黎龙昌,张伟,邹林,周娟娇,刘亮,黎诗宏.四川绵竹地区城墙岩磷矿床地质特征及沉积环境[J].西北地质,2021,54(3):142-154 LI Longchang,ZHANG Wei,ZOU Lin,ZHOU Juanjiao,LIU Liang,LI Shihong.Geological Characteristics and Sedimentary Environment of Chengqiangyan Phosphate Deposit in Mianzhu Area, Sichuan Province[J].Northwestern Geology,2021,54(3):142-154
四川绵竹地区城墙岩磷矿床地质特征及沉积环境
Geological Characteristics and Sedimentary Environment of Chengqiangyan Phosphate Deposit in Mianzhu Area, Sichuan Province
投稿时间:2020-04-05  修订日期:2021-03-07
DOI:10.19751/j.cnki.61-1149/p.2021.03.011
中文关键词:  城墙岩磷矿床;什邡式磷;地质特征;沉积环境;四川
英文关键词:Chengqiangyan phosphate deposit;Shifang-type phosphorus deposit;geological characteristics;sedimentary environment;Sichuan province
基金项目:中国地调局项目“川滇黔相邻区地质矿产调查1∶25万绵阳幅”(1212010880704)。
作者单位E-mail
黎龙昌 四川省地质矿产勘查开发局化探队, 四川 德阳 618000
四川省深地地质勘查有限公司, 四川 德阳 618000 
 
张伟 四川省地质矿产勘查开发局化探队, 四川 德阳 618000
四川省深地地质勘查有限公司, 四川 德阳 618000 
 
邹林 四川省地质矿产勘查开发局化探队, 四川 德阳 618000
四川省深地地质勘查有限公司, 四川 德阳 618000 
 
周娟娇 四川省地质矿产勘查开发局化探队, 四川 德阳 618000
四川省深地地质勘查有限公司, 四川 德阳 618000 
 
刘亮 百色市自然资源局, 广西 百色 533000 liuliang2006ziyang@163.com 
黎诗宏 乐山市市中区自然资源局, 四川 乐山 614000  
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中文摘要:
      四川绵竹地区城墙岩磷矿床属著名的“什邡式”磷矿产地之一。赋矿地层为下泥盆统沙窝子组,其中矿体与地层产状基本一致,呈层状、似层状产出,P2O5品位为18.29%~35.57%,品位高低变化与含磷层的厚度具正相关性。其岩相组合为“高岭石黏土岩-铝磷酸盐岩-磷块岩”。矿石自然类型为黏土质或砂砾屑磷块岩矿石,工业类型为硅质及硅酸盐型磷块岩矿石。矿石主要成分相关性和聚类分析表明,P2O5、CaO、F密切相关;Fe2O3和Al2O3、MgO和CO2紧密相关;Fe2O3、Al2O3和RE2O3明显相关。结合区域成矿地质条件分析认为,在早泥盆世,震旦系“绵竹式”磷矿遭受风化剥蚀,矿质搬运至滨浅海沉积形成“什邡式”磷矿床。微量元素特征值指示,城墙岩磷矿床形成于干旱、富氧的边缘海相环境。
英文摘要:
      The chengqiangyan phosphate deposit in Mianzhu area of Sichuan province is one of the famous Shifang-type phosphate deposits. The ore bearing strata are Shawozi Formation of Lower Devonian, and the occurrence of ore body is basically consistent with the stratum, being layered or quasi-bedded. The grade of P2O5 is 18.29%~35.57%, having a positive correlation with the thickness of phosphorus bearing layer. Its lithofacies assemblage is "kaolinite clay rock-aluminophosphate rock-phosphorite rock". The natural type of ore is clayey or sandy gravel phosphorite, and the industrial type is siliceous and silicate phosphorite.The correlation and cluster analysis of main components of ores show that P2O5, CaO and F are closely related; Fe2O3 and Al2O3, MgO and CO2 are also closely related; Fe2O3, Al2O3 and RE2O3 are significantly correlated.Combined with the analysis of regional metallogenic geological conditions,it is held that Sinian Mianzhu type phosphate deposit was weathered and eroded in the early Devonian, and the ore was transported to the coastal shallow sea, forming the Shifang type phosphate deposit.The values of trace elements indicate that the Chengqiangyan phosphate deposit formed in an arid oxygen-rich marginal marine environment.
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