黔东杨立掌——道坨南华纪“大塘坡”式含锰盆地地质分析及找矿预测
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摘要
根据杨立掌—道坨地区沉积锰的矿体厚度、品位数据资料,分析了含锰盆地展布及岩性组合特征,认为黔东杨立掌—道坨南华纪"大塘坡"式含锰盆地受古断层控制,沿65°方向展布,盆地延伸长15.0km,宽2~2.5km,规模巨大;含锰盆地由4个岩性带组成,从中心向外依次为:块状、气泡状菱锰矿夹碳质页岩带;碳质页岩夹块状、条带状菱锰矿带;碳质页岩夹条带状、层纹状菱锰矿带;碳质页岩、含锰碳质页岩、含锰白云岩带。根据含锰盆地岩性组合分带及其展布特征,预测含锰盆地中心中段高地一带具较好的找矿远景。
On basis of thickness of sedimentary Mn ore bodies and grade is analyzed distribution and lithologic assemblages of the Datangpo style Mn-bearing basin.The basin is large in size,15.0km long extending in direction 65°,2~2.5km controlled by ancient fault.There are four lithological assemblages that outward from center is massive and bubble-like zone of rhodochrosite layer with intercalation of carbonaceous shale,carbonaceous shale zone with intercalation of massive and banded rhodochrosite layer,carbonaceous shale zone with intercalation of banded and laminae rhodochrosite layer and carbonaceous shale-Mn-bearing carbonaceous shale-Mn-bearing dolomite zone.According to the above mentioned we predict that the high land at part of the central area in the basin is potential for ore prospecting.
On basis of thickness of sedimentary Mn ore bodies and grade is analyzed distribution and lithologic assemblages of the Datangpo style Mn-bearing basin.The basin is large in size,15.0km long extending in direction 65°,2~2.5km controlled by ancient fault.There are four lithological assemblages that outward from center is massive and bubble-like zone of rhodochrosite layer with intercalation of carbonaceous shale,carbonaceous shale zone with intercalation of massive and banded rhodochrosite layer,carbonaceous shale zone with intercalation of banded and laminae rhodochrosite layer and carbonaceous shale-Mn-bearing carbonaceous shale-Mn-bearing dolomite zone.According to the above mentioned we predict that the high land at part of the central area in the basin is potential for ore prospecting.
引文
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(1)温官国,王佳武,吴桂武,等.贵州省松桃县李家湾锰矿详查报告.贵州省地矿局103地质大队,2013.
(2)安正泽,张仁彪,陈甲才,等.贵州省松桃县道坨锰矿详查报告.贵州省地矿局103地质大队,2014.
[2]周琦,杜远生,颜佳新,等.贵州松桃大塘坡地区南华纪早期冷泉碳酸盐岩地质地球化学特征[J].地球科学:中国地质大学学报,2007,32(6):845-852.
[3]王剑.华南新元古裂谷盆地沉积演化:兼论与Rodinia解体的关系[D].成都:成都理工学院,1999:1-146.
[4]王剑,刘宝珺,潘桂棠.华南新元古代裂谷盆地演化:Rodinia超大陆解体的前奏[J].矿物岩石,2001,21(3):135-145.
[5]王剑.华南“南华系”研究新进展:论南华系地层划分与对比[J].地质通报,2005,24(6):491-495.
[6]周琦.黔东新元古代南华纪早期冷泉碳酸盐岩地质地球化学特征及其对锰矿的控矿意义[D].武汉:中国地质大学(武汉),2008.
[7]周琦,杜远生.古天然气渗漏与锰矿成矿:以黔东地区南华纪“大塘坡式”锰矿为例[M].北京:地质出版社,2012.
[8]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.
[9]覃英,安正泽,王佳武,等.贵州松桃锰矿整装勘查区道坨隐伏超大型锰矿床的发现及地质特征[J].矿产勘查,2013,4(4):345-355.
[10]安正泽,张仁彪,陈甲才,等.贵州省松桃县道坨隐伏超大型锰矿床的发现及其成因探讨[J].矿床地质,2014,33(4):870-884.
(1)温官国,王佳武,吴桂武,等.贵州省松桃县李家湾锰矿详查报告.贵州省地矿局103地质大队,2013.
(2)安正泽,张仁彪,陈甲才,等.贵州省松桃县道坨锰矿详查报告.贵州省地矿局103地质大队,2014.