). (3) The Anahim belt, which extends in an east—west direction across western British Columbia at about 52°N,includes about 30 Quaternary volcanoes of mainly basaltic composition. This belt may be the product of progressiv ...
thermal conductivity of rocks and minerals
... the special conditions prevailing at their formation, deposition, or metamorphism: sediments, volcanics, plutonits, and metamorphics. In each group we study statistical quantities (such as histograms, median, mean, and standard deviation) and investigate the variation of thermal conductivity with th ...
... the special conditions prevailing at their formation, deposition, or metamorphism: sediments, volcanics, plutonits, and metamorphics. In each group we study statistical quantities (such as histograms, median, mean, and standard deviation) and investigate the variation of thermal conductivity with th ...
15. Electrical Resistivity of Basalts from DSDP Leg 26
... rapidly with increasing temperature so the lower seafloor resistivity may be associated with higher temperatures, compared to the same depth beneath continents. The higher temperatures are required by the similar surface-heat flow and the higher radioactive heat production in continental crustal roc ...
... rapidly with increasing temperature so the lower seafloor resistivity may be associated with higher temperatures, compared to the same depth beneath continents. The higher temperatures are required by the similar surface-heat flow and the higher radioactive heat production in continental crustal roc ...
bedrock geology of the piedmont of delaware and adjacent
... This report accompanies a new map that revises the original bedrock geologic maps of the Delaware Piedmont compiled by Woodruff and Thompson and published by the Delaware Geological Survey (DGS) in 1972 and 1975. Combined detailed mapping, petrography, geochemistry, and U-Pb geochronology have allow ...
... This report accompanies a new map that revises the original bedrock geologic maps of the Delaware Piedmont compiled by Woodruff and Thompson and published by the Delaware Geological Survey (DGS) in 1972 and 1975. Combined detailed mapping, petrography, geochemistry, and U-Pb geochronology have allow ...
~her~o-mechanical ~od~~~ing of arc
... conform to the adopted geometry (Fig. 2) and are not included in this study. The number of heat flow measurements that have been used to calculate the average values, given in Table 1, ranges from 9 (South America) to 15 (northeast Honshu). For an error of 12 mW m-2 (which is likely to be a high est ...
... conform to the adopted geometry (Fig. 2) and are not included in this study. The number of heat flow measurements that have been used to calculate the average values, given in Table 1, ranges from 9 (South America) to 15 (northeast Honshu). For an error of 12 mW m-2 (which is likely to be a high est ...
Newly identi¢ed segments of the Paci¢c^Australia plate boundary
... The North Fiji transform zone, a 1500 km long and 200 km wide transform segment of the Pacific^Australia plate boundary, is one of the major transform fault systems of the Earth. New data collected during the ALAUFI cruise (March 2000) on board the R/V L'Atalante make it possible to define more accu ...
... The North Fiji transform zone, a 1500 km long and 200 km wide transform segment of the Pacific^Australia plate boundary, is one of the major transform fault systems of the Earth. New data collected during the ALAUFI cruise (March 2000) on board the R/V L'Atalante make it possible to define more accu ...
Spring 2009 Showcase Abstracts
... Intraplate crustal faulting is a result of active tectonic motion in the Pacific Northwest. Seismic analysis indicates that fault depths can extend 15 km, or deeper, into the earth’s crust. Unlike Cascadia megathrust slip events, these types of structures rupture quite frequently, usually with low m ...
... Intraplate crustal faulting is a result of active tectonic motion in the Pacific Northwest. Seismic analysis indicates that fault depths can extend 15 km, or deeper, into the earth’s crust. Unlike Cascadia megathrust slip events, these types of structures rupture quite frequently, usually with low m ...
Geology of Northern California Geolo
... The famous San Andreas fault system developed as a consequence of the transform plate boundary between the North America and the Pacific plates. The geologic setting of modern northern California is thus influenced by two different kinds of boundaries between the North American and oceanic plates to ...
... The famous San Andreas fault system developed as a consequence of the transform plate boundary between the North America and the Pacific plates. The geologic setting of modern northern California is thus influenced by two different kinds of boundaries between the North American and oceanic plates to ...
Satellite gravity anomalies and crustal features of the
... Profile 4 (Figure 5 a) clearly depicts the deformed basement and the overlying reflectors of the sequences against high-angle faults overlain by parallel reflectors of the top sequence in the south. They are identified as the two deformed crustal blocks that are noted (Figure 3) with squares and num ...
