基于地球物理资料的宁夏南部地区断裂格架特征分析

doi:10.11720/wtyht.2023.1379

摘要
图/表
参考文献
相关文章
Metrics

全文: PDF(14903 KB) HTML
输出: BibTeX | EndNote (RIS)

摘要

宁夏南部地区处于典型黄土塬地区,其内展布5条构造单元分区断裂,均呈半隐伏—半裸露状态。以区域大地构造为依据,根据地层出露状况,梳理了研究区地球物理异常场分布特征,理清了断裂隐伏段的展布形态及各条断裂的相互关系,确立了宁夏南部地区断裂格架。在1:20万区域重力与区域航磁资料的基础上,综合利用小波多尺度分解技术与边界识别方法,提取反映断裂的深部重磁异常弱信号,并与MT剖面刻画的深部断裂进行对比。结果显示:研究区的5条主要断裂体现为重力2阶小波细节场中明显的重力高异常条带的边界。牛首山—罗山—崆峒山断裂是SN向长条状重力异常与NW向片状、带状重力异常的分界,具有典型的右行走滑特征,为阿拉善微陆块与鄂尔多斯地块的分界断裂;海原断裂在深部一分为二,海原Ⅰ号断裂隐伏于海原盆地内,无重力异常显示,航磁异常场分区特征明显,海原Ⅱ号断裂裸露于南华山、西华山东北麓,显示出清晰的线性重力异常特征,航磁异常微弱,2条断裂共同构成了北祁连早古生代造山带与阿拉善微陆块的复合边界;阿拉善微陆块内部的天景山断裂、烟筒山—窑山断裂与罗山东麓断裂表现为弧形重力高值异常带的东北边界。

	服务

	把本文推荐给朋友
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	虎新军
	陈晓晶
	仵阳
	白亚东
	赵福元

关键词 ：宁夏南部, 地球物理异常, 小波分解, 断裂格架, 海原断裂

Abstract：

Southern Ningxia, located in a typical loess tableland area, hosts five semi-concealed - semi-exposed faults as boundaries of tectonic units. Based on the regional geotectonic conditions and outcrops, this study analyzed the distribution of the geophysical anomaly field in the study area, ascertained the distribution morphology of the concealed fault sections and the relationship between the faults, and established the fault framework in southern Ningxia. Based on the 1:200000 regional gravity and aeromagnetic data, this study extracted the weak signals of deep gravity and magnetic anomalies reflecting faults using both the multi-scale wavelet decomposition technique and the boundary recognition method and compared these signals with the deep faults depicted based on MT profiles. The results show that the five major faults in the study area are the boundaries of the significant gravity high anomaly zones in the detailed second-order wavelet field of gravity. The Niushoushan-Luoshan-Kongtongshan fault is the boundary between the north-south-trending long strip-shaped gravity anomalies and the north-west-trending flaky and banded gravity anomalies. This fault has typical dextral strike-slip characteristics and is the boundary fault between the Alxa microcontinent and the Ordos block. The Haiyuan fault is divided into Haiyuan faults Nos. 1 and 2 at depth. The No. 1 Haiyuan fault is concealed in the Haiyuan Basin and does not exhibit gravity anomalies. Moreover, the aeromagnetic anomaly field of this fault has significant zoning characteristics. The No. 2 Haiyuan fault is exposed at the northeastern feet of the northern and southern Mount Huashan and exhibits distinct characteristics of linear gravity anomalies but weak aeromagnetic anomalies. The two faults jointly constitute the composite boundary between the Early Paleozoic North Qilian Orogenic Belt and the Alxa microcontinent. Three faults in the Alxa microcontinent, namely the Tianjingshan fault, the Yantongshan-Yaoshan fault, and the fault at the eastern piedmont of Luoshan, are present as the northeastern boundary of the arcuate high-amplitude gravity anomaly zone.

