四川马边老河坝磷矿区成矿地质条件分析  

Analysis of Ore-Forming Geological Conditions of the Laoheba Phosphate Deposit,in Mabian,Sichuan

作　　者：刘俊男 胡明[1] LIU Jun-nan;HU Ming(College of Earth Sciences and Technology,Southwest Petroleum University,Chengdu 610500)

机构地区：[1]西南石油大学地球科学与技术学院,成都610500

出　　处：《四川地质学报》2020年第4期614-619,共6页Acta Geologica Sichuan

摘　　要：马边县位于四川盆地西南边缘,同属小凉山区和乌蒙山区,是国家级贫困县,重点扶贫开发县。区内磷矿资源丰富,具有较大的经济价值和社会价值。区内磷矿赋于早寒武世梅树村早期麦地坪组,为沉积性矿床,生物聚磷作用是马边地区磷矿形成的最重要因素,潮下间歇高能带中生物聚磷作用最为强烈,是最有利于形成磷矿的相带。本文在总结前人科研成果和勘探评价成果的基础上,通过分析古构造、古地理环境以及沉积相条件,探究并分析马边磷矿成矿地质条件,为下一步扩大找矿提供地质依据。Mabian Yi Autonomous County is rich in phosphate resources.Phosphate deposits occur in the Lower Cambrian Maidiping Formation,being a sedimentary one.Biophosphorization is the most important ore-forming factor of the Mabian phosphate deposits.Biophosphorization was the strongest in subtidal intermittent high energy zone which was the most favorable facies zone for the formation of phosphate.This paper has a discussion on geological conditions for the formation of the Laoheba phosphate deposit according to paleostructure,paleogeographic environment and sedimentary facies conditions.

关 键 词：老河坝磷矿 磷矿成因 古构造 古地理 沉积环境 

分 类 号：P619.21[天文地球—矿床学]