摘要
北大山位于阿拉善地块中部,巴丹吉林断裂以南的雅布赖—巴音诺尔公晚古生代大陆弧褶皱带,本次测区位于北大山中段。该区的磁法工作很好的揭露岩浆岩之间侵入关系,构造特征及含矿岩体等找矿标志,圈定了找矿靶区;化探异常进一步佐证了磁异常,缩小了找矿靶区;物化探异常为下一步工程验证提供了重要支撑,找矿目标清晰明确,加快了矿区勘查找矿工作,大大缩短了勘查周期。
Beidashan is in the middle of the Alashan block,and in the Late Paleozoic continental arc fold belt of Yabulai-Bayinnuoergong,south of the Badain Jaran fault.The working area is located in the central part of Beidashan area.Survey with magnetic method in the area,gave a good exposed on the relationship of intrusive rocks,structural characteristics,ore-bearing rock body signs,and the ore prospecting target area was finally delineated.The geochemical anomalies had further verified the magnetic anomaly and shrank the prospecting target area.The geophysical and geochemical anomalies could provide important support for the further verification of deep engineering,make the prospecting objectives clear and definite,accelerating the prospecting work in the mining area.
引文
[1]苏巧云,端木合顺.阿拉善右旗库和乌拉石英闪长岩体地球化学特征及其地质意义[J].矿物岩石地球化学通报,2012,31(2):146-151.
[2]王廷印,王士政,王金荣.阿拉善地区古生代陆壳的形成和演化[M].兰州:兰州大学出版社,1994:1-214.
[3]陈毓川,等.中国主要成矿区带矿产资源远景评价[M].北京:地质出版社,1999:1-536.
[4]宫江华,张建新,王宗起,等.阿拉善地块北大山地区两类辉长岩的锆石U-Pb定年、Hf同位素及地球化学特征:对中亚造山带构造演化的启示[J].地质学报,2018,92(7):1369-1388.
[5]郭长林,于宏伟,耿海军,等.内蒙古阿拉善右旗北大山中段铀成矿条件与找矿方向[J].铀矿地质,2016,32(1):1-6.
[6]苏巧云.内蒙古阿拉善右旗努日盖铜金矿地质特征研究[D].西安:西安科技大学,2011:1-47.
[7]周晓江,黄海昆,徐水易,等.内蒙古自治区阿拉善右旗阿日毛都银多金属矿预查报告[R].呼和浩特:内蒙古自治区煤田地质局153勘探队,2018.
[8]管志宁.地磁场与磁力勘查[M].北京:地质出版社,2005.
[9]刘涛,柯国秋,宋小超,等.刚果(金)希图鲁外围物化探找矿应用[J].矿产与地质,2017,31(2):335-340.