Key words： southern Ningxia geophysical anomaly wavelet decomposition fault framework Haiyuan fault

收稿日期: 2022-08-02 修回日期: 2022-10-24 出版日期: 2023-08-20

ZTFLH:

P631

基金资助:宁夏深部探测方法研究示范创新团队项目(KJT2019005);宁夏财政项目(NXCZ20220206)

通讯作者: 陈晓晶(1990-),女,工程师,从事应用地球物理勘探、地热地质特征研究工作。Email:825785150@qq.com

作者简介: 虎新军(1987-),男,工程师,从事地球物理勘探、区域构造体系研究工作。Email:junyan_home@126.com

引用本文:

虎新军, 陈晓晶, 仵阳, 白亚东, 赵福元. 基于地球物理资料的宁夏南部地区断裂格架特征分析[J]. 物探与化探, 2023, 47(4): 916-925.
HU Xin-Jun, CHEN Xiao-Jing, WU Yang, BAI Ya-Dong, ZHAO Fu-Yuan. An analysis of the fault framework in southern Ningxia based on geophysical data. Geophysical and Geochemical Exploration, 2023, 47(4): 916-925.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2023.1379 或 https://www.wutanyuhuatan.com/CN/Y2023/V47/I4/916

Fig.1 宁夏南部地质构造
1—第四系风积层;2—第四系洪积层;3—新近系;4—古近系;5—白垩系;6—侏罗系;7—三叠系;8—石炭系;9—泥盆系;10—志留系;11—奥陶系;12—寒武系;13—元古宇;14—裸露断层;15—隐伏断层;16—MT剖面

