吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (2): 511-525.doi: 10.13278/j.cnki.jjuese.201702115

• 地质与资源 • 上一篇    下一篇

印支地块思茅地区始新统磁倾角偏低现象及其构造意义

安纯志1,2, 杨振宇3, 仝亚博1,2, 李晨皓1,2, 王恒1,2, 高亮1,2, 韩志锐1,2, 徐颖超1,2   

  1. 1. 中国地质科学院地质力学研究所, 北京 100081;
    2. 国土资源部古地磁与古构造重建重点实验室, 北京 100081;
    3. 首都师范大学资源环境与旅游学院, 北京 100048
  • 收稿日期:2016-12-23 出版日期:2017-03-26 发布日期:2017-03-26
  • 通讯作者: 杨振宇(1963-),男,博士,教授,博士生导师,杰青,主要从事古地磁与大地构造学研究,E-mail:yangzhenyu@cags.ac.cn E-mail:yangzhenyu@cags.ac.cn
  • 作者简介:安纯志(1987-),男,研究生,主要从事古地磁与古地理研究,E-mail:ancz1987@163.com
  • 基金资助:
    中国地质调查局地质调查项目（1212011120164，12120114002301）；国家自然科学基金项目（41202162）

Eocene Paleomagnetic Inclination Shallowing in Simao Area of the Indochina Block and Its Tectonic Implication

An Chunzhi1,2, Yang Zhenyu3, Tong Yabo1,2, Li ChenHao1,2, Wang Heng1,2, Gao Liang1,2, Han Zhirui1,2, Xu Yingchao1,2   

  1. 1. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;
    2. Key Laboratory of Paleomagnetism and Tectonic Reconstruction of Ministry of Land and Resources, Chinese Academy of Geological Sciences, Beijing 100081, China;
    3. College of Resources, Environment and Tourism, Capital Normal University, Beijing 100048, China
  • Received:2016-12-23 Online:2017-03-26 Published:2017-03-26
  • Supported by:
    Supported by the Geological Survey Project of China Geological Survey (1212011120164,12120114002301) and the National Natural Science Foundation of China (41202162)

PDF (PC)

514

摘要： 对印支地块思茅地区始新世陆相红层进行古地磁研究，获得勐伴剖面特征剩磁方向为Ds=118.2°，Is=22.1°，k=31.6，α95=10.9°；勐腊剖面特征剩磁方向为Ds=47.6°，Is=22.8°，k=20.2，α95=5.9°。其特征剩磁方向与前人研究结果基本一致。利用Hodych等的磁倾角校正方法得到校正磁倾角为28.4°±4.3°，对前人的数据重新进行E/I统计得到的校正磁倾角值为30.7°，置信区间为[25.4°，35.9°]，两种不同方法得到了较一致的结果，思茅地区的古近纪磁倾角显示了一定程度的偏低。E/I磁倾角偏低检验方法在应用时存在一定的局限性，变形微弱地层的古地磁学数据适合进行E/I磁倾角偏低校正，以避免倾伏褶皱或差异性旋转变形作用对E/I磁倾角偏低校正的影响。Hodych等提出的磁倾角校正方法是现今比较可靠的磁倾角校正方法。结合前人印支地块的古地磁研究成果，本次研究结果表明印支地块思茅地区自始新世以来相对于华南板块向南滑移量约500 km。

