文章摘要
宋小军,曾道国,蔡健龙,杨胜波,蔡国盛,薛洪富,曾凡祥,宫学智,付桥林,任才云,杨凌.贵州英坪磷矿Ⅱ号矿体地质特征及控矿因素[J].矿产勘查,2020,11(1):136-149
贵州英坪磷矿Ⅱ号矿体地质特征及控矿因素
Geological characteristics and ore-controlling factors of No. Ⅱ ore body of Yingping phosphate deposit, Guizhou Province
投稿时间:2019-06-12  
DOI:
中文关键词: 磷矿  地质特征  控矿因素  矿产勘查工程  英坪  贵州
英文关键词: Phosphate deposit, geological characteristics, ore-controlling factors,mineral exploration engineering,Yingping,Guizhou Province
基金项目:国家自然科学基金项目(编号:U1812402)资助。
作者单位
宋小军 贵州省有色金属和核工业地质勘查局地质矿产勘查院, 贵阳 550005 
曾道国 贵州省有色金属和核工业地质勘查局地质矿产勘查院, 贵阳 550005 
蔡健龙 瓮福集团有限责任公司, 贵阳 550005 
杨胜波 瓮福集团有限责任公司, 贵阳 550005 
蔡国盛 贵州省有色金属和核工业地质勘查局地质矿产勘查院, 贵阳 550005 
薛洪富 贵州省有色金属和核工业地质勘查局地质矿产勘查院, 贵阳 550005 
曾凡祥 贵州省有色金属和核工业地质勘查局地质矿产勘查院, 贵阳 550005 
宫学智 贵州省有色金属和核工业地质勘查局地质矿产勘查院, 贵阳 550005 
付桥林 贵州省有色金属和核工业地质勘查局地质矿产勘查院, 贵阳 550005 
任才云 瓮福集团有限责任公司, 贵阳 550005 
杨凌 瓮福集团有限责任公司, 贵阳 550005 
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中文摘要:
      英坪磷矿位于黔中地区瓮福矿田内,为大型海相生物化学沉积磷块岩矿床。通过前后两次勘查工作,区内发现磷矿体仅b矿层具有工业价值,在此之下的a矿层以及之上的Zb-p含磷标志层均不具工业价值;也证实了Ⅱ号矿体为区内主矿体,单矿体资源量已超亿吨,占比97%。Ⅱ号矿体厚度具有相对集中(稳定)、厚大(厚层)的特点;P2O5含量相对稳定,变化幅度小,具有均匀的特点;受破矿断层的影响,矿体在横向上叠瓦状排列而重复,在走向上错列而断开。矿石自然类型有致密状、团块状及砂砾状磷块岩;矿石结构有凝胶(胶状)结构、砂屑结构及砾屑(粒屑)结构;矿石构造有块状构造、层纹状构造、条带状构造及团块状构造。通过英坪磷矿控矿因素分析认为,早震旦世—早寒武世含磷岩系的沉积演化是形成海相同生沉积磷块岩矿床的先决条件;黔中古构造运动形成了区域上由西向东依次为古陆—滨岸—浅海—深海的古地理格局;黔中古陆的沉积环境及岩相直接控制了磷矿床的形成和分布;干燥、炎热的古气候是磷质聚集、浓缩与富集的必要条件。
英文摘要:
      Yingping phosphate deposit is located in the Wengfu Minefield in the central Guizhou Province and is a large marine biochemical sedimentary phosphorus rock deposit. Through the two explorations before and after, it is found that the phosphate ore body only has the industrial value of the b-mine layer, and the a-mine layer below and the Zb-p phosphorus-containing mark layer above it have no industrial value; It is also confirmed that the No. Ⅱ ore body is the main ore body in the area, and the single ore body resources have exceeded 100 million tons, accounting for 97%. The thickness of the No. II ore body is relatively concentrated (stable) and thick (thick layer); the P2O5 content is relatively stable, the variation range is small, and it has uniform to extremely uniform characteristics; Affected by destroying ore body fault, the ore bodies are arranged in a horizontal arrangement in a horizontal direction, and are staggered in the direction of the ore. The natural types of ore are dense phosphorus rock, agglomerate phosphorite and gravel-like phosphorite; The ore structure has a gel (gummy) structure, a sand cuttings structure and a gravel (granules) structure; the ore structure has a block structure, a layered structure, a strip structure and a massive structure. According to the analysis of ore-controlling factors of Yingping phosphate deposit, the sedimentary evolution of the phosphorus-bearing rock series during the Early Sinian to Early Cambrian period is a prerequisite for the formation of the same sedimentary phosphorus rock deposits in the sea; Paleostructural movement in the central Guizhou Province formed an ancient geography pattern from the west to the east in the order of the ancient land-shoreshore-shallow sea-deep sea; Ancient land in the central Guizhou Province of sedimentary environment and lithofacies control the formation and distribution of phosphate deposits; The dry, hot paleoclimate is a necessary condition for phosphorus accumulation, concentration and enrichment.
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