| 鞍本抚顺地区科马提岩的初步研究 |
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| 引用本文： | 徐光荣,陈洪江.鞍本抚顺地区科马提岩的初步研究[J].地球化学,1981(4):343-355. |
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| 作者姓名： | 徐光荣 陈洪江 |
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| 作者单位： | 长春冶金地质学校
(徐光荣)，长春冶金地质学校(陈洪江) |
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| 摘 要： | Komatiites have been discovered for the first time in the Lower Anshan Group with a metamorphic grade from amphibolite to granulite facies. Komatiites occur as bedded ultramafic volcanic rocks on the ocean-floor. The kematiites in the Region occurring in the metamorphic rocks are some monomineralic rocks such as hornblendite, monoclinie augitite and hypersthenite. Local komatiites are found retaining some typical pre-existing structures and textures of volcanic rocks, such as blastophitie texture and blastospinifex. The chemical composition of komatiites in this region is much similar to that of other well-known model komatiites in the world, and so are their geochemical charaeteristies. The occurrence of komatiites in the Anshan-Benxi-Fusun Region provide strong evidence to show that this region is an Archean greenstonc belt. Studies on komatiites in this region will shed much light on the stratigraphic division of the Anshan Groupand the paleostructure of the greenstone belt as well as on the rules governing metallogenesis in the Anshan-Benxi-Fusun Region.
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| 关 键 词： | 科马提岩 变质岩 岩石化学 地球化学 |
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