Fig.2 布格重力异常
1—重力高异常;2—重力低异常

Fig.3 化极航磁异常
1—航磁高异常;2—航磁低异常

Fig.4 牛首山—罗山断裂综合分析
a—垂向二阶导数;b—斜导数;c—断裂分布

Table 1 牛首山—罗山断裂展布特征

Fig.5 海原断裂与香山南麓断裂重力场特征
a—重力小波1阶细节场;b—重力小波2阶细节场;c—重力小波3阶细节场;d—重力小波4阶细节场

Fig.6 海原断裂磁场特征
a—航磁小波1阶细节场;b—航磁小波2阶细节场;c—航磁小波3阶细节场;d—航磁小波4阶细节场

Fig.7 海原断裂电性特征

Fig.8 海原断裂空间展布

Fig.9 宁夏南部断裂格架
a—断裂解释;b—断裂展布

[1]	徐占海, 李捍国, 宋新华, 等. 中国区域地质志/宁夏志[M]. 北京: 地质出版社, 2017.
[1]	Xu Z H, Li H G, Song X H, et al. Regional geology of China,Ningxia[M]. Beijing: Geological Publishing House, 2017.
[2]	杜远生, 朱杰, 韩欣, 等. 从弧后盆地到前陆盆地—北祁连造山带奥陶纪—泥盆纪的沉积盆地与构造演化[J]. 地质通报, 2004, 23(9/10):911-917.
[2]	Du Y S, Zhu J, Han X, et al. From the Back-arc basin to foreland basin-Ordovician-Devonian sedimentary basin and tectonic evolution in the North Qilian Orogenic Belt[J]. Geological Bulletin of China, 2004, 23(9/10):911-917.
[3]	刘亢, 曹代勇, 徐浩, 等. 鄂尔多斯煤盆地西缘古构造应力场演化分析[J]. 中国煤炭地质, 2014, 26(8):87-90.
[3]	Liu K, Cao D Y, Xu H, et al. Paleotectonic stress field evolutional analysis in west margin of Ordos Coal Basin[J]. Coal Geology of China, 2014, 26(8):87-90.
[4]	汤桦, 白云来, 房乃珍, 等. 鄂尔多斯盆地西部“古陆梁”的形成和演化[J]. 甘肃地质, 2006, 15(1):3-9.
[4]	Tang H, Bai Y L, Fang N Z, et al. Forming and evolution of ancient land rise in the Western Ordos Basin[J]. Gansu Geology, 2006, 15(1):3-9.
[5]	汤锡元, 郭忠铭, 王定一. 鄂尔多斯盆地西部逆冲推覆构造带特征及其演化与油气勘探[J]. 石油与天然气地质, 1988, 9(1):1-10.
[5]	Tang X Y, Guo Z M, Wang D Y. The characteristics and evolution of the thrust nappe tectonic belt and its petroleum potential in the West Ordos Basin[J]. Oil and Gas Geology, 1988, 9(1):1-10.
[6]	翟明国. 华北克拉通构造演化[J]. 地质力学学报, 2019, 25(5):722-745.
[6]	Zhai M G. Tectonic evolution of the North China Craton[J]. Journal of Geomechanics, 2019, 25(5):722-745.
[7]	吴文忠, 马瑞赟, 潘进礼, 等. 宁夏西吉盆地花岗岩地球化学特征、锆石U-Pb年龄及其地质意义[J]. 地质通报, 2018, 37(7):1271-1278.
[7]	Wu W Z, Ma R Y, Pan J L, et al. Geochemical characteristics and Zircon U-Pb ages of the granite in Xiji Basin of Ningxia[J]. Geological Bulletin of China, 2018, 37(7):1271-1278.
[8]	杨勇, 闫国祥. 宁夏西吉盆地磁异常带综合地球物理特征及其地质认识[J]. 西部探矿工程, 2017(4):129-132.
[8]	Yang Y, Yan G X. Comprehensive geophysical characteristics and geological understanding of magnetic anomaly zone in Xiji Basin[J]. West-China Exploration Engineering, 2017(4):129-132.
[9]	宋新华, 张鹏川, 程建华, 等. 六盘山盆地时空演化与岩盐成矿[M]. 北京: 地质出版社, 2015.
[9]	Song X H, Zhang P C, Cheng J H, et al. Temporal and spatial evolution and salt mineralization in Liupanshan Basin[M]. Beijing: Geological Publishing House, 2015.
[10]	张磊. 六盘山盆地白垩系沉积构造演化及原型盆地研究[D]. 东营: 中国石油大学(华东), 2009.
[10]	Zhang L. The depositional evolution and tertiary tectonic and reconstruction of the cretaceous proto-type basin in Liupanshan Basin[D]. Dongying: China University of Petroleum(East China), 2009.
[11]	汤济广, 梅廉夫, 李祺, 等. 六盘山盆地构造演化及对成藏的控制[J]. 石油天然气学报, 2009, 31(5):1-6.
[11]	Tang J G, Mei L F, Li Q, et al. Tectonic evolution and its control on reservoir formation in Liupanshan Basin[J]. Journal of Oil and Gas Technology, 2009, 31(5):1-6.
[12]	舒志国. 六盘山盆地西缘逆掩推覆构造的发现与油气地质意义[J]. 石油天然气学报, 2007, 29(3):176-177.
[12]	Shu Z G. Discovery of overridden structure in the western margin of Liupanshan Basin and it’s geologic significance of oil and gas[J]. Journal of Oil and Gas Technology, 2007, 29(3):176-177.
[13]	施玮, 张岳桥, 马寅生, 等. 六盘山盆地形成和改造历史及构造应力场演化[J]. 中国地质, 2006, 33(5):1066-1074.
