Basement Structural Features of Mesozoic Volcanic Basins in Erguna Massif:Implications from Lingquan Basin
Zhang Li
Liu Yongjiang
Feng Zhiqiang
Li Weimin
Wen Quanbo
Liang Chenyue
Huan Hengfei
Meng Jingyao
Zhou Jianping
Yang Zhengyong
Abstract：Characteristics of Bouguer gravity anomaly in the Lingquan basin indicate that lower gravity region on both sides of the basin is mainly the Jurassic-Cretaceous fault zone,the center is mainly a basement uplift.The upward continuation of the gravity anomaly is carried out,the results show that the upper surface of deep geological bodies has the characteristics of "east, west deep and center shallow";the residual gravity anomaly also indicates that the local gravity of the central region mainly re-flects the basement uplift,and the lower gravity of the eastern and western regions mainly reflects the fault of the Jurassic-Cretaceous.The basement faults of the Lingquan basin mainly are north and north-east,secondly is northwest,there are also early near north-south and east-west faults.The tectonic unit of the Lingquan basin is divided into the western fault zone,the central uplift zone and the eastern fault zone,we find that the Lingquan basin is actually an uplift rather than a graben basin, this is the result of tectonic inversion in the basin,other Mesozoic volcanic basins in the Erguna massif also have this model, and its basement is characterized by "shallow south deep north".
Keywords：Erguna massifLingquan basingravity anomalybasement structuregeophysics
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：14( 2229-2242 )