摘要
本文讨论了以元素比值研究玄武岩成分的限制条件及岩浆结晶分异作用对熔体元素比值的影响。笔者认为采用元素比值研究源岩成分时，除了要考虑两元素分配系数及部分熔融程度的差异外，还应考虑部分熔融方式的影响。另外，由于结晶分异作用对元素比值的影响很小，因此该方法很适合于研究玄武岩源岩的不相容元素。最后，本文提出了一种较为实用的逼近玄武岩源岩元素比值的方法。
Discussed in this paper are the constraints on the composition of basalts and the effect ofmagmatic crystallization-differentiation on the element ratios in melts in terms of element ratios.The authors suggest that in the study of the composition of basalt source rocks in terms of elementratios the effect of the style of partial metling should be taken intoconsideration in addition to thedifferences in partition coefficient and partial melting degree between any two elements.Moreover,in view of little effect of crystallization differentation on element ratios,this approach is applicable to incompitable elements in basalt source rocks.Also presented in this paper is an effective approach to calculating the extremely approximate element ratios in basalt source rocks.
出处
《矿物学报》
CAS
CSCD
北大核心
1994年第1期61-67,共7页
Acta Mineralogica Sinica
基金
国家自然科学基金
关键词
元素比值
玄武岩
玄武岩源岩
成分
element ratio
basalt
basalt source rock
composition of source rocks
