Global ETD Search
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Showing 1 to 19 of 19 for “"CORE-COMPLEXES"”.
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Geophysical Studies of Oceanic Core Complexes: The Mid-Atlantic Ridge, 13 - 14°N
… long-lived detachment faulting forms oceanic core complexes (OCCs) that expose lower crustal rocks and mantle material at the seafloor. Whilst many of the general features of this ‘magma-poor’ terrain have been identified, there is still widespread debate as to the exact conditions that …
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STRUCTURAL EVOLUTION OF THE RIO GRANDE RIFT: SYNCHRONOUS EXHUMATION OF RIFT FLANKS FROM 20-10 MA, EMBRYONIC CORE COMPLEXES, AND FLUID-ENHANCED QUATERNARY EXTENSION
… early stages in the development of metamorphic core complexes, and thus these regions in the rift link incipient extensional environments to highly extended terranes. At shorter time scales, heterogeneous strain accumulation may be governed in part by fluids in fault zones. As an example, along …
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The Effects of Amphibole- and Sulfide-Producing Melts on Crustal Strength in Gabbros of Lower Oceanic Crust in Oceanic Core Complexes, Mid-Atlantic and Southwest Indian Ridges
<p>This study investigates gabbro-cored oceanic core complexes in the slow-spreading Mid-Atlantic Ridge (MAR) and the ultraslow spreading Southwest Indian Ridge (SWIR). Dikelets are a texture found in thin section samples from these systems that form as a result of crystal-plastic deformation. Thin …
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Geodynamic Evolution of the Aegean Back-arc and its Implication for Associated Precious and Base Metal Mineralization
The exposed metamorphic core complexes in the Cyclades continental back-arc of southeast Greece host a range of base and precious metal deposits. Shallow crustal mineral deposits that formed since the late Miocene to active seafloor hydrothermal systems occur in the footwall and hanging wall of the …
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The heterogeneity and volatile content of Earth’s mantle, magmas and crust
… Chapter 6 surveys the life cycle of oceanic core complexes through zircon geochronology and posits an updated framework for understanding the termination of oceanic core complexes, and more broadly oceanic detachment faults. Together, this contribution highlights the chemical heterogeneity of …
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MID-ATLANTIC RIDGE (12~16oN) BATHYMETRIC ANALYSIS BY EMPIRICAL MODE DECOMPOSITION
… data set exist in a region where Oceanic Core Complexes have developed. It covers an area of about 15,600 square kilometers that contains at least seven well-documented oceanic core complexes (OCCs) based on previous studies. This study applies 2-D Empirical Mode Decomposition (EMD) to …
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Kinematics and timing of normal faulting in a metamorphic core complex: Grouse Creek Mountains, Utah
… Ma Red Butte stocks are exposed in a metamorphic core complex in northwest Utah, in the central Grouse Creek Mountains. 40Ar/39Ar thermochronology and kinematic studies indicate two periods of motion along the MMSZ in Eocene and Late Oligocene to Early Miocene time and motion along the …
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Structural constraints on the exhumation of the Tso Morari Dome, NW Himalaya
… India is a large (>3,000 km²) structural dome cored by coesite-bearing rocks of Indian continental crustal affinity. As one of only two localities in the Himalaya where ultrahigh-pressure rocks have been found, the culmination offers important insights into the orogenic processes responsible …
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The Impact of Fe-Ti Oxide Concentration on the Structural Ridgity of the Lower Oceanic Crust, Atlantis Bank, Southwest Indian Ridge
… oxides are important components of oceanic core complexes (OCC) formed at slow-spreading mid-ocean ridges since Fe-Ti oxides are more susceptible to crystal-plastic deformation than silicate minerals. This study investigated the predicted relationship between the presence and concentration …
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Geochemical and Geochronological Constraints on the Origin and Evolution of Rocks in the Active Woodlark Rift of Papua New Guinea
