全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
地质论评  2006 

峨眉山地幔柱上升的沉积响应及其地质意义

Keywords: 峨眉山玄武岩沉积响应地壳抬升和穹状隆起地幔柱

Full-Text   Cite this paper   Add to My Lib

Abstract:

研究表明西南地区峨眉山玄武岩下伏茅口组的部分缺失是峨眉山地幔柱的快速上升及其所形成的地壳穹状隆起造成的。对该地区中、晚二叠世沉积记录的研究也支持上述结论。通过野外实地地质考察和室内综合研究发现,西南地区峨眉山玄武岩之下零星发育一套碎屑岩系,其主要分布在穹状隆起的边缘。在隆起西缘盐源平川一带,为一岩性以砾岩、砂岩为主的低位水下扇;在隆起的东北缘普格、巧家、武定一带,峨眉山玄武岩之下发育一层砾石,主要为茅口组灰岩的灰岩质砾岩;昆明西山地区的灰岩质砾岩中灰岩砾石的磨圆较好,可能代表古河谷沉积。在茅口组顶部古剥蚀面上还零星可见一层厚几米至十几米残积相碎屑岩或底砾岩。上述碎屑岩系的厘定及对其空间分布和沉积环境的研究表明,上扬子西缘峨眉山玄武岩喷发前地壳发生快速穹状抬升,碎屑岩是峨眉山地幔柱上升造成的沉积响应;地幔柱的上升还造成上扬子中、晚二叠世区域岩相古地理的突变和隆起区古喀斯特的形成。这些为峨眉山大火成岩省地幔柱形成机制提供了进一步佐证,同时深化了对晚古生代上扬子西缘构造的认识。

References

[1]  Xu Yigang,Chung Sunlin.2001.The Emeishan large igneous province:evidence for mantle plume activity and melting conditions.Geochimica,30:1~9(in Chinese with English abstract).
[2]  陈智梁,陈世瑜.1987.扬子地块西缘地质构造演化.重庆:重庆出版社.
[3]  从柏林.1988.攀西古裂谷的形成和演化.北京:科学出版社.
[4]  冯增昭,金振奎,等.1994.滇黔桂地区二叠纪岩相古地理.北京:地质出版社.
[5]  贵州省地质矿产局.1987.贵州省区域地质志.北京:地质出版社.
[6]  何斌,徐义刚,等.2003.峨眉山大火成岩省的形成机制及空间展布:来自沉积地层学的新证据.地质学报,77(2):194~201.
[7]  四川省地质矿产局.1991.四川省区域地质志.北京:地质出版社.
[8]  宋谢炎,候增谦,等.2001.峨眉山大火成岩省的岩石化学特征及时限.地质学报,75(4):498~506.
[9]  王立亭,陆彦邦,赵时久,罗晋辉.1994.中国南方二叠纪岩相古地理与成矿作用.北京:地质出版社.
[10]  熊舜华,李建林.1994.峨眉山区晚二叠世大陆裂谷边缘玄武岩的特征.成都地质学院学报,1:43~57.
[11]  徐义刚,钟孙霖.2001.峨眉山大火成岩省:地幔柱活动的证据及其熔融条件.地球化学,30:1~9.
[12]  云南省地质矿产局.1990.云南省区域地质志.北京:地质出版社.
[13]  张云湘,骆耀南,杨崇喜.1988.攀西裂谷.北京:地质出版社.
[14]  张招崇,王福生,范蔚茗,邓海林,徐义刚,许继峰,王岳军.2001.峨眉山玄武岩研究中的一些问题的讨论.岩石矿物学杂志,20(3):239~246.
[15]  《中国地层典》编委会.2000.中国地层典二叠系.北京:地质出版社.
[16]  Brodie J,White N.1994.Sedimentary basin inversion caused by igneous underplating:northwest European continental shelf.Geology,22:147~150.
[17]  Campbell I H,Griffiths R W.1990.Implications of mantle plume structure for the evolution of flood Basalts.Earth and Planetary Science Letters,99:79~93.
[18]  Cox K G.1989.The role of mantle plumes in the development of continental drainage patterns.Nature,342:873~877.
[19]  Chung S L,Jahn B M.1995.Plume-lithosphere interaction in generation of the Emeishan flood basalts at the Permian-Triassic boundary.Geology,23:889~892.
[20]  Dam G,Larsen M,Sonderholm M.1998.Sedimentary response to mantle plumes:implications from Plaeocene onshore successions,West and East Greenland.Geology,26:207~210.
[21]  Editing Committee of Stratigraphy.2000.Permian in China.Beijing:Geological Publishing House(in Chinese).
[22]  He B,Xu Y G,Chung S-L,Xiao L,Wang Y-M.2003.Sedimentary evidence for a rapid,kilometer scale crustal doming prior to the eruption of the Emeishan flood basalts.Earth Planet.Sci.Lett.,213:391~405.
[23]  He Bin,Xu Yigang,Xiao Long,Wang Kangming,Sha Shaoli.2003.Generation and spatial distribution of the Emeishan large igneous province:New evidences from sedimentary records.Acta Geologica Sinica,77(2):194~201.
[24]  Luo Zhili,Jin Yizhong,et al.1990.The Emei taphrogenesis of the upper Yangtze platform in south China.Geological Magazine,127:393~405.
[25]  Nadin P A,Kusznir N J,Cheadle M J.1997.Early Tertiary plume uplift of the North Sea and Faeroe-Shethland Basins.Earth and Planetary Science Letters,148:109~127.
[26]  Thompson G M,Ali J R,Song Xieyang,Jolley D W.2001.Emeishan basalts,SW China:reappraisal of the formation\'s type area stratigraphy and a discussion of its significance as a large igneous province.Journal of the Geological Society,158:593~599.
[27]  Xu Yigang,Chung Sunlin,Jahn Borming,Wu Genyao.2001.Petrologic and geochemical constrains on the petrogenesis of Permia-Triassic Emeishan flood basalts in southwestern China.Lithos,58:145~168.
[28]  Wignall P B.2001.Large igneous provinces and mass extinctions.Earth Science Reviews,53:1~33.
[29]  Williams G E and Gostin V A.2000.Mantle plume uplift in the sedimentary record:Origin of kilometre-deep canyons within late Neoproterozoic successions,South Australia.Journal of the Geological Society,157:759~768.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133