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Author:
Journal / Book Title:
Year:
Volume:
Issue:
di zuo yan jian jie
Author(s):
LU Fengxiang
Pages:
57
-
63+43
Year:
1980
Issue:
2
Journal:
Journal of East China Institute of Technology
Keyword:
橄榄石
;
尖晶石二辉橄榄岩
;
玄武岩浆
;
地壳厚度
;
二辉橄榄岩包体
;
碱性玄武岩
;
碱性橄榄玄武岩
;
斜方辉石
;
橄榄拉斑玄武岩
;
海洋地壳
;
Abstract:
<正> 地球为一不均匀的球体,具有层圈构造,层与层之间的界线各地区不完全一致,因而不同的学者所提出的模式也不尽相同,大体可采用下列剖面: 地壳厚度在各地变化较大,我国地壳的厚度据1965年发表的资料为; 海洋地壳的厚度较小,太平洋与印度洋地壳平均厚度为13KM,大西洋的地壳厚度在10—14KM。在地壳莫氏面以下分布有厚度为2800KM的地幔层(Mantle),它组成了地球全部质量的67.2%,而地壳、水圈、大气圈只占地球重量的0.5%。近廿多年来人们对地球的研
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