地质论评2012，Vol.58Issue(2)：350-358,9.
大别山北麓竹竿河黄土—古土壤的磁组构特征及其古环境意义
Magnetic Fabric Characteristics of Zhuganhe Loess-Palaeosols Profile on Northern Slope of Dabie Mountains and Their Environmental Significances
摘要
Abstract
The magnetic fabric parameters of the Zhuganhe loess-palaeosols profile on the northern slope of the Dabie Mountains show that the mean values (Pt < 1. 02, F < 1. 02) of the upper (0 ～ 1480cm) strata is less than that of the bottom. F-L and Pi--q plots of the samples very clearly indicate that the samples have oblate ellipsoids fabric, and the magnetic foliations are dominant over magnetic lineations. Stereographic projection of anisotropy of aximum magnetic principal axis shows that the direction of declination of the upper strata is relatively dispersing with inclination of the long axis smaller than 15°and short axis bigger than 60°, however,the bottom is relatively concentrating with inclination of the long axis smaller than 10° and short axis bigger than 80°; Generally, magnetic fabric characters show that the upper strata is aeolian deposit and the bottom is hydraulic deposit. The stereographic projections of the K1 and K3 demonstrate that the wind direction in the comparatively upper strata is NW-SE, While the direction of water flowing in the bottom strata section is SW-NE, which is corresponding to the trend of the Zhugan River, the K1, optimal directions of AMS may be controlled by the uplift of the Dabie Mountains.关键词
大别山/磁组构/黄土—古土壤/沉积环境Key words
Dabie Mountains/ magnetic fabric/ loess-palaeosols/ sedimentary environment引用本文复制引用
张华,宋传中,张妍,章骏杰,张浩然,任升莲..大别山北麓竹竿河黄土—古土壤的磁组构特征及其古环境意义[J].地质论评,2012,58(2):350-358,9.基金项目
本文为国家自然科学基金资助项目(编号40372097、41072161、40772131)、中国地质调查局科技项目(编号1212011121114)、科技部973预研项目(编号hgzy0008)和安徽省教育厅自然科学项目(编号KJ2011z049)的成果. （编号40372097、41072161、40772131）
