摘要
过去认为温度和压力对金刚石的形成起着主要的控制作用,现在研究证实除了温度和压力外,氧逸度在金刚石的形成过程中同样起着不可缺少的作用。本文收集总结了国内外在这方面研究的最新成果,包括上地幔的氧逸度及其测定方法,形成金刚石的碳的来源、金刚石形成时的流体状态、金刚石的最新成因模式、氧逸度与金刚石的保存等等。最后认为岩石圈的底部,即氧化还原状态变化较大的岩石圈—软流圈的结合处是最有利于天然金刚石形成的部位。这一点已被天然金刚石包裹体的研究所证实。
Oxygen fugacity has been proposed to be the important controlling factors in the formation of natural diamond in addition to temperature and pressure. This paper summarizes the latest developments in this aspect which includes the oxygen fugacity in the upper mantle and its measuring methods, and the carbon source of diamond, the new genetic model of diamond, and its preservation. The paper indicates that the lowest part of lithosphere, i. e. the link of lithosphere and asthenosphere, where redox state varies more intensively, is considerably favourable to the formation of natural diamond. This idea is proved by the research on the inclusions of natural diamond .
出处
《地质科技情报》
CAS
CSCD
北大核心
1990年第1期9-15,共7页
Geological Science and Technology Information
