A NUMERICAL SIMULATING RESEARCH ON NEOTECTONICS IN THE LOP NUR BASIN
-
摘要:
综合罗布泊盆地新构造研究相关成果, 运用数值模拟实验方法, 采用两种模型, 对罗布泊盆地新构造活动进行数值模拟研究, 直观展示盆地的应力状态与位移特征, 再现罗布泊盆地新构造变形序列, 查明运动学特征。数值模拟结果一方面展示出晚新生代以来罗布泊盆地先后主要经历了渐新世末期—早更新世晚期近南北向构造挤压作用控制下的盆地近东西向伸展断陷与早更新世晚期以来北东—南西向构造挤压作用导致的盆地剪切变形两大阶段; 另一方面实验结果也显示, 在两种边界条件的控制下, 研究区地质单元的应力状态主要受地层岩性和断裂共同控制, 盆地内部呈现低应力状态, 在与最大主压应力相垂直的方向上产生伸展变形。盆地南边的两条主干断裂内部具有较高的剪应力, 而罗布泊盆地及其以东地区剪应力最小。位移大小明显受断裂控制, 从南西向北东位移逐渐减小, 指示孔隙流体从南西向北东运移。
Abstract:Based on analysis of previous researches on neotectonic in Lop Nur Basin, two types of numerical simulation models have been built in this paper: ~N-S trending compression in first stage and NE-SW striking compression in the later stage. Combining with the previous studies, our numerical simulation shows the two main episodes of tectonic evolution occurred in the Lop Nur Basin since Late Cenozoic: (1) the ~N-S trending compression, the extension and rifting from late Oligocene to Early Pleistocene, and (2) the NE-SW striking compression and the shearing deformation since Early Pleistocene. Furthermore, the research shows the stress condition of the geological units is controlled both by lithology and faults; moreover, the low stress appears inside of the basin, and extensional direction is perpendicular to maximum principle compressive stress. The two main faults to the south of the basin are dominated by high shearing stress, whereas the minimal shearing stress distributes both in the basin and to its east. Furthermore, obviously controlled by faults, the displacement decreases from southwest to northeast, indicating the pore fluid migrates from southwest to northeast. This study provides some structural evidences for the research on sylvite forming and oil storage and transformation.
-
Key words:
- Lop Nur Basin /
- neotectonic /
- numerical simulation /
- Altyn Tagh fault zone /
- Tarim Basin
-
-
表 1 罗布泊盆地新构造构造数值模拟岩石力学参数
Table 1. ock mechanics parameter of Neotectonic numerical simulating in the Lop Nur Basin
下载: 导出CSV
表 2 罗布泊盆地新构造数值模拟边界条件
Table 2. Boundary condition for Neotectonic numerical simulating in the Lop Nur Basin
下载: 导出CSV
-
[1] 王弭力, 刘成林, 焦鹏程.罗布泊盐湖钾盐资源[M].北京:地质出版社, 2001: 17~19.
WANG Mi-li, LIU Cheng-lin, JIAO Peng-cheng. Saline lake poatsh resources in the Lop Nur, Xinjigang[M]. Bejing: Geological Publishing House, 2001: 17~19.
[2] 刘成林, 王弭力, 焦鹏程, 等.罗布泊第四纪卤水钾矿储层孔隙成因与储集机制研究[J].地质论评, 2002, 48 (4):437~443. http://www.cqvip.com/Main/Detail.aspx?id=6473493
LIU Cheng-lin, WANG Mi-li, JIAO Peng-cheng, et al. Formation of pores and brine reserving mechanism of the aquifers in Quanternary potash deposits in Lop Nur Lake, Xinjiang, China[J]. Geological Review, 2002, 48 (4):437~443. http://www.cqvip.com/Main/Detail.aspx?id=6473493
[3] 刘成林, 焦鹏程, 王弭力, 等.罗布泊第四纪含盐系成岩作用特征研究[J].沉积学报, 2003, 21 (2):240~246. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=cjxb200302008
LIU Cheng-lin, JIAO Peng-cheng, WANG Mi-li, et al. Characteristics of diagenesis is of the Quaternary salt-bearing strata, Lop Nur Lake, Xinjiang[J]. Acta Sedmentologica Sinica, 2003, 21 (2):240~246. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=cjxb200302008
[4] 刘成林, 焦鹏程, 王弭力, 等.罗布泊盐湖巨量钙芒硝沉积及其成钾效应分析[J].矿床地质, 2007, 26 (3):322~329. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=kcdz200703009
LIU Cheng-lin, JIAO Peng-cheng, WANG Mi-li, et al. Sedimentation of glauberite and its effect on potash deposits formation in Lop Nur salt lake, Xinjiang, China[J]. Mineral Deposits, 2007, 26 (3):322~329. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=kcdz200703009
[5] 孙雄, 洪汉净, 马宗晋.构造应力作用下流体运动的动力学分析[J].地球学报, 1998, 19 (2):150~157. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=dqxb802.006&dbname=CJFD&dbcode=CJFQ
SUN Xiong, HONG Han-jing, MA Zong-jin. The influence of structure stress on fluid movement[J]. Acta Geosicientia Sinica, 1998, 19 (2):150~157. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=dqxb802.006&dbname=CJFD&dbcode=CJFQ
[6] 曾海容, 宋惠珍.三维有限单元反演的数学方法[J].地质力学学报, 1998, 5 (1):45~49. http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=19990109&journal_id=dzlxxb
ZEN Hai-rong, SONG Hui-zhen. A study on 3-D finite element inverse model[J]. Journal of Geomechanics, 1998, 5 (1):45~49. http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=19990109&journal_id=dzlxxb
[7] 武红岭, 王小凤, 马寅生, 等.油田构造应力场驱动油气运移的理论和方法研究[J].石油学报, 1999, 20 (5):7~12. doi: 10.7623/syxb199905002
WU Hong-ling, WANG Xiao-feng, MA Yin-sheng, et al. Theory and method of studying hydrocarbon migration driven by tectonic stress field[J]. Acta Petrolei Sinica, 1999, 20 (5):7~12. doi: 10.7623/syxb199905002
[8] 武红岭, 施炜, 董树文, 等.大巴山前陆叠加构造力学特征的模拟研究[J].地学前缘, 2009, 16 (3):190~196. http://www.cqvip.com/Main/Detail.aspx?id=30731175
WU Hong-ling, SHI Wei, DONG Shu-wen, et al. A numerical simulating study of mechanical characteristic of superposed deformation in Daba Mountain Foreland[J]. Earth Science Frontiers, 2009, 16 (3):190~196. http://www.cqvip.com/Main/Detail.aspx?id=30731175
[9] 新疆维吾尔自治区地质矿产局.新疆维吾尔自治区区域地质志[M].北京:地质出版社, 1993: 1~816.
