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首页> 外文期刊>Palaeogeography, Palaeoclimatology, Palaeoecology: An International Journal for the Geo-Sciences >Vertebrate fossils on the roof of the world: Biostratigraphy and geochronology of high-elevation Kunlun Pass Basin, northern Tibetan Plateau, and basin history as related to the Kunlun strike-slip fault
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Vertebrate fossils on the roof of the world: Biostratigraphy and geochronology of high-elevation Kunlun Pass Basin, northern Tibetan Plateau, and basin history as related to the Kunlun strike-slip fault

机译：世界屋顶上的脊椎动物化石：青藏高原北部高海拔昆仑Pass陷盆地的生物地层学和年代学以及与昆仑走滑断层有关的盆地历史

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The Kunlun Pass Basin, at the foothill of YuzhuMountain (6224masl and the highest peak of the Kunlun Range), records Plio-Pleistocene fine-grained sediments sandwiched between glacial moraines. We document a new vertebrate fossil assemblage, the Yuzhu Fauna, with 16 mammal and 2 fish species that provide insights into basin chronology as well as the paleoenvironment adjacent to alpine glaciations in the Pliocene, in which the mammals and fishes lived. The Yuzhu Fauna consists of the following eight small mammals: Petenyia sp., Aepyosciurus sp., Nannocricetus mongolicus, cf. Orientalomys sinensis, Mimomys n. sp., Prosiphneus cf. P. eriksoni, Ochotona minor, Ochotona cf. O. lagreli, and eight large mammals: Rhinocerotidae indet., Hipparion (Proboscidipparion) pater, Qurliqnoria sp., Bovidae indet., cf. Panthera blytheae, Hyaeninae indet., Vulpes qiuzhudingi, and aff. Arctomeles sp. Two cyprinid fishes are also included: Gymnocypris sp. and Triplophysa sp. The Yuzhu Fauna has a distinctly early-middle Pliocene appearance, substantially earlier than previous age estimates, sharing broad similarities with vertebrate fossil assemblages from North China in general and the Zanda Fauna in southern Tibet in particular, including three carnivorans (Vulpes qiuzhudingi, cf. Panthera blytheae, and aff. Arctomeles sp.), one artiodactyl (Qurliqnoria), and at least two rodents (Aepyosciurus and Prosiphneus) and a lagomorph (Ochotona). We re-interpret published magnetostratigraphy to arrive at a correlation of the Yuzhu Fauna to the lower part of Chron 2Ar (Gilbert Chron 4.2-3.6 Ma), and the entire basin sequence spanning part of chrons 1n through 3n.3n, i.e., ~4.9-0.5 Ma. Our revised magnetic age for the Kunlun Pass Basin strata implies a slip rate of 7.2-6.1 mm/year along this part of the Kunlun Pass strike-slip fault system, much slower than its modern rate of off set.
机译：位于玉竹山脚下的昆仑Pass口盆地（6224masl，是昆仑山脉的最高峰），记录了夹在冰川冰粒之间的上新世-更新世细粒沉积物。我们记录了一种新的脊椎动物化石组合，即玉竹动物群，它具有16种哺乳动物和2种鱼类，可洞悉盆地的年代，以及上新世的高山冰川附近的古环境，哺乳动物和鱼类都生活在此。玉竹动物群包括以下八种小型哺乳动物：Petenyia sp。，Aepyosciurus sp。，Nannocricetus mongolicus，请参见。东方东方草sp。，Prosiphneus参见。 P. eriksoni，未成年人Ochotona，比照Ochotona。 O. lagreli和八种大型哺乳动物：Rhinocerotidae indet。，Hipparion（Proboscidipparion）模式，Qurliqnoria sp。，Bovidae indet。，请参见。 Panthera blytheae，Hyaeninae indet。，狐狸丘竹顶基和aff。 Arctomeles sp。还包括两种鲤科鱼类：Gymnocypris sp.。和Triplophysa sp。玉竹动物区系的上新世明显早于中年，比以前的年龄估计要早得多，与华北地区尤其是西藏南部的赞达动物区系的脊椎动物化石组合具有广泛的相似性，包括三个食肉动物（Vulpes qiuzhudingi，cf. Panthera blytheae和aff。Arctomeles sp。），一个偶蹄动物（Qurliqnoria）和至少两个啮齿动物（Aepyosciurus和Prosiphneus）和一个泻湖动物（Ochotona）。我们重新解释已发表的地层学，以得出玉竹动物群与2Ar年代下部（吉尔伯特Chron 4.2-3.6 Ma）之间的相关性，以及整个盆地序列（从1n到3n.3n的一部分），即〜4.9。 -0.5马我们对昆仑山口盆地地层的磁性年龄进行了修订，这意味着昆仑山口走滑断层系统这部分的滑移速率为7.2-6.1毫米/年，远低于其现代偏移速率。

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