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Characteristics of Sr, Nd and Pb isotopic compositions of hydrothermal Si-Fe-Mn-oxyhydroxides at the PACMANUS hydrothermal field, Eastern Manus Basin

YANG Baoju,  ZENG Zhigang,  WANG Xiaoyuan

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文章导航 > Acta Oceanologica Sinica  > 2015 >  34(8): 27-34
杨宝菊, 曾志刚, 王晓媛. 东马努斯海盆PACMANUS热液区Si-Fe-Mn-羟基氧化物的Sr、Nd、Pb同位素特征[J]. 海洋学报英文版, 2015, 34(8): 27-34. doi: 10.1007/s13131-015-0706-8
引用本文: 杨宝菊, 曾志刚, 王晓媛. 东马努斯海盆PACMANUS热液区Si-Fe-Mn-羟基氧化物的Sr、Nd、Pb同位素特征[J]. 海洋学报英文版, 2015, 34(8): 27-34. doi: 10.1007/s13131-015-0706-8
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YANG Baoju, ZENG Zhigang, WANG Xiaoyuan. Characteristics of Sr, Nd and Pb isotopic compositions of hydrothermal Si-Fe-Mn-oxyhydroxides at the PACMANUS hydrothermal field, Eastern Manus Basin[J]. Acta Oceanologica Sinica, 2015, 34(8): 27-34. doi: 10.1007/s13131-015-0706-8
Citation: YANG Baoju, ZENG Zhigang, WANG Xiaoyuan. Characteristics of Sr, Nd and Pb isotopic compositions of hydrothermal Si-Fe-Mn-oxyhydroxides at the PACMANUS hydrothermal field, Eastern Manus Basin[J]. Acta Oceanologica Sinica, 2015, 34(8): 27-34. doi: 10.1007/s13131-015-0706-8
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东马努斯海盆PACMANUS热液区Si-Fe-Mn-羟基氧化物的Sr、Nd、Pb同位素特征

doi: 10.1007/s13131-015-0706-8
  • 1.

    中国青岛 266071 中国科学院海洋研究所海洋地质与环境重点实验室海底热液活动实验室;中国北京 100049 中国科学院大学

  • 2.

    中国青岛 266071 中国科学院海洋研究所海洋地质与环境重点实验室海底热液活动实验室

基金项目: The National Key Basic Research Program of China under contract No. 2013CB429700; the National Special Fund for the 12th Five Year Plan of COMRA under contract No. DY125-12-R-05; the Strategic Priority Research Program of the Chinese Academy of Sciences under contract No. XDA11030302; the National Special Fund for the 12th Five Year Plan of COMRA under contract Nos DY125-12-R-02 and DY125-11-R-05; the National Natural Science Foundation of China under contract Nos 41325021, 40830849 and 40976027; Shandong Province Natural Science Foundation of China for Distinguished Young Scholars under contract No. JQ200913.

Characteristics of Sr, Nd and Pb isotopic compositions of hydrothermal Si-Fe-Mn-oxyhydroxides at the PACMANUS hydrothermal field, Eastern Manus Basin

  • 1.

    Seafloor Hydrothermal Activity Laboratory of the Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;University of Chinese Academy of Sciences, Beijing 100049, China

  • 2.

    Seafloor Hydrothermal Activity Laboratory of the Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China

