通过对腾格里沙漠南缘红水河剖面的地层分析和年代序列建立，依据分辨率40～50a的TOC、TIC、元素和稳定同位素（δ180）分析及孢粉分析，重建了腾格里沙漠南缘过渡区全新世8000～3000aBP期间的古气候演变序列。结果显示，（7980）～6870aBP气候变化特点为具振荡性的升温期，且尤以7410～6870aBP最为明显；6870～4620aBP为高温期，并可分为6620～5770aBP温暖而湿润的第1高温期和5360～5130aBP以干热为特征的第2高温期。在5880～5360aBP，即两个高温期之间，气候曾发生持续干化，温度有3次波动降低。第1高温期可被视为本区全新世气候适宜期。5130～4620aBP温度有所降低，但湿度增加，并在4830～4790aBP存在一强降温事件，预示着全新世高温期的衰减；4620aBP开始为降温期并在4620～4320，4010～3590和3270～（3110）aBP出现3次分别与高山冰进相关的低温期。

为探讨华北克拉通中部地壳的磁性结构与深部地质过程之间的相互关系，测量了五台一集宁地壳剖面44件岩石样品的磁性参量及磁滞回线。结合岩石学、地球化学及磁卫星资料的综合研究结果表明，整个断面具有明显的磁性分带结构特征。上地壳、中地壳与下地壳上部岩石饱和磁化强度（Js）的平均值分别为58.7A/m、681.2A/m与1068.0A/m，而饱和等温剩磁JSIRM为4.1A/m、77.9Am和138.4A/m。磁性与变质相及成分对应分析显示，断面内的磁性结构主要受变质作用控制（尤其是变酸性岩与变基性岩）。Js值的变异系数Vc，上地壳为62.2%、中地壳为62.5%、下地壳为143.7%，而JSIRM值的变异系数则分别为70.7%、86.1%、165.4%。中一下地壳之间vC值的差异远大于上一中地壳，显示了地壳深部磁性强度的非均一分布特征。本区中-下地壳岩石的磁化强度明显高于秦岭造山带北缘的登封群与太华群，这一差异可能与两区地壳深部热结构的明显差异相关。结合磁卫星长波长磁异常分析推测，地壳断面中基性麻粒岩的磁性代表了区域下地壳的磁化强度，如果地壳深部的剩余磁性以热粘滞剩磁（TVRT）为主，则可估算出本区下地壳磁化强度约为4.85A/m，与目前世界上许多地盾区下地壳的磁化强度值较为接近。

In this study, soil magnetic measurements (susceptibility and hysteretic parameters) and soil hydrocarbon analyses were conducted on samples from three profiles (profiles I and II run across, and profile III runs parallel to the trend of the Jingbian gas field in the Ordos basin, central China) to determine the relationship between themagnetic anomalies (e.g., volume-specific magnetic susceptibility k) and the hydrocarbon seepage environments. The results document a strong correlation between magnetic susceptibility and soil-gas hydrocarbon concentration. Furthermore, the spatial distribution of k and hydrocarbon anomalies correlate with those of the gas field. In addition, magnetic minerals in the soils with higher susceptibility are predominantly magnetite, with little or no substitution of titanium compared to that of samples with lower susceptibility (＜7×10-5 SI [International Unit of susceptibility]). These results provide strong evidences for the formation of highly magnetic minerals in close association with hydrocarbon seepage. Recognition of such seepageinduced magnetic anomalies can be used to facilitate the exploration for oil and gas in China and elsewhere.