摘要
下院子锰矿产于南华系下统大塘坡组第一段下部,冷水溪犁式正断层(F1)的上盘,矿体呈层状、似层状缓倾斜顺层产出。文章通过对下院子锰矿系统的研究,对本区锰矿提出以下找矿标志:地层标志(大塘坡一段碳质页岩);含锰岩系厚度标志(>17 m);沉积相标志(成锰盆地);两界河组的厚度和岩性组合关系(厚度大,岩性组合复杂);构造标志(古断裂);地化标志(Mn/Cr≈40)。
Xiayuanzi manganese ore occurs in the first section of the Datangpo group under Nanhua system,hanging wall of lengshuixi F1 plow normal fault,the orebody occurs in the stratified or stratoid shape.Based on the study of Xiayuanzi manganese ore system,this paper put forward the following prospecting indicators:stratigraphic mark(shale in the first section of the Datangpo group;Mn Rock series thickness mark(>17 m);sedimentary facies mark(Manganese Basin);thickness and lithology combination between the two groups(border thickness,lithology complex);structure marks(paleo-fault);localization signs(Mn/Cr = 40).
引文
[1]张遂,周琦,张平壹,等.黔东松桃西溪堡南华系大塘坡组超大型锰矿床地质特征与找矿预测[J].地质科技情报,2015,(6):8-16.
[2]谢小峰,温官国,袁良军.黔东地区李家湾锰矿矿床地质特征及综合找矿信息[J].化工矿产地质,2015,37(1):1-6.
[3]侯兵德,谢兴友,张太富,等.贵州西溪堡锰矿地质特征及深部找矿预测[J].矿产勘查,2013,4(1):43-51.
[4]袁良军,周琦,杜光映,等.贵州松桃西溪堡大型锰矿床F1犁式断层特征及对锰矿体破坏与保存作用探讨[J].贵州地质,2013,30(3):170-176.
[5]周琦,杜远生,覃英.古天然气渗漏沉积型锰矿床成矿系统与成矿模式——以黔湘渝毗邻区南华纪“大塘坡式”锰矿为例[J].矿床地质,2013,32(3):457-466.