海南文昌沿海老红砂沉积组构研究  

A STUDY ON THE DEPOSITIONAL FABRIC OF THE “ OLD RED SANDY SEDIMENT” IN WENCHANG COUNTY OF HAINAN ISLAND

作　　者：许峰宇[1] 王为[2] 

机构地区：[1]徐州师范大学地理系,徐州221009 [2]华南师范大学地理系,广州510631

出　　处：《热带地理》1997年第1期18-22,共5页Tropical Geography

摘　　要：本文通过对磁化率各向异性测量，研究了海南文昌沿海老红砂的沉积组构特征，认为老红砂沉积组构特征虽然变化较大，但仍有自己的展布特征，根据磁性的有无能轻易地把它与滨海沉积区别开来，其沉积组构特征与风成砂丘的沉积组构相似．深入细致地开展老红砂与滨海沉积、风成砂丘沉积组构特征的对比研究，对于说明老红砂的搬运介质、力源和方向都有重要意义。The depositional fabric of the ' Old Red Sandy Sediment' (ORSS) in Wenchang County ofHainan Island is st'Udied by using the method of measurement of anisotropy of magneticsusceptibility. The result indicates that although the grain fabrics of ORSS samples differs fromeach other, it is characterized by that the percentage of anisotropy (P) is 1. 0031 ≤p≤1. 0371being highly relevant to foliation (F), but less to lineation (L). Such characteristics are verysimilar to those of coastal aeolian dunes. ORSS can also be easily distinguished from the littoraldePOSits according to the degree of magnetism within the deposit s. Detailed comparison of thedepositional fabric betWeen ORSS and littoral and aeolian deposits is useful to the study of theorigin of ORSS.

关 键 词：海南 老红砂 磁化率 各向异性 沉积组构 

分 类 号：P512.2[天文地球—地质学]