| 保靖葫芦磷矿床地质特征及矿床成因 |
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| 引用本文： | 刘金山.保靖葫芦磷矿床地质特征及矿床成因[J].湖南地质,1991,10(1):33-38,67. |
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| 作者姓名： | 刘金山 |
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| 作者单位： | 湖南省地质矿产局四○五队 |
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| 摘 要： | 葫芦磷矿床位于古丈背斜南西端,含磷岩系赋存于震旦系陡山沱组下部,总厚度10m、分为A—B—C—D—E—F沉积序列。矿体呈层状,产状稳定,平均厚1m。P_2O_5平均品位氧化矿石为27％;原生矿石为20％,主要由胶磷矿(氟磷灰石)和隐晶石英、以及有机碳和黄铁矿组成。磷矿形成于陆棚至陆坡的静水环境。成矿物质来自海底岩石溶解、地壳深部、海底火山和海洋生物的磷质,它们在盆地中浓缩,在化学和生物化学作用下,磷质局部富集、沉淀成矿。矿床被认为是化学和生物化学沉积成因。
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| 关 键 词： | 磷矿 矿床 地质特征 矿床 成因 |
GEOLOGY AND GENESIS OF HULU PHOSPHORUS DEPOSIT IN BAOJIN COUNTY |
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| Liu Jinshan.GEOLOGY AND GENESIS OF HULU PHOSPHORUS DEPOSIT IN BAOJIN COUNTY[J].Hunan Geology,1991,10(1):33-38,67. |
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| Authors: | Liu Jinshan |
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| Institution: | No.405 Team of Hunan Bureau of Geology & Mineral Resources |
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| Abstract: | Hulu phosphorus deposit is situated in the southwestern end of Guzhang anticline. The phosphorus-bearing rock series lies in the lower part of Doushantuo Formation of Sinian,with a total thickness of 10m,which can be divided into A-B-C-D-E-F sedimentary sequences.The orebodies take stratiform shape, with steady mode of occurrence, the average thickness being 1m. The average P_2O_5 grade is 27% for oxide ore and 20% for primary ore. The ore is mainly composed of collophane (fluorapatite)and cryptocrystalline quartz as well as some organic carbon and pyrite. The phosphorus ore was formed in hydrostatic environments in the shelf to slope. The phosphorus material came from seafloor volcanic activities and oceanic organisms, concentrated in the basin, become local enrichment and precipitated to form ore in the light of chemical and biochemical processes. The deposit is considered to be of chemical and biochemical sedimentary origin. |
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| Keywords: | Doushantuo Formation phosphorus ore Sedimentary environment Chemical and biochemical process |
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