Spatial Distribution of Depositional System and Evolution in Shiwu Rift Subsidence of Songliao Basin
Received date: 2009-09-16
Revised date: 2010-01-14
Online published: 2010-06-10
Based on drill core, logging, hole logging and seismic data, we discerned 8 types of sedimentary facies, such as alluvial fan and fan delta etc. and grouped 4 types of depositional system, including alluvial fan system, river\|delta system, underwater fan-fan delta system, lake-density flow system. The Shiwu rift subsidence was alluvial fan system at early phase. But at the period of Shahezi to Quantou, the depositional system type changed from alluvial fan system to underwater fan-fan delta system in the west fracture belt and the north steep slope belt, and from lake facies to braid delta-river faices in the southeast slow slope belt, and there is multiform sedimentary types in the middle part.
Key words: Depositional System; Evolution; Shiwu rift subsidence.
CHEN Xin-Jun, CHEN Ping-li . Spatial Distribution of Depositional System and Evolution in Shiwu Rift Subsidence of Songliao Basin[J]. Natural Gas Geoscience, 2010 , 21(3) : 470 -475 . DOI: 10.11764/j.issn.1672-1926.2010.03.470
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