岩屑地球化学测量在甘肃北山干旱戈壁荒漠区的找矿效果—

岩屑地球化学测量在甘肃北山干旱戈壁荒漠区的找矿效果——以三白墩地区金砷矿的发现为例

雷自强, 陈杰, 陈世明, 方成豪, 杨镇熙, 王振

Application of geochemical survey of lithic fragments in ore prospecting in arid Gobi desert of the Beishan area, Gansu Province: A case study of the discovery of the gold-arsenic deposit in Sanbaidun area

LEI Zi-Qiang, CHEN Jie, CHEN Shi-Ming, FANG Cheng-Hao, YANG Zhen-Xi, WANG-Zhen

图1 三白墩地区区域地质简图
a—区域地层分区;b—区域岩性分布;c—区域地质图;1—第四系冲积物;2—第四系残坡积物;3—敦煌岩群B岩组;4—敦煌岩群C岩组;5—石英闪长岩;6—石英二长闪长岩;7—二长花岗岩;8—花岗闪长岩;9—英云闪长岩;10—太古宇花岗质-英云闪长质片麻岩;11—古元古界中低级变质岩;12—石炭-二叠系浅海相碎屑岩;13—基性-超基性岩;14—加里东-华力西期石英闪长岩和花岗岩;15—韧性剪切带和强应变带;16—断层;17—地质界线;18—金矿床;19—地层大区分界线;20—地层区分界线;21—研究区;Ⅱ—塔里木地层区;Ⅲ—华北地层区;Ⅳ—昆仑-祁连-秦岭地层区;

Ⅱ_{2}^{1}

—敦煌地层分区;

Ⅱ_{2}^{2}

—罗雅楚山-柳园地层分区;

Ⅲ_{3}^{1}

—阿拉善地层分区;

Ⅳ_{4}^{1}

—走廊地层分区;

Ⅳ_{4}^{2}

—北祁连地层分区;

Ⅳ_{4}^{3}

—中祁连地层分区;

Ⅳ_{4}^{4}

—南祁连地层分区

Fig.1 Regional geological map of Sanbaidun area
a—regional stratigraphic division; b—regional lithology distribution; c—regional geological map;1—Quaternary alluvium; 2—Quaternary eluvial and Deluvial deposits; 3—rock group B of Dunhuang rock group; 4—rock group C of Dunhuang rock group; 5—quartz diorite; 6—quartz monzonite diorite; 7—monzogranite; 8—granodiorite; 9—tonalite; 10—Archean granitic tonalite gneiss; 11—Paleoproterozoic middle and low-grade metamorphic rocks; 12—Carboniferous-Permian shallow marine clastic rock; 13—basic-ultrabasic rock; 14—Caledonian-Wallician quartz diorite and granite; 15—ductile shear zone and strong strain zone; 16—fault; 17—geological boundary; 18—gold deposit; 19—stratigraphic boundary; 20—stratigraphic boundary; 21—study area; Ⅱ—Tarim stratigraphic area;Ⅲ—North China stratigraphic area; Ⅳ—Kunlun -Qilian-Qinling stratigraphic area;

Ⅱ_{2}^{1}

—Dunhuang stratigraphic division;

Ⅱ_{2}^{2}

—Luoyachushan-Liuyuan stratigraphic division;

Ⅲ_{3}^{1}

—Alxa stratigraphic division;

Ⅳ_{4}^{1}

—Zoulang stratigraphic division;

Ⅳ_{4}^{2}

—stratigraphic division of north Qilian;

Ⅳ_{4}^{3}

—stratigraphic division of middle Qilian;

Ⅳ_{4}^{4}

—stratigraphic division of south Qilian