Tectonic processes inferred from New Circum-Pacific geodynamic map
Conference
·
· Am. Assoc. Pet. Geol., Bull.; (United States)
OSTI ID:6988929
The geodynamic maps prepared by the Circum-Pacific Map Project show crustal thickness, active plate boundaries, volcanic centers, historical faulting, and earthquake focal mechanisms, all of which record past and present lithospheric deformation. The sheets also show free-air gravity anomalies and the state of lithospheric stress, both indicative of structural imbalances that may cause future deformation. Lithospheric-stress directions from focal mechanisms within oceanic plates indicate that the oceanic crust is under horizontal compression everywhere except along plate boundaries. This compression limits possible plate-driving mechanisms and seems to relegate the process of pull by sinking heavy lithospheric slabs into subduction zones to that of a local factor only.
- Research Organization:
- Geological Survey, Menlo Park, CA
- OSTI ID:
- 6988929
- Report Number(s):
- CONF-8608105-
- Conference Information:
- Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 70:7
- Country of Publication:
- United States
- Language:
- English
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