Zhang Xue-Fei, Zheng Mian-Ping
Guang Pu Xue Yu Guang Pu Fen Xi. 2014 Nov;34(11):3119-22.
The present article chooses the core from the borehole SZK01 in Zabuye Lake as the main research object. According to the results of X-ray powder diffraction of clay minerals, the major components are illite, illite and smectite mixed layer mineral (I/S), kaolinite and chlorite. According to the different species and contents of clay, integration of the characteristics of mineral and the results of Δ18O, we reestablished the evolution process of paleoclimate in Zabuye Lake. In compaison with SZK02 core in Zabuye, Greenland GISP2 and GRIP and Guliya ice core, it contains 5 stages since 115 ka in Zabuye: the last interglacial (15-75.5 ka), the earlier last glacial (75.5-60 ka), the interstage of the last glacial (60-30.1 ka), the last glacial maximum (30.1-16.7 ka) and deglacial-holocene (since 16.7 ka). We also recognized 6 Heinrich events (H1-H6) and warm event in 71 ka. In particular, the content of kaolinite is low, with the negative-skewed value of Δ18O in 52-53 ka, while the value of Δ18O in SZK02 and Guliya ice core is negative-skewed too, indicating the cold event in Tibet plateau, named H5-1. All the above demonstrated that the climate in Tibet plateau is global since the earlier last glacial, and it also has regional characteristics.
本文选取扎布耶盐湖钻孔SZK01岩芯为主要研究对象。根据黏土矿物的X射线粉末衍射结果，其主要成分为伊利石、伊利石和蒙脱石混层矿物（I/S）、高岭石和绿泥石。依据黏土的不同种类和含量，结合矿物特征及δ18O结果，重建了扎布耶盐湖古气候演化过程。与扎布耶SZK02岩芯、格陵兰GISP2和GRIP以及古里雅冰芯对比，扎布耶自115 ka以来包含5个阶段：末次间冰期（15 - 75.5 ka）、末次冰期早期（75.5 - 60 ka）、末次冰期间阶段（60 - 30.1 ka）末次盛冰期（30.1 - 16.7 ka）和冰消期 - 全新世（自16.7 ka以来）。还识别出6次 Heinrich 事件（H1 - H6）和71 ka的暖事件。特别是高岭石含量低，52 - 53 ka时δ18O值呈负偏态，而SZK02和古里雅冰芯的δ18O值也呈负偏态，指示青藏高原的冷事件，命名为H5 - 1。上述所有表明，青藏高原自末次冰期早期以来的气候具有全球性，同时也具有区域特征。
