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对新疆准噶尔盆地北部晚渐新世-早中新世的连续地层进行了详细的古地磁年代学研究.厚约192m的铁尔斯哈巴合剖面位于乌伦古河北岸,富含哺乳动物化石.岩石磁学的实验表明,该套河湖相沉积物特征剩磁的载体主要为磁铁矿和赤铁矿.磁性地层分析确定的极性序列可与标准古地磁年表(GPTS)清晰对比.此外,铁尔斯哈巴合动物群的层位位于古近系和新近系的界线之下,而索索泉动物群层位恰位于此界线之上,由沉积速率推算得到的铁尔斯哈巴合动物群和索索泉动物群的大致年代分别为25.2和22.5Ma.
A detailed palaeomagnetic geochronology study was conducted on successive strata of the Late Oligocene-Early Miocene in the northern Junggar Basin in Xinjiang Province. The 192-m-thick Geerhaba section is located on the northern bank of the Wulungu River and is rich in mammalian fossils. Magnetism experiments show that the magma and hematite are mainly magnetite and hematite, and the polarity sequence determined by magnetic stratum analysis can be clearly compared with the standard paleomagnetic time-table (GPTS). , The strata of the Weiershabahe fauna are located below the boundary between the Paleogene and the Neogene, while the strata of the Sosoquan fauna are located just above this boundary, and the population of the Gernisbach synusia estimated from the sedimentation rate And the approximate age of the Sorso Spring fauna were 25.2 and 22.5 Ma, respectively.