MAGNETOSTRATIGRAPHY OF MARINE-TERRIGENOUS FACIES DEPOSITS IN BOHAI BAY
MAGNETOSTRATIGRAPHY OF MARINE-TERRIGENOUS FACIES DEPOSITS IN BOHAI BAY
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发表时间：
2006
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通讯作者：
Yao Zheng-quan;Guo Zheng-tang;C. Yu-kun;Xiao Guo-qiao;Shao Yong-xin;Wang Xu-long;Hao Qing-zhen;Lu Yan-chou
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作者：
Yao Zheng-quan;Guo Zheng-tang;C. Yu-kun;Xiao Guo-qiao;Shao Yong-xin;Wang Xu-long;Hao Qing-zhen;Lu Yan-chou
渤海湾海陆交互相沉积对研究海陆交互环境变化、新构造、华北平原演化史等具有重要意义，而建立可靠的年代学格架则是基础（203.57 m）从天津钻探，结果表明，渤海湾西部的磁核由4个正常磁带组成，分别与Brunhes、Jaramillo、Olduvai和Gauss磁带进行对比，和三个反向磁带对应Matuyama和Kaena。因此，沉积速率的一致性表明，渤海湾自上新世晚期以来一直处于稳定的沉降状态，这一结果也为渤海湾地层对比和海相沉积研究提供了可靠的年代学框架。渤海湾西部的陆源变化
Marine-terrigenous deposits in Bohai Bay is significant for studying marine-terrigenous environmental change,new tectonics,evolutive history of North China Plain and so on,while establishing reliable chronology framework is the base.Here,a detailed paleomagnetic investigation of BZ_(2) core(203.57 m) drilled from Tianjin,western Bohai Bay has been carried out.The results show that the core consists of four normal magnetozones which can be correlated to Brunhes,Jaramillo,Olduvai and Gauss,and three reverse magnetozones corresponding to Matuyama and Kaena.Hence,the core began deposition at about 3.18 MaBP.The consistency of sedimentation rate between polarity boundaries show steady subsidence in Bohai Bay since late Pliocene.And the results also have provided reliable chronology framework for studying stratum correlation and marine-terrigenous changes in western Bohai Bay.