| 1 | ^(40)Ar-^(39)Ar geochronology of Cenozoic Linzizong volcanic rocks from Linzhou Basin, Tibet, China, and their geological implications显示文摘Whole-rock and mineral separate Ar-Ar dating was carried out for the Linzizong volcanic rocks at Linzhou Basin in Tibet to constrain the time span of volcanism and the corresponding stratigraphic sequence. Sampling was based on detailed geologic mapping and stratigraphic se-quence of Dianzhong, Nianbo, Pana Formations, systemati-cally from the bottom to near the top. The results indicate that the Linzizong volcanic rocks erupted from Paleocene to middle of Eocene (64.43—43.93 Ma). Among them, the Pana Formation formed from ca. 48.73 to 43.9 Ma, the Nianbo Formation around 54 Ma and the Dianzhong Formation from 64.4 to 60.6 Ma. In combination with evidence from the geochemical characteristics of the volcanic rocks, and from stratigraphy in southern Tibet, it is postulated that the age of the lowest member in the Dianzhong Formation of the Lin-zizong volcanic rock, which overlies unconformably the Late Cretaceous Shexing Formation, likely corresponds to the inception of the collision between Indian and Asian conti-nents in southern Tibet. | ZHOUSu MOXuanxue DONGGuochen ZHAOZhidan QIURuizhao GUOTieying WANGLiangliang | 2004 | Chinese Science Bulletin2004，49，18： | 71 |
| 2 | Fission track age of granite batholith from Southern Tibet:implications for the plateau uplift显示文摘Fission track (FT) ages of apatite and zircon from four granite batholiths from Lhasa and Shannan areas are measured. The FT ages of apatite range from 3.2 to 8.3 Ma, corresponding to the uplift rates of 0.12 to 0.20 mm*a-1 during this period. The uplift height is 580 m, showing that there is not large-scale rapid uplifting in southern Tibet from 3.2 to 8.3 Ma. The zircon FT ages of Lhasa batholith are 25.9±1.7 and 32.7±2.8 Ma, yielding an uplift rate of 0.08 mm*a-1 between 26 and 33 Ma. Combining this work with other studies, it is suggested that the average uplift rate in southern Tibet is low from the time of collision between India and Asian continents to ~3 Ma. The uplift of Tibetan Plateau seems to have finished in multi-stage processes with varied rates. | ZHAOZhidan MOXuanxue GUOTieying ZHANGShuangquan ZHOUSu DONGGuochen WANGLiangliang ZHANGFengqin WANJinglin | 2003 | Progress in Natural Science:Materials International2003，13，8： | 6 |
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