ROCK FABRIC ANALYSIS OF THE SIERRA CREST SHEAR ZONE SYSTEM, CALIFORNIA: IMPLICATIONS FOR CRUSTAL-SCALE TRANSPRESSIONAL SHEAR ZONES

Simple item page
dc.contributor.advisorJiang, Dazhien_US
dc.contributor.authorBentley, Callanen_US
dc.contributor.departmentGeologyen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2005-02-02T06:49:37Z
dc.date.available2005-02-02T06:49:37Z
dc.date.issued2004-12-08en_US
dc.description.abstractCrustal-scale tabular shear zones are common features of transpressional orogens and arcs. Though foliation development in shear zones is well understood, the development of another rock fabric element, lineation, is not. Computer modeling shows that monoclinic solutions for lineations are unstable; triclinic models better explain the variation of lineation in natural transpressional zones. This thesis investigates an example of natural lineation variation in three segments of the Sierra Crest shear zone system, Sierra Nevada, California. Field data collected during large-scale mapping indicate an early (Paleozoic?) generation of deformation overprinted by a Cretaceous, dextral, reverse (west-over east), steeply-dipping shear zone active for ~20 Ma. A third generation of deformation overprints previous fabrics. Estimates of shear zone volume reduction are correlated with volumetrically-complementary emplacement of the Sierra Nevada batholith across strike. Disagreement between single-domain model predictions and field observations is interpreted as being due to heterogeneous strain localization on many scales.en_US
dc.format.extent12162331 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/2123
dc.language.isoen_US
dc.subject.pqcontrolledGeologyen_US
dc.subject.pquncontrolledSierra Nevadaen_US
dc.subject.pquncontrolledshear zonesen_US
dc.subject.pquncontrolledtranspressionen_US
dc.subject.pquncontrolledrock fabricen_US
dc.subject.pquncontrolledlineationen_US
dc.titleROCK FABRIC ANALYSIS OF THE SIERRA CREST SHEAR ZONE SYSTEM, CALIFORNIA: IMPLICATIONS FOR CRUSTAL-SCALE TRANSPRESSIONAL SHEAR ZONESen_US
dc.typeThesisen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
umi-umd-2093.pdf
Size:
11.6 MB
Format:
Adobe Portable Document Format
Download

Collections

UMD Theses and Dissertations
Geology Theses and Dissertations