干旱区生态环境知识资源中心(Arid): Fault tectonics and earthquake hazards in parts of southern California. [penninsular ranges, Garlock fault, Salton Trough area, and western Mojave Desert]

Arid

报告编号	E76-10337, NASA-CR-144477
来源ID	NTRS_Document_ID: 19760016574
	Fault tectonics and earthquake hazards in parts of southern California. [penninsular ranges, Garlock fault, Salton Trough area, and western Mojave Desert]
	Lamar, D. L.; Gazley, C., Jr.; Lamar, J. V.; Stratton, R. H.
英文摘要	The author has identified the following significant results. Four previously unknown faults were discovered in basement terrane of the Peninsular Ranges. These have been named the San Ysidro Creek fault, Thing Valley fault, Canyon City fault, and Warren Canyon fault. In addition fault gouge and breccia were recognized along the San Diego River fault. Study of features on Skylab imagery and review of geologic and seismic data suggest that the risk of a damaging earthquake is greater along the northwestern portion of the Elsinore fault than along the southeastern portion. Physiographic indicators of active faulting along the Garlock fault identifiable in Skylab imagery include scarps, linear ridges, shutter ridges, faceted ridges, linear valleys, undrained depressions and offset drainage. The following previously unrecognized fault segments are postulated for the Salton Trough Area: (1) An extension of a previously known fault in the San Andreas fault set located southeast of the Salton Sea; (2) An extension of the active San Jacinto fault zone along a tonal change in cultivated fields across Mexicali Valley ( the tonal change may represent different soil conditions along opposite sides of a fault). For the Skylab and LANDSAT images studied, pseudocolor transformations offer no advantages over the original images in the recognition of faults in Skylab and LANDSAT images. Alluvial deposits of different ages, a marble unit and iron oxide gossans of the Mojave Mining District are more readily differentiated on images prepared from ratios of individual bands of the S-192 multispectral scanner data. The San Andreas fault was also made more distinct in the 8/2 and 9/2 band ratios by enhancement of vegetation differences on opposite sides of the fault. Preliminary analysis indicates a significant earth resources potential for the discrimination of soil and rock types, including mineral alteration zones. This application should be actively pursued.
英文关键词	EARTHQUAKES GEOLOGICAL FAULTS MOJAVE DESERT (CA) PENINSULAR RANGES (CA) SALTON SEA (CA) SOUTHERN CALIFORNIA TECTONICS EREP LANDSAT SATELLITES MULTISPECTRAL PHOTOGRAPHY SKYLAB PROGRAM
出版年	1976
报告类型	Technical Report
语种	英语
国家	美国
URL	http://hdl.handle.net/2060/19760016574
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/258640
推荐引用方式 GB/T 7714	Lamar, D. L.,Gazley, C., Jr.,Lamar, J. V.,et al. Fault tectonics and earthquake hazards in parts of southern California. [penninsular ranges, Garlock fault, Salton Trough area, and western Mojave Desert],1976.