Continuous Subaqueous Deposition of The Permian Castile Evaporites, Delaware Basin, Texas and New Mexico
Walter E. Dean, Roger Y. Anderson, 1982. "Continuous Subaqueous Deposition of The Permian Castile Evaporites, Delaware Basin, Texas and New Mexico", Depositional and Diagenetic Spectra of Evaporites - A Core Workshop, C. Robertson Handford, Robert G. Loucks, Graham R. Davies
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Structures that are common in the Castile Formation (Ochoan) of the Delaware Basin, Texas and New Mexico (Fig. 1) include fine planar laminations, breccias, microfolded laminae, and nodular anhydrite. These structures, particularly the laminae, have been used to demonstrate the subaqueous depositional history of the Castile (Anderson and Kirkland, 1966; Anderson et al., 1972; Dean et al., 1975; Dean and Anderson, 1978). Kirkland and Anderson (1970) showed that the microfolds in the Castile are related to larger folds generated by tectonic compression. Breccia beds and chimneys and their relations to vertical and lateral salt dissolution in the Delaware Basin were discussed by Anderson et al. (1972), Anderson (1978), Anderson et al. (1978), and Anderson and Kirkland (1980). In this workshop we will describe and illustrate these structures and summarize how they have been used to understand the depositional and postdepositional history of a major evaporite deposit for which there is no modern analog.
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Geologists do not often have an opportunity to examine evaporites, whether in outcrops as badly weathered exposures, or in the subsurface, where evaporites are not as frequently cored as other rock types. Nevertheless, evaporites are important economically (mineral resource, seals for hydrocarbons, disposal sites for radioactive wastes, etc.) and geologists are, by necessity, becoming more aware of their origins. This workshop is intended to increase awareness and provide useful information for comparison to other evaporites, all of which should eventually benefit geologists in their efforts to understand the depositional and diagenetic spectra of evaporites.