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马里亚纳海槽热液烟囱的显微构造及形成温度研究

, PP. 78-85

Keywords: 马里亚纳海槽,热液烟囱,显微构造,氧同位素温度

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Abstract:

本文通过对马里亚纳海槽海底热液烟囱体试样进行的扫描电镜(SEM)观测和δ18O值测定,研究了以蛋白石为主的中低温热液矿物类型和形成温度.表明纯硅质烟囱的氧同位素温度低于40℃,与黄铁矿、白铁矿和重晶石共生的热液烟囱氧同位素温度接近100℃,反映了马里亚纳海槽海底热液活动的产生条件和性质.

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