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华北一些新生代玄武岩及其包体的氧同位素初步研究 预览 被引量:2

OXYGEN ISOTOPE COMPOSITION IN SOME CENOZOIC BASALTS AND INCLUSIONS FROM NORTH CHINA
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摘要 华北新生代玄武岩氧同位素组成δ~(18)O值为5.2~7‰,属幔源成因。拉斑玄武岩和碱性橄榄玄武岩的氧同位素组成不同,表明其岩浆源有差别。包体中斜方辉石和单斜辉石的δ~(18)O值很接近,表明它们处于平衡状态,根据平衡体系中的橄榄石和单斜辉石的δ~(18)O值计算出它们平衡时的温度为1049~1167℃。 This paper deals with some characteristics of oxygen isotope of Cenozoic basalts and inclusions. All these samples were collected from North China, such as Datong alkaline basalts (Quarternary) and tholeiites(Quarternary), Wuan alkaline basalts(Neogene), Xiyang alkaline basalts (Neogene), Zhangbei alkaline basalts and tholeiites (Neogene), Fanshi alkaline basalts and tholeiites (Paleogene), Beijing alkaline basalts and tholeiites(Paleogene). The oxygen isotope characteristics of these Cenozoic basalts and inclusions of this area are as follows:(1)The range of δ~(18)O values of basalts is from 5‰ to 7.58‰, which means the origin of basalts is upper mantle; (2) The mean δ~(18)O values of alkaline basalts(δ~(18)O) are slightly higher than those of tholeiites (δ~(18)0), despite the different period, e.g. the values of (?)_Al ~(18)O and (?)_Th ~(18)O in Quarternary basalts are 5.63‰ and 5.56‰, respectively; the values of (?)_Al ~(18)O and (?)_Th ~(18)O in Neogene basalts are 6.90‰ and 6.13‰; the values of (?)_Al ~(18)O and (?)_Th ~(18)O in Paleogene basalts are 5.80‰ and 5.62‰. However, even at the same area, the values of (?)_Al ~(18)O are also slightly higher than (?)_Th ~(18)O values; (3)From the δ~(18)O values of olivine and clinopyroxene in isotope equilibrium system, the equilibrium temperature (1049~1167℃) can be calculated, which is very similar to the temperature(950~1160℃) calculated from chemical composition of minerals.
作者 严正 刘若新 杨美娥 Yah Zheng, Liu Ruoxin and Yang Mei'e(Institute of Geology, State Seismological Bureau, Beijing, 100029)
出处 《岩石学报》 SCIE CAS CSCD 北大核心 1993年第2期 205-209,共5页 Acta Petrologica Sinica
基金 国家地震局基金
关键词 氧同位素 玄武岩 捕虏体 矿物包体 Oxygen isotope Basalt Inclusion
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参考文献10

  • 1刘若新,中国新生代火山岩年代学与地球化学,1992年 被引量:1
  • 2郑淑蕙,稳定同位素地球化学分析,1986年 被引量:1
  • 3刘若新,岩石学报,1985年,1卷,4期,24页 被引量:1
  • 4严正,石油实验地质,1984年,6卷,3期,253页 被引量:1
  • 5刘若新,Geochemistry,1983年,2卷,1期,17页 被引量:1
  • 6严正,地质科学,1983年,4期,387页 被引量:1
  • 7周新华,Earth Planet Sci Lett,1982年,58卷,3期,301页 被引量:1
  • 8刘若新,地震地质,1981年,3卷,3期,1页 被引量:1
  • 9严正,科学通报,1981年,26卷,14期,878页 被引量:1
  • 10严正,地震地质,1980年,2卷,4期,68页 被引量:1

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