返回Google圖書搜尋

Lineament tectonics of central Montana

出版	Purdue University, GEOS, 1980
URL	http://books.google.com.hk/books?id=16QzNAAACAAJ&hl=&source=gbs_api

註釋Surface and subsurface geological data of Central Montana has been examined and compared with linear and circular features mapped on Landsat imagery to investigate the influence of lineaments to paleodeposition and their importance to oil and gas exploration. Startigraphy, structure, and geophysical data show that Central Montana consists of a mosaic of Precambrian basement blocks at different depths. Vertical and/or horizontal movements of these blocks have caused differential deposition and folding of the overlying sedimentary sequence. General structural trends as known from previous investigations , and generated in this study from structural and geophysical data show distinct northwest and northeast directions. Oil and gas deposits ofCentral Montana are closely related to stratigraphical and structural traps determined by this block pattern. Lineaments mapped on Landsat imagery form a dense network. Individual lineaments do not coincide fully with structural andgeophysical faults of the area. However, their statistical distribution show similar northeast and northwest trends. Landsat identified circular features coincide fairly well with subsurface structures as presented on subsurface structural maps and with known magnetic anomalies.