摘要
塔里木盆地北部隆起负反转构造带长达２００ｋｍ以上，宽１０～３０ｋｍ，位于南天山山前库车前陆拗陷的前缘隆起部位。主要负反转构造类型包括大型负反转断裂、反转掀斜断块和“垒堑叠加型”反转构造。塔北隆起大型负反转断裂经历了早期冲断和后期反转过程（如轮台和牙哈断裂带），往往有基底层序卷入。平衡剖面分析结果揭示，反转构造的主反转期为白垩纪—第三纪，塔北隆起北部圈闭形成期和油气成藏期与主反转期相对应。塔北隆起负反转构造带形成机制受先存基底构造形迹或软弱带及前陆拗陷前缘隆起部位局部引张应力场控制。塔北隆起负反转构造的存在不仅决定了油气藏的形成与分布特征，而且对于揭示中国西北地区构造变形类型和变形方式具有重要的地质意义。
The negative inversion
structure belts in northern uplift of the Tarim Basin are located at fore bulge of Kuche foreland
depression and elongate more than 200km long and 10～30km wide. The main styles of
negative inversion structures include major negative inversion faults, inversion tilted fault
blocks and horst graben type superimposed inversion structures. The major negative inversion
faults in northern Tarim uplift involved basement sequences ordinarily and experienced
thrusting in the stage of pre Cretaceous and inversion process since Cretaceous, just like
Luntai and Yaha fault belts. The results of balanced cross section analysis indicate that the
main inversion phase may be Cretaceous Tertiary, which match the stage of trap and oil gas
pool formation. The genetic mechanism of negative inversion structures of northern Tarim uplift
are controlled by pre existing basement weak zone and local extensional stress field resulting
from the bent upward of fore bulge. The formation and distribution of oil gas pools in northern
Tarim uplift are controlled by negative inversion structures which are with important
significance for revealing structural deformation type and pattern in the northwest China.
出处
《现代地质》
CAS
CSCD
北大核心
1999年第1期93-98,共6页
Geoscience
基金
中国博士后科学基金
关键词
负反转
负反转构造
主反转期
塔里木盆地
隆起
negative inversion, negative inversion structure, main inversion phase, the Tarim
Basin
