Gravity and structure of the Pacific continental margin of Central Mexico Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/3f4629127

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Data collected by personnel of the Geophysics Group at Oregon State University and the Instituto Oceanografico of the Direccion General dé Oceanografia are used to construct a free-air anomaly map for the central part of the Pacific continental margin of Mexico, which shows the gravity expression of major structural features in the region. Specific features are the Middle America and Rivera trenches intersected by a possible extension of the Rivera Fracture Zone, and the Ulloa Trough on the western side of Baja California. Of particular importance are gravimetric minimums with no bathymetric expression observed east of the Tres Marias Islands, southeast and northwest of the Tamayo Fracture Zone, and as extensions of the bathymetrically mapped series of en echelon faults within the Gulf of California. A geophysical model cross section constructed along a profile southeast of the Tres Marias Islands indicates a continental type crust east of the islands with a Moho depth of 13 km at the base of the Tres Marias Scarp and dipping toward the continent. The structure at the transition zone between oceanic and continental crust suggests active subduction of the oceanic crust in the past followed by a period of shear or strike-slip motion. The thickness of the sediments along the cross section and east of the Tres Marias Islands reaches 1.5 km.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-05-03T21:34:42Z (GMT) No. of bitstreams: 1 SanchezZamoraOsvaldo1981.pdf: 723086 bytes, checksum: b14e345fd45eedc1a2e0e1dea1079ff3 (MD5)
  • description.provenance : Made available in DSpace on 2012-05-03T21:34:42Z (GMT). No. of bitstreams: 1 SanchezZamoraOsvaldo1981.pdf: 723086 bytes, checksum: b14e345fd45eedc1a2e0e1dea1079ff3 (MD5) Previous issue date: 1981-02-27
  • description.provenance : Submitted by Kirsten Clark (kcscannerosu@gmail.com) on 2012-05-02T23:21:27Z No. of bitstreams: 1 SanchezZamoraOsvaldo1981.pdf: 723086 bytes, checksum: b14e345fd45eedc1a2e0e1dea1079ff3 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-05-03T21:32:01Z (GMT) No. of bitstreams: 1 SanchezZamoraOsvaldo1981.pdf: 723086 bytes, checksum: b14e345fd45eedc1a2e0e1dea1079ff3 (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items