关键词: 印度支那地块, 古近纪, 地块运动, 古地磁, 磁倾角偏低

Abstract: Paleomagnetic inclination shallowing studies were carried out on the Eocene red beds in Simao area of the Indochina block. High-temperature magnetic components were isolated from the Mengban and Mengla sections, the tilt corrected site-mean directions at Mengban and Mengla are Ds=118.2°, Is=22.1°, k=31.6, α95=10.9°, and Ds=47.6°, Is=22.8°, k=20.2, α95=5.9°, respectively, which are consistent with those previous research results in these areas. The inclination shallowing correction method proposed by Hodych & Buchan and elongation/inclination (E/I) correction are used to quantitatively estimate the inclination bias of Eocene red-beds in the Mengban and Mengla area. The corrected inclinations are 28.4°±4.3° and 30.7°[25.4°, 35.9°] following the method of Hodych & Buchan and E/I correction,respectively. These results indicate that deposition and/or compaction induced inclination shallowing existed in the Paleogene red-beds in the southern part of Simao terrane. The usage of E/I correction is limited in the strata with weak deformation, in which the influence of plunging fold or local rotational deformation will strongly deviate the declinations. Hodych & Buchan's method is more reliable for the inclination correction of red beds. Combining with previous paleomagnetic data from the Indochina block, these results presented in this paper indicate that the Indochina block has been subjected to southeastward displacement by 500 km with respect to the South China block since the Eocene.

Key words: Indochina block, Eocene, block movement, paleomagnetism, inclination shallowing

中图分类号: 

