华北克拉通南部及邻区航磁异常特征与构造分区

据地球物理、地质资料分析，华北克拉通南部及邻区发育NWW—近EW向和NE—NNE向等两组断裂，其中焦作—商丘断裂带、鲁山—阜阳—淮南断裂带、栾川—固始—肥中断裂带和郯城—庐江断裂带、夏邑—涡阳—麻城断裂带具有构造分区断裂特征。通过航磁异常特征分析，华北克拉通南部分为秦岭—大别磁异常区和南华北磁异常区，后者可次分为豫西磁异常区、豫东磁异常区、夏邑—阜阳磁异常带和徐州—淮南磁异常区等四个磁场分区。结合分区断裂系统研究，指出华北克拉通南部中新生代构造分区包括豫西盆岭区、豫东盆地区和徐州—淮南盆地区。豫西盆岭区以NE向的嵩县—谭头、洛宁—卢氏和灵宝—朱阳盆地及熊耳山、崤山和小秦岭盆岭相间分布为特征；豫东盆地区发育NWW向伸展断陷，而徐州—淮南盆地区则以向NW逆冲断层及与之伴生的线性褶皱和断陷盆地为特征。

Aeromagnetic Anomalies Characteristics and Tectonic Subareas of Southern North China Craton and Adjacent Regions

Based on the research of geology and geophysics, two fault zones--NWW-EW and NE-NNE trending developed in the southern North China Craton (NCC). Among that, Jiaozuo-Shangqiu fault, Lushan-Fuyang-Huainan fault, Luanchuan-Gushi-Feizhong fault, Tancheng-Lujiang fault and Xiayi-Woyang-Macheng fault have characteristic of structural subarea. Besides, according to the analysis of aeromagnetic anomaly, the writers divide southern NCC and adjacent areas into Qinling-Dabie aeromagnetic anomaly zone and southern NCC aeromagnetic anomaly area. Furthermore, the latter can be divided into western Henan, eastern Henan, Xiayi-Woyang and Xuzhou-Huainan aeromagnetic anomaly area. Combined with research of fault systems in structural subarea, the writers divided the southern NCC in Meso-Cenozoic into western Henan basin-ridge area, eastern Henan basin area and Xuzhou-Huainan basin area. The western Henan basin-ridge area has the characteristic of partitioning distribution among the Songxian-Tantou, Luoning-Lushi, Lingbao-Zhuyang basin and Xiong'er Mountain, Yaoshan Mountain, Xiaoqinling Mountain. The eastern Henan basin area develops NWW trending extensional faulted-basin which the Xuzhou-Huainan basin area has the characteristic of NW trending thrust faults and associated with linear folds and faulted-basins.