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Craton margins tectonism

Sloss, L. L. and Speed, R. C. (1974). Relationships of cratonic and continental-margin tectonic episodes. In "Tectonics and Sedimentation" (W. R. Dickenson, ed.), pp. 98-119. Society of Economic Paleontologists and Mineralogists, Tulsa, Oklahoma, SEPM Special Publication 22. [Pg.228]

Modern oceanic mantle is defined solely by abyssal peridotites, which are samples of harzbur-gite and Iherzolite collected from fracture zones at oceanic spreading centers, and these samples are representative of shallow oceanic lithosphere that has been processed at mid-ocean ridges (see Chapter 2.04). Two types of continental mantle lithosphere are considered (i) cratonic mantle, which refers to xenoliths collected from kimberlites that sample portions of mantle beneath stable, Archean cratons and (ii) off-craton mantle, which refers to xenoliths collected from alkalic basalts that have sampled portions of the subcontinental mantle adjacent to ancient cratonic mantle (see Chapter 2.05). Also included with off-craton lithosphere are orogenic Iherzolites and ophiolites, which are slices of mantle tectonically emplaced typically at convergent margins. [Pg.1070]

Mkweli, S., Kamber, B. S. Berger, M. 1995. A westward continuation of the Zimbabwe craton - northern marginal zone tectonic break and new age constraints on the timing of the thrusting. Journal of the Geological Society, London, 152, 77-83,... [Pg.210]

The study of the structure and tectonic evolution of Antarctica was stimulated by a proposal that the East Antarctic craton was originally connected to North America (Moores 1991 Dalziel 1991 Hoffman 1991). This startling hypothesis was preceded by reports of Hartnady (1986,1991) and was prompted by the work of the Bell and Jefferson (1987) who had previously correlated the late Precambrian rocks of western Canada with similar rocks in South Australia. These authors concluded that a rift had formed between western Canada and Australia at about 1,200 Ma and that both continental fragments had developed complementary passive rift margins by about 750 Ma. [Pg.278]


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See also in sourсe #XX -- [ Pg.147 ]




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