    摘要
  • 摘要: 在东马努斯海盆PACMANUS(巴布亚新几内亚-澳大利亚-加拿大-马努斯)热液区拖网获取的Si-Fe-Mn-羟基氧化物Sr、Nd、Pb同位素的变化范围为:87Sr/86Sr = 0.708079-0.708581;εNd = 5.149833-6.534826;208Pb/204Pb = 38.245-38.440;207Pb/204Pb = 15.503-15.560;206Pb/204Pb = 18.682-18.783.样品的87Sr/86Sr比值变化范围相对均一,接近周围海水的87Sr/86Sr比值(0.70916).海水对样品贡献的Sr含量占总量的76.7%-83.1%.热液流体与海水的混合温度在53.2℃到72.2℃之间,温度变化范围较大说明热液活动不稳定.所有样品的εNd值均为正值,与水成成因的铁锰结核(结壳)明显不同.样品中的Nd主要来自热液活动对基底岩石的淋滤,并保留了热液活动的信息.样品的Pb同位素变化范围较小.除了样品#9-2具有相对较高的Pb同位素组成外,大部分样品的Pb同位素组成变化范围较小.其中大部分样品的208Pb/204Pb和207Pb/204Pb比值与东马努斯海盆岩石、岩浆,PACMANUS硫化物的值类似,暗示样品的Pb来自热液流体对东马努斯海盆基底岩石的淋滤.另外,样品的208Pb/204Pb和207Pb/204Pb比值稍微偏低,说明热液流体在基底岩石中的循环过程并不充分,或者热液活动在过去出现了间歇性的暂停,Si-Fe-Mn-羟基氧化物保存了基底岩石的不均一性.
    Abstract: Si-Fe-Mn-oxyhydroxides dredged at the PACMANUS (Papua New Guinea-Australia-Canada-Manus) hydrothermal field, Eastern Manus Basin, have 87Sr/86Sr=0.708 079-0.708 581; εNd=5.149 833-6.534 826; 208Pb/204Pb=38.245-38.440; 207Pb/204Pb=15.503-15.560; 206Pb/204Pb=18.682-18.783. 87Sr/86Sr isotope ratios are relatively homogeneous and close to the value of the surrounding seawater (0.709 16). The content of Sr in the samples contributed by seawater was estimated to be 76.7%-83.1% of total amount. The mixing temperature of hydrothermal fluids and seawater were ranging from 53.2℃ to 72.2℃ and the hydrothermal activities were unstable when the samples precipitated. The εNd values of all the samples are positive, which differ from the values of ferromanganese nodules (crusts) with hydrogenic origin. Nd was mainly derived from substrate rocks leached by hydrothermal circulation and preserved the hydrothermal signature. Pb isotopic compositions of most samples show minor variability except Sample #9-2 that has relatively high values of Pb isotopes. The Pb may be derived from the Eastern Manus Basin rocks leached by the hydrothermal fluid. The slightly lower 208Pb/204Pb and 207Pb/204Pb values of the samples indicated that the hydrothermal circulation in PACMANUS was not entire and sufficient, or that hydrothermal circulation had transient changes in the past. Si-Fe-Mn-oxyhydroxides in the samples preserved the heterogeneities of local rocks.
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    Emerson D, Moyer C L. 2002. Neutrophilic Fe-oxidizing bacteria are abundant at渠整牨慥氠楌穯慩瑨楩漠湓?慡汭潯湵杮?琠桨敹?慲捯瑴楨癥敲??慬爠楶慥湮慴?愠湡摮?猠潰畬瑡桹攠牡渠??穪畯??潲湯楬湥?慩牮挠?獥礠獯瑸敩浤??睤敥獰瑯敳物湴?偯慮挮椠晁楰捰?????敩潲灯桮礠獍?剣敲獯??????????????匰???戳爰??攼止楲渾楆慡湵?剥???漠昱昹攸父琮?????慣物煰畬敥?倠??攠瑉?慯汴?????????祧摹爮漠琲桮敤爠浥慤氮??敥?愠湙摯?卫椺?潗硩祬桥祹搬爠漱破椱搭攱‵搳攼灢潲猾楆瑯獵?晵牥潴洠?匬漠畍瑡桲?偯慵捸椠晅椮挠?椹渹琵爮愠灌汥慡瑤攠?癳潯汴捯慰湥漠敳獹?慴湥摭??慩獣瑳?偩慮挠楐晡楣捩?剩楣猠敨?愭硤楲慯汴?慥湲摭?潬映晳?慬硦楩慤汥?牤敥杰楯潳湩獴???捊漠湇??数潨汹????????‰日〨???呼ㄠ财??戵爭??爴椰猼换桲放癆慯????却挠潙琬琠?卯?????っに????敲潧挠桕攬洠楃獨瑡牲祬?慵渠摊?浌漬爠灥桴漠污潬朮礠?漹昹?洮攠瑈慹汤汲楯晴敨牥潲畭獡?猠敡摣楴浩敶湩瑴獹?慩湮搠?潨硥礠桌祡摵爠潢硡楣摫攭獡?晣爠潢浡?瑩桮攺??湵摬敦慩癤?潳甠牡?獤攠杷浡整湥瑲???略慭湩?摴敲??甠捇慥?剬楯摧杹攬???攨漴挩栺椠洳‰?漭猳洰漶挼桢楲派??捡瑮慫???ㄠ????????????????扩牮??楹稠慁猬愠?????愮眠愲猰愰欶椮?????慡敲摩慮????敤瑲?愭汴?????????祮摴物潮瑧栠敲牥浬慡汴?獤甠汴景椠摶敯?扣敡慮物楳湭朠??攠?卨楥?潌硥祳桳祥摲爠潁确楴摩敬?摥敳瀺漠獅楶瑩獤?普牣潥洠?瑲桯敭??潥牲楲潯汭楡獮?呡牮潥畳来栠獰??噣慩湰畩慴瑡畴?扳愮挠歇慥牯捣??獭漠畇瑥桯睰敨獹琠敇牥湯?偹愬挠椷昨椴挩???愰爴‰?攰漼汢?￣??????????ㄧ????扳爠??態洬攠湈敥瑩獮欠祊?噒?匠???楡湬渮猠?刹?????攰洠浍敹汲氠??????敳琠?慦氠???はひㄠ??健慭牥敮湴瑳愠污?扤愠獐慢氭瑎?椠捩?浯整汯瑰獥?愠湦摲?晭氠畨楹摤獲?楧湥?敯慵獳琠敦牥湲??慭湡畮猭?扡慮捥歳慥爠捣??慳獴楳渺??楥浣灯汮楳捴慲?瑣楴潩湯獮?景潦爠?桥祡摷牡潴瑥桲攠牰浡慬汥?浣楨湥敭物慳汴楲獹愮琠楇潥湯???慭爠瑃桯?偭汯慣湨敩瑭?十捣楴??攠琶琳??????????????????监?扲爾??慥牴決???????爬椠瑓瑣慨楷湡??????呡業汰扥牲潡漠歕?????????????礠摥牴漠瑡桬攮爠洲愰氰?愮渠摈?浤楲捯爭潴?扥楲慭污?瀠牡潣捴敩獶獩整獹?慡瑮??潭楡桧業?匠敧慥浮潥畳湩瑳??慬?浮楧搠?瀠汰慲瑯数?桧潡瑴?獮灧漠瑢?癣潫氭捡慲湣漠???敩敮瀺?卖敡慬?删敆獡?偒瑩?????????????????