High-Pressure Phase Transformation of CaSO4 (Anhydrite) During a Nuclear Explosion

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Science  08 Aug 1975:
Vol. 189, Issue 4201, pp. 454-455
DOI: 10.1126/science.189.4201.454


Examination of the postshot cores from the portion of the Tatum Salt Dome that had been subjected to a nuclear explosion (Salmon Event) has indicated evidence for the high-pressure phase transformation of anhydrite. This evidence consists of distinctly different optical domains within the shocked anhydrite. Evidence for the transition exists out to approximately 1.5 cavity radii. Excellent agreement exists between experimental work and the theoretical calculations of the predicted pressure profile.