Bureau of Geology and Mineral Resources of Xinjiang Uighur Autonomous Region of China. Regional geology of Xinjiang Uighur Autonomous Region of China[M]. Beijing: Geological Publishing House, 1993: 1~816.
[10] 柏美祥.阿尔金活动断裂带的运动学和动力学特征[J].新疆地质, 1992, 10 (1):57~61. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=xjdi199201006&dbname=CJFD&dbcode=CJFQ
BAI Mei-xiang. Kinematic and dynamic characteristics of the Altun active fault zone[J]. Xinjiang Geology, 1992, 10 (1):57~61. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=xjdi199201006&dbname=CJFD&dbcode=CJFQ
[11] 范芳琴.阿尔金地区构造应力场研究[J].内陆地震, 1993, 7 (4):370~378. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=lldz199304008&dbname=CJFD&dbcode=CJFQ
FAN Fang-qin. Study on the tectonic stress field in Altun area[J]. Inland Earthquake, 1993, 7 (4):370~378. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=lldz199304008&dbname=CJFD&dbcode=CJFQ
[12] 谢富仁, 刘光勋.阿尔金断裂带中段区域新构造应力场分析[J].中国地震, 1989, 5 (3):26~36. http://www.cqvip.com/Main/Detail.aspx?id=184360
XIE Fu-ren, LIU Guang-xun. Analysis of neotectonic stress field in the area of the central segment of Altun fault zone, China[J]. Earthquake Research In China, 1989, 5 (3):26~36. http://www.cqvip.com/Main/Detail.aspx?id=184360
[13] 张岳桥, 陈正乐, 杨农.阿尔金断裂晚新生代左旋走滑位错的地质新证据[J].现代地质, 2001, 15 (1):9~12. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=xddz200101001&dbname=CJFD&dbcode=CJFQ
ZHANG Yue-qiao, CHEN Zheng-le, YANG Nong. New geological evidences for late Cenozoic left lateral displacement along the Altyn Tagh fault[J]. Geoscience, 2001, 15 (1):9~12. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=xddz200101001&dbname=CJFD&dbcode=CJFQ
[14] 陈正乐, 张岳桥, 王小凤, 等.新生代阿尔金山脉隆升历史的裂变径迹证据[J].地球学报, 2001, 22 (5):413~418. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqxb200105006
CHEN Zheng-le, ZHANG Yue-qiao, WANG Xiao-feng, et al. Fission track dating of apatite constrains on the Cenozoic uplift of the Altyn Tagh Mountain[J]. Acta Geosicientia Sinica, 2001, 22 (5):413~418. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqxb200105006
[15] 刘永江, Franz Neubauer, 葛肖虹, 等.阿尔金断裂带年代学和阿尔金山隆升[J].地质科学, 2007, 42 (1):134~146. http://en.cnki.com.cn/Article_en/CJFDTotal-DZKX200701015.htm
LIU Yong-jiang, Franz Neubauer, GE Xiao-hong, et al. Geochronology of the Altun fault zone and rising of the Altun Mountains[J]. Chinese Journal of Geology, 2007, 42 (1):134~146. http://en.cnki.com.cn/Article_en/CJFDTotal-DZKX200701015.htm
[16] Wang Q, Zhang P Z, Freymueller J, et al. Present-day crustal deformation of China constrained by global positioning system measurements[J]. Science, 2001, 294: 574~577. doi: 10.1126/science.1063647
[17] 中国地质调查局. 中国数字化地质图(1: 50万)[M]. 1999.
China Geological Survey. China digital geological map (1: 500000)[M]. 1999.
[18] 施炜, 刘成林, 杨海军, 等.基于砂箱模拟实验的罗布泊盆地新构造变形特征分析[J].大地构造与成矿学, 2009, 33 (4):529~534. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=ddgzyckx200904006
SHI Wei, LIU Cheng-lin, YANG Hai-jun, et al. Research on neotectonic of the Lop Nur Basin based on sandbox experiments[J]. Geotectonica et Metallogenia, 2009, 33 (4):529~534. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=ddgzyckx200904006
-
图(5)
表(2)
计量
- 文章访问数: 253
- PDF下载数: 2
- 施引文献: 0