Numerical Modelling of Rifted Continental Margin Formation
... We numerically model continental lithosphere deformation leading to breakup and sea floor spreading initiation in response to an imposed upwelling and divergent flow field applied to continental lithosphere and asthenosphere. The model is used to predict rifted continental margin lithosphere thinnin ...
... We numerically model continental lithosphere deformation leading to breakup and sea floor spreading initiation in response to an imposed upwelling and divergent flow field applied to continental lithosphere and asthenosphere. The model is used to predict rifted continental margin lithosphere thinnin ...
Partnership in Fisheries -- ZMT Projects along the West African Coast
... The fisheries along the West-African coast is focused on small pelagic species of the upwelling ecosystem of the Canary current, especially off the Mauritanian and Senegalese coasts. The interplay between climate change, the potential adaptation of species, and the impact of fisheries on the coastal ...
... The fisheries along the West-African coast is focused on small pelagic species of the upwelling ecosystem of the Canary current, especially off the Mauritanian and Senegalese coasts. The interplay between climate change, the potential adaptation of species, and the impact of fisheries on the coastal ...
Dr. Joaquim Goes - (UConn) Marine Sciences
... a mixotrophic dinoflagellate, Noctiluca scintillans (Noctiluca). First seen in smaller numbers off the coast of Oman, Noctiluca blooms have now become more pervasive and widespread throughout the northern Arabian Sea replacing diatoms as the dominant winter-time bloom forming phytoplankton. The appe ...
... a mixotrophic dinoflagellate, Noctiluca scintillans (Noctiluca). First seen in smaller numbers off the coast of Oman, Noctiluca blooms have now become more pervasive and widespread throughout the northern Arabian Sea replacing diatoms as the dominant winter-time bloom forming phytoplankton. The appe ...
A selfconsistent model of melting, magma migration and
... buoyancy of the liquid should cause it to migrate upward relative to the solid with ease. When considering the zc Ftot x,, ...
... buoyancy of the liquid should cause it to migrate upward relative to the solid with ease. When considering the zc Ftot x,, ...
Imaging the Deep Seismic Structure Beneath a Mid
... The data support the passive flow hypothesis Melt is produced in a broad region several hundred km across and at least one hundred km deep. ...
... The data support the passive flow hypothesis Melt is produced in a broad region several hundred km across and at least one hundred km deep. ...
Hot Spot Volcanism on Venus, Earth and Mars
... Venus has nine recognized hotspots. Their gravity signatures are consistent with mantle plumes at depth. Surface emissivity data from VIRTIS shows that all 3 hotspots covered by this data set have high emissivity flows, which we interpret as relatively unweathered flows. Current volcanism has import ...
... Venus has nine recognized hotspots. Their gravity signatures are consistent with mantle plumes at depth. Surface emissivity data from VIRTIS shows that all 3 hotspots covered by this data set have high emissivity flows, which we interpret as relatively unweathered flows. Current volcanism has import ...
I. Abstract II. Geological background III. Thermo
... mantle upwelling. A relatively high convergence velocity is shown to produce a strong coupling of the subducting slab with the overriding plate, and a higher mantle thermal gradient would facilitate the rolling back of the slab. This process probably accounts for the initiation of the extensional re ...
... mantle upwelling. A relatively high convergence velocity is shown to produce a strong coupling of the subducting slab with the overriding plate, and a higher mantle thermal gradient would facilitate the rolling back of the slab. This process probably accounts for the initiation of the extensional re ...
Neritic Zone
... • The shallow water over the continental shelf receives: – Sunlight – Steady supply of nutrients washed from the land into the ocean – The light and nutrients enable large plantlike algae to grow – Large quantities of algae is a food source and shelter for other organisms ...
... • The shallow water over the continental shelf receives: – Sunlight – Steady supply of nutrients washed from the land into the ocean – The light and nutrients enable large plantlike algae to grow – Large quantities of algae is a food source and shelter for other organisms ...
tectonics for lab-short version
... material rises at ridges and cooler mantle material sinks at subduction zones. ...
... material rises at ridges and cooler mantle material sinks at subduction zones. ...
Document
... lithosphere (analogous to iceberg) and asthenosphere (analogous to seawater). Tectonic plates ‘float’ at an elevation which depends on their thickness and relative density; thus high areas will have large lithospheric ‘roots’. Where a balance is achieved between topography and size of roots, lithosp ...
... lithosphere (analogous to iceberg) and asthenosphere (analogous to seawater). Tectonic plates ‘float’ at an elevation which depends on their thickness and relative density; thus high areas will have large lithospheric ‘roots’. Where a balance is achieved between topography and size of roots, lithosp ...
7044
... formed in response to the same plume-driven magmatic event that created the widespread Paleoproterozoic igneous province in the area at 2.4–2.5 Ga. Thus, the mafic protoliths may have formed in a manner analogous to Phanerozoic lower crustal rocks (i.e. basaltic underplating), but in this case the u ...
... formed in response to the same plume-driven magmatic event that created the widespread Paleoproterozoic igneous province in the area at 2.4–2.5 Ga. Thus, the mafic protoliths may have formed in a manner analogous to Phanerozoic lower crustal rocks (i.e. basaltic underplating), but in this case the u ...
Common large-scale responses to climate and fishing across
... (RV) surveys are designed to monitor the distribution and abundance of commercial and non-commercial species. The US conducts annual multispecies surveys in spring and autumn, but we used just the autumn time-series for this study. The US surveys use a #36 Yankee (or similar) bottom trawl towed at ...
