赤道东太平洋海隆水体悬浮颗粒硫化物及其对海底热液活动的指示Study of Suspended Particulate Sulfides in the Eastern Pacific Rise Area and Their Connection with Sefloor Hydrothermal Activities
安成龙,范德江,孙晓霞,杨作升
摘要(Abstract):
基于2011年大洋一号第22次环球考察在东太平洋热液活动区采集的5个站位的77个悬浮体样品,利用扫描电镜与能谱分析相结合的方法,对悬浮颗粒硫化物颗粒的矿物形貌和物相、矿物组合特征以及空间分布进行了系统的研究,探讨了悬浮颗粒矿物组成对海底热液活动的指示作用。研究区出现了闪锌矿、纤锌矿、黄铁矿、白铁矿、磁黄铁矿、黄铜矿、方黄铜矿、铜蓝以及单质硫等多种硫化物颗粒,主要的硫化物矿物包括黄铁矿—闪锌矿—黄铜矿—磁黄铁矿,据此推断该区海底热液属于典型的高温热液流体,其温度在350℃以上。研究区不同站位间悬浮体丰度和保存程度差异明显,这与距离热液活动点远近有着较好的关系。
关键词(KeyWords): 东太平洋;悬浮体;硫化物;热液活动
基金项目(Foundation): 国际海域资源调查与开发“十二五”项目(DY125-11-R-04)资助
作者(Author): 安成龙,范德江,孙晓霞,杨作升
DOI: 10.16441/j.cnki.hdxb.2014.01.013
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