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海底多金属结核贮量巨大,是重要的潜在矿产资源.对多金属结核与海底火山热液活动之间的关系早有报道,如火山碎屑常常做为结核的核心物质存在,海底热液活动正在排放大量的锰等成矿物质,并沉淀形成铁锰氧化物.然而由于缺乏有效的研究手段和方法,对海底火山热液活动在结核成矿作用中的地位迄今还不清楚.而这一问题的解决不仅对结核的成因具有重要的理论意义,而且对于研究掌握结核的分布规律,进一步寻找圈定富矿结核具有重大的现实意义.深部海水中~3He是一种稳定的来自地幔的物质,它可以在海洋中保存上千年,随海流漂移数千公里,而且不受物理化学条件的影响,因此海洋中~3He/~4He比值是探测海底热液活动最灵敏的指示剂. 本文根据太平洋中部多金属结核的氦同位素组成和分布规律探讨了多金属结核与海底热液活动的关系.
Seabed polymetallic nodules huge reserves, is an important potential mineral resources.Relationship between polymetallic nodules and submarine volcanic hydrothermal activity has long been reported, such as volcaniclastic debris often as the core of the existence of tuberculosis, seafloor hydrothermal activity A large amount of ore-forming substances such as manganese are being discharged and precipitated to form Fe-Mn oxides, however, due to the lack of effective research methods and methods, the status of submarine volcanic hydrothermal activities in the mineralization of TB has not yet been clarified The solution of the problem not only has important theoretical significance for the cause of tuberculosis, but also has great practical significance for studying the distribution rule of tuberculosis and further searching for the delineation of rich ore nodules. The ~ 3He in the deep sea water is a stable material derived from the mantle Therefore, the ~ 3He / ~ 4He ratio in the ocean is the most sensitive indicator for the detection of seafloor hydrothermal activity.According to the fact that the central part of the Pacific Ocean The composition and distribution of helium isotopes of metal nodules The relationship between polymetallic nodules and seafloor hydrothermal activity is discussed.