塔里木盆地麦盖提斜坡构造样式分析

Structural pattern of the Maigaiti Slope in the Tarim Basin

史政 徐征遥

Shi Zheng Xun Zhengyao

中国石油化工股份有限公司 石油勘探开发研究院 无锡石油地质研究所, 江苏 无锡 214126 2. 中国石化 西北油田分公司 采油一厂, 新疆 轮台 841600

Wuxi Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China 2. No. 1 Oil Production Plant, SINOPEC Northwest Company, Luntai, Xingjiang 841600, China

麦盖提斜坡是塔里木盆地西南部的一个二级构造单元,经历多期构造变形作用,基底构造形迹或基底断裂带、多期构造运动和应力场转换、区域滑脱层等因素控制了构造变形及其迭加。从构造成因角度,其构造样式可划分为挤压构造、走滑(转换)构造、盐相关构造和岩浆岩构造等4大类,每大类还可进一步细分为多个亚类。多期的构造运动在形成新构造的同时,改造前期的构造,形成复杂多样的组合方式,剖面组合上划分为基底断层-膏盐岩增厚-背冲断层型、先存隆起-披覆背斜型、背冲断块潜山-披覆背斜型、岩浆底辟-披覆背斜型、基底卷入型断裂-反向/同向背冲盖层滑脱叠置型、走滑断裂-浅层盖层滑脱型及叠瓦状构造等7种类型。

The Maigaiti Slope is a secondary structural unit in the Tarim Basin, which underwent multiple tectonic movements. The stacking of structural deformation was controlled by basement structures or faults, multiple tectonic movements, stress field transition and regional detachment levels. According to the structural origin, the structural pattern in the study area can be divided into compressional, strike-slip, salt-related and magmatic structure, and each of them can be subdivided into several subtypes. The multiple tectonic movements led to the transformation of pre-existing structures and the formation of new structures. Various tectonic patterns were observed, including basement faults-increasing gypsum salt bed-back thrust, pre-existing uplift-draping anticline, pop-up block hill-draping anticline, magma diapir-draping anticline, basement-involved fault-synthetic/antithetic cap rock detachment, strike-slip fault-shallow detachment, and imbricate structure.

国家科技重大专项(2011ZX05002-003)资助。

https://doi.org/10.11781/sysydz201603333