ㄠ????扮爩??楊洠?????敹敳?????攠攱???奂??呼?あ??′匰??卢牲??慡湭摯?偔戬?楏獫潡瑭潵灲楡挠?猬礠獃瑨敡浲慬瑯極挠獊?潌昬?桥祴?摡牬漮琠栱改爹洷愮氠?捣桩楤浩湣攠祡?灤爠敳捵楬灦楡瑴慥琭敲獩?晨爠潨浹?瑲桯整??慲獭瑡敬爠湦??慩湤畳猠??慯獭椠湴??眠敍獡瑮敵牳渠?偡慣捫椭晡楲捣???癳慩汮甬愠瑐楡潰湵?漠晎?海愠杇浵慩瑮楥捡?挠潇湥瑯牬楯执畹琬椠漲渵?琲漩?栠礱搳爹漭琱栴攲爼浢慲氾?獥祲獭瑡敮洠?????敋潬灩桮祫獨?剭敭獥?????????????ㄠ?㈠???扥牴??慬爮琠椱渹改稰????呤慲祯氭潴牨???????????慮捧歩慮牧挠?獦瀠牲敡慲摥椭湥条??牨椠晥瑬楥湭来??慳渠摩?洠楴捨牥漠?灣汥慡瑮攮?牎潡瑴慵瑲楥漬渠??戵攨琶眲攷攵温?琠爵愱渶猭昵漱爸洼?晲愾畇汯瑬獤?楴湥?瑮栠敓??愬渠畈獥??慩獮楧渠???愮爠′?攰漳瀮栠祌獯?剧攭獬????????????っ??????扲牳??楮氠汯獣?剡????坡数汨汹猬??????剣潥扡敮牯瑧獲?印??水?ち????散湥攭獳楨獥?潴映?晹敮牡牭潩浣慳渮朠慔湲敥獡整?捳牥甠獯瑮猠?晥牯潣浨?瑭桩敳?呲???栶示搠爴漵琳栭攴爸洹愼汢?显楈敡汬摬???桹攠流??攬漠汄????????????㈠???????扐爬?健慴爠歡?匮?????攮攠?卥?????慦浥敲湯潵癳??????敭瑥?慴汳???つㄠぴ??吠牳慣捡楶湥杮?瑩桮敧?潲牥楳杩楤湥?潣晥?獴畩扭摥甠捯瑦椠潎湤?据潥浡灲漠湨敹湤瑲獯?扴敨湥敲慭瑡桬?瑶桥敮?即漮甠瑇桥??慨獹瑳?牒楥晳琠?楥湴?琬栠攱??愸温町猠??愱猭椷渶??偢慲瀾畈慥?乮攠睊??甬椠湋敯慳???桮敳浫??敁漬氠????????????????????戹爷?倠敉瑲敯牮猠敡湮?匠???敧牡穮楥杳?倠???慤湥渠業湩杮瑥潲湡??????敯瑮?慩汮???づ?????潦汩摣?爠楇捥桯?浯慧獩獣楡癬攠?獯畣汩晥楴摹攬猠?景牮潤浯?琬栠敓?楥湣瑩敡牬椠潐牵?潬晩?瑡桴敩?普敳氬猠椱挱?栨漱猩琺攠搱′倳????丼啢卲￣浈慥獩獮椠癊攠?猬甠汓晣楨摵敬?搠敍瀠潓猬椠瑄???慡獭琠敒爠湅??慥湴甠獡??愠猲椰渰??倠乄?????湥???汯楷?潨灹潤畲汯漭獴????敡摬???楮湧敡牮慥汳??硭灩氀漀爀愀琀椀漀渀??渀搀?匀甀猀琀愀椀渀愀戀氀攀??攀瘀攀氀漀瀀?洀攀渀琀??刀漀琀琀攀爀搀愀洀???椀氀氀瀀爀攀猀猀??????????戀爀?刀攀攀瘀攀猀???倀??匀攀攀眀愀氀搀???匀??匀愀挀挀漀挀椀愀?倀??攀琀?愀氀???　?????攀漀挀栀攀洀椀猀琀爀礀?漀昀?栀礀?搀爀漀琀栀攀爀洀愀氀?昀氀甀椀搀猀?昀爀漀洀?琀栀攀?倀????一唀匀??一漀爀琀栀攀愀猀琀?倀甀愀氀?愀渀搀?嘀椀?攀渀渀愀?圀漀漀搀猀?栀礀搀爀漀琀栀攀爀洀愀氀?昀椀攀氀搀猀???愀渀甀猀??愀猀椀渀??倀愀瀀甀愀?一攀眀?戀爀??甀椀渀攀愀???攀漀挀栀椀洀??漀猀洀漀挀栀椀洀??挀琀愀??????????　????????戀爀?刀攀礀渀漀氀搀猀???????爀愀渀欀????伀?一椀漀渀猀?刀??????????一搀??愀渀搀?倀戀?椀猀漀琀漀瀀攀?琀椀洀攀?猀攀爀椀攀猀?昀爀漀洀??琀氀愀渀琀椀挀?昀攀爀爀漀洀愀渀最愀渀攀猀攀?挀爀甀猀琀猀??椀洀瀀氀椀挀愀琀椀漀渀猀?昀漀爀?挀栀愀渀最攀猀?椀渀?瀀爀漀瘀攀渀愀渀挀攀?愀渀搀?瀀愀氀攀漀挀椀爀挀甀氀愀琀椀漀渀?漀瘀攀爀?琀栀攀?氀愀猀琀????礀爀???愀爀琀栀?倀氀愀渀攀琀?匀挀椀??攀琀琀??????????????????戀爀?匀挀漀琀琀?匀?????椀渀渀猀?刀???????????礀搀爀漀琀栀攀爀洀愀氀?瀀爀漀挀攀猀猀攀猀?愀渀搀?挀漀渀琀爀愀猀琀椀渀最?猀琀礀氀攀猀?漀昀?洀椀渀攀爀愀氀椀稀愀琀椀漀渀?椀渀?琀栀攀?眀攀猀琀攀爀渀?圀漀漀搀氀愀爀欀?愀渀搀?攀愀猀琀攀爀渀??愀渀甀猀?戀愀猀椀渀猀?漀昀?琀栀攀?眀攀猀琀攀爀渀?倀愀挀椀昀椀挀???攀漀氀?匀漀挀??漀渀搀漀渀?匀瀀攀?