The role of serpentinite melanges in the unroofing of UHPM rocks: An example from the Western Alps of Italy: Chapter 6
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Abstract
The ultrahigh pressure metamorphic rocks (UHPM) of the Dora-Maira continental massif are overlain by a stack of oceanic nappes. Metamorphic grade appears to increase downward but with marked discontinuities between each of the nappes, suggesting that section has been removed along the bounding faults. This apparent omission of section is greatest in the lowest oceanic unit where a serpentinite melange containing blocks and slabs of eclogite, metamorphosed at 12–19 kbar, lies on the UHPM rocks. We suggest that this serpentinite melange represents a highly attenuated upper mantle section that structurally overlay the UHP rocks during subduction. Similar serpentinite melanges are known from other high-pressure (HP) and UHPM areas and may have a similar origin.
| Publication type | Book chapter |
|---|---|
| Publication Subtype | Book Chapter |
| Title | The role of serpentinite melanges in the unroofing of UHPM rocks: An example from the Western Alps of Italy: Chapter 6 |
| DOI | 10.1017/CBO9780511573088.007 |
| Year Published | 1995 |
| Language | English |
| Publisher | Cambridge University Press |
| Contributing office(s) | Geology, Minerals, Energy, and Geophysics Science Center |
| Description | 24 p. |
| Larger Work Type | Book |
| Larger Work Title | Ultrahigh Pressure Metamorphism |
| First page | 182 |
| Last page | 205 |
| Google Analytic Metrics | Metrics page |