亚洲最大规模隐伏单体富磷矿床羊场磷矿深部找矿突破及其意义  

Breakthrough in deep ore prospecting of Yangchang phosphate deposit,the largest concealed monomer phosphorus-rich deposit in Asia,and its significance

作　　者：杨淑胜 王路 王云晓 米云川 董涛 黄太平[1,2,3,5] 王枫 佘中明 段文婷 YANG Shu-sheng;WANG Lu;WANG Yun-xiao;MI Yun-chuan;DONG Tao;HUANG Tai-ping;WANG Feng;SHE Zhong-ming;DUAN Wen-ting(Yunnan Institute of Geological Survey(Yunnan Institute of Geological Sciences),Kunming 650216,China;Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization,Ministry of Natural Resources,Kunming 650051,China;Yunnan Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization,Kunming 650051,China;Yunnan Geological Survey Foundation Management Center,Kunming 650224,China;Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]云南省地质调查院(云南省地质科学研究院),云南昆明650216 [2]自然资源部三江成矿作用及资源勘查利用重点实验室,云南昆明650051 [3]云南省三江成矿作用及资源勘查利用重点实验室,云南昆明650051 [4]云南省地质勘查基金管理中心,云南昆明650224 [5]昆明理工大学国土资源工程学院,云南昆明650093

出　　处：《岩石矿物学杂志》2024年第5期1073-1085,共13页Acta Petrologica et Mineralogica

基　　金：云南省地质勘查基金项目(D202001,K202101,Y202301,K202301)。

摘　　要：羊场磷矿床位于镇雄县城北西部,地处碗厂镇庆坝村-盐源镇(羊场)蓼叶坝村一带。矿床具有资源储量大、矿石品质优、资源分布集中的特点,为目前亚洲最大规模隐伏单体富磷矿床,位居全球第5位。矿床成因类型为赋存于下寒武统梅树村组(ϵ_(1)ms)的浅海相沉积型磷块岩矿床,矿体呈层状隐伏于羊场背斜,总体上矿体由东往西,矿化有变富趋势。目前,羊场磷矿取得了深部找矿重大突破,揭露3层磷矿体,在祝家厂、冯家沟和庆坝村3个普查区累计探获磷矿石推断资源量Ⅰ+Ⅱ+Ⅲ品级矿石量27.00×10^(8)t,平均厚度36.77 m,P_(2)O_(5)平均品位22.94%,磷矿潜在资源132.0×10^(8)t,有效提升了我国磷矿资源接续能力,实现我国紧缺战略性矿产深部找矿突破,潜在经济价值和社会效益巨大。通过项目成果系统总结早寒武世梅树村期磷矿床的形成机理及富集规律,建立了一套有效的深部磷矿找矿技术体系,有助于进一步完善和丰富早寒武世磷矿的成矿理论,对滇东北地区隐伏磷矿床的勘探和开发具有重要的指导意义。羊场超大型磷矿的发现,实现深部隐伏磷矿找矿技术重大突破,大幅扩大云南省磷矿保有资源量,为加强重要能源矿产资源增储上产、做实做大云南省资源经济、打造千亿级全国重要磷化工产业基地奠定了坚实的资源基础,为维护能源资源安全和粮食安全“国之大者”提供了坚强的资源保障。The Yangchang phosphate deposit in the northwest Zhenxiong County is located at the area of Qingba Village in Wanchang Town to Liaoyeba Village in Yanyuan Town(also called Yangchang).The deposit has the characteristics of large reserves of resources,excellent ore quality and concentrated distribution of resources,and is currently the largest concealed monomeric phosphorus-rich deposit in Asia,ranking fifth in the world.The genetic type of the deposit is the shallow marine sedimentary type phosphorite deposit in the Lower Cambrian Meishucun Formation(ϵ_(1)ms).The ore body is stratified and concealed in the Yangchang anticline.Generally,the ore body develop from east to west,and the mineralization tends to be richer.To date,the Yangchang phosphate deposit has made a major breakthrough in deep mining,revealing 3 layers of phosphorite depositions,and the inferred phos-phorus ore resources of gradeⅠ+Ⅱ+Ⅲhave been discovered in 3 survey areas(Zhujiachang,Fengjiagou and Qingba Village)has a cumulative mineral thickness of 36.77 m and an average P_(2)O_(5)grade of 22.94%.The poten-tial phosphorite resources estimated as 132.0×10^(8)t,which effectively improves the capacity of phosphorus resources in the country,achieves the deep prospecting breakthrough of strategic minerals in short supply in the country,and has huge potential economic value and social benefits.In this paper,the formation mechanism and enrichment of the early Cambrian Meishucun phosphorus deposit is summarized systematically through the prospecting project re-sults,and an effective deep phosphorite prospecting technology is established,which is helpful to further improve the ore-forming theory of early Cambrian phosphorus deposit,and with important guiding significance for the explo-ration and development of concealed phosphorus deposits in northeast Yunnan.The discovery of the super large phosphorus deposit in Yangchang has achieved a major breakthrough in deep concealed phosphorus deposit pros-pecting technology,greatly expanded the amount of p

关 键 词：梅树村组 羊场背斜 隐伏单体富磷矿床 羊场磷矿 云南镇雄 亚洲 

分 类 号：P619.213[天文地球—矿床学]