Ophiolite PowerPoint PPT Presentations

OPHIOLITES What are ophiolites? Where are they found? How do they compare with oceanic crust? How do the ophiolites of Western Newfoundland compare to oceanic crust?

THE VOURINOS OPHIOLITE, NORTHWEST MACEDONIA, GREECE. VOURINOS. 2006 ... Associated tectonic melange. Atypical structures! Beautiful metamorphism. No fossils ...

Layer 2A & B = pillow basalts. Layer 2C = vertical sheeted dikes ... Submarine eruptions and pillows. Sheeted Dyke / Lava Transition ...

Melting increases rapidly above solidus but then settles and increases linearly ... Possible to have aluminous phase near solidus (Plag) ...

... Ophiolite Obduction Oceanic Crust and Upper Mantle Structure Typical Ophiolite Layer 1 A thin layer of pelagic sediment Pillow lavas in the Semail ...

... strange stuff like this Ages of the sea floor Semail (Oman) ophiolite Troodos (Cyprus ) ophiolite Bay of Islands (Newfoundland) ophiolite Papua ...

Lithology and thickness of a typical ophiolite sequence, based on the Samial Ophiolite in Oman. After Boudier and Nicolas (1985) Earth Planet. Sci.

Lithology and thickness of a typical ophiolite sequence, based on the Samial Ophiolite in Oman. After Boudier and Nicolas (1985) Earth Planet. Sci. Lett., 76, 84-92.

... Movements Fit of Continents Across the Atlantic Present Day Atlantic Atlantic 65 m.y. ago Geology of Plate Margins Ophiolites: ...

... & magnesium The largest ophiolite is in Oman near the Persian Gulf. Photo by Peter Kelemen. 6. Continental crust made up mostly of silicon, oxygen, ...

The Archean still had high temps and it is possible that a Komatiitic ocean crust could ... A dismembered ophiolite was found in Dongwanzi China by Tim Kusky ...

... Dikes and Sills Meta-sediments Metamorphic Rocks Foliation and Lineation Breccias Evolution of the Arabian Shield Ophiolite Belts in The Arabian Shield The ...

... of continents Broader Implications Divergent zones Rifted continental margins The development of sedimentary basins Ophiolite sequences Geologic record of ancient ...

... are serpentinized lherzolitic peridotites belong to an ophiolite sequence which represents the remnants of a Mesozoic ocean in the South Alpine-Apennine ...

Laterisation process Upper Cretaceous to Eocene/Miocene. Cretaceous: ophiolite complex , igneous intrusiva. Upper Triassic: dolomitic limestone ...

... the oldest known complete ophiolite providing evidence for an ancient convergent plate boundary is the Jormua complex in Finland It is about 1.96 billion ...

... MORB SPREADING RATES OCEANIC CRUST AND UPPER MANTLE STRUCTURE EVIDENCE Seismic Velocities Deep Sea Drilling Program Ophiolites Dredging of Fracture Zone ...

... accretion of Coast Range Ophiolite Farallon Plate Subduction Begins Voluminous Arc Magmatism Crustal Shortening Emplacement of Mega-Thrust Sheet ...

Instrumental in the discovery of the Offset Zone (16MT) at the Lac des Iles Mine ... Claims cover a portion of the Betts Cove Ophiolite Complex which hosts two Cu-Au ...

http://www.geomar.de/zd/labs/stab-iso/forams.jpg ... http://collections.ic.gc.ca/geoscience/images/detail/F92S0220.jpg. Ophiolite Suite ...

... (ophiolites) are mostly peridotite Mantle rocks must melt to form basaltic magma 3 types of primary basaltic magma At divergent plate margins ...

... settle slow in open ocean water Oceanic crust and ophiolites Hydrothermal activity Chapter 18 The Sea Floor Method of studying the sea floor Depth was ...

An idealized ophiolite sequence shows an upper layer consisting of deep sea sediments (limestones, cherts, and shales), overlying a layer of pillow basalts.

Ridges and Transforms The Plate Tectonics Model Sea-Floor Spreading 1. How we know plate tectonics happens Ophiolites: Oceanic Crust Anatomy of a Mid-Ocean Ridge ...

Ni-laterites, Ni in soils in east Albania Simplified tectonic map of central part of Albania (Hoxha, 2001). B: Distribution of ophiolites along of the Balkan ...