[13]	Shi W, Zhang Y Q, Ma Y S, et al. Formation and modification history of the Liupanshan Basin on the southwestern margin of the Ordos Block and tectonic stress field evolution[J]. Geology in China, 2006, 33(5):1066-1074.
[14]	赵国泽, 詹艳, 王立凤, 等. 鄂尔多斯断块地壳典型结构[J]. 地震地质, 2010, 32(3):345-359.
[14]	Zhao G Z, Zhan Y, Wang L F, et al. Electric structure of the crust beneath the Ordos Fault Block[J]. Seismology and Geology, 2010, 32(3):345-359.
[15]	李斌. 鄂尔多斯盆地西部冲断带构造与控油气因素研究[D]. 西安: 西北大学, 2019.
[15]	Li B. Thrust structure and its effect on hydrocarbon in the western margin of Ordos Basin[D]. Xi’an: Northwest University, 2019.
[16]	李天斌. 宁夏南部弧形推覆构造带特征及演化[J]. 地质力学学报, 1999, 5(3):22-27.
[16]	Li T B. The feature and formation mechanism of arciform thrust-nappe structure zone of the southern Ningxia[J]. Journal of Geomechannics, 1999, 5(3):22-27.
[17]	白亚东, 安百州, 张海波, 等. 宁夏区内北祁连构造带与鄂尔多斯地块边界探讨[J]. 物探化探计算技术, 2017, 39(5):587-597.
[17]	Bai Y D, An B Z, Zhang H B, et al. A discussion of the north Qilian structural in Ningxia and Ordos Block Boundary[J]. Computing Techniques for Geophysical and Geochemical Exploration, 2017, 39(5):587-597.
[18]	俞岗, 尹功明, 王旭龙. 香山—天景山断裂活动时代的光释光测年[J]. 华南地震, 2013, 33(4):87-92.
[18]	Yu G, Yin G M, Wang X L. Optical dating of the Xiangshan-Tianjingshan Fault[J]. South China Journal of Seismology, 2013, 33(4):87-92.
[19]	王伟涛, 张培震, 雷启云. 牛首山—罗山断裂带的变形特征及其构造意义[J]. 地震地质, 2013, 35(2):195-207.
[19]	Wang W T, Zhang P Z, Lei Q Y. Deformational characteristics of the Niushoushan-Luoshan fault zone and its tectonic implications[J]. Seismology and Geology, 2013, 35(2):195-207.
[20]	郑文俊, 张博繯, 袁道阳, 等. 阿拉善地块南缘构造活动特征与青藏高原东北缘向外扩展的最新边界[J]. 地球科学与环境学报, 2021, 43(2):224-236.
[20]	Zheng W J, Zhang B X, Yuan D Y, et al. Tectonic activity in the southern Alashan Block and the latest boundary of outward expansion on the Northeastern Tibetan Plateau,China[J]. Journal of Earth Sciences and Environment, 2021, 43(2):224-236.
[21]	王勇, 施玮. 六盘山盆地白垩纪构造变形分析及其盆地形成演化[J]. 煤炭技术, 2007, 26(11):101-104.
[21]	Wang Y, Shi W. Analysis of structural deformation of Liupanshan Basin and basin formation and Changing[J]. Coal Technology, 2007, 26(11):101-104.
[22]	李宁生, 冯志民, 朱秦, 等. 宁夏区域重磁资料开发利用研究[M]. 北京: 地质出版社, 2016.
[22]	Li N S, Feng Z M, Zhu Q, et al. Development and utilization of gravity and magnetic data in Ningxia area[M]. Beijing: Geological Publishing House, 2016.
[23]	尹秉喜, 闵刚. 宁夏中上地壳结构特征研究[M]. 宁夏: 宁夏人民出版社, 2014.
[23]	Yin B X, Min G. Study on the structural characterristics of the middle and upper crust in NingXia[M]. NingXia: Ningxia People’s Publishing House, 2014.
[24]	金胜, 张乐天, 金永吉, 等. 青藏高原东北缘合作—大井剖面地壳电性结构研究[J]. 地球物理学报, 2012, 55(12):3979-3990.
[24]	Jin S, Zhang L T, Jin Y J, et al. Crustal electrical structure along the Hezuo-Dajing profile across the northeastern margin of the Tibetan Plateau[J]. Chinese Journal of Geophysics, 2012, 55(12):3979-3990.

[1]	虎新军, 陈晓晶, 李宁生, 仵阳, 陈涛涛. 银川盆地东缘黄河断裂展布特征新认识[J]. 物探与化探, 2021, 45(4): 913-922.
[2]	高四新, 吴宏伟, 赵强, 王录林, 张学忠. 内蒙古布航特一带物化探异常特征及找矿效果[J]. 物探与化探, 2014, 38(4): 688-692.
[3]	刘苗, 吴健生, 于鹏, 张罗磊. 基于二维小波分解的MT二维反演方法[J]. 物探与化探, 2009, 33(3): 337-341.
[4]	刘明军, 李松林, 张先康, 樊计昌, 宋占龙. 海原断裂带断层通道波观测与破碎带宽度[J]. 物探与化探, 2004, 28(6): 549-552.
[5]	王瑞廷. 秦岭造山带泥盆系(陕西段)主要金矿床地球物理地球化学异常特征及找矿标志[J]. 物探与化探, 1999, 23(1): 14-20.

Viewed

Full text

Abstract

Cited

Shared

Discussed