摘要
青海省海西地区是中国西北一个非常重要的金属及非金属成矿区。也日更金铜镍多金属矿床周边古老变质岩系发育,华里西期、印支期构造岩浆活动频繁并且强度大,构造作用较复杂,近EW向和NWW向断裂构造及受其控制的中酸性脉岩发育,围岩蚀变现象明显,局部地段显示了较为明显的金、铜、镍等多金属矿化,同时有1∶50000及1∶25000化探综合异常显示,1∶5000地物化剖面异常清晰,最后通过探槽工程揭露,显示出该区具有较好的成矿远景。
Haixi area of Qinghai is a very important metallic and non-metallic mineralization area in the northwest of China.Old metamorphic series are widely developed in Yerigeng Au-Cu-Ni polymetallic ore field and surrounding area.It corresponds frequent and intense magmatic activity,complex structures in Variscan and Indosinian period.The nearly EW-trending faults and NWW-trending faults structure and intermediate-acidic vein rocks which are controlled by the fault structure are well developed.The phenomenon of wall rock alterrtion is obvious,and Au-Cu-Ni polymetallic mineralization is obvious locally.Geochemical prospecting works at 1 ∶ 50,000 and 1 Haixi area of Qinghai is a very important metallic and non-metallic mineralization area in the northwest of China.Old metamorphic series are widely developed in Yerigeng Au-Cu-Ni polymetallic ore field and surrounding area.It corresponds frequent and intense magmatic activity,complex structures in Variscan and Indosinian period.The nearly EW-trending faults and NWW-trending faults structure and intermediate-acidic vein rocks which are controlled by the fault structure are well developed.The phenomenon of wall rock alterrtion is obvious,and Au-Cu-Ni polymetallic mineralization is obvious locally.Geochemical prospecting works at 1 ∶ 50,000 and 1 ∶ 25,000 scale shows clear anomalies,and composite geophysical and geochemical prospecting section at 1 ∶ 5,000 shows clear anomalies.At last,the obvious mineralization parts are revealed through exploratory trenching.It appears that area has favorable metallogenic prospect.25,000 scale shows clear anomalies,and composite geophysical and geochemical prospecting section at 1 ∶ 5,000 shows clear anomalies.At last,the obvious mineralization parts are revealed through exploratory trenching.It appears that area has favorable metallogenic prospect.
引文
姜春发,杨经绥,冯秉贵,等.1992.昆仑开合构造[M].北京:地质出版社,154-156.
潘彤,孙丰月.2003.区域地球化学中大面积、低浓度分带异常评价---以督冷沟铜钴矿发现为例[J].地质地球化学31(3)85-89.
潘彤.2004.青海东昆仑督冷沟铜钴矿床控矿条件的探讨[J].矿产与地质,26(2)85-89.
祁生胜.2013.青海省大地构造单元划分与成矿作用特征[J].青海国土经略,(5):53-62.
青海省地质局.1973.1∶20万加鲁河幅区域地质调查报告[R].西宁:青海省地质局.
青海省有色地质矿产勘查局地质矿产勘查院,长安大学,青海省有色地勘局八队.2011.青海省都兰县沟里地区1:5万矿产地质、水系沉积物测量综合调查项目成果报告[R].
孙崇仁.2008.青海省岩石地层[M].北京:中国地质大学出版社,54-107.
王福德,李云平,贾妍慧.2018.青海金矿成矿规律及找矿方向[J].地球科学与环境学报,40(2):168-175.
许长坤,刘世宝,赵子基,等.2012.青海省东昆仑成矿带铁矿成矿规律与找矿方向研究[J].地质学报,(10):1612-1678.