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尝试对南黄海东北陆架YSDP105孔0.60—29.68m的沉积层序进行环境磁学的研究,测量了岩心的磁化率、非磁滞剩磁、等温剩磁、饱和等温剩磁等磁学参数。对磁学参数及其有关比值的研究发现,沉积层序以含碎屑成因的低矫顽力磁性矿物为主,另含少量高矫顽力磁性矿物。磁性矿物大部分为准单畴,少部分为单畴;其粒度受控于沉积环境:从潮间带、浅水潮下带→深水潮下带→浅海,磁性矿物的粒度依次递减,反映了沉积水动力的控制作用。自冰消期以来,沉积层序中高矫顽力磁性矿物的含量逐渐降低,表明进入黄海的风尘物质逐渐减少。
This paper attempts to study the environmental magnetism of the sedimentary sequence of 0.60-29.68m YSDP105 hole in the South China Yellow Sea shelf. The magnetic susceptibility, non-hysteresis remanence, isothermal remanent magnetization, parameter. The study on the parameters of magnetism and its related ratio shows that the sedimentary sequence is mainly composed of low coercivity magnetic minerals with detritus, and a small amount of high coercivity magnetic minerals. Most of the magnetic minerals are quasi-monodomain, and a few are monodomain. The grain size is controlled by sedimentary environment: from the intertidal zone, shallow tidal zone → deep tidal zone → shallow sea, the size of magnetic minerals decreases in turn, reflecting the deposition Hydrodynamic control. Since the maturity of ice, the content of high-coercivity magnetic minerals gradually decreases in the sedimentary sequence, indicating that dust and dust entering the Yellow Sea gradually decrease.