… found in the lower plates of large metamorphic core complexes. This is important because it signifies that lithospheric rupture has already occurred, despite the fact that mid-ocean ridge basalts are not yet being erupted and there are still topographically prominent metamorphic core complexes …
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Evolution of nutrient sensing in the mTORC1 pathway
… mechanisms that allow a highly conserved core pathway to adapt to the diverse nutritional niches that animals occupy. How does the mTORC1 pathway add new layers of regulatory sophistication to accommodate animals with divergent diets and lifestyles? Do organisms acquire novel nutrient …
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The roof of the cyclades : a structural, stratigraphic, and paleomagnetic study of Neogene extensional tectonics in Central Greece
… extensional exhumation of the metamorphic core complexes exposed in the Cycladic archipelago. In contrast with models of supra-detachment basin development related to fragmentation of the upper plate by arrays of parallel normal faults, I deduce that sedimentation in the Kymi-Aliveri basin …
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Computational investigations into two biological processes: membrane reshaping by light-harvesting proteins in the chromatophores of purple bacteria, and oligomerization and pore formation by the Hepatitis C viroporin p7
… are densely populated by the light harvesting complexes LH1 and LH2. LH1 is always found surrounding the reaction center, forming LH1-RC core complexes, which may be elliptically-shaped monomers or S-shaped dimers depending on the species of bacteria. LH2 is a small ring-shaped complex which is …
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The Role of Magmatism in the Catalina Metamorphic Core Complex, Arizona: Insights from Integrated Thermochronology, Gravity and Aeromagnetic Data
<p>The footwall of the Catalina MCC located within the Basin and Range Province has been intruded by several magmatic suites. Samples were collected from the Wilderness suite sills, the most voluminous suite. U/Pb data from zircon indicate that the Wilderness suite sills were emplaced during two …
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STRUCTURAL, THERMOCHRONOLOGICAL, AND STRATIGRAPHIC CONSTRAINTS ON THE EVOLUTION OF THE CLEARWATER METAMORPHIC CORE COMPLEX, IDAHO
<p>The Clearwater metamorphic core complex (CMCC) in northern Idaho is one of several core complexes in the northern Rocky Mountains that were exhumed in the early Eocene and is located in the middle of the dextral Lewis and Clark fault zone (LCFZ). The CMCC has been divided into two lithologically …
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STRUCTURAL, THERMOCHRONOLOGICAL, AND STRATIGRAPHIC CONSTRAINTS ON THE EVOLUTION OF THE CLEARWATER METAMORPHIC CORE COMPLEX, IDAHO
<p>The Clearwater metamorphic core complex (CMCC) in northern Idaho is one of several core complexes in the northern Rocky Mountains that were exhumed in the early Eocene and is located in the middle of the dextral Lewis and Clark fault zone (LCFZ). The CMCC has been divided into two lithologically …
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Functional analysis of plastid-encoded genes
… gene product was exclusively located in PSII core complexes. This localization was based on the isolation of protein complexes released from thylakoids by controlled, partial lysis, followed by sucrose density gradient centrifugation or 2D gel electrophoresis. This finding revised data of the …
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3D Analysis of Fe-Ti Oxides and How They Affect Crystal-Plastic Deformation in Atlantis Bank, Southwest Indian Ridge
<p>This project focuses on the importance of the relationship between Fe-Ti oxide abundance and interconnectivity, and crystal-plastic deformation in Atlantis Bank, Southwest Indian Ridge by utilizing Micro-CT scanning. This was done through comparing the Micro-CT scans of 15 samples from three …
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ΜΕΤΑΒΟΛΕΣ ΣΤΗ ΣΥΣΤΑΣΗ ΚΑΙ ΣΤΙΣ ΦΩΤΟΧΗΜΙΚΕΣ ΕΝΕΡΓΟΤΗΤΕΣ ΤΗΣ ΦΩΤΟΣΥΝΘΕΤΙΚΗΣ ΜΕΜΒΡΑΝΗΣ ΧΛΩΡΟΠΛΑΣΤΩΝ ΦΥΛΛΩΝ PHASEOLUS VULGARIS ΚΑΤΑ ΤΗΝ ΑΝΑΔΙΟΡΓΑΝΩ...
ΣΚΟΠΟΣ ΤΟΥ ΔΙΔΑΚΤΟΡΙΚΟΥ ΗΤΑΝ ΝΑ ΔΙΕΡΕΥΝΗΘΕΙ ΚΑΤΑ ΠΟΣΟ ΤΑ ΔΙΑΦΟΡΑ ΧΛΩΡΟΦΥΛΛΟΠΡΩΤΕΙΝΙΚΑ ΣΥΜΠΛΟΚΑ, ΜΕΤΑ ΤΟ ΣΧΗΜΑΤΙΣΜΟ ΤΟΥΣ ΚΑΙ ΤΗΝ ΟΡΓΑΝΩΣΗ ΤΟΥΣ ΣΕ ΔΡΑΣΤΙΚΕΣ ΦΩΤΟΣΥΝΘΕΤΙΚΕΣ ΜΟΝΑΔΕΣ, ΕΙΝΑΙ ΣΤΑΘΕΡΑ 'Η ΠΑΡΑΤΗΡΕΙΤΑΙ ΑΝΑΔΙΟΡΓΑΝΩΣΗ ΤΩΝ ΣΥΣΤΑΤΙΚΩΝ ΤΟΥΣ. ΒΡΕΘΗΚΕ ΟΤΙ ΣΕ ΧΛΩΡΟΠΛΑΣΤΕΣ ΠΟΥ ΒΡΙΣΚΟΝΤΑΙ ΣΤΟ ΣΤΑΔΙΟ …