... Profile 4 (Figure 5 a) clearly depicts the deformed basement and the overlying reflectors of the sequences against high-angle faults overlain by parallel reflectors of the top sequence in the south. They are identified as the two deformed crustal blocks that are noted (Figure 3) with squares and num ...
characterization and reconstruction of the tea cup porphyry system
... overlain by approximately one km of dominantly siliciclastic sedimentary rocks of the Apache Group and Troy Quartzite. Near the time of deposition of the Troy Quartzite, the Proterozoic sequence and underlying crystalline rocks were intruded by diabase sheets and sills, dated at ~1.1 Ga (Shride, 196 ...
... overlain by approximately one km of dominantly siliciclastic sedimentary rocks of the Apache Group and Troy Quartzite. Near the time of deposition of the Troy Quartzite, the Proterozoic sequence and underlying crystalline rocks were intruded by diabase sheets and sills, dated at ~1.1 Ga (Shride, 196 ...
Subduction cycles under western North America during the
... to test and quantify these concepts. Plate motions in the northeast Pacific and the rates of convergence of these plates with the North American plate during Cretaceous and Tertiary time have been studied in more detail than anywhere else in the world. Radiometric ages for tens of thousands of rocks ...
... to test and quantify these concepts. Plate motions in the northeast Pacific and the rates of convergence of these plates with the North American plate during Cretaceous and Tertiary time have been studied in more detail than anywhere else in the world. Radiometric ages for tens of thousands of rocks ...
JDFfaulting
... et al., 2004), strike-slip and normal faulting have both been suggested for the Gorda and ...
... et al., 2004), strike-slip and normal faulting have both been suggested for the Gorda and ...
PDF format - gemoc - Macquarie University
... and Ellis 1996). Such melts might be trapped during a later stage of core formation when sulfide melts drained to the core, percolating through a solidified perovskite layer, whereas the molten upper mantle was cleared of all metal (Ballhaus and Ellis 1996). We suggest a similar origin for the Ni-Co ...
... and Ellis 1996). Such melts might be trapped during a later stage of core formation when sulfide melts drained to the core, percolating through a solidified perovskite layer, whereas the molten upper mantle was cleared of all metal (Ballhaus and Ellis 1996). We suggest a similar origin for the Ni-Co ...
The South-east African margin and its marine basins and ridge
... model is applied. Thus the location of this transition can be shifted by more than 300 km, which has a profound consequence for the refit of Gondwana. Secondly, the sea-floor anomalies only go back to 155 Ma, and the initial rifting took place at about 180 Ma. Consequently the refit proposals depend ...
... model is applied. Thus the location of this transition can be shifted by more than 300 km, which has a profound consequence for the refit of Gondwana. Secondly, the sea-floor anomalies only go back to 155 Ma, and the initial rifting took place at about 180 Ma. Consequently the refit proposals depend ...
Shashemene subsheet 0738_D3
... interpreted in terms of layer parameters (depth and resistivity) using the IPI2WIN Version 3.1.2c software, which helps provide a the best fit of observed and calculated curves and mapinfo software. Thin sections for petrographic classification of rocks were prepared in the GSE laboratory in Addis A ...
... interpreted in terms of layer parameters (depth and resistivity) using the IPI2WIN Version 3.1.2c software, which helps provide a the best fit of observed and calculated curves and mapinfo software. Thin sections for petrographic classification of rocks were prepared in the GSE laboratory in Addis A ...
2D finite element modeling
... mechanic properties are applied to the Late Cretaceous accreted sediments of being poorly, half and well consolidated (Table +). The boundary conditions of models B+, B, and B- are the same as each other. The left-side wall (OA) of the accretionary prism is horizontally constrained but vertically fr ...
... mechanic properties are applied to the Late Cretaceous accreted sediments of being poorly, half and well consolidated (Table +). The boundary conditions of models B+, B, and B- are the same as each other. The left-side wall (OA) of the accretionary prism is horizontally constrained but vertically fr ...
GEOLOGY, ORE DEPOSITS, AND MINERAL POTENTIAL OF THE
... and clastic sedimentary rocks of Cretaceous and Tertiary age. ...
... and clastic sedimentary rocks of Cretaceous and Tertiary age. ...