  • P618.81
[1] Molnar P, Tapponnier P. Cenozoic Tectonics of Asia:Effects of a Continental Collision[J]. Science, 1975, 189(4201):419-426.
[2] Rowley D B. Age of Initiation of Collision Between India and Asia:A Review of Stratigraphic Data[J]. Earth and Planetary Science Letters, 1996, 145(1):1-13.
[3] Tapponnier P, Zhiqin X, Roger F, et al. Oblique Stepwise Rise and Growth of the Tibet Plateau[J]. Science, 2001, 294(5547):1671-1677.
[4] Tong Y B, Yang Z Y, Zheng L D, et al. Early Paleocene Paleomagnetic Results from Southern Tibet, and Tectonic Implications[J]. International Geology Review, 2008, 50(6):546-562.
[5] Tapponnier P, Molnar P. Slip-Line Field Theory and Large-Scale Continental Tectonics[J]. Nature, 1976, 264(5584):319-324.
[6] Tapponnier P, Peltzer G, Le Dain A Y, et al. Pro-pagating Extrusion Tectonics in Asia:New Insights from Simple Experiments with Plasticine[J]. Geology, 1982, 10(12):611-616.
[7] Replumaz A, Tapponnier P. Reconstruction of the De-formed Collision Zone Between India and Asia by Backward Motion of Lithospheric Blocks[J]. Journal of Geophysical Research, 2003, 108(B6):2285-2308.
[8] 杨振宇,Besse J,孙知明,等.印度支那地块第三纪构造滑移与青藏高原岩石圈构造演化[J].地质学报,1998,72(2):112-125. Yang Zhenyu, Besse J, Sun Zhiming, et al.Tertiary Squeeze-Out of the Indo-China Block and Lithospheric Evolution of the Qinghai-Tibetan Plateau[J]. Acta Geologica Sinica, 1998, 72(2):112-125.
[9] Gilley L D, Harrison T M, Leloup P H, et al. Direct Dating of Left-Lateral Deformation Along the Red River Shear Zone, China and Vietnam[J]. Journal of Geophysical Research, 2003, 108(B2):2127-2140.
[10] Sato K, Liu Y Y, Zhu Z C, et al. Paleomagnetic Study of Middle Cretaceous Rocks from Yunlong, Western Yunnan, China:Evidence of Southward Displacement of Indochina[J]. Earth and Planetary Science Letters, 1999, 165(1):1-15.
[11] Funahara S, Nishiwaki N, Murata F, et al. Clock-wise Rotation of the Red River Fault Inferred from Paleomagnetic Study of Cretaceous Rocks in the Shan-Thai-Malay Block of Western Yunnan, China[J]. Earth and Planetary Science Letters, 1993, 117(1):29-42.
[12] Huang K N, Opdyke N D. Paleomagnetic Results from Cretaceous and Jurassic Rocks of South and Southwest Yunnan:Evidence for Large Clockwise Rotations in the Indochina and Shan-Thai-Malay Terranes[J]. Earth and Planetary Science Letters, 1993, 117(3):507-524.
[13] Chen H H, Dobson J, Heller F, et al. Paleomagnetic Evidence for Clockwise Rotation of the Simao Region Since the Cretaceous:A Consequence of India-Asia Collision[J]. Earth and Planetary Science Letters, 1995, 134(1):203-217.
[14] Yang Z Y, Yin J Y, Sun Z M, et al. Discrepant Cretaceous Paleomagnetic Poles Between Eastern China and Indochina:A Consequence of the Extrusion of Indochina[J]. Tectonophysics, 2001, 334(2):101-113.
[15] Sato K, Liu Y Y, Wang Y B, et al. Paleomagnetic Study of Cretaceous Rocks from Pu'er, Western Yunnan, China:Evidence of Internal Deformation of the Indochina Block[J]. Earth and Planetary Science Letters, 2007, 258(1):1-15.
[16] 杨振宇,孙知明,马醒华,等.红河断裂两侧早第三纪古地磁研究及其地质意义[J].地质学报,2001,75(1):35-44. Yang Zhenyu, Sun Zhiming,Ma Xinghua,et al. Palaeomagnetic Study of the Early Tertiary on both Sides of the Red River Fault and Its Geological Implications[J]. Acta Geologica Sinica, 2001,75(1):35-44.
[17] Tong Y B, Yang Z Y, Zheng L D, et al. Internal Crustal Deformation in the Northern Part of Shan-Thai Block:New Evidence from Paleomagnetic Results of Cretaceous and Paleogene Redbeds[J]. Tectonophysics, 2013, 608:1138-1158.
[18] 张海峰,仝亚博,王恒,等.印支地块思茅地区早白垩世古地磁结果及其构造意义[J].地质学报,2012,86(6):923-939. Zhang Haifeng,Tong Yabo,Wang Heng,et al. Early Cretaceous Paleomagnetic Results of the Simao Area in the Indochina Block and Its Tectonic Implications[J]. Acta Geologica Sinica, 2012, 86(6):923-939.
[19] Tanaka K, Mu C, Sato K, et al. Tectonic Defor-mation Around the Eastern Himalayan Syntaxis:Constraints from the Cretaceous Palaeomagnetic Data of the Shan-Thai Block[J]. Geophysical Journal International, 2008, 175(2):713-728.
[20] Sato K, Liu Y Y, Zhu Z C, et al. Tertiary Paleo-magnetic Data from Northwestern Yunnan, China:Further Evidence for Large Clockwise Rotation of the Indochina Block and Its Tectonic Implications[J]. Earth and Planetary Science Letters, 2001, 185(1):185-198.
[21] Yang Z Y, Besse J. Paleomagnetic Study of Permian and Mesozoic Sedimentary Rocks from Northern Thailand Supports the Extrusion Model for Indochina[J]. Earth and Planetary Science Letters, 1993, 117(3):525-552.
[22] Yang Z Y, Sun Z M, Ma X H, et al. The Extrusion of Indochina During the India/Eurasia Collision:Early Tertiary Paleomagnetic Constraints[J]. Gondwana Research, 2001, 4(4):843.
[23] Zhang P Z, Shen Z K, Wang M, et al. Continuous Deformation of the Tibetan Plateau from Global Positioning System Data[J]. Geology, 2004, 32(9):809-812.
[24] Shen Z K, Lü J N, Wang M, et al. Contemporary Crustal Deformation Around the Southeast Borderland of the Tibetan Plateau[J]. Journal of Geophysical Research, 2005, 110(B11):409-425.
[25] Wang B, Yang Z Y. Late Cretaceous Paleomagnetic Results from Southeastern China, and Their Geological Implication[J]. Earth and Planetary Science Letters, 2007, 258(1):315-333.
[26] Tauxe L, Kent D V. A Simplified Statistical Model for the Geomagnetic Field and the Detection of Shallow Bias in Paleomagnetic Inclinations:Was the Ancient Magnetic Field Dipolar?[J]. Timescales of the Paleomagnetic Field, 2004, 145:101-115.
[27] Hodych J P, Buchan K L. Early Silurian Palaeola-titude of the Springdale Group Redbeds of Central Newfoundland:A Palaeomagnetic Determination with a Remanence Anisotropy Test for Inclination Error[J]. Geophysical Journal International, 1994, 117(3):640-652.
[28] Wang X F, Metcalfe I, Jian P, et al. The Jinshajiang-Ailaoshan Suture Zone, China:Tectonostratigraphy, Age and Evolution[J]. Journal of Asian Earth Sciences, 2000, 18(6):675-690.
[29] Tapponnier P, Lacassin R, Leloup P H, et al. The Ailao Shan/Red River Metamorphic Belt:Tertiary Left-Lateral Shear Between Indochina and South China[J]. Nature, 1990,343:431-437.
[30] Leloup P H, Lacassin R, Tapponnier P, et al. The Ailao Shan-Red River Shear Zone (Yunnan, China), Tertiary Transform Boundary of Indochina[J]. Tectonophysics, 1995, 251(1):3-84.
[31] Leloup P H, Arnaud N, Lacassin R, et al. New Constraints on the Structure, Thermochronology, and Timing of the Ailao Shan-Red River Shear Zone, SE Asia[J]. Journal of Geophysical Research, 2001, 106(B4):6683-6732.
[32] Lacassin R, Schärer U, Leloup P H, et al. Tertiary Deformation and Metamorphism SE of Tibet:The Folded Tiger-Leap Décollement of NW Yunnan, China[J]. Tectonics, 1996, 15(3):605-622.
[33] 云南省地质矿产局. 云南省区域地质志[M].北京:地质出版社, 1990. Bureau of Geology and Mineral Resources of Yunnan Province. Regional Geology of Yunnan Province[M]. Beijing:Geological Publishing House, 1990.
[34] Wang E C, Burchfiel B C. Late Cenozoic to Holocene Deformation in Southwestern Sichuan and Adjacent Yunnan, China, and Its Role in Formation of the Southeastern Part of the Tibetan Plateau[J]. Geological Society of America Bulletin, 2000, 112(3):413-423.
[35] Finlay C C, Maus S, Beggan C D, et al. International Geomagnetic Reference Field:The Eleventh Generation[J]. Geophysical Journal International, 2010, 183(3):1216-1230.
[36] Kirschvink J L. The Least-Squares Line and Plane and the Analysis of Palaeomagnetic Data[J]. Geophysical Journal International, 1980, 62(3):699-718.
[37] Fisher R. Dispersion on a Sphere[C]//Proceedings of the Royal Society of London A:Mathematical, Physical and Engineering Sciences. London:The Royal Society, 1953, 217:295-305.
[38] Gilder S, Zhao X X, Coe R, et al. Paleomagnetism and Tectonics of the Southern Tarim Basin, Northwestern China[J]. Journal of Geophysical Research, 1996, 101(B10):22015-22031.
[39] Gilder S, Chen Y, Sen S. Oligo-Miocene Magneto-stratigraphy and Rock Magnetism of the Xishuigou Section, Subei (Gansu Province, Western China) and Implications for Shallow Inclinations in Central Asia[J]. Journal of Geophysical Research, 2001, 106(B12):30505-30521.
[40] Gilder S, Chen Y, Cogné J P, et al. Paleomagnetism of Upper Jurassic to Lower Cretaceous Volcanic and Sedimentary Rocks from the Western Tarim Basin and Implications for Inclination Shallowing and Absolute Dating of the M-0(ISEA?) Chron[J]. Earth and Planetary Science Letters, 2003, 206(3):587-600.
[41] Dupont-Nivet G, Guo Z, Butler R F, et al. Discor-dant Paleomagnetic Direction in Miocene Rocks from the Central Tarim Basin:Evidence for Local Deformation and Inclination Shallowing[J]. Earth and Planetary Science Letters, 2002, 199(3):473-482.
[42] Bazhenov M L, Mikolaichuk A V. Paleomagnetism of Paleogene Basalts from the Tien Shan, Kyrgyzstan:Rigid Eurasia and Dipole Geomagnetic Field[J]. Earth and Planetary Science Letters, 2002, 195(1):155-166.
[43] Tan X D, Gilder S, Kodama K P, et al. New Palaeo-magnetic Results from the Lhasa Block:Revised Estimation of Latitude Shortening Across Tibet and Implications for Dating the India-Asia Collision[J]. Earth and Planetary Science Letters, 2010,293:396-404.
[44] Tauxe L. Inclination Flattening and the Geocentric Axial Dipole Hypothesis[J]. Earth and Planetary Science Letters, 2005, 233(3):247-261.
[45] Allen C R, Gillespie A R, Han Y, et al. Red River and Associated Faults, Yunnan Province, China:Quaternary Geology, Slip Rates, and Seismic Hazard[J]. Geological Society of America Bulletin, 1984, 95(6):686-700.
[46] Tan X D, Kodama K P, Fang D J. Laboratory Depo-sitional and Compaction-Caused Inclination Errors Carried by Haematite and Their Implications in Identifying Inclination Error of Natural Remanence in Red Beds[J]. Geophysical Journal International, 2002, 151(2):475-486.
[47] Tucker P. Selective Post-Depositional Realignment in a Synthetic Sediment[J]. Physics of the Earth and Planetary Interiors, 1979, 20(1):11-14.
[48] Tan X D, Kodama K P, Gilder S, et al. Rock Mag-netic Evidence for Inclination Shallowing in the Passaic Formation Red Beds from the Newark Basin and a Systematic Bias of the Late Triassic Apparent Polar Wander Path for North America[J]. Earth and Planetary Science Letters, 2007, 254(3):345-357.
[49] Tauxe L,Kent D V.Properties of a Detrital Rema-nence Carried by Hematite from Study of Modern River Deposits and Laboratory Rede-Position Experiments, Geophys[J].Jour Roy Astr Soc, 1984,77:543-561.
[50] Maurin T, Masson F, Rangin C, et al. First Global Positioning System Results in Northern Myanmar:Constant and Localized Slip Rate Along the Sagaing Fault[J]. Geology, 2010, 38(7):591-594.
[51] Kondo K, Mu C L, Yamamoto T, et al. Oroclinal Origin of the Simao Arc in the Shan-Thai Block Inferred from the Cretaceous Palaeomagnetic Data[J]. Geophysical Journal International, 2012, 190(1):201-216.
[52] Roger F, Calassou S, Lancelot J, et al. Miocene Emplacement and Deformation of the Konga Shan Granite (Xianshui He Fault Zone, West Sichuan, China):Geodynamic Implications[J]. Earth and Planetary Science Letters, 1995, 130(1):201-216.
