溧水火山岩岩石磁性组构的综合分析  

COMPREHENSIVE ANALYSIS ON THE MAGNETIC FABRIC OF LISHUI VOLCANIC ROCKS

作　　者：贺绍英[1] 唐震[1] 许同春[1] 

机构地区：[1]地质矿产部华东石油地质局,江苏省地质矿产局第二地质大队,国家地震局地球物理研究所

出　　处：《地球物理学报》1994年第A02期334-341,共8页Chinese Journal of Geophysics

摘　　要：报道了溧水地区中、新生代火山岩的磁性测定结果，指出其３个磁化率的主轴的分异程度与簇集程度的不同，可分为５种ＡＭＳ类型，并认为岩石密度与其有对应关系，对于同一火山旋回的产物，岩石密度可作为简易识别的参数．结合综合地球物理勘探资料，可以推断火山口的状况、熔岩流的展布等，并佐证了前人提出的最大或最小磁化率主轴的方向确定熔岩流向的方法．The magnetic properties of Cenozoic-Mesozoic volcanics in Lishui is introdued. According to the varying degrees in differentiation and cluster of tile directional distribution of three AMS principal axes for each site, five categories can be grouped.It is considered that the density of rocks concering the AMS categries and could be referred to as a simple distinguishing parameter for them of the products of a cycle of volcano.Combining with geophysical prospecting,the state of volcanic vent and the extension of tuff can be deduced.The estimate of flow direction for lava with maximum or minimum susceptibility direction is applied there.

关 键 词：火山岩 磁性组构 密度 磁异常 岩石磁性 

分 类 号：P588.14[天文地球—岩石学]