An Ultra‐Deep Paleokarst System in the Ordovician, North‐Central Tarim Basin, China: Outcrop analog and synthetic seismic models

• DOI: 10.1190/1.3513132
• Publication Date: 2010-11-03T18:42:18Z
• Authors: Xavier Janson; Hongliu Zeng; Bob Loucks; Quizhong Wang; Chunyang Wang; Shunxin Li; Tao Yang; Yiping Xia; Ligui Xu
• Keywords: Tarim basin; Outcrop

Exposed Ordovician strata in the western Tarim Basin Northeastern China show a karst system that consists of towers and paleocave breccias. These outcrops are used to build 3D geocellular model synthetic seismogram. The low impedance breccias create distinctive high amplitude seismic anomalies below unconformity reflection. A larger is built with top surface mapped subsurface randomly distributed ellipses simulate paleocaves. resulting seismograms realistic reflection character geometries. Impedance 150 m 250 wide by at least 20m thick paleocaves 175 % contrast between host rock results seismogram mimic observed data.