根据航磁解释的塔里木盆地基岩分布

根据对塔里木盆地航磁异常研究，将盆地基岩区划为：１）塔西南古元古构造活动带穿插的新太古陆核；２）中部古（或中）元古镁铁超镁铁岩墙；３）北部古元古基底的海西活化区；４）镁铁超镁铁岩墙向东北延伸；５）塔东南中、新元古基底的加里东断褶带（海西改建）；６）巴楚古元古基底的海西活动区。盆地基岩的主体是在古（或中）元古代，向南运移的北塔里木地块与向北运移的南塔里木地块相接触，经由壳底幔顶的融熔岩浆沿边缘深断裂上涌形成的镁铁超镁铁岩墙将它们牢固地结合成一体．提出了罗布泊断陷是盆地油气勘探很有远景的地区，急需开展勘查．

Basement Rock Distribution in Talimu Basin inferred from Aeromagnetic Data

On the basis of interpretation for aeromagnetic anomalies ,it is held that the basement rock inTalimu Basin can be divided into following six zones : l )Neoarchacan continental nucleus penetrated by Paleoproterozoic structral active belt in southwest Talimu Basin; 2) Paleoproterozoic (or Mesoproterozoic)mafic and ultramafic dike in the middle of ihe basin;3)Hercynian activation zone of Paleoproterozoic base-ment in the north of the basin ; 4 )the northeastward extension of middle mafic and ultramafic dike ; 5)Cale-donian fault-fold belt (Hercynian deformation) in the southeast of it ; 6)Hercynian activation zone of Paleo-proterozoic basement in Bachu. It seems that the main part of the basement is the combination of the north-ern Talimu massif migrating southward with the southern Talimu massif migrating northward in Paleoproterozoic(or Mesoproterozoic)era,and they were welded firmly into an integral whole by the mafic and ul-tramafic dike,which was formed by melted magma shoving along marginal deep fracture from the crustal bottom and the mantal top. It is pointed out that Luobupo fault depression has a good developing prospect ,and a further exploraiion is needed immediately.