辽东半岛晚新生代沉积物磁化率特征及初步解释  

Characteristic of magnetic susceptibility and its primarily interpretation of late Cenozoic sediments in Liaodong Peninsula

作　　者：伏捷[1,2] 李永化[2] 张华[2,3] 刘剑刚[2] 

机构地区：[1]辽宁师范大学外国语学院,大连116029 [2]辽宁师范大学自然地理与空间信息科学辽宁省重点实验室,大连116029 [3]辽宁师范大学海洋经济与可持续发展研究中心,大连116029

出　　处：《干旱区资源与环境》2014年第3期135-141,共7页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目"辽东山地老秃顶子冰缘地貌植物群落稳定性研究"(编号:41271064);教育部人文社会科学重点研究基地重大项目"辽宁沿海经济带开发建设对滨海湿地生态系统健康的影响及调控对策"(编号:11JJD790051)资助

摘　　要：通过对辽东半岛坡积物、红色风化壳两类沉积物磁化率的测试,揭示了研究区晚新生代以来沉积物磁化率的垂向变化特征及空间分异特征,并初步探讨了其所反映的沉积环境及其古气候变化信息。研究表明：辽东半岛坡积物S1~S4剖面、红色风化壳S5~S6剖面的质量磁化率平均值分别为71.75×10-8、65.81×10-8、68.17×10-8、151.70×10-8和305.06×10-8、473.26×10-8m3/kg,频率磁化率平均值分别为10.77%、9.67%、9.46%、10.79%和14.44%、14.95%;辽东半岛坡积物的质量磁化率值的变化特征、辽东半岛坡积物和红色风化壳剖面的频率磁化率值的变化特征一定程度上反映了其形成时的古气候信息。In this paper,two types of sediments which are slope deposit and red weathered crust were chosen from Liaodong Peninsula for magnetic susceptibility measurement.Results showed us the vertical variation characteristics and spatial distribution characteristics of sediments magnetic susceptibility since late Cenozoic in study area.The authors tried to give a preliminary interpretation for the sedimentary environment and palaeoclimate variation information by studing the magnetic susceptibility result.It is concluded that the slope deposit sections S1~S4 chosen from Liaodong Peninsula,its average value of mass magnetic susceptibility are 71.75×10-8m3/kg,65.81×10-8m3/kg,68.17×10-8m3/kg,151.70×10-8m3/kg,and frequency-dependent magnetic susceptibility are 10.77%,9.67%,9.46%,10.79%.Average value of mass magnetic susceptibility of red weathered crust sections are S5~S6 305.06×10-8m3/ kg,473.26×10-8m3/kg,and frequency-dependent magnetic susceptibility are 14.44%,14.95%.The variation characteristics of slope deposit＇s mass magnetic susceptibility,variation characteristics of slope deposit and red weathered crust＇s frequency-dependent magnetic susceptibility can reflect the palaeoclimate variation information to some extent.

关 键 词：环境磁学 红色风化壳 磁化率特征 古气候 辽东半岛 

分 类 号：P534.6[天文地球—古生物学与地层学]