倀甀戀??????????????　??戀爀?匀椀渀琀漀渀???????漀爀搀???????栀愀瀀瀀攀氀氀????攀琀?愀氀???　　????愀最洀愀?最攀渀攀猀椀猀?愀渀搀?洀愀渀琀氀攀?栀攀琀攀爀漀最攀渀攀椀琀礀?椀渀?琀栀攀?洀愀渀甀猀?戀愀挀欀??爀挀??愀猀椀渀??倀愀瀀甀愀?一攀眀??甀椀渀攀愀????倀攀琀爀漀氀?????????????????戀爀?匀琀甀愀爀琀???????氀氀愀洀?刀?????甀挀欀眀漀爀琀栀?刀???????????攀琀愀氀?猀漀甀爀挀攀猀?椀渀?琀栀攀??椀搀搀氀攀?嘀愀氀氀攀礀?洀愀猀猀椀瘀攀?猀甀氀瀀栀椀搀攀?搀攀瀀漀猀椀琀??渀漀爀琀栀攀爀渀??甀愀渀?搀攀??甀挀愀?刀椀搀最攀??倀戀?椀猀漀琀漀瀀攀?挀漀渀猀琀爀愀椀渀琀猀???栀攀洀??攀漀氀????????????????????戀爀?匀甀渀?娀栀椀氀攀椀??娀栀漀甀??甀愀椀礀愀渀最???氀愀猀戀礀???倀??攀琀?愀氀???　?????漀爀洀愀琀椀漀渀?漀昀??攀??渀?匀椀?漀砀椀搀攀?愀渀搀?渀漀渀琀爀漀渀椀琀攀?搀攀瀀漀猀椀琀猀?椀渀?栀礀搀爀漀琀栀攀爀洀愀氀?昀椀攀氀搀猀?漀渀?琀栀攀?嘀愀氀甀??愀?刀椀搀最攀???愀甀??愀猀椀渀?????猀椀愀渀??愀爀琀栀?匀挀椀???????????????戀爀?吀愀礀氀漀爀???????????椀猀洀愀爀挀欀?匀攀愀???瘀漀氀甀琀椀漀渀?漀昀?愀?戀愀挀欀?愀爀挀?戀愀猀椀渀???攀漀氀漀最礀????????????????戀爀?吀爀攀最漀渀椀渀最?倀???　　???倀氀愀琀攀?欀椀渀攀洀愀琀椀挀猀?椀渀?琀栀攀?眀攀猀琀攀爀渀?倀愀挀椀昀椀挀?搀攀爀椀瘀攀搀?昀爀漀洀?最攀漀搀攀琀椀挀?漀戀猀攀爀瘀愀琀椀漀渀猀?????攀漀瀀栀礀猀?刀攀猀???　????????　?　?戀爀?瘀愀渀?搀攀??氀椀攀爀搀琀?吀???爀愀渀欀?????愀氀氀椀搀愀礀???一??攀琀?愀氀???　　???吀爀愀挀椀渀最?琀栀攀?栀椀猀?琀漀爀礀?漀昀?猀甀戀洀愀爀椀渀攀?栀礀搀爀漀琀栀攀爀洀愀氀?椀渀瀀甀琀猀?愀渀搀?琀栀攀?猀椀最渀椀昀椀挀愀渀挀攀?漀昀?栀礀搀爀漀琀栀攀爀洀愀氀?栀愀昀渀椀甀洀?昀漀爀?琀栀攀?猀攀愀眀愀琀攀爀?戀甀搀最攀琀?愀?挀漀洀戀椀渀攀搀?倀戀??昀?一搀?椀猀漀琀漀瀀攀?愀瀀瀀爀漀愀挀栀???愀爀琀栀?倀氀愀渀攀琀?匀挀椀??攀琀琀??????????????????戀爀?圀椀渀琀攀爀???????漀栀渀猀漀渀???????氀愀爀欀????????????匀琀爀漀渀琀椀甀洀??渀攀漀搀礀洀椀甀洀??愀渀搀?氀攀愀搀?椀猀漀琀漀瀀攀?瘀愀爀椀愀琀椀漀渀猀?漀昀?愀甀琀栀椀最攀渀椀挀?愀渀搀?猀椀氀椀挀愀琀攀?猀攀搀椀洀攀渀琀?挀漀洀瀀漀渀攀渀琀猀?昀爀漀洀?琀栀攀??愀琀攀??攀渀漀稀漀椀挀??爀挀琀椀挀?伀挀攀愀渀???洀瀀氀椀挀愀?琀椀漀渀猀?昀漀爀?猀攀搀椀洀攀渀琀?瀀爀漀瘀攀渀愀渀挀攀?愀渀搀?琀栀攀?猀漀甀爀挀攀?漀昀?琀爀愀挀攀?洀攀琀愀氀猀?椀渀?猀攀愀眀愀琀攀爀???攀漀挀栀椀洀??漀猀洀漀挀栀椀洀??挀琀愀?????????????????　　?戀爀?娀攀渀最?娀栀椀最愀渀最??伀甀礀愀渀最??攀最攀渀??夀椀渀?堀甀攀戀漀??攀琀?愀氀???　?????漀爀洀愀琀椀漀渀?漀昀??攀?匀椀??渀?漀砀礀栀礀搀爀漀砀椀搀攀猀?愀琀?琀栀攀?倀????一唀匀?栀礀搀爀漀琀栀攀爀洀愀氀?昀椀攀氀搀???愀猀琀攀爀渀??愀渀甀猀??愀猀椀渀??洀椀渀攀爀愀氀漀最椀挀愀氀?愀渀搀?最攀漀挀栀攀洀椀挀愀氀?攀瘀椀搀?攀渀挀攀?????猀椀愀渀??愀爀琀栀?匀挀椀???　????　????
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  • 收稿日期:  2014-07-11
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