lower crust
Generation of granitic magmas in the lower crust: a natural example from Mt Daniel, Fiordland, New-Zealand
... An alternative explanation for the chemical diversity of the MDC is that bulk assimilation of ARC basement has contributed a major component. Assimilation is most clearly observed in the lower sections of the MDC, ...
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Deformation in the lower crust and downward extent of the San Andreas Fault as revealed by teleseismic waveforms
... several lower crustal interfaces including Moho on both ...the lower crust and possibly uppermost mantle as a narrow ( < 10 km) fea- ...middle crust by a low angle detachment ...the ...
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Regional Flow in the Lower Crust and Upper Mantle under the Southeastern Tibetan Plateau
... the lower crust and uppermost mantle beneath the STP (Figures 4-6) show general agreement with the previous studies [2,5,12, ...the lower crust and upper mantle ...
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Constraints on the rheology of the lower crust in a strike-slip plate boundary: evidence from the San Quintín xenoliths, Baja California, Mexico
... the crust are the existence of ele- vated heat fluxes from the mantle and melt focusing (Depine et ...uppermost lower crust beneath northwest Baja California is consistent with the active tectonic ...
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Asymmetry of high-velocity lower crust on the South Atlantic rifted margins and implications for the interplay of magmatism and tectonics in continental breakup
... Two new refraction seismic models complemented by grav- ity models fill a gap in the data coverage on the Argen- tine margin and prove the existence of high-velocity lower crust (HVLC; Vp > 7.0). ...
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Shear strain concentration mechanism in the lower crust below an intraplate strike slip fault based on rheological laws of rocks
... the lower crust under an intraplate strike-slip fault based on laboratory-derived power-law rheologies considering the effects of grain size and ...the lower crust on a geological time scale, ...
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The lithospheric mantle and lower crust mantle relationships under Scotland: a xenolithic perspective
... Upton, B.G.J. and Downes, Hilary and Kirstein, L.A. and Bonadiman, C. and Hill, P.G. and Ntaflos, T. (2011) The lithospheric mantle and lower crust- mantle relationships under Scotland: a xenolithic ...
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Fluid reservoirs in the crust and mechanical coupling between the upper and lower crust
... An important observation associated with seismic activity on the Nagamachi-Rifu Fault is the existence of tabular, fluid rich zones at mid-crustal levels. These zones resemble the “bright spots” seen in many seismic ...
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Pb and Hf isotope evidence for mantle enrichment processes and melt interactions in the lower crust and lithospheric mantle in Miocene orogenic volcanic rocks from Monte Arcuentu (Sardinia, Italy)
... and lower crust, given the typically re- fractory nature of these lithologies, but such a scenario is consistent with the rapid rotation and extension that was occurring in southern Sardinia at the time ...
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Migration of reflector orientation attributes in deep seismic profiles: evidence for decoupling of the Yilgarn Craton lower crust
... the crust, with geological structures mapped at the surface whose orientation and tectonic his- tory are ...the lower crust behaved differently from the overlying middle crust as the newly ...
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Hornblendite delineates zones of mass transfer through the lower crust
... the lower crust, does not necessarily have to form by cumulate processes or intrusion of unusually basic to ultrabasic ...the crust and are likely to be important for transport of metals to sites of ...
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Coupled onshore erosion and offshore sediment loading as causes of lower crust flow on the margins of South China Sea
... Low-temperature thermochronology in the form of apatite fission track analyses allows us to estimate the amount of erosion that has occurred across southern China during the Cenozoic. Yan et al. (2009b) indicate that ...
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Imposed strain localization in the lower crust on seismic timescales
... In the first experiment (Fig. 1), we impose a uniform fric- tional coefficient μ = 0.1 along the fault from the surface to the base of the model crust. A coefficient of 0.1 repre- sents a weak fault that may have ...
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Origin of the seismic belt in the San in district, southwest Japan, inferred from the seismic velocity structure of the lower crust
... upper crust beneath the San-in ...the lower crust, low-velocity anomalies exist in the lower crust beneath the seismic belt ...the lower crust corresponds to the ...
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Constraints on the three dimensional thermal structure of the lower crust in the Japanese Islands
... the lower crust to solve the partial differential ...the lower crust for forecasting simulations of crustal deformations, despite the aforementioned ...
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Using Magma Mixing/Mingling Evidence for Understanding Magmatic Evolution at Mount Bidkhan Stratovolcano (South-East Iran)
... Mount Bidkhan stratovolcano is located in the central Iranian volcanic belt. It is composed of several types of pyroclastic deposits, lava flows and intrusive bodies. Textural and chemical characteristics of plagioclase ...
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Crustal architecture of the Laptev Rift System in the East Siberian Arctic based on 2D long-offset seismic profiles and gravity modelling
... quasi-uniform lower crust thickness, top basement geometry becomes the most 408 important factor controlling the gravity response along the ...thickest crust and the rise in Moho are inferred to be ...
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Formation and Evolution of the Continental Crust
... basaltic lower crust, followed by fractional crystallisation of amphibole, plagioclase and ...basaltic crust to trigger hydrous partial ...Icelandic crust and these rocks do not show the ...
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The Role of Fluids in Promoting Seismic Activity in Active Spreading Centers of the Salton Trough, California, USA
... the lower crust as shown by tomography and receiver function analysis; 2) low amplitude mag- netic anomaly in the location of active spreading centers attributed to the fluids and/or melts; and 3) a high ...
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Interesting Papers in Other Journals
... Synmetamorphic high density carbonic fluids in the Lower Crust: Evidence from the Nilgiri Granulites, Southern India, pp.. Rare earth element behaviour during evolution and al[r] ...
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