Timing and kinematics of deformation in the Cronese Hills, California, and implications for Mesozoic structure of the southwestern Cordillera

Journal Article · Fri Jun 01 00:00:00 EDT 1990 · Geology; (USA)

DOI:https://doi.org/10.1130/0091-7613(1990)018<0554:TAKODI>2.3.CO;2· OSTI ID:6357435

Walker, J D; Martin, M W; Coleman, D S ^[1]; Bartley, J M ^[2]

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1. Univ. of Kansas, Lawrence (USA)
2. Univ. of Utah, Salt Lake City (USA)

A southeast-vergent ductile shear zone is exposed in the Cronese Hills in the central Mojave Desert. This shear zone formed under greenschist facies conditions and placed mylonitic metaplutonic and metavolcanic rocks upon folded Triassic( ) metasedimentary rocks. U-Pb zircon ages of prekinematic and postkinematic plutons constrain the age of deformation to between 169 and 154 Ma (late Middle or early Late Jurassic). The authors believe that the Cronese shear zone forms part of the southern continuation of the east Sierran thrust system. Mesozoic thrust faults may have controlled preservation of Jurassic arc-related rocks and may be responsible for structural stacking of Paleozoic eugeoclinal and miogeoclinal strata in the central Mojave Desert.

• OSTI ID: 6357435
• Journal Information: Geology; (USA), Vol. 18:6; ISSN 0091-7613
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
CALIFORNIA
DESERTS
TECTONICS
AGE ESTIMATION
DEFORMATION
GEOLOGIC FAULTS
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
ISOTOPE DATING
ISOTOPE RATIO
LEAD ISOTOPES
MESOZOIC ERA
METAMORPHIC ROCKS
PLUTONIC ROCKS
SEDIMENTARY ROCKS
SHEAR
URANIUM ISOTOPES
VOLCANIC ROCKS
ACTINIDE ISOTOPES
ARID LANDS
FEDERAL REGION IX
GEOLOGIC AGES
GEOLOGIC FRACTURES
IGNEOUS ROCKS
ISOTOPES
NORTH AMERICA
ROCKS
USA
580000* - Geosciences