New Idria serpentinite protrusion, Diablo Range, California: From upper mantle to the surface
Links
- More information: Publisher Index Page (via DOI)
- Download citation as: RIS | Dublin Core
Abstract
The New Idria serpentinite body in the Coast Ranges of California is a diapir that resulted from the interaction of the migrating Mendocino trench-ridge-transform fault triple junction, transpression, metasomatic fluids, and previously subducted oceanic crust and mantle. Northward propagation of the San Andreas fault progressively eliminated the original subduction zone, allowing seawater to penetrate into the formerly subducting abyssal peridotite mantle, triggering serpentinization. The associated physical changes in density, volume, and strength yielded an expanding, buoyantly rising serpentinite protrusion, facilitated by transpression along the San Andreas fault. Sedimentary facies and intrusion of minor cross cutting syenite and alkali basalt dikes indicate that the serpentinization-driven diapir buoyantly rose and widely breached the surface by ca. 14 Ma, attending migration of the Mendocino Triple Junction past the latitude of New Idria.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | New Idria serpentinite protrusion, Diablo Range, California: From upper mantle to the surface |
| Series title | American Journal of Science |
| DOI | 10.2475/04.2022.01 |
| Volume | 322 |
| Issue | 3 |
| Year Published | 2022 |
| Language | English |
| Publisher | American Journal of Science |
| Contributing office(s) | Geology, Energy & Minerals Science Center |
| Description | 28 p. |
| First page | 533 |
| Last page | 560 |
| Country | United States |
| State | California |
| Other Geospatial | Diablo Range |
| Google Analytic Metrics | Metrics page |