Age and tectonic significance of metamorphic rocks along the axis of the Sierra Nevada batholith: A critical reappraisal
- Univ. of Nevada, Reno (United States)
Metamorphic rocks in many roof pendants along the axis of the Sierra Nevada batholith (SNB) between 36 and 38{degree}N lat. have been considered part of the Kings sequence, of probable Mesozoic age. However, most of the pendants are in fact undated by fossils and may contain Paleozoic or Precambrian strata. A critical reappraisal of new and existing data on these pendants has led to the following hypotheses: (1) A continental crustal silver referred to as the Snow Lake block, with the approximate dimensions of the Salinian block, and represented by metamorphosed Proterozoic and Cambrian miogeoclinal rocks, extends 120 mi (200 km) southeastward from northern YNP to the Kaweah River drainage, and includes rocks in the following pendants: Snow Lake, Piute Mountain, Glen Aulin, May Lake, Iron mountain, Shuteye Peak, Dinkey Creek, Patterson Mountain, Boyden Cave, and Sequoia Park. This silver was displaced about 400 km northward along an intrabatholithic dextral strike-slip fault during the Early Cretaceous time. (2) Based on reconnaissance studies, the authors propose that the Shoo Fly Complex, which lies west of the Snow Lake block, continues southeastward to 36{degree}N lat., and includes parts of the following pendants: Oakhurst, Lower Kings River, Kaweah River, Tule River, and Kern Canyon. The apparent juxtaposition of the Shoo Fly Complex with the Snow Lake block requires the presence of a major tectonic break between them. This structure, now largely obliterated by Cretaceous plutons of the SNB, may be the equivalent of the Golconda thrust in north-central Nevada.
- OSTI ID:
- 5210986
- Report Number(s):
- CONF-9103128-; CODEN: AABUD
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 75:2; Conference: American Association of Petroleum Geologists (AAPG)/Society of Economics, Paleontolgists, and Mineralogists (SEPM)/Society of Exploration Geophysicists (SEG)/Society of Professional Well Log Analysts (SPWLA) Pacific Section annual meeting, Bakersfield, CA (United States), 6-8 Mar 1991; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
Similar Records
Geochronology, isotopic characteristics, and paleogeography of parts of the Salinian block of California
Late Cretaceous tectonics of the southern Sierra Nevada batholith (SNB) viewed from the Tehachapi Mountains (TM), California