| 秦岭地区磷矿地质特征 |
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| 引用本文： | 涂怀奎.秦岭地区磷矿地质特征[J].化工矿产地质,1994(1). |
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| 作者姓名： | 涂怀奎 |
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| 作者单位： | 西北地质勘探局２１４大队 |
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| 摘 要： | 根据大地构造单元及地质背景条件与磷矿特征,秦岭地区划分４个成磷区,即华北、秦岭、扬子与摩天岭区。磷矿主要形成于晚震旦世和早寒武世。其间发育着不同岩石,构成各种类型矿石。磷矿的形成与陆源物质、有机质及铀矿关系密切。磷矿层处于“继承陆源碎屑”建造或“造海蒸发岩碳酸盐”建造中,特别是两种建造过渡带。矿床形成在地壳比较平静时期与造海运动关系密切。在扬子区北缘磷矿床通常赋存于“古地形高地”或“水下隆起”周围,常呈带状。扬子地台区北缘（摩天岭区）比华北地台南缘对子磷矿床形成更为有利。
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| 关 键 词： | 秦岭 磷矿分区 成矿条件 |
GEOLOGICAL CHARACTERISTICS OF THE PHOSPHATE DEPOSITS IN QINLIN REGION |
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| Abstract: | AbstractIn accordance with tectonic system, geological setting and phosphogenetic characters,the Qinling region may be grouped into four ohosphogenetic zones: North China, Yangtze, South Qinling and Motianling. The phosphogenesis found a major favor in the periods of Late Sinian and Early Cambrain when different typies of phophate rocks as well as a great variety of host rocks developed. The former development had a close link with influx of terrigenous materials and organic matters ,usually companying uranium mineralization. The phosphorite beds were fromed in "inherited terrigenous elastic formation" and "seamaking evaPOrative carbonate formation ", particularly along their transitional region. On the other hand, less crustal movements coupled with seamaking activities also helped phosphate mineralization. In terms of palaeogeographic control, the places around "palaeotopographic highs" and "submerged lifts" provided more ideal sites to phosphogenesis,and the northern margin of the Yangtze platform (Motianling zone)was more favorable for mineralization than the southern margin of North China platform. |
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