帮助 关于我们

返回检索结果

古地幔柱作用“遗迹”的深部地球物理探测———以峨眉山大火成岩省为例
Geophysical Signature of the Ancient Mantle Plume Activities: A Case Study of the Emeishan Large Igneous Province

查看参考文献85篇

陈赟 1   王振华 1   郭希 1   邓阳凡 2   徐涛 1   梁晓峰 1   田小波 1   吴晶 1   陈林 1   张晰 1   唐国彬 3   徐义刚 2  
文摘 大火成岩省成因是国际地学界的研究热点,涉及地球内部运行机制和过程、资源和生物环境效应等多个地学前沿研究领域。峨眉山大火成岩省不仅是中国境内第一个获得国际学术界广泛认可的大火成岩省,也是全球范围内研究程度最高的大陆溢流玄武岩省之一。前人基于沉积地层学、岩石地球化学等系列证据提出了该大火成岩省的“地幔柱头熔融”成因模型。深部是否存在“地幔柱头熔融”假说所预示的大规模岩浆作用“遗迹”,有待地球物理探测的进一步检验。地球物理方法是探测现代地幔柱的常用手段。本项研究集成利用人工源地震、天然源宽频带地震探测,以及密集重力/地磁剖面测量等综合地球物理手段探测“古地幔柱”作用,在峨眉山大火成岩省研究中取得了系列成果,其研究思路与方法对其他古地幔柱作用 “遗迹”的识别具有重要的借鉴意义。通过几何结构-物性结构-动力学属性参数之间的联合约束,以及与地球化学、地质学研究成果的有机结合,可靠地揭示出与古地幔柱作用有关的大规模岩浆活动导致的地壳结构和组分变化以及深浅响应过程等,显示了综合地球物理方法、不同学科交叉融合在重建古老重大地质事件深部过程方面的巨大潜力。大规模岩浆作用“底侵”位置的确定、“透明”上地壳特征的发现等,对于该区未来的深部找矿具有重要的指导意义。
其他语种文摘 Formation of Large Igneous Provinces(LIPs) is one of the global multidisciplinary research fronts in geosciences, which involves the working mechanism and process of Earth's interior,and its effects on resources and environment through geologic time. The Emeishan LIP is not only the first LIP widely recognized by the international geosciences community in China,but also one of the most intensely studied LIPs in the world. Based on the sedimentary and geochemistry evidences,a model of“melting of the mantle plume head”was proposed to explain the formation of the Emeishan LIP. It will give this hypothesis a critical verification whether there exists the compositional and structural records related to plume-lithosphere interaction within the lithosphere of the LIP. In this study,we used comprehensive geophysical investigations,including active deep seismic soundings,passive broadband seismic arrays,and dense gravity /geomagnetism measurements,to identify the signature of ancient mantle plume activities. The structural geometry,physical properties, and dynamic characteristics recorded in the crust and lithospheric mantle from geophysical investigations compose a joint constraint of ancient plume activities. The crustal properties collectively suggest that a mafic layer of 15~ 20km thickness and 150~ 180km width exists at the base of the crust of the Inner Zone. Such a mafic layer reflects a vertical crustal growth through underplating of large-scale magmatism which was originated at least from the deep mantle and induced kilometer- scale domal uplift at the surface. This study provides a successful example to identify the geophysical signature of ancient mantle plume activities. The location of crustal magmatic underplating,and discovery of the overriding transparent upper crust modified by the subsequent magmatic intraplating could provide useful insights into the deep mineral exploration in this area.
来源 矿物岩石地球化学通报 ,2017,36(3):394-403 【核心库】
DOI 10.3969/j.issn.1007-2802.2017.03.003
关键词 古地幔柱 ; 峨眉山大火成岩省 ; 综合地球物理探测 ; 底侵 ; 地壳生长 ; “透明”上地壳
地址

1. 中国科学院地质与地球物理研究所, 岩石圈演化国家重点实验室, 北京, 100029  

2. 中国科学院广州地球化学研究所, 同位素地球化学国家重点实验室, 广州, 510640  

3. 桂林理工大学地球科学学院, 广西, 桂林, 541006

语种 中文
文献类型 研究性论文
ISSN 1007-2802
学科 地质学
基金 国家973计划 ;  中国科学院战略性先导科技(B类)专项 ;  国家自然科学基金项目
文献收藏号 CSCD:6012222