Tectonic history of the Chihuahua trough, Mexico
... a relatively passive margin of the North American craton. Cambrian and Ordovician rocks include basal transgressive sandstones that reflect a general northeastern advance of seas onto North America. The major event during the early Paleozoic was a change in the boundary of the North American craton ...
... a relatively passive margin of the North American craton. Cambrian and Ordovician rocks include basal transgressive sandstones that reflect a general northeastern advance of seas onto North America. The major event during the early Paleozoic was a change in the boundary of the North American craton ...
- Free Documents
... waves S waves impart vibrations perpendicular to their direction of travel. P waves are the first to arrive and be recorded at geophysical research stations throughout the world. The waves are further differentiated by the kinds of motions they impart to rock particles. Earthquakes can release energ ...
... waves S waves impart vibrations perpendicular to their direction of travel. P waves are the first to arrive and be recorded at geophysical research stations throughout the world. The waves are further differentiated by the kinds of motions they impart to rock particles. Earthquakes can release energ ...
The uptake of Ti in experimentally grown, hydrothermal quartz
... to the east of Bentong- Raub Suture Zone [1], a major terrane boundary that marks the collision of Sibumasu and East Malaya blocks at the Triassic Indosinian Orogeny. Peninsular Malaysia is situated on two tectono-stratigraphic continental terranes, namely Sibumasu and East Malaya blocks. Rifting of ...
... to the east of Bentong- Raub Suture Zone [1], a major terrane boundary that marks the collision of Sibumasu and East Malaya blocks at the Triassic Indosinian Orogeny. Peninsular Malaysia is situated on two tectono-stratigraphic continental terranes, namely Sibumasu and East Malaya blocks. Rifting of ...
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 ...
bulletin of marine science
... Paleocene). The ages of the rocks involved in these thermal events are unknown. They reported one date of 180 m.y. (Early Jurassic) on a granodiorite from Las Vilas Province (K-Ar, whole rock) and remarked that its significance is not understood in terms of the known history of Cuba. The oldest rock ...
... Paleocene). The ages of the rocks involved in these thermal events are unknown. They reported one date of 180 m.y. (Early Jurassic) on a granodiorite from Las Vilas Province (K-Ar, whole rock) and remarked that its significance is not understood in terms of the known history of Cuba. The oldest rock ...
The late Paleozoic to Cainozoic intraplate deformation in
... North of the South Palmyra fault zone the Pre-Mesozoic basement drops sharply from 5000 m depth on the Rutbah uplift to 10 000 m in the Al-Daww depression in the southern Palmyrides (Brew et al., 1997). In the north the zone of deep Mesozoic-Cainozoic subsidence (southern Palmyrides) is separated fr ...
... North of the South Palmyra fault zone the Pre-Mesozoic basement drops sharply from 5000 m depth on the Rutbah uplift to 10 000 m in the Al-Daww depression in the southern Palmyrides (Brew et al., 1997). In the north the zone of deep Mesozoic-Cainozoic subsidence (southern Palmyrides) is separated fr ...
Algoman orogeny
The Algoman orogeny, known as the Kenoran orogeny in Canada, was an episode of mountain-building (orogeny) during the Late Archean Eon that involved repeated episodes of continental collisions, compressions and subductions. The Superior province and the Minnesota River Valley terrane collided about 2,700 to 2,500 million years ago. The collision folded the Earth's crust and produced enough heat and pressure to metamorphose the rock. Blocks were added to the Superior province along a 1,200 km (750 mi) boundary that stretches from present-day eastern South Dakota into the Lake Huron area. The Algoman orogeny brought the Archaen Eon to a close, about 2,500 million years ago; it lasted less than 100 million years and marks a major change in the development of the earth’s crust.The Canadian shield contains belts of metavolcanic and metasedimentary rocks formed by the action of metamorphism on volcanic and sedimentary rock. The areas between individual belts consist of granites or granitic gneisses that form fault zones. These two types of belts can be seen in the Wabigoon, Quetico and Wawa subprovinces; the Wabigoon and Wawa are of volcanic origin and the Quetico is of sedimentary origin. These three subprovinces lie linearly in southwestern- to northeastern-oriented belts about 140 km (90 mi) wide on the southern portion of the Superior Province.The Slave province and portions of the Nain province were also affected. Between about 2,000 and 1,700 million years ago these combined with the Sask and Wyoming cratons to form the first supercontinent, the Kenorland supercontinent.