The Implication Of Basin For Several Provenances

Aiming at the blankness of indication for provenance that is the indications of basin for several provenances, takeing the south of songliao basin during Qing Shan Kou term and Yao Jia term as an example. On the basic of the research for sequence stratigraphy, with system tract as an unit,this paper carry out the indications of basin for several provenances. Five sequences and twelve system tracts are identified which are corresponding to five main allowable space and twelve subordinate allowable space separately. The reseach of sedmimentary character indicate there are three provenances which are corresponding to Three sedimentary systems and there are five water systems, Zhen Lai water system and bai cheng water system are emanated from Da Ming an mountain ,forming the zhenlai delta and Bai Cheng delta when they entered the basin ,Baokang water system and tongyu water system are emanated from Gu Tie Fa hill,forming the BaoKang delta and Tong Yu delta when they entered the basin,Chang Chun-HuaiDe water system is emanated from paleo Zhang Guang Cai mountain forming the ChangChun-Huai De delta when it entered the basin. The rule oboui the evloution of sedimentary system is that the evolution of paleo-current systems and deltas were corresponding to the rise and fall of lake which changed periodically in the mean time they were controled by the upshift of corresponding provenance respectively.The host rocks of these provenance are acid rock and basic rock and metamorphic rock separately.The indication of paleoclimate show that high frequency sequences of this region were controlled by paleoclimate cycle which was caused by Milankovitch orbit cycle. The research result of plate tectonic setting show that the plate tectonic environment of the Da Hing an mountain, Gu Tie Fa hill and Paleo Zhang Guang Cai mountain when it formed was orogen caused by collision which was influnced by arc,continental arc and orgen caused by collision which was not influnced by arc seperately. Aiming at the character of this region ,According to the rule of quality reservation ,on the basis of construction of a mathematics mode,this paper proposed a way by means of which we can reconstruct the paleotopography of provenances.Using this method the reserch result show the upshift history of the west provenance consist of three terms,that is ladder and jumping-mode increasing , ladder-mode decreasing and ladder-mode increasing .The orogeny process is composed by the first orogen term,the...