参考文献 共 85 共5页

1.  Ali J R. Emeishan large igneous province, SW China. Lithos,2005,79(3/4):475-489 被引 98    
2.  Anderson D L. Look again. Astronomy & Geophysics,2003,44(1):10-11 被引 6    
3.  Bryan S. Revised definition of large igneous provinces (LIPs). Earth-Science Reviews,2008,86(1/4):175-202 被引 103    
4.  Bryan S E. Large igneous provinces and silicic large igneous provinces: Progress in our understanding over the last 25 years. Geological Society of America Bulletin,2013,125(7/8):1053-1078 被引 21    
5.  Bryan S E. Silicic volcanism: An undervalued component of large igneous provinces and volcanic rifted margins. Volcanic Rifted Margins: Boulder,Colorado,Geological Society of America Special Paper,362,2002:99-120 被引 1    
6.  Campbell I H. Implications of mantle plume structure for the evolution of flood basalts. Earth and Planetary Science Letters,1990,99(1/2):79-93 被引 143    
7.  Campbell I H. Large igneous provinces and the mantle plume hypothesis. Elements,2005,1(5):265-269 被引 45    
8.  Chen Y. Crustal anisotropy from Moho converted Ps wave splitting analysis and geodynamic implications beneath the eastern margin of Tibet and surrounding regions. Gondwana Research,2013,24(3/4):946-957 被引 71    
9.  Chen Y. Magmatic underplating and crustal growth in the Emeishan Large Igneous Province, SW China, revealed by a passive seismic experiment. Earth and Planetary Science Letters,2015,432:103-114 被引 34    
10.  Christensen N I. Seismic velocity structure and composition of the continental crust: A global view. Journal of Geophysical Research,1995,100(B6):9761-9788 被引 201    
11.  Christensen N I. Poisson's ratio and crustal seismology. Journal of Geophysical Research,1996,101(B2):3139-3156 被引 129    
12.  Christiansen R L. Permian-mantle origin of the Yellowstone hotspot. Geological Society of America Bulletin,2002,114(10):1245-1256 被引 6    
13.  Chung S L. Plume-lithosphere interaction in generation of the Emeishan flood basalts at the Permian-Triassic boundary. Geology,1995,23(10):889-892 被引 232    
14.  Coffin M F. Large igneous provinces: Crustal structure, dimensions, and external consequences. Reviews of Geophysics,1994,32(1):1-36 被引 123    
15.  Cox K G. Continental magmatic underplating. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences,1993,342(1663):155-166 被引 7    
16.  Deng Y F. Mantle origin of the Emeishan large igneous province(South China) from the analysis of residual gravity anomalies. Lithos,2014,204:4-13 被引 13    
17.  Deng Y F. Magmatic underplating beneath the Emeishan large igneous province(South China) revealed by the COMGRA-ELIP experiment. Tectonophysics,2016,672/673:16-23 被引 11    
18.  Deshpande A A. Seismic evidence for crustal heterogeneity beneath the northwestern Deccan volcanic province of India from joint inversion of Rayleigh wave dispersion measurements and P receiver functions. Journal of Asian Earth Sciences,2016,128:54-63 被引 1    
19.  Ernst R E. Recognizing mantle plumes in the geological record. Annual Review of Earth and Planetary Sciences,2003,31(1):469-523 被引 48    
20.  Erwin D H. The Great Paleozoic Crisis: Life and Death in the Permian,1993:327 被引 8    
引证文献 14

1 徐义刚 二叠纪地幔柱与地表系统演变 矿物岩石地球化学通报,2017,36(3):359-373
被引 21

2 陈赟 燕山期重大地质事件关键廊带的地球物理探测 矿物岩石地球化学通报,2017,36(4):560-566,534
被引 0 次

显示所有14篇文献

论文科学数据集
PlumX Metrics
相关文献

 作者相关
 关键词相关
 参考文献相关

版权所有 ©2008 中国科学院文献情报中心 制作维护:中国科学院文献情报中心
地址:北京中关村北四环西路33号 邮政编码:100190 联系电话:(010)82627496 E-mail:cscd@mail.las.ac.cn 京ICP备05002861号-4 | 京公网安备11010802043238号