Geologic Mapping in the Black Mountain Area, Northern Eastern California Shear Zone: Testing a Kinematic and Geometric Fault Slip Transfer Model

New geologic mapping, structural, kinematic, and ⁴⁰Ar/³⁹Ar geochronology studies in the Black Mountain area, northern eastern California shear zone, are used to test a kinematic fault slip transfer model for the Owens Valley fault-Mina deflection transition. In the Black Mountain area, range bounding ~NNW- to ~NS-striking and lesser NW- to NE-striking normal faults cut Mesozoic, Miocene (22.42 ± 0.05 Ma), Pliocene (3.53 ± 0.06 to 3.29 ± 0.02 Ma), and early-middle Pleistocene (1936 ± 12.7 to 766 ± 3.1 ka) rocks. Palinspastically restored cross-sections show that offset Pliocene markers record 1.5 +0.7/-0.6 km of ~ENE-WSW extension since ~3.29 Ma, indicating an extension rate of ≥0.5 ± 0.2 mm/yr. We combine our new rates with slip rates on nearby fault zones to refine a kinematic fault slip transfer model for the Owens Valley fault-Mina deflection transition and address the discrepancy between geodetic strain rates and geologic slip rates across the region.

Name thesis:degree_name

Master of Science (MS)

Discipline thesis:degree_discipline

Geological Sciences

Year dc:date.available

2015

Author dc:creator

• DeLano, Kevin M.

Contributors dc:contributor

• Jeffrey Lee
• Anne Egger
• Chris Mattinson

• Owens Valley fault
• Fault Slip Transfer
• Kinematic Model
• Black Mountain area
• Mina deflection
• Extension
• Geology
• Tectonics and Structure

Language dc:language

English

Repository record dc:identifier

https://digitalcommons.cwu.edu/etd/277

OAI identifier oai:identifier

oai:digitalcommons.cwu.edu:etd-1289