玛珥湖地区～9000cal.yr以来地球磁场的变化与气候演化的响应机制  

Geomagnetic Variations and Climate Evolution since ～9cal. Kyr as Recorded by Maar Lake's Sediments

作　　者：曾永耀[1,2] 吴松[1] 张洒[1] 杨积伟[1] 权红梅[3] 阳杰[4] 

机构地区：[1]兰州大学地质科学与矿产资源学院,甘肃兰州730000 [2]兰州资源环境职业技术学院,甘肃兰州730600 [3]兰州城市学院培黎石油工程学院,甘肃兰州730070 [4]中山大学地球科学系,广东广州510275

出　　处：《甘肃联合大学学报（自然科学版）》2011年第6期35-39,共5页Journal of Gansu Lianhe University :Natural Sciences

摘　　要：玛珥湖位于东亚热带地区,其稳定、连续、粒度相对均一且无明显扰动的细粒湖泊沉积物记录了～9000cal.yr以来东亚热带区域地球磁场长期变化(PSV)与气候演变的信息.本次研究在湖泊中心分别取深～8m的探井和～16m的钻孔沉积物,在前人工作的基础上,重建其记录的地球磁场长期变化特征,提取百年至数十年尺度的气候变化信息,进一步探讨该区域的气候变化规律对全球变化的响应特征和驱动机制.因此,我们选择玛珥湖沉积物,进行全新世相对地球磁场长期变化与高频气候变化的研究,分别对比、讨论二者在大区域范围内与其它记录在时、空上的异同,探讨该区域二者之间可能存在的联系和响应机制.A paleomagnetic study,supported by rock magnetic data,indicates that the lake sediments document a reliable paleosecular variation（PSV） record since^9000 cal.Based on susceptibility correlation,a composite sediment profile has been compiled from the ~16m long core and the ~8m deep well Maar lake,a crater basin located on Hainan Island,Southern China.Fine and homogeneous silty clay corroborates with a stable,continuous and undisturbed deposition,which recorded reliable Geomagnetic paleosecular variations and climate change information.Therefore,we conduct a research of relations between PSV and climate changes from a completely initiative perspective via Maar lake sediments and then compare and study their similarities and differences to explore their potential relations.

关 键 词：玛珥湖 地磁场长期变化 沉积物粒度 颜色反射率 气候变化 

分 类 号：P588.14[天文地球—岩石学] P534.45[天文地球—地质学]