台湾东部泥火山水。第一部分:罗山泥火山H、三O、三Sr同位素及微量元素

IF 0.8 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY
H. Chao, C. You, I. Lin, Hsueh-Yu Lu, Hou-Chun Liu, C. Chung
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引用次数: 1

摘要

泥火山是沉积盆地和俯冲带深部挥发性物质向地表迁移的重要通道之一。从2002年至2021年,对台湾省东部罗山省18个泥池的中压流体进行了采样。测定了主要成分和微量成分以及氢、三O (δ18O和Δ17O)和三Sr同位素(87Sr/86Sr和δ88Sr)。结果表明:水的主要成分是Cl-、Na和Ca,与海水相比,中山坳水的化学特征与低温脊侧热液和还原状态下的海相孔隙水相似。主要成分以及H、三O和87Sr/86Sr的时空变化有限,表明泥池水体在区域上属于同一源区。2003年以前南部泥塘87Sr/86Sr轻度放射性成因的流体储集层与北部不同。北部泥塘水体87Sr/86Sr变化较小,表明两个流体储层近地表混合。各组分间的相关性表明,泥沙组分的添加是主要因素,而蒸发是保守组分的关键因素。综上所述,MV - LS泥浆池排出的水体来自同一区域,其微量元素组成如Mg、K、Sr以及87Sr/86Sr等,随着储层位置的不同而略有不同。在19年的调查中,发现了中压地下储层具有小振动的稳定源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Water of eastern Taiwan mud volcanoes. Part I. H, triple O, triple Sr isotopes, and trace elements of Lo-Shan mud volcano
Mud volcano (MV) is one of the most important passageways for deep seated volatile materials to migrate back to Earth’s surface in sedimentary basins and subduction zones. Waters of MV fluid emitted from 18 mud pools in MV Luo-Shan (LS) in eastern Taiwan were sampled from the year 2002 to the year 2021. Major and trace components as well as H, triple O (δ18O and Δ17O) and triple Sr isotopes (87Sr/86Sr and δ88Sr) were measured. The results show that major components of water are Cl-, Na and Ca. Compared with seawater, water of MV LS reveals similar chemical characteristics with low-temperature ridge-flank hydrothermal spring and marine pore water in reducing condition. Limited spatial and temporal variation of major components as well as H, triple O and 87Sr/86Sr indicates waters emitted by mud pools come from the same source regionally. Slightly radiogenic 87Sr/86Sr at southern mud pools and before the year 2003 denotes different fluid reservoir from northern ones. Small 87Sr/86Sr variation in waters of northern mud pools indicates near surface mixing from 2 fluid reservoirs. The correlation among all components reveals sediment component addition is the major factor and evaporation is the key factor for conservative elements. In summary, waters expelled by MV LS mud pools originate from the same regional source, and their trace element composition such as Mg, K, Sr as well as 87Sr/86Sr slightly varies, depending on the location of the reservoir they are hosted. A stable source with small vibration of fluid reservoir of MV LS is indicated during the 19-years investigation period.
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来源期刊
CiteScore
2.00
自引率
0.00%
发文量
29
审稿时长
4.5 months
期刊介绍: The major publication of the Chinese Geoscience Union (located in Taipei) since 1990, the journal of Terrestrial, Atmospheric and Oceanic Sciences (TAO) publishes bi-monthly scientific research articles, notes, correspondences and reviews in all disciplines of the Earth sciences. It is the amalgamation of the following journals: Papers in Meteorological Research (published by the Meteorological Society of the ROC) since Vol. 12, No. 2 Bulletin of Geophysics (published by the Institute of Geophysics, National Central University) since No. 27 Acta Oceanographica Taiwanica (published by the Institute of Oceanography, National Taiwan University) since Vol. 42.
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