Provenance System Characters of the Third Member of Shahejie Formation in the Paleogene in Beitang Sag
HUANG Chuan-yan
WANG Hua
ZHOU Li-hong
REN Pei-gang
LIU Jun
BAI Yun-feng
Abstract：Provenance analysis is an important aspect of basin analysis. Beitang sag is an important breakthrough zone for future exploration in Dagang oilfield with its wide range of lake, deep sediment thickness, and low level of exploration of the third member of Shahejie Formation (Es_3). Detailed depiction of the provenance system using of Es_3 is of practical significance for reconstructing depositional system and forecasting favorable areas. This paper analyzes in detail the provenance system of Es_3 in Beitang sag from various angles and levels: the source area and the deposition area is macroscopically distinguished according to tectonic framework and palaeogeomorphology; the source block is determined according to the characteristics of detrital mineral assemblage; the direction of transporting clastic fragmen in the basin is described according to seismic reflection characteristics; and the source branches are finely pictured according to sandstone thickness distribution map and percent distribution map The research results show that provenances originated from Yanshan fold belt and Cangxian uplift They are divided into western Cangxian source, north-west Hangu source, north Dashentang source and north-east Jiannan source. In the tectonic framework and the provenance system, there mainly developed fan-delta depositional system of Es_3 in Beitang sag.
Keywords：provenance analysissedimentation systemsedimentologyBeitang sagthe third member of Shahejie Formatioa
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 975-984 )