西太平洋雅浦海沟区海底热流原位测量

发布时间：2018-01-09 08:21

  本文关键词：西太平洋雅浦海沟区海底热流原位测量　出处：《海洋地质与第四纪地质》2016年04期 　论文类型：期刊论文

  更多相关文章： 雅浦海沟 热流探针 热流值 西太平洋

【摘要】：为了解西太平洋雅浦海沟区俯冲带及岛弧两侧的海底热流分布情况,2015年1—3月期间的西太平洋海山航次中,"科学"号利用最新一代Lister型热流探针对该区域开展了海底热流原位测量工作。沿着横跨俯冲带的站位测线,本次进行了10个热流站位测量,共获得8个站位的有效数据。测量结果表明,该地区地温梯度的变化范围为0.011~0.137Km-1,平均0.089Km-1,热导率的变化范围为0.58~1.32 Wm-1 K-1,热流值则在14.4~118.85mWm-2之间,平均为68.02mWm-2。热流值分布显示,雅浦岛弧附近具有较高的热流值,自雅浦岛弧向两侧热流值逐渐降低,低热流区主要分布在帕里西维拉海盆。由于该地区热流测量数据依然稀缺,深入的讨论有待进一步研究。
[Abstract]:In order to understand the distribution of undersea heat flow along the subduction zone and the two sides of the island arc in the Yapu trench area of the western Pacific Ocean, the seamount voyage in the western Pacific Ocean during the period from January to March in 2015 was carried out. Using the latest generation of Lister heat flux probe, Science has carried out in situ measurement of submarine heat flux in this area. Along the line of station position measurement across the subduction zone, 10 heat flow station measurements have been carried out this time. The effective data of 8 stations were obtained. The results show that the variation range of geothermal gradient in this area is 0.011 ~ 0.137 km ~ (-1), with an average of 0.089 Km ~ (-1). The variation range of thermal conductivity is 0.58 ~ 1.32 Wm-1 / K ~ (-1), and the heat flux is between 14.4C and 118.85mW ~ (-2). The average heat flux is 68.02mWm-2.The heat flux distribution shows that there is a higher heat flux near the Yapu island arc, and the heat flux decreases gradually from the Yapu island arc to the two sides. The low heat flux region is mainly distributed in the Palisevera basin. Since the heat flux measurement data in this area are still scarce, further discussion is needed.
【作者单位】： 中国科学院海洋研究所海洋地质与环境重点实验室;
【基金】：中国科学院战略性先导科技专项(Y3A311101T) 国家自然科学青年基金(41406061)项目
【分类号】：P736
【正文快照】： 海底热流测量是研究海底构造活动的一种重要的地球物理方法,获得的热流值是研究大洋地壳和上地幔岩石圈热状态的重要指标[1]。早期由于受探测设备的限制,热流数据来源主要是通过大洋钻探[2-3]和陆架区的油气钻井[4-5]获得。随着热流探测技术进步,人们开始使用探针式热流计直接，

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