... (RV) surveys are designed to monitor the distribution and abundance of commercial and non-commercial species. The US conducts annual multispecies surveys in spring and autumn, but we used just the autumn time-series for this study. The US surveys use a #36 Yankee (or similar) bottom trawl towed at ...
Crustal collapse, mantle upwelling, and Cenozoic extension in the
... Abstract. Gravitational collapse has been suggestedas the major cause of Cenozoic extension in the North American Cordillera and many other orogenic belts. Although both crustal thickening and mantle upwelling may have contributed to the Cordilleran extension,previous models of gravitational collaps ...
... Abstract. Gravitational collapse has been suggestedas the major cause of Cenozoic extension in the North American Cordillera and many other orogenic belts. Although both crustal thickening and mantle upwelling may have contributed to the Cordilleran extension,previous models of gravitational collaps ...
Shaping mobile belts by small-scale convection
... effects of mantle convection, well established for continental interiors5–7, should be particularly relevant in a mobile belt, and modelling may constrain important parameters such as slab coherence and lithospheric strength. Here we compute global mantle flow on the basis of recent, high-resolution ...
... effects of mantle convection, well established for continental interiors5–7, should be particularly relevant in a mobile belt, and modelling may constrain important parameters such as slab coherence and lithospheric strength. Here we compute global mantle flow on the basis of recent, high-resolution ...
Deep structure of the northeastern Japan arc
... Seismic tomography studies in the northeastern Japan arc have revealed the existence of an inclined sheet-like seismic lowvelocity and high-attenuation zone in the mantle wedge at depths shallower than about 150 km. This sheet-like low-velocity, high-attenuation zone is oriented sub-parallel to the ...
... Seismic tomography studies in the northeastern Japan arc have revealed the existence of an inclined sheet-like seismic lowvelocity and high-attenuation zone in the mantle wedge at depths shallower than about 150 km. This sheet-like low-velocity, high-attenuation zone is oriented sub-parallel to the ...
tectonics2
... Most transform boundaries are associated with mid-ocean ridges (they form perpendicular to the rifts). One of the few major continental crustcontinental crust transform boundaries runs up the west coast of North ...
... Most transform boundaries are associated with mid-ocean ridges (they form perpendicular to the rifts). One of the few major continental crustcontinental crust transform boundaries runs up the west coast of North ...
Can we bridge geophysics,geochemistry & geodynamics?
... • will start to melt before reaching same T as surrounding mantle • already in TBL, so starts off warm • when 30% melt, garnet mostly gone & will start to rise ...
... • will start to melt before reaching same T as surrounding mantle • already in TBL, so starts off warm • when 30% melt, garnet mostly gone & will start to rise ...
Eclogite Engine
... • will start to melt before reaching same T as surrounding mantle • already in TBL, so starts off warm • when 30% melt, garnet mostly gone & will start to rise ...
... • will start to melt before reaching same T as surrounding mantle • already in TBL, so starts off warm • when 30% melt, garnet mostly gone & will start to rise ...
The Bent Hawaiian-Emperor Hotspot Track
... pattern, and longevity are best explained by the cannot distinguish between them with the mantle plume hypothesis. Some studies of alresolution of the available data. However, while Candidate Processes ternative mechanisms (e.g., a propagating crack) avoiding the Antarctic-Pacific connection, the Tw ...
... pattern, and longevity are best explained by the cannot distinguish between them with the mantle plume hypothesis. Some studies of alresolution of the available data. However, while Candidate Processes ternative mechanisms (e.g., a propagating crack) avoiding the Antarctic-Pacific connection, the Tw ...
Anomalously thin transition zone and apparently isotropic upper
... The absolute depths of the discontinuities are dependent on the velocity model used for the depth correction, but a significant deviation from this model, particularly with respect to the Vp/Vs ratio used would be a source of error. The seismic velocity structure of the central Atlantic Ocean is larg ...
... The absolute depths of the discontinuities are dependent on the velocity model used for the depth correction, but a significant deviation from this model, particularly with respect to the Vp/Vs ratio used would be a source of error. The seismic velocity structure of the central Atlantic Ocean is larg ...
View/Open - Earth
... trace element composition suggests a rift-to-drift transition marked by magmatic activity with typical MORB signature, with no contamination by continental lithosphere, but with slight differences in mantle source composition and/or temperature between Thetis and Nereus. Eruption rate, spreading rat ...
... trace element composition suggests a rift-to-drift transition marked by magmatic activity with typical MORB signature, with no contamination by continental lithosphere, but with slight differences in mantle source composition and/or temperature between Thetis and Nereus. Eruption rate, spreading rat ...
Upwelling
Upwelling is an oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water towards the ocean surface, replacing the warmer, usually nutrient-depleted surface water. The nutrient-rich upwelled water stimulates the growth and reproduction of primary producers such as phytoplankton. Due to the biomass of phytoplankton and presence of cool water in these regions, upwelling zones can be identified by cool sea surface temperatures (SST) and high concentrations of chlorophyll-a.The increased availability in upwelling regions results in high levels of primary productivity and thus fishery production. Approximately 25% of the total global marine fish catches come from five upwellings that occupy only 5% of the total ocean area. Upwellings that are driven by coastal currents or diverging open ocean have the greatest impact on nutrient-enriched waters and global fishery yields.
