LI San-zhong, LÜ Hai-qing, HOU Fang-hui, GUO Xiao-yu, JIN Chong, LIU Bao-hua. OCEANIC CORE COMPLEX[J]. Marine Geology & Quaternary Geology, 2006, 26(1): 47-52.
Citation: LI San-zhong, LÜ Hai-qing, HOU Fang-hui, GUO Xiao-yu, JIN Chong, LIU Bao-hua. OCEANIC CORE COMPLEX[J]. Marine Geology & Quaternary Geology, 2006, 26(1): 47-52.

OCEANIC CORE COMPLEX

More Information
  • Received Date: June 07, 2005
  • Revised Date: October 09, 2005
  • Oceanic core complex, a new structural type, was proposed to explain many listric detachment faults and ridge-perpendicular lineations such as megamullion in the Atlantic by comparison with the metamorphic core complex in the continent. The oceanic core complex consists of three parts based on deep seismic reflection profile. The first part is dominated by brittle deformation in layer 1 and layer 2 of the oceanic crust. The second part is brittle-ductile transition layer dominating the detachment fault. The detachment fault zone is composed of white carbonite, strongly serpentinized peridotite or basalt, ultramafic mylonite and mylonitic gabbro and others, rather than felsic mylonite and chlorinized breccia. The detachment surface is covered with thin, unmetamorphic and oceanic sediments, or directly crops out on oceanic crust. Under the detachment fault is retrograde metamorphic hot oceanic mantle. The third part is the core of oceanic core complex, which is dominated by ductile deformation intruded structurally by diapiric ultramafic plutons, especially gabbro intrusions. The oceanic core complex of the oceanic crust is obviously different from the metamorphic core complex of the continent. The oceanic core complex can result in a displacement of several kilometers along the detachment fault, producing local offsets of seafloor magnetic zones and the complexity of structural pattern in the oceanic crust.
  • [1]
    Tucholke B E, Lin J, Kleinrock M C.Megamullions and mullion structure defining oceanic metamorphic core complexes on the Mid-Atlantic Ridge[J]. Journal of Geophysical Research, 1998, 103:9857-9866.
    [2]
    Ranero C R, Reston T J.Detachment faulting at ocean core complexes[J]. Geology, 1999, 27(11):983-986.
    [4]
    李学伦.海洋地质学[M]. 青岛:青岛海洋大学,1997.[LI Xue-lun.Marine Geology[M]. Qingdao:Press of Ocean University of Qingdao, 1997.]
    [5]
    MacLeod C J, Escartin J, Banerji D, et al.Direct geological evidence for oceanic detachment faulting:The Mid-Atlantic Ridge, 15°45'N[J]. Geology, 2002, 30(10):879-882.
    [6]
    Nooner S L, Sasagawa G S, Blackman D K, et al.Structure of oceanic core complexes:Constraints from seafloor gravity measurements made at the Atlantis Massif[J]. Geophysical Research Letters, 2003, 30(8):1446.
    [7]
    Blackman D K, Karson J A, Kelley D S, et al.Geology of the Atlantis Massif (Mid-Atlantic Ridge, 30 degrees N):Implications for the evolution of an ultramafic oceanic core complex[J]. Marine Geophysical Researches, 2002, 23(5-6):443-469.
    [8]
    Reston T J,Weinrebe I, Grevemeyer E R F, et al. Participants of Meteor 47/2. A rifted inside corner massif on the Mid-Atlantic Ridge at 5°S[J]. Earth and Planetary Science Letters, 2002, 200:255-269.
    [9]
    Blackman D K, Cann J R, Janssen B, et al.Origin of extensional core complexes:evidence from the Mid-Atlantic Ridge at Atlantis fracture zone[J]. Journal of Geophysical Research B:Solid Earth, 2001,106(8):16145-16161.
    [10]
    Baines A G, Cheadle M J, Dick H J B, et al.Mechanism for generating the anomalous uplift of oceanic core complexes:Atlantis Bank, southwest Indian Ridge[J]. Geology, 2003, 31(12):1105-1108.
    [11]
    Searle R C, Cannat M, Fujioka K, et al.FUJI Dome:A large detachment fault near 64 degrees E on the very slow-spreading southwest Indian Ridge[J]. Geochemistry Geophysics Geosystems, 2003, 4:9105.
    [12]
    Gao D L, Hurst S D, Karson J A, et al.Computer-aided interpretation of side-looking sonar images from the eastern intersection of the Mid-Atlantic Ridge with the Kane Transform[J]. Journal of Geophysical Research-Solid Earth, 1998, 103(B9):20997-21014.
    [13]
    Kumagai H, Dick H J B, Kaneoka I.Noble gas signatures of abyssal gabbros and peridotites at an Indian Ocean core complex[J]. Geochemistry Geophysics Geosystems, 2003, 4:9107.
  • Related Articles

