inv5_student
... neither created nor destroyed. In this investigation, you will locate oceanic and continental transform boundaries and study their history. You will: 1. Investigate an oceanic transform boundary, the Charlie-Gibbs Fracture zone, using earthquake and age of the ocean floor data. 2. Investigate a cont ...
... neither created nor destroyed. In this investigation, you will locate oceanic and continental transform boundaries and study their history. You will: 1. Investigate an oceanic transform boundary, the Charlie-Gibbs Fracture zone, using earthquake and age of the ocean floor data. 2. Investigate a cont ...
Eurasia spreading basin to Laptev Shelf transition: structural pattern
... Glebovsky et al. 2000) covers most of the Eurasia Basin. A welldetectable set of linear magnetic anomalies ranged from A24 to A0 in the central part of the basin loses its distinctiveness towards the Laptev Sea where the data coverage and resolution decrease. The magnetic field in the vicinity of th ...
... Glebovsky et al. 2000) covers most of the Eurasia Basin. A welldetectable set of linear magnetic anomalies ranged from A24 to A0 in the central part of the basin loses its distinctiveness towards the Laptev Sea where the data coverage and resolution decrease. The magnetic field in the vicinity of th ...
Chapter Four: Structural Geology
... commonly between vertical and 75 degrees northeastward, rarely southwestward. The trace of the zone is highly braided on a tine and coarse scale with many major and minor parallel subsidiary faults, splay faults, and large horses, such as the one between the Beresford splay and the main strand. The ...
... commonly between vertical and 75 degrees northeastward, rarely southwestward. The trace of the zone is highly braided on a tine and coarse scale with many major and minor parallel subsidiary faults, splay faults, and large horses, such as the one between the Beresford splay and the main strand. The ...
View Entire Bulletin - Ministry of Energy and Mines and Responsible
... Younger stratified rocks, ranging in age from Lower-Middle Jurassic to Recent, lie either in fault contact with Nicolastrata or overlie them unconformably. The most conspicuous ...
... Younger stratified rocks, ranging in age from Lower-Middle Jurassic to Recent, lie either in fault contact with Nicolastrata or overlie them unconformably. The most conspicuous ...
Satellite gravity anomalies and crustal features of the
... (Figure 2) was prepared for the CIOB area between 5°N to 10°S and 76° to 90°E from Geosat and ERS-1 satellite altimetry data17. Seismic reflection, gravity and bathymetric data collected in three polygons (S22-I to III) and along four regional profiles, 4, 7, 8 and 9 during the 22nd cruise of R/V Pr ...
... (Figure 2) was prepared for the CIOB area between 5°N to 10°S and 76° to 90°E from Geosat and ERS-1 satellite altimetry data17. Seismic reflection, gravity and bathymetric data collected in three polygons (S22-I to III) and along four regional profiles, 4, 7, 8 and 9 during the 22nd cruise of R/V Pr ...
1 - Assets - Cambridge - Cambridge University Press
... characteristics of sedimentary rocks are in themselves reason enough to study sedimentary rocks. In addition, many sedimentary rocks contain minerals and fossil fuels that have economic significance. Petroleum, natural gas, coal, salt, phosphorus, sulfur, iron and other metallic ores, and uranium ar ...
... characteristics of sedimentary rocks are in themselves reason enough to study sedimentary rocks. In addition, many sedimentary rocks contain minerals and fossil fuels that have economic significance. Petroleum, natural gas, coal, salt, phosphorus, sulfur, iron and other metallic ores, and uranium ar ...
Perspectives on the origin of plagiogranite in ophiolites from oxygen
... ophiolite settings, though large-scale intrusions are currently known only from ophiolites (e.g., Aldiss, 1981). Classic examples include decimeter-scale dikes to km-scale plagiogranite bodies in the northern Oman ophiolite associated with composite ‘late-intrusive complexes’ (e.g., Lippard et al., ...
... ophiolite settings, though large-scale intrusions are currently known only from ophiolites (e.g., Aldiss, 1981). Classic examples include decimeter-scale dikes to km-scale plagiogranite bodies in the northern Oman ophiolite associated with composite ‘late-intrusive complexes’ (e.g., Lippard et al., ...
2.01 Cosmochemical Estimates of Mantle Composition
... substantial radial mixing that must have occurred when the terrestrial planets formed. In current models of planet formation, the Earth is made by collisions of a hundred or more Moon- to Marssized embryos, small planets that formed within a million years from local feeding zones. The growth of the ...
... substantial radial mixing that must have occurred when the terrestrial planets formed. In current models of planet formation, the Earth is made by collisions of a hundred or more Moon- to Marssized embryos, small planets that formed within a million years from local feeding zones. The growth of the ...
Cr-Pyrope Garnets in the Lithospheric Mantle. I
... To learn more about lateral and temporal variations in the subcontinental lithosphere, we need tools for mapping mantle composition and structure over large areas. Xenolith suites in volcanic rocks can provide some of this information, but xenolith suites have major limitations for lithospheric mapp ...
... To learn more about lateral and temporal variations in the subcontinental lithosphere, we need tools for mapping mantle composition and structure over large areas. Xenolith suites in volcanic rocks can provide some of this information, but xenolith suites have major limitations for lithospheric mapp ...
Overview of Geologic Structures
... Associated with erosion and dissection of portions of the earth's crust that has been displaced and tilted along high-angle normal faults (in association with tensional stresses) ...
... Associated with erosion and dissection of portions of the earth's crust that has been displaced and tilted along high-angle normal faults (in association with tensional stresses) ...
as a PDF
... The modern Japanese Islands geographically comprise five island arcs: the Kurile, Northeast Japan, Izu-Bonin, Southwest Japan, and Ryukyu arcs, showing complex patterns common in the western Pacific. Four of these form segments of active island arcs between the Eurasian continent and the Pacific Oce ...
