摘要
本文通过对中国东部新生代玄武岩包体矿物橄榄石、斜方辉石和单斜辉石穆斯堡尔谱测定,发现Fe<sup>2+</sup>在橄榄石中两种不同结构位置M<sub>1</sub>和M<sub>2</sub>上的分布与橄榄石平衡结晶温度密切相关,对此本文作了合理的解释。本文还用次近邻效应解释了斜方辉石M<sub>2</sub>位置Fe<sup>2+</sup>穆斯堡尔谱的分裂,认为这应该是斜方辉石M<sub>1</sub>位置上Fe<sup>3+</sup>和四面体位置上Al<sup>3+</sup>所共同作用的结果。
Through the Mossbauer spectrum analysis of olivine, enstenite and clinopyroxene existing as mineral inclusions in the Cenozoic basalt from eastern China, it was discovered that the distribution of Fe^(2+) in M_1 and M_2, two different structural positions in olivine, was closely related to the equilibrium ctystallization temperature of olivine. This paper presented a proper explanation of the structure, and also explained the splitting of the Mossbauer spectrum of Fe^(2+) in position M_2 of enstenite with the theory of next nearest neighbor effect, which was considered resulting from the joint effect of Fe^(3+) in position M_1 of enstenite and Al^(3+) in the tetrahedron.
出处
《安徽地质》
1993年第2期1-7,共7页
Geology of Anhui
关键词
穆斯堡尔谱
橄榄石
辉石
次近邻效应
Mossbauer spectrum
olivine
pyroxene
next nearest neighbor effect.
