Shock and thermal metamorphism of basalt by nuclear explosion, Nevada test site
Science
By: O.B. James
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Abstract
Olivine trachybasalt metamorphosed by nuclear explosion is classified into categories of progressive metamorphism: (i) Weak. Plagioclase is microfractured, and augite cotainis fine twin lamellae. (ii) Moderate. Plagioclase is converted to glass, and mafic minerals show intragranular deformation (undulatory extinction, twin lamellae, and, possibly, deformation lamellae), but rock texture is preserved. (iii) Moderately strong. Plagioclase glass shows small-scale flow, mafic minerals are fractured and show intragranular deformation, and rocks contain tension fractures. (iv) Strong. Plagioclase glass is vesicular, augite is minutely fractured, and olivine is coarsely fragmented, shows mosaic extinction, distinctive lamellar structures, and is locally recrystallized. (v) Intense. Rocks are converted to inhomogeneous basaltic glass.
Suggested Citation
James, O., 1969, Shock and thermal metamorphism of basalt by nuclear explosion, Nevada test site: Science, v. 166, no. 3913, p. 1615-1620, https://doi.org/10.1126/science.166.3913.1615.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Shock and thermal metamorphism of basalt by nuclear explosion, Nevada test site |
| Series title | Science |
| DOI | 10.1126/science.166.3913.1615 |
| Volume | 166 |
| Issue | 3913 |
| Year Published | 1969 |
| Language | English |
| Publisher | American Association for the Advancement of Science |
| Description | 6 p. |
| First page | 1615 |
| Last page | 1620 |
| Country | United States |
| State | Nevada |
| Other Geospatial | Nevada test site |