... The modern Japanese Islands geographically comprise five island arcs: the Kurile, Northeast Japan, Izu-Bonin, Southwest Japan, and Ryukyu arcs, showing complex patterns common in the western Pacific. Four of these form segments of active island arcs between the Eurasian continent and the Pacific Oce ...
Thinning of continental backarc lithosphere by flow
... there has been no significant extension. One mechanism to produce thin backarc lithosphere is through gravitational thinning of normal thickness lithosphere by subduction-related mantle flow. The stability of backarc mantle lithosphere is examined using thermal–mechanical models of subduction of an oc ...
... there has been no significant extension. One mechanism to produce thin backarc lithosphere is through gravitational thinning of normal thickness lithosphere by subduction-related mantle flow. The stability of backarc mantle lithosphere is examined using thermal–mechanical models of subduction of an oc ...
Basin formation by volcanic arc loading
... although we emphasize that basins form in arcs by a number of mechanisms, and we are not proposing that all basins form in this way. The model has particular relevance to basins that form very close to the volcanic arc. The proximal parts of such basins will be characterized by coarse volcanic debri ...
... although we emphasize that basins form in arcs by a number of mechanisms, and we are not proposing that all basins form in this way. The model has particular relevance to basins that form very close to the volcanic arc. The proximal parts of such basins will be characterized by coarse volcanic debri ...
The Skaergaard Layered Series. Part II
... zones has less liquid and behaves more or less rigidly (Fig. 1). In an intermediate range, the result is centimeterto decimeter-scale ‘S/C structures’ in which the foliation (S) is cut at intervals by narrow bands of shear (C for ‘cisaillement’) making a small angle with the foliation. At even small ...
... zones has less liquid and behaves more or less rigidly (Fig. 1). In an intermediate range, the result is centimeterto decimeter-scale ‘S/C structures’ in which the foliation (S) is cut at intervals by narrow bands of shear (C for ‘cisaillement’) making a small angle with the foliation. At even small ...
thrust systems - The Web site cannot be found
... - Collision tectonics involves thickening and imbrication of the crust and lithospheric mantle when the ocean closes. Hence an orogenic belt is generally aligned along a zone of continental collision. Deformation produces excess topography (mountain range) that erosion modifies and destroys on a lon ...
... - Collision tectonics involves thickening and imbrication of the crust and lithospheric mantle when the ocean closes. Hence an orogenic belt is generally aligned along a zone of continental collision. Deformation produces excess topography (mountain range) that erosion modifies and destroys on a lon ...
On the gravity and geoid effects of glacial isostatic adjustment in
... and Svensson (2007)]. The resulting non-isostatic effect on the gravity field should therefore appear as negative gravity and geoid anomalies. However, as these anomalies are superimposed on the total gravity signals, generated by many kinds of mass heterogeneities in the Earth, they are not directl ...
... and Svensson (2007)]. The resulting non-isostatic effect on the gravity field should therefore appear as negative gravity and geoid anomalies. However, as these anomalies are superimposed on the total gravity signals, generated by many kinds of mass heterogeneities in the Earth, they are not directl ...
The global range of subduction zone thermal structures from
... compilation and comparison suggest that exhumed high-P rocks provide a more accurate constraint on P–T conditions within subduction zones, and that those conditions may closely represent the subduction geotherm. While exhumation processes in subduction zones require closer petrologic scrutiny, the n ...
... compilation and comparison suggest that exhumed high-P rocks provide a more accurate constraint on P–T conditions within subduction zones, and that those conditions may closely represent the subduction geotherm. While exhumation processes in subduction zones require closer petrologic scrutiny, the n ...
Dynamics of the Eurasian Plate
... 2. continental margin forces FCM opposing ridge push along the same segments, 3. a free border along what remains of the upper edge, representing a zone of probably mostly strike-slip displacement (Gaina, Roest and Müller [12]) across Siberia where Eurasia borders on the North American plate, 4. tr ...
... 2. continental margin forces FCM opposing ridge push along the same segments, 3. a free border along what remains of the upper edge, representing a zone of probably mostly strike-slip displacement (Gaina, Roest and Müller [12]) across Siberia where Eurasia borders on the North American plate, 4. tr ...
Late Palaeozoic lam pro phyres and as so ci ated mafic subvolcanic
... Lamprophyric magmatism in the Sudetes, in the eastern part of the European Variscides, occurred during a period of post-collisional extension in the Carboniferous. The lamprophyres (minettes, vogesites, spessartites, kersantites) and associated mafic rocks (monzonites, micromonzodiorites) were empla ...
... Lamprophyric magmatism in the Sudetes, in the eastern part of the European Variscides, occurred during a period of post-collisional extension in the Carboniferous. The lamprophyres (minettes, vogesites, spessartites, kersantites) and associated mafic rocks (monzonites, micromonzodiorites) were empla ...
A crustal model of the ultrahigh-pressure Dabie Shan orogenic belt
... 270 km following Pn. This phase (P x ) cannot simply be the asympotic wide-angle PmP reflection because, in this case, the apparent velocity would be equal to the velocity of the lower crust (6.6 – 6.9 km/s in this region). The travel time and amplitude of this phase are similar to a prominent phase ...
... 270 km following Pn. This phase (P x ) cannot simply be the asympotic wide-angle PmP reflection because, in this case, the apparent velocity would be equal to the velocity of the lower crust (6.6 – 6.9 km/s in this region). The travel time and amplitude of this phase are similar to a prominent phase ...
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.