    [1]CUI Yuhua, LIU Mengjia, HUANG Xiangtong, YANG Shouye, YUE Wei, ZHAO Xilin, JIN Guodong. Automatic identification of heavy mineral compositions in Zhejiang-Fujian rivers and implications for provenance analysis[J]. Marine Geology & Quaternary Geology, 2025, 45(1): 79-95. DOI: 10.16562/j.cnki.0256-1492.2024091801
    [2]LIU Kun, SONG Peng, HU Wenyan, LI Hu, MAO Xuelian. Developmental characteristics of source rock and gas source analysis in Qiongdongnan Basin, Northern South China Sea[J]. Marine Geology & Quaternary Geology, 2022, 42(6): 173-184. DOI: 10.16562/j.cnki.0256-1492.2022060601
    [3]ZHANG Guanglu, YANG Jun, LONG Haiyan, ZHAO Yanyan, ZOU Li, WEI Haotian, LIU Sheng, YANG Dandan, SUN Guojing. In situ geochemical analysis of Mg/Ca ratios of planktonic foraminifera shells in the northeastern continental slope of the South China Sea[J]. Marine Geology & Quaternary Geology, 2022, 42(6): 43-58. DOI: 10.16562/j.cnki.0256-1492.2021122101
    [4]HU Yun, HE Mengying, XU Huan, Tin Aung Myint, ZHANG Bihui, BIAN Zixuan, ZHENG Hongbo. Application of two heavy mineral analysis methods in the provenance study of Irrawaddy River sediments on the southeastern margin of Tibetan Plateau[J]. Marine Geology & Quaternary Geology, 2022, 42(4): 181-193. DOI: 10.16562/j.cnki.0256-1492.2021112901
    [5]LIU Rongbo, YUAN Xiaodong, LIN Zheyuan, QIU Jiandong, HU Rijun, GAO Junfeng, LIU Longlong, ZHANG Shengjiang. Geochemical characteristics and their geological implication in sediments from Laizhou Bay since late Quaternary[J]. Marine Geology & Quaternary Geology, 2022, 42(3): 100-110. DOI: 10.16562/j.cnki.0256-1492.2022012301
    [6]WANG Shengjie, ZHOU Lijun, SUN Ping. Forty years development of marine geology in China: Evidence from scientometrics[J]. Marine Geology & Quaternary Geology, 2021, 41(6): 1-14. DOI: 10.16562/j.cnki.0256-1492.2021110601
    [7]WANG Shengjie, ZHOU Yongqing, ZHANG Zhaodai, SUN Dianqi, LI Yanqiang. CASE STUDY AND COMPARATIVE ANALYSIS ON PATTERNS IN GROWTH OF LITERATURE ON MARINE GEOLOGY AND RELATIVE GEOLOGICAL DATA IN CHINA[J]. Marine Geology & Quaternary Geology, 2015, 35(4): 189-195. DOI: 10.16562/j.cnki.0256-1492.2015.04.020
    [8]WANG Shengjie, ZHOU Yongqing, ZHANG Zhaodai, LIU Jingpeng. SCIENTIFIC QUANTITATIVE ANALYSIS OF LITERATURES ON MARINE GEOLOGY IN THE WORLD[J]. Marine Geology & Quaternary Geology, 2013, 33(1): 72-72. DOI: 10.3724/SP.J.1140.2013.01072
    [9]YAN Guijing, LI Huijun, HE Yuhua, WU Zhiqiang. PETROLEUM GEOLOGIC CHARACTERISTICS ANALYSIS AND FUTURE EXPLORATION TARGETS FOR MARINE STRATA IN THE SOUTH YELLOW SEA BASIN[J]. Marine Geology & Quaternary Geology, 2012, 32(5): 107-113. DOI: 10.3724/SP.J.1140.2012.05107
    [10]CHEN Hong, LIU Jian, WANG Hong-bin. GEOCHEMICAL CHARACTERISTICS AND GEOLOGICAL SIGNIFICANCE OF MAJOR ELEMENTS IN SURFACE SEDIMENTS IN QIONGDONGNAN AREA[J]. Marine Geology & Quaternary Geology, 2007, 27(6): 39-45.

Catalog

    Article views (1988) PDF downloads (24) Cited by()

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return