Seismic Evidence of Tectonic Influence on Development of Cretaceous Listric Normal Faults, Boulder-Wattenberg-Greeley Area, Denver Basin, Colorado

T. Davis
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引用次数: 2

Abstract

Reflection seismic studies in the Denver basin near Greeley, Colorado, illustrate an association between listric normal faults (which sole out in detachment or decollement zones) and basement-controlled faults. Recurrent movement on basement-controlled faults triggered development of listric normal faults in tectonically sensitive stratigraphic intervals of the Cretaceous. Stratigraphic intervals exhibiting listric normal faults include the Cretaceous Laramie-Fox Hills-Upper Pierre, Middle Pierre Hygiene zone, and the Niobrara-Carlile Greenhorn. Listric normal faults are prevalent on the flank of a fault-bounded basement-controlled paleostructural block termed the Wattenberg block by Weimer and Sonnenberg (1982). Listric normal faults influence Cretaceous reservoir systems in the Hambert field area on the north flank of the Wattenberg-Greeley Lineament Zone.
科罗拉多丹佛盆地Boulder-Wattenberg-Greeley地区白垩纪板块正断层发育的地震证据
在科罗拉多州格里利附近的丹佛盆地进行的反射地震研究表明,表面正断层(在剥离带或滑脱带中单独存在)与基底控制的断层之间存在联系。在构造敏感的白垩纪地层层段,基底控制断裂的反复性运动引发了盘状正断层的发育。表现出表状正断层的地层层段包括白垩纪Laramie-Fox Hills-Upper Pierre、Middle Pierre卫生带和Niobrara-Carlile Greenhorn。在一个被Weimer和Sonnenberg(1982)称为Wattenberg地块的断界基底控制的古构造地块的侧翼上普遍存在着盘状正断层。盘状正断层影响着Wattenberg-Greeley界线带北侧Hambert地区白垩系储层体系。
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