图1. 柴达木北缘区域构造单元(a)^[17]和研究区地质简图(b)^[18]
1—第四系沉积物;2—古近-新近系;3—下白垩统犬牙沟组;4—下-中侏罗统大煤沟组;5—下-中三叠统隆务河组;6—下石炭统怀头他拉组;7—上泥盆统牦牛山组;8—寒武-奥陶系滩间山群;9—南华系全吉群;10—中元古界万洞沟群;11—古元古界达肯达坂群;12—古元古界化隆群;13—二叠纪岩体;14—泥盆纪岩体;15—志留纪岩体;16—奥陶纪岩体;17—奥陶纪辉长岩;18—古元古代环斑花岗岩;19—地名;20—道路;21—地层界线;Ⅰ—拉脊山-中祁连南缘断裂;Ⅱ—宗务隆-青海南山断裂;Ⅲ—乌兰-鱼卡断裂;Ⅳ—柴北缘断裂;Ⅴ—阿尔金走滑断裂

Fig.1. Regional tectonic unit in the northern margin of Qaidam Basin (a) and geological map of the region(b)
1—Quaternary sediments; 2—Paleogene-Neogene; 3—lower Cretaceous Quanyagou formation; 4—lower-middle Jurassic Dameigou formation; 5—lower-middle Triassic Longwuhe formation; 6—lower Carboniferous Huaitoutala formation; 7—upper Devonian Maoniushan formation; 8—Cambrian-Ordovician Tanjianshan group; 9—Nanhua period Quanji group; 10—middle Proterozoic Wandonggou group;11—Paleoproterozoic Dakendaban group; 12—Paleoproterozoic Hualong group; 13—the Permian rock mass; 14—the Devonian rock mass; 15—the Silurian rock mass; 16—the Ordovician rock mass; 17—the Ordovician gabbro; 18—the Paleoproterozoic ringspot granite; 19—place names; 20—road;21—stratigraphic boundary;Ⅰ—the southern margin of Lajiishan-middle Qilian fault; Ⅱ—Zongwulong-Qinghainanshan fault;Ⅲ—Wulan-Yuka fault; Ⅳ—the fault of the north Chaidamu basin; Ⅴ—Altun strike-slip fault