| 中国东部地幔岩包体的产出及其与地球内部构造的关系 |
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| 引用本文： | 曹荣龙,朱寿华.中国东部地幔岩包体的产出及其与地球内部构造的关系[J].地球物理学报,1983,26(2):158-167. |
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| 作者姓名： | 曹荣龙 朱寿华 |
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| 作者单位： | 中国科学院地球化学研究所 |
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| 摘 要： | 中国东部橄榄岩和榴辉岩深源包体的地理分布构成了全球环太平洋深源包体分布带的重要组成部分。深源包体的产出与地球内部构造密切相关。尖晶石橄榄岩和镁铝榴石橄榄岩两种包体与上地幔的构造分带相一致,榴辉岩包体代表上地幔中局部的分凝体。碱性玄武岩浆的活动和深源岩石带的形成应为板块构造运动的结果。
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| 关 键 词： | 榴辉岩 地幔岩包体 镁铝榴石 深源岩石 地球内部构造 碱性玄武岩浆 尖晶石二辉橄榄岩包体 深源包体 上地幔 中国东部 |
| 收稿时间： | 1981-02-17 |
CORRELATION OF MANTLE XENOLITH OCCURRENCES WITH EARTH'S INTERNAL ZONING AND TECTONIC IN EASTERN CHINA |
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| Cao Rong-long Zhu Shou-hua.CORRELATION OF MANTLE XENOLITH OCCURRENCES WITH EARTH'S INTERNAL ZONING AND TECTONIC IN EASTERN CHINA[J].Chinese Journal of Geophysics,1983,26(2):158-167. |
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| Authors: | Cao Rong-long Zhu Shou-hua |
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| Institution: | Institute of Geochemistry Academia Sinica |
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| Abstract: | There are more than 30 confirmed localities of peridotite and eclogite xenolith-bear-ing alkali basalts along eastern Chinese Continental margin. The geographical distribution of mantle nodules is an important part of circum-Pacific deep seated rock belt.The occurrences of xenoliths can be, summarized as follows:1. Spinel lherzolite xenoliths in alkali basalt lava and pyroclastic tuff or conglomerate.2. Garnet Iherzolite xenoliths in ultra-alkali nephelinite （limburgite） lava and related pyroclastic welding breccia.3. Eclogite xenoliths in hypabyssal basaltic breccia pipes with various kinds of peridotite nodules.Different rock types occurring as ejecta along Chinese Continental margin can be arranged according to the depths of the supposed source regions. The spinel Iherzolite may represent the first zone of upper mantle beneath Moho in the depth ranging from 35 to 70 km. The garnet Iherzolite may be the second zone of upper mantle in the depth about 70-150 km. The eclogite may represent local aggregate within the mantle peridotites.It is suggested that the xenolith-bearing basalts originated as a result of subduc-tion of Pacific plate under Chinese Continent. However, some localities of xenoliths in southern China and inner mainland of northern China might be controlled by more deep factors as in the sea mount xenolithbearing alkali basalts. |
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