A. Nicolas's Structures of Ophiolites and Dynamics of Oceanic Lithosphere PDF

By A. Nicolas

ISBN-10: 9400923740

ISBN-13: 9789400923744

ISBN-10: 9401075697

ISBN-13: 9789401075695

`This is a truly precious ebook for either oceanographers and geologists attracted to the formation of oceanic crust and its accretion into continents. the writer has rigorously undergone a lot of the literature in this topic, so the bibliography is intensely worthy for these attempting to capture up or these simply beginning learn within the field.'
Episodes, 13:1, 1990

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Additional info for Structures of Ophiolites and Dynamics of Oceanic Lithosphere

Sample text

However, because the limit between the isotropic gabbros and the gabbros affected by a magmatic foliation (the planar-laminated gabbros of the preceding authors) is difficult to trace up section, and because the foliated gabbros become progressively layered downsection, correspondence between the various data sets are uncertain. Our foliated gabbro unit coincides roughly with the 'cumulate planar-laminated gabbro' unit of the BRGM. 1. 2. 3. 1. Mafic section in the Oman ophiolite a- Pillow lavas from the Geotimes basalts (Wadi Jizzi).

1974; Graham, 1980). The fonner authors have estimated the width of the Hawasina basin between 400 km and 1200 lan, on the basis of a palinspastic nappes reconstruction. 2), now welded to Eurasia. ,1974). This is deduced from the fact that only at the latilUde of Mascate do the nappes ride over the aUloch{Qnous calcareous fonnations of the Arabic platfonn, cropping out in the Saih Hatat and the Djebel Akhdar. In the North, they are thrust over and against the Sumeini fonnations which represent a shelf- edge sedimentation taking place from the rifting initiation to Mid- Cretaceous (fig.

The X,Y,Z directions are materialized in plastically and homogeneously deformed rocks by the foliation (X, Y plane of mineral flattening) and the stretching lineation (X axis), commonly a mineral lineation. On the other hand, the slip planes and slip lines of the actively deforming minerals, olivine and orthopyroxene, become progressively oriented during flow, parallel to the plane and the line of simple shear, respectively. Thus the flow structure is recorded in the lattice preferred orientation of olivine and enstatite.

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Structures of Ophiolites and Dynamics of Oceanic Lithosphere by A. Nicolas


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