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...
地质学报  2001 

冲绳海槽中部Jade热液活动区中块状硫化物的稀土元素地球化学特征

, PP. 244-249

Keywords: 稀土元素块状硫化物Jade热液活动区冲绳海槽地球化学稀土元素

Full-Text   Cite this paper   Add to My Lib

Abstract:

用ICP-MS对冲绳海槽Jade热液活动区中6个块状硫化物样品进行了稀土元素分析。除一个样品表现出极微弱的正Eu异常外(δEu=1.09),其他样品均表现出负Eu异常(δEu=0.58-0.71)和LREE相对富集((La/Yb)N=1.29-47.87)的球粒陨石标准化配分模式。块状硫化物样品之间稀土元素组成的变化是由于热液流体-岩石的相互作用以及海水和热液流体不同程度混合的结果,与深海沉积物,火山岩和海水稀土元素配分模式对比,表明块状硫休物的REE部分来自沉积物和火山岩,海水的混合作用对块状硫化物的REE配分模式具有一定的影响。海底热液硫化物稀土元素组成的变化可以一定程度的反映在出热液流体的演化特征。

References

[1]  Alt J C. 1988. The chemistry andsuffur isotope composition of massive sulfide and associated deposits on Green Seamount,Eastern Pacific.Econ. Geol. , 83:1026~ 1033.
[2]  Halbach P, Nakamura K, Wahsner M, et al. 1989. Probable modern analogue ofkuroko-type massive sulfide deposits in the Okinawa trough back-arc basin. Nature, 338:496~499.
[3]  Halbach P,Hansmann W,Koppel V,Pracejus B. 1997. Whole-rock and sulfide lead-isotopedata from the hydrothermal JADE field in the Okinawa back-arc trough. Mineralium Deposita,32:70~78.
[4]  Humphris S E. 1998. Rare earth element composition of anhydrite: Implications fordeposition and mobility within the active TAG hydrothermal mound. Proc. ODP,Sci. Res. ,158:143~159.
[5]  Hou Z Q,Uraba T. 1996. A comparative study on geochemistry of sulfide ores from theKuroko-type deposits on ancient and modern seafloor. Geochimica, 25 : 228 ~ 239 (inChinese with English abstract).
[6]  Hou Z Q, Zhang Q L. 1998. CO2-hydrocarbon fluids of the Jade hydrothermal field inthe Okinawa Trough:fluid inclusion evidence.Sciences in China(D), 28:142~148 (in Chinesewith English abstract).
[7]  Li N S. 1995. Geothermics of the Okinawa Trough. Qingdao:Qingdao Press (inChinese).
[8]  Piepgras D,Jacobsen S B. 1992. The behavior of rare earth elements inseawater:Precise determination of variations in the North Pacific water column. Geochim.Cosmochim. Acta, 56:1851~1862.
[9]  Sverjensky D A. 1984. Europium redox equilibria in aqueous solution.Earth Planet.Sci. Lett.;67: 70~78.
[10]  Wood S A. 1990. The aqueous geochemistry of the rare-earth elements and yttrium.2. theoretical predictions of speciation in hydrothermal solutions to 350°C at saturationwater vapor pressure. Chem. Geol. ,88:99~125.
[11]  Zhai S K,Gan X Q. 1995. Mineralogical and petrochemical characteristics of basaltfrom the hydrothermal field of the Okinawa Trough and its geological significance.Oceanologia et Limnologia Sinica,26:115~ 123 (in Chinese with English abstract).
[12]  Zhao Y Y,Yan M C. 1994. Geochemistry of sediments of the China shelf sea.Beijing:Science Press (in Chinese).
[13]  Gillis K M,Smith A D,Ludden J N. 1990. Trace element and Sr isotopic contents ofhydrothermal clays and sulfides from the Snakepit hydrothermal field: ODP site 649. Proc.ODP, Sci. Res. , 106/109:
[14]  Halbach P, Pracejus B, Marten A. 1993. Geology and mineralogy of massive sulfideores from the central Okinawa Trough, Japan. Econ. Geol. ,88:2210~2225.
[15]  Hou Z Q,Urabe T. 1997. Chemistry and zoning for metal elements in massive sulfideores and sulfide chimneys from the central Okinawa Trough, west Pacific. Acta GeoscientiaSinica, 18:171~181 ( in Chinese with English abstract).
[16]  Li W R, Yang Z S, Wang Y J, Zhang B M. 1997. The petrochemical features of thevolcanic rocks in Okinawa Trough and their geological significance. Acta PetrologicaSinica, 13:538~550 (in Chinese with English abstract).
[17]  Mills R A,Elderfield H. 1995. Rare earth element geochemistry of hydrothermaldeposits from the active TAG mound, 26°N Mid-Atlantic Ridge. Geochim. Cosmochim. Acta,59: 3511 ~ 3524.
[18]  Wu M Q. 1991. Some geochemical characteristics of rare earth and trace elements inthe sediments from the Okinawa Trough. Acta Oceanologica Sinica, 13: 75~81 (in Chinesewith English abstract).
[19]  Zeng Z G,Jiang F Q,Zhai S K,Qin Y S,Hou Z Q. 2000a. Sulfur isotopic composition ofseafioor hydrothermal sediment from the Jade hydrothermal field in the central OkinawaTrough and its geological significance. Acta Oceanologica Sinica, 22 (4):74~82 (inChinese with English abstract).
[20]  Zeng Z G,Jiang F Q,Zhai S K,Qin Y S. 2000b. Lead isotopic compositions of massivesulfides from the Jade hydrothermal field in the Okinawa Trough and its geologicalimplications. Geochimica, 29(3) :239~245 (in Chinese with English abstract).

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133