Deep Drilling Results in the Atlantic Ocean: Ocean Crust by Talani M

By Talani M

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Published through the yank Geophysical Union as a part of the Maurice Ewing Series.

The moment Maurice Ewing Symposium used to be dedicated to the consequences of deep drilling leads to the Atlantic Ocean. This topic used to be selected for 2 purposes. First, Maurice Ewing used to be one of many leaders of JOIDES (Joint Oceanographic associations For Deep Earth Sampling), the organization of oceanographic associations that used to be shaped to arrange and sponsor drilling within the deep ocean, and which has persevered to supply medical suggestion to the Deep Sea Drilling undertaking. moment, the 1st part of overseas software of Ocean Drilling within the Atlantic was once comprehensive and it appeared a great time to evaluate the results of drilling leads to the Atlantic that were bought over virtually a decade.


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13. Three stages, before, during, and after the formation of a fault in laterally moving uniform thickness lithosphere. Since the major fault blocks have a finite width, the present position of the inner walls will on average be further from the spreading axis than the position of their origin. If g represents the distance of the fault generation position from the axis, Yl the observed distance from the axis to the first inward facing fault and ~y the mean fault spacing, then g = Y1 ~y (Flg. 12) · -:2 Table II shows observations of the width of the spacing of the inner walls (or first pair of major inward facing faults) for the different survey areas, and the calculated values of g, using the appropriate fault spacing.

And J. Francheteau, The implications of terrestrial heat-flow observations on current tectonic and geochemical models of the crust and upper mantle of the Earth, Geophys. J. R. astr. , 20, 509-542, 1970. C. S. Laughton, Sonar Studies of the Mid-Atlantic Ridge and Kurchatov Fracture Zone, J. Geophys. , 82, 5313-5328, 1977. M. A. H. J. G. Andrews, GLORIA II - An improved long range side-scan sonar, Oceanology International 1978, IEEE/IERE Sub-Conference on offshore instrumentation and communications, 32 Vol.

LAUGHTON Copyright American Geophysical Union 29 Maurice Ewing Series Deep Drilling Results in the Atlantic Ocean: Ocean Crust zone of flexure the fault blocks are progressively tilted to a maximum at the outer edge of the flexure zone. For a throw of 200 m and fault spacing of 2 km, the maximum tilt is 6°. outward tilting of fault blocks of an average 0 2° at the inner wall and between 3 and SO at the outer walls in the FAMOUS area have been observed by Macdonald and Luyendyk (1977). On the Reykjanes Ridge, our medium range side-scan sonar 0 0 has shown outward tilting as high as 20 to 30 , although more commonly about 10 .

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