| 陕西凤太泥盆纪盆地东缘发现古老结晶基底 |
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| 引用本文： | 校培喜,王洪亮.陕西凤太泥盆纪盆地东缘发现古老结晶基底[J].西北地质科学,1999,20(1):4-9. |
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| 作者姓名： | 校培喜 王洪亮 |
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| 作者单位： | 中国地质科学院西安地质矿产研究所!西安７１００５４(校培喜，张俊雅)，陕西地质矿产勘查开发局区域地质矿产研究院!咸阳７１２０００(王洪亮) |
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| 摘 要： | 通过岩石学、同位素年代学、变形变质特征的研究及区域对比，认为凤太泥盆纪盆地东缘（黄柏原一带）原划泥盆纪地层应为新太古代－古元古代变质结晶基底，变质达角闪岩相，其可能是佛坪穹隆构造向西北延伸，进一步证明了泥盆纪时西部凤太盆地和东部山（阳）柞（水）镇（安）盆地是两个独立盆地，中间被佛坪穹隆隔挡。该项成果对研究南秦岭地壳演化和指导凤太地区的地质找矿意义重大。
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| 关 键 词： | 凤太地区 古老结晶基底 隆滑构造 |
DISCOVERY OF THE ANCIENT CRYSTALLIZATION BASEMENT IN EASTERN MARGIN OF THE DEVONIAN FENGXIAN-TAIBAI BASIN,SHAANXI |
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| Xiao Peixi and Zhang Junya.DISCOVERY OF THE ANCIENT CRYSTALLIZATION BASEMENT IN EASTERN MARGIN OF THE DEVONIAN FENGXIAN-TAIBAI BASIN,SHAANXI[J].Northwest Geoscience,1999,20(1):4-9. |
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| Authors: | Xiao Peixi and Zhang Junya |
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| Abstract: | ccording to the petrography, isotopic chronology and features of deformation andmetamorphism as well as regional correlation, it is considered that the Devonian strata ofeastern margin (Huangbaiyuan area) of Devonian Fengxian-Taibai basin should belong to themetamorphic crystallization basement of New Archean-Suberathem and that the metamorphicgrade reaches to amphibolite facies. The crystallization basement should be thenorthwestwards extension of the quaquaversal structure in Foping, thus the western Fengxian-Taibaibasin and eastern Shanyang-Zhashui one during Devonian Period are tow isolated basins cutoff by Foping quaquaversal structure. The research result will exert an active influence onthe study of crustal evolution of southern Qinling and on the geological ore-hunting inFengxian-Taibai area. |
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| Keywords: | Fengxian and Taibai area Ancient crystallization basement Quaquarersal structure |
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