塔里木盆地库车坳陷收缩构造变形模型若干问题的讨论
The interpretation models and discussion on the contractive structure deformation of Kuqa Depression, Tarim Basin
-
摘要: 提要：塔里木盆地库车坳陷中、新生界表现出以逆冲断层、纵弯褶皱为基本结构要素的收缩构造变形特征。本文依据地质－地球物理勘探资料，建立了“薄皮收缩构造”和“分层收缩构造”两种模型，讨论了不同构造变形模型的几何结构、收缩变形量、构造动力学机制等方面的差异，并认为“分层收缩构造模型”更为合理。“分层收缩构造模型”强调塔里木克拉通与南天山之间的侧向挤压，中、新生界受岩层能干性影响而发生分层收缩构造变形，新生界以伴生有破冲断层的滑脱褶皱变形为主，中生界以逆冲断层及相关褶皱变形为主，深层发育基底卷入的逆冲断层和断块构造，但是不同层次的收缩变形量基本保持一致。按照平衡剖面原理测算库车坳陷新生界的收缩量为12～15 km，卷入收缩构造变形的深度在山前应该为20～26 km，因此部分逆冲断层应该切割到盆地基底中。尽管变形强度总体上是自深而浅、自造山带向前陆逐渐减弱，作为浅层强变形的秋里塔格构造带的深层也可能发育一定程度的收缩构造变形，构成深层的油气圈闭。Abstract: Abstract：The basic characteristics of structural deformation in Kuqa Depression of, Tarim Basin is contractive structural deformation, owing to the development of a lot of thrusts and buckling folds in Mesozoic and Cenozoic strata. This paper establishes two types of model for interpreting the contractive structural deformation in Kuqa Depression based on the structural features interpreted from geological outcrop, seismic data, well-log and CEMP（Continuous Electromagnetic Profile） data, and discusses their differences in geometry, shortening extent and dynamics. One model is the “skin-contractive deformation”, a typical “A-type” subduction model. The other is the “delaminate contractive deformation”, in which both the sedimentary cover and the basement of the depression are involved in contractive deformation in respective styles, with no real regional detachment fault developed. The “delaminate contractive deformation” is considered to be more reasonable so far as the data and theoretical concepts are concerned. The model emphasizes that Cenozoic, Mesozoic and basement decoupled under lateral pressure between Tarim craton and South Tianshan Mountain affected by the capability of the strata, Cenozoic was dominated by detachment folds with break thrusts, Mesozoic was dominated by thrusts with related folds, and the basement was dominated by thrusts and faulted blocks. The shortening extents at the bottom of Cenozoic, the upper of Mesozoic and the basement of the depression are basically identical. The shortening extent ranges from 12km to15km according to length balance of Cenozoic bottom, and the depth involved in contractive deformation ranges from 20km to 26km in the front of South Tianshan Mountain according to excess area of Mesozoic in sectional plane. Therefore, the basement of the depression is uplifted in the north and is involved in the thrust. Although the intensity of contractive deformation gradually decreases from mountain to foreland and from the shallow part to the depth in theory, the Mesozoic and basement under the salt rock of Eocene in Qiulitag structural zone might still be involved in contractive structure deformation owing to a tight-closed anticline at the shallower level. The structure is trapped at the deeper level.
-
-
期刊类型引用(16)
1. 牛文治，何付兵，沙春梅，张悦泽，刘振华. 北京平原区南苑—通县断裂南西段结构特征和活动性. 科学技术与工程. 2024(18): 7552-7562 . 
百度学术
2. 赵勇，李瑞杰，杨誉博，王纯君，杨吉龙，王强，李莉. 上新世以来北京平原NBT1孔记录的地层沉积及构造指示. 地质学报. 2023(02): 553-564 . 百度学术
3. 田苗壮，赵龙，崔文君，郭高轩，刘贺，孙爱华，王新惠，陈航，吴盼. 南水北调背景下地下水位上升对地面沉降控制与影响——以北京潮白河地下水系统为例. 中国地质. 2023(03): 872-886 . 本站查看
4. 卫蕾华，贺为民. 河南平原濮阳市BK1钻孔第四纪地层划分和环境演化. 地层学杂志. 2023(02): 191-200 . 百度学术
5. 代鹏，邓晓红，王盛栋，张全. 永定河冲积平原南部第四纪年代地层划分及沉积速率特征. 地质通报. 2022(Z1): 253-261 . 百度学术
6. 白凌燕，张磊，张悦泽，张晓亮，王凯，何付兵. 后沙峪凹陷第四纪高精度地层格架及地质意义. 科学技术与工程. 2022(18): 7780-7788 . 百度学术
7. 田苗壮，罗勇，崔文君，雷坤超，田芳，杨艳. 南水北调背景下北京地面沉降发展变化特征. 上海国土资源. 2022(04): 44-49 . 百度学术
8. 赵勇. 冲-洪积平原1∶5万区域地质调查技术方法探索. 中国地质调查. 2021(01): 60-70 . 百度学术
9. 王超群，贾丽云，胡道功，马秀敏，顾静超，丁莹莹，曹新文，夏蒙蒙，吴环环. 海南岛北部马袅—铺前断裂东段活动性与地壳稳定性评价. 中国地质. 2021(02): 618-631 . 本站查看
10. 周永恒，杨肖肖，丰成君，张鹏，孟静，谭成轩，邓亚虹，宋焱勋，王继明. 北京平原区黄庄—高丽营断裂(房山—涞水段)第四纪活动特征的浅层综合探测证据. 地球学报. 2021(05): 677-689 . 百度学术
11. 李瑞杰，魏波，赵勇. 北京庞各庄幅1:50000区域地质调查数据集. 中国地质. 2021(S2): 90-99 . 本站查看
12. 卫蕾华，贺为民，张洋，宋晓鹏，张峰，刘露洋，杨杰. 驻马店市第四纪地层研究. 地层学杂志. 2020(02): 191-199 . 百度学术
13. 陈圆圆，卜令，专少鹏，杨瑞，赵华平，季虹，陈超，陈宏强. 河北省1:50000沙流河幅第四系钻孔数据库. 中国地质. 2020(S1): 125-147 . 本站查看
14. 何付兵，崔玉斌，刘振华，栾英波，牛文治，王凯，马学利. 北京平谷马坊ZK09钻孔新生代地层格架及其地质意义. 科学技术与工程. 2020(25): 10151-10159 . 百度学术
15. 李巧灵，雷晓东，李晨，冉伟彦，杨全合，何祎. 微动测深法探测厚覆盖层结构——以北京城市副中心为例. 地球物理学进展. 2019(04): 1635-1643 . 百度学术
16. 田苗壮，王荣，赵龙，罗勇，王新惠，孔祥如，齐鸣欢，沙特. 高密度电法在北京宋庄地裂缝中的应用. 上海国土资源. 2017(03): 90-93 . 百度学术
其他类型引用(4)
计量
- 文章访问数:
- HTML全文浏览量: 0
- PDF下载量:
- 被引次数: 20
下载:
