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西南印度洋构造地貌与构造过程

, PP. 15-29

Keywords: 西南印度洋,转换断层,分段性,构造地貌,断层组合

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Abstract:

本文基于海底水深数据,制定了西南印度洋超慢速扩张脊新的海底构造地貌划分原则,将西南印度洋划分为7级构造地貌单元;并以该洋中脊中段的DiscoveryII和Gallieni转换断层之间及其邻区的海底构造地貌特征为依据,将其与该区断裂演化、分段性、分段拓展机制、中央裂谷形成过程、脊?柱相互作用和洋中脊跃迁进行综合分析。结果表明,该区洋中脊可以划分为4个三级构造地貌单元(即洋中脊的一级分段),从西向东被AndrewBain和PrinceEdwards、DiscoveryII以及Gallieni转换断层依次分割,分别反映为强热点?洋中脊相互作用的扩张脊、弱热点?洋中脊相互作用的扩张脊和正常超慢速扩张脊的地貌类型。每个三级分段可进一步划分为3~4个四级分段,本文仅侧重DiscoveryII和Gallieni转换断层间洋中脊四到七级的4个级别分段划分(即洋中脊的四级构造地貌单元再划分为3级)。其中,第七级构造地貌单元分别为侧列式裂谷(剪切带)、雁列式裂谷、横断层带等构造分割。该段洋中脊先后受Marion、Crozet、Madagascar等热点或海台的影响,经历了3次洋中脊跃迁,时间大致分别为80Ma,60Ma和40Ma,该过程与冈瓦纳大陆裂解以来的大洋演化有关。最后,本文详细分析了20Ma以来的西南印度洋洋中脊轴部的周期性拉分式断陷、多米诺式箕状断陷、地堑式断陷和海洋核杂岩等构造过程。

References

[1]  马宗晋, 李存梯, 高祥林. 1998. 全球洋底增生构造及其演化. 中国科学(D辑), 28(2): 157?165.
[2]  阮爱国, 李家彪, 陈永顺, 丘学林, 吴振利, 赵明辉, 牛雄伟, 王春龙, 王显光. 2010. 国产I-4C型OBS在西南印度洋中脊的试验. 地球物理学报, 53(4): 1015?1018.
[3]  张涛, 林间, 高金耀. 2011. 90 Ma以来热点与西南印度洋中脊的交互作用: 海台与板内海山的形成. 中国科学(D辑), 41(6): 760?772.
[4]  Acharyya S K. 2000. Break up of Australia-India-Madag?ascar Block, opening of the Indian Ocean and contine?ntal accretion in Southeast Asia with special reference to the characteristics of the Peri-Indian collision zones. Gondwana Research, 3(4): 425?443.
[5]  Antretter M, Steinberger B, Heider F and Soel H. 2002. Paleolatitudes of the Kerguelen hotspot: New paleom-agnetic results and dynamic modeling. Earth and Plan?e?tary Science Letters, 203: 635?650.
[6]  Bach W, Banerjee N R, Dick H J B and Baker E T. 2002. Discovery of ancient and active hydrothermal systems along the ultra-slow spreading Southwest Indian Ridge 10°?16°E. Geochemistry, Geophysics, Geosystems, 3(7), doi: 10.1029/2001GC000279.
[7]  Baines A G, Cheadle M J, Dick H J B, Scheirer A H, John B E, Kusznir N J and Matsumoto T. 2007. Evolution of the Southwest Indian Ridge from 55°45''E to 62°E: Cha?n?ges in plate boundary geometry since 26 Ma. Geo?c?hemistry, Geophysics, Geosystems, 8(6), Q06022, doi: 10.1029/2006GC001559.
[8]  Font L B J, Murton S and Tindle A G. 2007. Variations in melt productivity and melting conditions along SWIR (70°E-49°E): Evidence from olivine-hosted and plagio?c?lase hosted melt inclusions. Journal of Petrology, 48(8): 1471?1494.
[9]  Inokuchi H and Heider F. 1992. Paleolatitude of the Sout?hern Kerguelen Plateau inferred from the paleomag?netic study of Late Cretaceous basalts // Wise J S W, Julson A P, Schlich R and Thomas E. Proceedings of the Ocean Drilling Program, Scientific Results, 120: 89?98.
[10]  Kamesh R K A, Samudrala K, Drolia R K, Amarnath D, Ramachandran R and Mudholkar A. 2012. Segmen?tation and morphology of the Central Indian Ridge between 3°S and 11°S, Indian Ocean. Tectonophysics, 554: 114?126.
[11]  Klein E M and Langmuir C H. 1987. Global correlations of ocean ridge basalt chemistry with axial depth and cru?stal chemistry. Journal of Geophysical Research, 92(B8): 8089?8115.
[12]  Klootwijk C T. 1971. Paleomagnetism of the Upper Gond?wana Rajmahal Traps, northeast India. Tectonophysics, 12: 449?467.
[13]  Klootwijk C T, Jeff S G, Peirce J W and Smith G M. 1991. Constraints on the India-Asia convergence: Paleomag?netic results from Ninetyeast Ridge // Weissel J K, Peirce J W, Taylor E and Alt J. Proceedings of the Ocean Drilling Program, Scientific Results, : 121.
[14]  Müller R D, Royer J Y and Lawver L A. 1993. Revised plate motions relative to the hotspots from combined Atlantic and Indian Ocean hotspot tracks. Geology, 21: 275?278.
[15]  Niu Y and O''Hara M J. 2008. Global correlations of ocean ridge basalt chemistry with axial depth: A new perspective. Journal of Petrology, 49(4): 633?664.
[16]  O''Neill C, Müller D and Steinberger B. 2003. Geodynamic implications of moving Indian Ocean hotspots. Earth and Planetary Science Letters, 215: 151?168.
[17]  Patriat P, Sauter D, Munschy M and Parson L M. 1997. A survey of the Southwest Indian Ridge axis between Atlantis II Fracture Zone and the Indian Triple Junction: Regional setting and large scale segmentation. Marine Geophysical Research, 19: 457?480, doi: 10.1023/A: 1004312623534.
[18]  Reid I and Jackson H R. 1981. Oceanic spreading rate and crustal thickness. Marine Geophysical Reseach, 5: 165?172.
[19]  Royer J Y, Gordon R G and Horner-Johnson B C. 2006. Mo?t?ion of Nubia relative to Antarctica since II Ma: Impl?ications for Nubia-Somalia, Pacific-North America, and India-Eurasia motion. Geology, 34(6): 501?504.
[20]  Royer J Y, Patriat P, Bergh H W and Scotese C R. 1988. Evolution of the Southwest Indian Ridge from the late cretaceous (anomaly 34) to the middle Eocene (ano?maly 20). Tectonophysics, 155: 235?260.
[21]  Sauter D and Cannat M. 2010. The ultraslow spreading Southwest Indian Ridge // Rona P A, Devey C W, Dym?ent J and Murton B J. Diversity of hydrothermal syst?e?ms on slow spreading ocean ridges. The American Geo?p?hysical Union Geophysical Monograph Series, 188: 153?173.
[22]  Sauter D, Cannat M, Meyzen C, Bezos A, Patriat P, Humler E and Debayle E. 2009. Propagation of a melting ano?maly along the ultraslow Southwest Indian Ridge betw?een 46°E and 52°20''E: Interaction with the Crozet hotspot? Geophysical Journal International, 179: 687?699.
[23]  Sauter D, Carton H, Mendel V, Munschy M, Rommev?aux- Jestin C, Schott J J and Whitechurch H. 2004. Ridge segmentation and the magnetic structure of the South?west Indian Ridge (at 50°30''E, 55°30''E and 66°20''E): Implications for magmatic processes at ultraslow- spreading centers. Geochemistry, Geophysics, Geosys?tems, 5, doi: 10.1029/2003GC000581.
[24]  Sauter D, Parson L, Mendel V, Rommevaux-Jestin C, Gomez O, Briais A, Me?vel C and Tamaki K. 2002. TOBI sidescan sonar imagery of the very slow-spreading South?west Indian Ridge: Evidence for along-axis mag?ma distri?b?ution. Earth and Planetary Science Letters, 199: 81?95.
[25]  Sauter D, Patriat P and Rommevaux-Jestin C. 2001. The Southwest Indian Ridge between 49°15''E and 57°E: Focused accretion and magma redistribution. Earth and Planetary Science Letters, 192: 303?317.
[26]  Sclater J G, Fisher R L, Patriat P, Tapscott C R and Parsons B. 1981. Eocene to recent development of the south- west Indian Ridge, a consequence of the evolution of the Indian Ocean triple junction. Geophysical Journal Royal Astronomical Society, 64: 587?604.
[27]  Sempere J C, Lin J, Brown H S, Schouten H and Purdy G M. 1993. Segmentation and morphotectonic variations along a slow-spreading center: The Mid-Atlantic Ridge 24°? 30°40′N. Marine Geophysical Reseach, 15: 153?200.
[28]  Barling J. 1990. Heard and McDonald Islands // Le-Mas?urier W E and Thomson J W. Volcanoes of the Antarctic Plate and Southern Ocean. Antarctic Research Series 48. AGU, Washington DC: 435?441.
[29]  Ben-Avraham Z, Hartnady C J H and Roex A P L. 1995. Neotectonic activity on continental fragments in the Sout-hwest Indian Ocean: Agulhas Plateau and Mozam?bique Ridge. Journal of Geophysical Research, 100 (B4): 6199?6211.
[30]  Smith W H and Sandwell D T. 1997. Global sea floor topography from satellite altimetry and ship depth soundings. Science, 277: 1956?1962.
[31]  Stamps D S, Calais E, Saria E, Hartnady C, Nocquet J M, Ebinger C J and Fernandes R M. 2008. A kinematic model for the East African Rift. Geophysical Research Letters, 35. L05304, doi: 10.1 029/2007GL032781.
[32]  Standish J J and Sims K W W. 2010. Young off-axis volca?nism along the ultraslow-spreading Southwest Indian Ridge. Nature Geoscience, 3: 286?292.
[33]  Storey M, Mahoney J J, Saunders A D, Duncan R A, Kelley S P and Coffin M F. 1995. Timing of hot spot-related volcanism and the breakup of Madagascar and India. Science, 267: 852?855.
[34]  Tao C H, Lin J, Guo S Q, Chen Y J, Wu G H, Han X Q, German C R, Yoerger D R, Zhou N, Li H M, Su X and Zhu J. 2012. First active hydrothermal vents on an ultraslow-spreading center: Southwest Indi?an Ridge. Geology, 40: 47?50.
[35]  Torsvik T H, Tucker R D, Ashwal L D, Eide E A, Rakoto?solofo N A and de Wit M J. 1998. Late Cretaceous magmatism in Madagascar: Palaeomagnetic evidence for a stationary Marion hotspot. Earth and Planetary Science Letters, 164: 221?232.
[36]  Tucholke B E, Behn M D, Buck W R and Lin J. 2008. Role of melt supply in oceanic detachment faulting and formation of megamullions. Geology, 36: 455?458.
[37]  Zhao M H, Qiu X L, Li J B, Sauter D, Ruan A G, Chen J, Cannat M, Singh S, Zhang J Z, Wu Z L and Niu X W. 2013. Three-dimensional seismic structure of the Dra?gon Flag oceanic core complex at the ultraslow sprea?ding Southwest Indian Ridge (49?39′E). Geochemistry, Geophysics, Geosystems, 14: 4544-4563, doi: 10.1002/ ggge.20264.
[38]  Zhou H Y and Dick H J P. 2013. Thin crust as evidence for depleted mantle supporting the Marion Rise. Nature, 494: 195?200.
[39]  Bergh H W and Barrett D M. 1980. Aghulas Basin magnetic bight. Nature, 287: 591-595.
[40]  Bernard A, Munschy M, Rotstein Y and Sauter D. 2005. Re?f-ined spreading history at the Southwest Indian Ridge for the last 96 Ma, with the aid of satellite gravity data. Geophysical Journal International, 162(3): 765?778.
[41]  Bown J W and White R S. 1994. Variation with spreading rate of oceanic crustal thickness and geochemistry. Earth and Planetary Science Letters, 121: 435?449.
[42]  Buck W R, Lavier L L and Poliakov A N B. 2005. Modes of faulting at mid-ocean ridges. Nature, 434: 719?723.
[43]  Cannat M, Rommevaux-Jestin C, Sauter D, Deplus C and Mendel V. 1999. Formation of the axial relief at the very slow spreading Southwest Indian Ridge (49° to 69°E). Journal of Geophysical Research, 104: 21825? 21843.
[44]  Cannat M, Sauter D, Bezos A, Meyzen C, Humler E and Le Rigoleur M. 2008. Spreading rate, spreading obliquity, and melt supply at the ultraslow spreading Southwest Indian Ridge. Geochemistry, Geophysics, Geosystems, 9(4), DOI: 10.1029/2007GC00y1676.
[45]  Chu D and Gordon R G. 1999. Evidence for motion between Nubia and Somalia along the Southwest Indian Ridge. Nature, 398: 64?67.
[46]  Coffin M F, Pringle M S, Duncan R A, Gladczenko T P, Storey M, Müller R D and Gahagan L A. 2002. Kerg?uelen hotspot magma output since 130 Ma. Journal of Petrology, 43: 1121?1139.
[47]  Courtillot V E, Besse J, Vandamme D, Montigny R, Jaeger J and Cappetta H. 1986. Deccan flood basalts at the Cret?a?c-eous/Tertiary boundary? Earth and Planetary Science Letters, 80: 361?374.
[48]  Debayle E, Kennett B and Priestley K. 2005. Global azim?uthal seismic anisotropy and the unique plate motion deformation of Australia. Nature, 433: 509-512.
[49]  Debayle E and Lévêque J J. 1997. Upper mantle heteroge?neities in the Indian Ocean from waveform inversions. Geophysical Research Letters, 24(3): 245?248.
[50]  Dick H J B, Lin J and Schouten H. 2003. An ultraslow- spreading class of ocean ridge. Nature, 426: 405?412.
[51]  Duncan R A. 1991. Age distribution of volcanism along aseismic ridges in the eastern Indian Ocean // Weissel J, Peirce J, Taylor E, Alt J, et al. Proceedings of the Ocean Drilling Program, Scientific Results, 121: 507?517.
[52]  Duncan R A. 2002. A time frame for construction of the Kerguelen Plateau and Broken Ridge. Journal of Petrology, 43: 1109?1119.
[53]  Duncan R A and Hargraves R B. 1990. 40Ar/39Ar geochro?nology of basement rocks from the Mascarene Plateau, the Chagos Bank, and the Maldives Ridge // Duncan R A, Backman J, Dunbar R B and Peterson L C. Proce?edings of the Ocean Drilling Program, Scientific Res?ults, 115: 43?52.
[54]  Dyment J. 1993. Evolution of the Indian Ocean triple junc?tion and 49 Ma (Anomalies 28 to 21). Journal of Geophysical Research, 98(B8), 13, 863?13, 877.
[55]  Frey F A, Coffin M F, Wallace P J, Weis D, Zhao X, Wise S W, Wahnert V, Teagle D A H, Saccocia P J, Reusch D N, Pringle M S, Nicolaysen KE, Neal C R, Muller R D, Moore C L, Mahoney J J, Keszthelyi L, Inokuchi H, Duncan R A, Delius H, Damuth J E, Damasceno D, Coxall H K, Borre M K and Boehm F. 2000. Origin and evolution of a submarine large igneous province: The Kerguelen Plateau and Broken Ridge, southern Indian Ocean. Earth and Planetary Science Letters, 176: 73?89.
[56]  Georgen J E, Lin J and Dick H J B. 2001. Evidence from gravity anomalies for interactions of the Marion and Bouvet hotspots with the Southwest Indian Ridge: Eff?e?cts of transform offsets. Earth and Planetary Science Letters, 187: 283?300.
[57]  Hofmann C, Feraud G and Courtillot V. 2000. 40Ar/39Ar dating of minerals separates and whole rocks from the Western Ghats lava pile: Further constraints on the dur?a?tion and age of the Deccan Traps. Earth and Planetary Science Letters, 180: 13?27.
[58]  Houtz R E, Hayes D E and Markl R G. 1977. Kerguelen Plateau bathymetry, sediment distribution and crustal structure. Marine Geology, 25: 95-130.
[59]  Liang Y Y, Li J B, Li S J, Ruan A G, Ni J Y, Yu Z T and Zhu L. 2013. The morphotectonics and its evolutionary dynamics of the central Southwest Indian Ridge (49° to 51°E). Acta Oceanologica Sinica, 32(12): 87?95.
[60]  Lin J, Purdy G M, Schouten H, Sempere J C and Zervas C. 1990. Evidence from gravity data for focused magmatic accretion along the Mid-Atlantic Ridge. Nature, 344: 627-632, doi: 10.1038/344627a0.
[61]  Livermore R A and Hunter R J. 1996. Mesozoic seafloor spreading in the southern Weddell Sea // Storey B, King E C and Livermore R A. Weddell Sea Tectonics and Gondwana Break-up. Geological Society Special Publication, London, 108(1): 227?241.
[62]  Mahoney J J, Jones W B, Frey F A, Salters V J M, Pyle D G and Davies H L. 1995. Geochemical characteristics of lavas from Broken Ridge, the Naturaliste Plateau and southernmost Kerguelen plateau: Cretaceous plateau volcanism in the southeast Indian Ocean. Chemical Geology, 120: 315?345.
[63]  Mahoney J, Nicollet C and Dupuy C. 1991. Madagascar basalts tracking oceanic and continental sources. Earth and Planetary Science Letters, 104: 350?363.
[64]  Meyzen C M, Toplis M J, Humler E, Ludden J N and Mevel C. 2003. A discontinuity in mantle composition beneath the southwest Indian Ridge. Nature, 421: 731?733.
[65]  Morgan W J. 1981. Hotspot tracks and the opening of the Atlantic and Indian Oceans // Emiliani C. The oceanic lithosphere, the sea 7. New York: Wiley: 443?487.
[66]  Tucholke B E and Lin J. 1994. A geological model for the structure of ridge segments in slow spreading ocean crust. Journal of Geophysical Research, 99: 11957? 11958.
[67]  Vandamme D and Courtillot V. 1990. Paleomagnetism of Leg 115 basement rocks and latitudinal evolution of the Reunion hotspot // Duncan R A, Backman J, Dunbar R B and Peterson L C. Proceedings of the Ocean Drilling Program, Scientific Results, 115: 111?118.
[68]  Wang W, Chu F Y, Zhu J H, Dong Y H, Yu X, Chen L and Li Z G. 2013. Mantle melting beneath the Southwest Indian Ridge: Signals from clinopyroxene in abyssal peridotites. Acta Oceanologica Sinica, 32(12): 50?59.
[69]  White R S, Minshull T A, Bickle M J and Ronbinson C J. 2001. Melt generation at very slow-spreading oceanic ridges: Constraints from geochemical and geophysical data. Journal of Petrology, 42(6): 1171?1196.
[70]  Whitechurch H, Montigny R, Sevigny J, Storey M and Salters V. 1992. K-Ar and 40Ar-39Ar ages of central Kerguelen Plateau basalts // Wise SW, Schlich R, et al. Proceedings of the Ocean Drilling Program, Scientific Results, 120: 71?77.
[71]  Zhang T, Lin J and Gao J Y. 2011. Interactions between hotspots and the Southwest Indian Ridge during the last 90 Ma: Implications on the formation of oceanic plat?eaus and intra-plate seamounts. Science in China-Earth Science, doi: 10.1007/s11430-011-4219-9.

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