Ultradeep diamonds originate from deep subducted sedimentary
本文选题：Ultradeep + diamond ； 参考：《Science China(Earth Sciences)》2017年02期
【摘要】：Diamonds are renowned as the record of Earth's evolution history.Natural diamonds on the Earth can be distinguished in light of genetic types as kimberlitic diamonds(including peridotitic diamonds and eclogitic diamonds),ultrahigh-pressure metamorphic diamonds and ophiolitic diamonds.According to the inclusion mineralogy,most diamonds originated from continental lithospheric mantle at depths of 140-250 km.Several localities,however,yield ultradeep diamonds with inclusion compositions that require a sublithospheric origin(~250 km).Ultradeep diamonds exhibit distinctions in terms of carbon isotope composition,N-concentration,mineral inclusions and so on.The present study provides a systematic compilation concerning the features of ultradeep diamonds,based on which to expound their genesis affinity with mantle-carbonate melts.The diamond-parental carbonate melts are proposed to be stemmed from the Earth's crust through subduction of oceanic lithosphere.Ultradeep diamonds are classified into a subgroup attaching to kimberlitic diamonds grounded by formation mechanism,and present connections in respect of carbon origin to eclogitic diamonds,ultrahigh-pressure metamorphic diamonds and ophiolitic diamonds.
[Abstract]:Diamonds are renowned as the record of Earth's evolution history.Natural diamonds on the Earth can be distinguished in light of genetic types as kimberlitic diamonds(including peridotitic diamonds and eclogitic diamonds),ultrahigh-pressure metamorphic diamonds and ophiolitic diamonds.According to the inclusion mineralogy,most diamonds originated from continental lithospheric mantle at depths of 140-250 km.Several localities,however,yield ultradeep diamonds with inclusion compositions that require a sublithospheric origin(~250 km).Ultradeep diamonds exhibit distinctions in terms of carbon isotope composition,N-concentration,mineral inclusions and so on.The present study provides a systematic compilation concerning the features of ultradeep diamonds,based on which to expound their genesis affinity with mantle-carbonate melts.The diamond-parental carbonate melts are proposed to be stemmed from the Earth's crust through subduction of oceanic lithosphere.Ultradeep diamonds are classified into a subgroup attaching to kimberlitic diamonds grounded by formation mechanism,and present connections in respect of carbon origin to eclogitic diamonds,ultrahigh-pressure metamorphic diamonds and ophiolitic diamonds.
【作者单位】： Key
【基金】：supported by National Natural Science Foundation of China (Grant Nos.U1232204 & 41473056)
【分类号】：P619.241
【相似文献】
相关期刊论文 前10条
1 ;Variation of the grand mean value of Si-O distances in metamorphic reactions[J];Chinese Science Bulletin;2001年08期
2 李兆麟;;A study on the relationships between metamorphic anatexis and petrogenesis and mineralization[J];Chinese Journal of Geochemistry;2007年01期
3 ;FEM simulation of formation of metamorphic core complex with ANSYS software[J];Global Geology;2007年01期
4 ;Experimental study of the metamorphic reaction involving melt under high temperature and high pressure[J];Chinese Science Bulletin;1998年03期
5 ;Syn-deformation P-T paths of Xiaoqinling metamorphic core complex[J];Chinese Science Bulletin;1998年22期
6 ;The early Proterozoic metamorphic geodynamics of the Jiao-Liao Massif, east China[J];Journal of Geoscientific Research in Northeast Asia;1999年01期
7 ;THE PROVENANCE OF THE DHARAMSALA FORMATION[J];地学前缘;2000年S1期
8 ;First occurrence of preiswerkite in the Dabie UHP metamorphic belt[J];Chinese Science Bulletin;2000年08期
9 ;Source and location mechanism for lode gold deposits hosted in metamorphic rocks in northeastern Hunan, China[J];Journal of Central South University of Technology(English Edition);2001年02期
10 王涛,郑亚东,李天斌,马铭波,高永军;Structures of mylonitic granites of the Yagan metamorphic core complex on Sino-Mongolian border--implications for its kinematics and chronology[J];Progress in Natural Science;2001年10期
相关会议论文 前10条
1 ;Variation of the grand mean value of Si-O distances in metamorphic reactions[A];中国科学院地质与地球物理研究所2001学术论文汇编（第二卷）[C];2001年
2 Ching-Hua Lo;Simon A.Wilde;Gregory A.Davis;;Rapid exhumation and cooling of the Liaonan metamorphic core complex:Inferences from ~(40)Ar/~(39)Ar thermochronology and implications for Late Mesozoic extension in the eastern North China Craton[A];中国科学院地质与地球物理研究所2007学术论文汇编(第二卷)[C];2008年
3 J. Hoefs;A.M. van den Kerkhof;J. Fiebig;;Different fluid histories during the metamorphic evolution of North Dabie and South Dabie, China: evidence from oxygen isotopes and fluid inclusions[A];地壳深部压力状态与地质作用学术研讨会论文集[C];2003年
4 ;Fluid inclusions hidden in coesite-bearing zircons from ultrahigh-pressure metamorphic rocks in southwestern Sulu terrane, eastern China[A];2004年全国岩石学与地球动力学研讨会论文摘要集[C];2004年
5 Song Huang;Yiting Duanmu;Zhanwei Hui;Mengyu Ji;;Metamorphic Testing of Spatial Distance Measuring Function of GIS[A];2012年计算机应用与系统建模国际会议论文集[C];2012年
6 ;Geochronology and geochemistry of high-grade metamorphic complex from the Grove Mountains, East Antarctica: implications for the evolution of the Prydz Belt[A];2006年全国岩石学与地球动力学研讨会论文摘要集[C];2006年
7 ;Coesite eclogite facies metamorphic tectonite:evidence for ultrahigh pressure deformation[A];中国科学院地质与地球物理研究所2002学术论文摘要汇编[C];2002年
8 ;Geochronology of source materials from high-pressure and ultrahigh-pressure metamorphic rocks in Jurassic sedimentary rocks of Hefei Basin[A];中国科学院地质与地球物理研究所二○○三学术论文汇编·第四卷(油气资源)[C];2003年
9 ;Two ultrahigh pressure metamorphic events recognized in the Central Orogenic Belt of China: evidence from the U-Pb dating of coesite-bearing zircons[A];2004年全国岩石学与地球动力学研讨会论文摘要集[C];2004年
10 P.J.O'Brien;;High-pressure granulites in the Sanggan area,North China craton:metamorphic evolution,P-T paths and geotectonic significance[A];中国科学院地质与地球物理研究所2002学术论文摘要汇编[C];2002年
，本文编号：2069034
本文链接：https://www.wllwen.com/kejilunwen/kuangye/2069034.html