[53] Wang S F, Erchie W,Fang X M, et al. Late Cenozoic Systematic Left-Lateral Stream Deflections Along the Ganzi-Yushu Fault, Xianshuihe Fault System, Eastern Tibet[J]. International Geology Review, 2008, 50(7):624-635.
[54] Wang S F,Jiang G G,Xu T D, et al. The Jinhe-Qinghe Fault:An Inactive Branch of the Xianshuihe-Xiaojiang Fault Zone, Eastern Tibet[J]. Tectonophysics, 2012, 544:93-102.
[55] Wang Y J, Fan W M, Zhang Y H, et al. Kinematics and 40Ar/39Ar Geochronology of the Gaoligong and Chongshan Shear Systems, Western Yunnan, China:Implications for Early Oligocene Tectonic Extrusion of SE Asia[J]. Tectonophysics, 2006, 418(3):235-254.
[56] Cogné J P, Besse J, Chen Y, et al. A New Late Cretaceous to Present APWP for Asia and Its Implications for Paleomagnetic Shallow Inclinations in Central Asia and Cenozoic Eurasian Plate Deformation[J]. Geophysical Journal International, 2013, 192(3):1000-1024.
[57] Wang H, Yang Z Y, Tong Y B, et al. Palaeoma-gnetic Results from Palaeogene Red Beds of the Chuan-Dian Fragment, Southeastern Margin of the Tibetan Plateau:Implications for the Displacement on the Xianshuihe-Xiaojiang Fault Systems[J]. International Geology Review, 2016, 58(11):1363-1381.
[58] Gilder S A, Coe R S, Wu H R, et al. Cretaceous and Tertiary Paleomagnetic Results from Southeast China and Their Tectonic Implications[J]. Earth and Planetary Science Letters, 1993, 117(3):637-652.
[59] Zhao X X, Robert C, Zhou Y X, et al. Tertiary Paleomagnetism of North and South China and a Reappraisal of Late Mesozoic Paleomagnetic Data from Eurasia:Implications for the Cenozoic Tectonic History of Asia[J]. Tectonophysics, 1994, 235(1):181-203.
[60] Bowen G J, Clyde W C, Koch P L, et al. Mammalian Dispersal at the Paleocene/Eocene Boundary[J]. Science, 2002, 295(5562):2062-2065.
[61] Sun Z M, Yang Z Y, Yang T S, et al. New Late Cretaceous and Paleogene Paleomagnetic Results from South China and Their Geodynamic Implications[J]. Journal of Geophysical Research, 2006, 111:1-19.
[62] Yang Z Y, Besse J. New Mesozoic Apparent Polar Wander Path for South China:Tectonic Consequences[J]. Journal of Geophysical Research, 2001, 106(B5):8493-8520.
[63] Gilder S A, Leloup P H, Courtillot V, et al. Tec-tonic Evolution of the Tancheng-Lujiang (Tan-Lu) Fault via Middle Triassic to Early Cenozoic Paleomagnetic Data[J]. Journal of Geophysical Research, 1999,104(B7):15365-15390.
[64] Clyde W C, Tong Y S, Snell K E, et al. An Integ-rated Stratigraphic Record from the Paleocene of the Chijiang Basin, Jiangxi Province (China):Implications for Mammalian Turnover and Asian Block Rotations[J]. Earth and Planetary Science Letters, 2008, 269(3):554-564.
[65] Harrison T M, Chen W J, Leloup P H, et al. An Early Miocene Transition in Deformation Regime Within the Red River Fault Zone, Yunnan, and Its Significance for Indo-Asian Tectonics[J]. Journal of Geophysical Research, 1992, 97(B5):7159-7182.
[1] 韩朋, 翟云峰, 栗粲圪, 张运, 杨会会, 靳春胜. 末次间冰期以来洛川黄土天然剩磁记录的可靠性[J]. 吉林大学学报(地球科学版), 2017, 47(3): 793-806.
[2] 裴军令, 周在征, 李海兵, 孙知明. 中中新世以来阿尔金断裂走滑未造成柴达木盆地整体旋转[J]. 吉林大学学报(地球科学版), 2016, 46(1): 163-174.
[3] 孙平昌, 刘招君, 李宝毅, 柳蓉, 孟庆涛, 周人杰, 姚树青, 徐银波. 桦甸盆地桦甸组油页岩段地球化学特征及地质意义[J]. J4, 2012, 42(4): 948-960.
[4] 廖计华, 王华, 肖军, 李俊良, 严德天, 李国良, 夏存银, 李彦丽, 任桂媛. 琼东南盆地古近纪幕式裂陷及构造、层序和沉积的综合响应过程[J]. J4, 2012, 42(4): 970-983.
[5] 宋春彦, 王剑, 付修根, 冯兴雷, 陈明, 何利. 青藏高原羌塘盆地晚三叠世古地磁数据及其构造意义[J]. J4, 2012, 42(2): 526-535.
[6] 李朋武, 高锐, 管烨, 李秋生. 古亚洲洋和古特提斯洋的闭合时代--论二叠纪末生物灭绝事件的构造起因[J]. J4, 2009, 39(3): 521-527.
[7] 李朋武，高锐，管烨，李秋生. 内蒙古中部索伦-林西缝合带封闭时代的古地磁分析[J]. J4, 2006, 36(05): 744-758.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
版权所有 © 《吉林大学学报(地球科学版)》编辑部
地址：长春市西民主大街938号(130026)　电话：+86-431-88502374；13756165364　E-mail: xuebao1956@jlu.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发