L'ophiolite d'Oman est une portion de lithosph re oc anique datant du Cr tac ... aidera r pondre la question essentielle : comment se forme la cro te oc anique nouvelle ? ...

Gold mineralization. Host rocks & mechanisms that concentrate gold. History of California Gold Rush & Mining methods. Moon over the northern Sierras ...

... mid- to late Cretaceous age. ... Late Triassic, b) Late Cretaceous, c) Late Eocene (Robertson, ... belongs to the mid-Cretaceous, and formed ~91 my ago. ...

Alps structure and tectonics. Tertiary Collision between Italian Peninsula and Central Europe ... Late Cretaceous, precollisional plate-tectonic geometry ...

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The oceanic crust is the part of Earth's lithosphere which underlies the ocean basins. ... About 60% of the Earth's surface is underlain by oceanic crust. ...

Outcrops of the North American continental margin units along the northern half ... Paleogeographic evolution of the continental margins ...

Consequences of magmatic intraplating: Crustal melting and magma contamination in the Norwegian Caledonides Calvin Barnes Aaron Yoshinobu Tore Prestvik

The term 'Central Asian Orogenic Belt' has geosynclinal connotation. ... that are located between the Siberian craton, Tarim, and North China (Yanshin et ...

Carbonate deposits continue to dominate the continental shelf. ... The Western Interior, like most continental regions around the Earth, was well ...

La reconstitution de l histoire g ologique des alpes : 0 Ev nements g ologiques majeurs Coupes sch matiques Nord 20 A -245 Ma, tous les continents sont r unis ...

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Moreover, a sub-continental magmatism, with WPT affinity, characterizes some ... West of the plateau, continental fragments (i.e., Chortis) and volcanic arc ...

Ocean Crust Marine Geology Thanks to Don Reed San Jose State University

Title: Magma Subject: basic magma properties Author: Authorized Gateway Customer Last modified by: Michael F. Sheridan Created Date: 2/14/1996 12:46:58 PM

Overlying clastic marine sequence. Imbricate Fault Zone- late Cretaceous-fault slices of many different rock types ... early Cretaceous- clastic sequence of ...

Marine Reflection Seismology - Geometry The streamer records waves reflected from interfaces

Cratons parts of shield with thin cover of sedimentary rocks ... more inboard position less subsidence. Wading in Iapetus - Stromatolites. Wading in Iapetus ...

Himalayan structure and tectonics. India-Asia collision responsible for almost ... high-grade metamorphic and/or plutonic rocks mantled by Tibetan zone sedimentary ...

Title: Continental growth spurts were all before 1 Ga Subject: eclogite cycle Author: Don Anderson Last modified by: Don Anderson Created Date: 11/23/2006 1:36:59 AM

Melange. Melange. Coesite in Quartz. Not very dramatic. Rare. Relict in inclusions, often in garnet ... Ugrandite Series (Ca Fe-Al-Cr) Gossularite ...

Title: Powerpoint Presentation Physical Geology, 10/e Author: steve kadel Last modified by: dmillen Created Date: 1/12/2004 8:59:44 PM Document presentation format

Tectonic M langes. Left: 7,3,1 Composite. Red Box outlines area of next 2 s. ... Tectonic winows and related Folds. E-MORB. OIB. Band Ratio 4/7-3/4-2/1 ...

Course 7 Igneous Rocks Igneous Rocks Formed in Rift Igneous Rocks Formed Above Subducting Plate Andesite Granite Peridotite Ternary Diagrams Continental Large ...

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Students conducted Field mapping, Petrography, Whole-rock and ... and ultramafic bodies from Franklin, NC northeastward - do they have similar protoliths? ...

9) Solid Earth. The student knows Earth s interior is differentiated chemically, physically, and thermally. The student is expected to: c. Explain how scientists ...

Exotic vs' Fringing Arc Models for the Growth Of Continents: Evidence from Mesozoic ArcRelated Basin

Asbestos is a commercial name for a group of minerals that crystallize as long, thin fibres. ... Nonconducting. Chemically inert. Strong but flexible ...

halite / gypsum ratio due to reflux. SEDIMENTARY ROCKS. Chemical Precipitates. Evaporative reflux: constant recharge. constant evaporation. loss of brine ...

Chapter 13: Mid-Ocean Rifts The Mid-Ocean Ridge System Figure 13-1. After Minster et al. (1974) Geophys. J. Roy. Astr. Soc., 36, 541-576. Ridge Segments and Spreading ...