下雷-东平锰矿带矿床特征和成因探讨  

Characteristics and Genesis of Deposits in the Xialei-Dongping Manganese Ore Belt of Guangxi Province

作　　者：朱建德[1] 朱恺军[2] 周尚国[3] 田郁溟[3] 张之武[3] 李升福[4] 施春华[2] 

机构地区：[1]鲁东大学,山东烟台2624025 [2]浙江农林大学,浙江杭州311300 [3]中国冶金地质总局,北京100025 [4]中国冶金地质总局广西地质勘查院,广西南宁530022

出　　处：《地质与勘探》2016年第5期846-853,共8页Geology and Exploration

基　　金：国家科技支撑计划课题(2011BAB04B10);国家自然科学基金项目(41372097);南京大学国家金属矿产开放实验室项目资助

摘　　要：下雷-东平锰矿带是我国重要的锰矿矿集区。在矿集区典型锰矿床的野外工作基础上,对含锰岩系和矿石开展了岩石学、岩石化学、微量元素地球化学分析研究,比较了同一锰矿带的下雷式、东平式两类锰矿床特征。结合前人区域构造资料,探讨了下雷式、东平式两类锰矿成因。研究认为下雷式锰矿形成于被动大陆边缘,热水作用参与了锰矿的形成;而东平式锰矿形成于被动大陆边缘向前陆盆地过渡带,成矿过程中火山活动强烈,推测东平锰矿的沉淀富集作用与海底火山喷发具有一定的相关性。The Xialei- Dongping manganese ore belt is an important ore concentration area in China. Based on field work on the typical Mndeposits,we have conducted research on petrological characteristics,major element content,and trace element content of ore- bearing formation. We compared the characteristics of Xialei- type manganese deposits and Dongping- type manganese deposits which formed in the same ore- forming belt. Combined with regional tectonic data from previous studies,we explored the genesis of the two types of deposits. Our research suggest that the Xialei- type Mn- deposits formed in a passive continental margin,where hydrothermal activity played an important role in the formation of Mn- deposits,while the Dongping- type Mn- deposits were generated in a transition from a passive continental margin to a foreland basin where volcanic activity was intensive. We infer that the formation of the Dongping- type Mn- deposits was related to volcanic eruptions at the seafloor.

关 键 词：下雷-东平锰矿带 锰矿类型 矿床特征 成因探讨 

分 类 号：P618.32[天文地球—矿床学]