|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Inter-Regional Comparisons on the Quaternary Large Mammalian Faunas between China and Sub-Saharan Africa显示文摘关于现代的人的起源的当前、主导的理论是 out-of-Africa 假设,它断言人现代人的左非洲的人口 100,000 年以前并且在欧亚大陆的人的代替的土生土长的人口。许多学者与 paleoenvironmental 变化等同人的 out-of-Africa 疏开。直到现在,然而,很少对动物区系的数据给予了特殊注意并且动物区系的模式是否支持流行理论。中国动物志的最近的比较学习证明在非洲和东亚之间的动物志的通讯能发生在晚第三纪期间,但是它在更新世期间是很有限的。在中国第四级的动物志,仅仅 16% 类也是在 sub-Saharan 非洲人动物志的现在。也在能与非洲的动物志有关的中国第四级的动物志的主导的 taxa 之中没有元素。为存在没有可靠证明河马和 Giraffa,以及 Panthera 狮子座,在期间在中国第四级。二争论 taxa 是 Acinonyx 和 Crocuta,仍然关于有关他们在欧亚大陆的种类鉴定有争论。两个在非洲和欧亚大陆类有 co 特定的 taxa,是可能的。尽管二个类被限制到今天的非洲,他们确实在中国有长进化的历史。为为人的 Out of 非洲假设现代人,在中国和非洲之间的有限动物区系的交换的含意还不是完全清楚的。 | TONG Haowen HU Nan LIU Jinyi Ronald CLARKE | 2011 | Acta Geologica Sinica(English Edition)2011，85，1： | 2 |
| 2 | Phanerozoic Paleomagnetism Characteristics of the Qomolangma Area in Tibet显示文摘This paper conducts systematic test research on the 2920 paleomagnetic directional samples taken from Ordovician-Paleogene sedimentary formation in the north slope of Qomolangma in south of Tibet and obtains the primary remanent magnetization component and counts the new data of paleomagnetism the times. Based on the characteristic remanent magnetization component, it calculates the geomagnetic pole position and latitude value of Himalaya block in Ordovician-Paleogene. According to the new data of paleomagnetism, it draws the palaeomagnetic polar wander curve and palaeolatitude change curve of the north slope of Qomolangma in Ordovician-Paleogene. It also makes a preliminary discussion to the structure evolution history and relative movement of Himalaya bloc. The research results show that many clockwise rotation movements had occurred to the Himalaya block in northern slope of Qomolangmain the process of northward drifting in the phanerozoic eon. In Ordovician-late Cretaceous, there the movement of about 20.0° clockwise rotation occurred in the process of northward drifting. However, 0.4° counterclockwise rotation occurred from the end of late Devonian epoch to the beginning of early carboniferous epoch; 6.0° and 8.0° counterclockwise rotation occurred in carboniferous period and early Triassic epoch respectively, which might be related with the tension crack of continental rift valley from late Devonian period to the beginning of early carboniferous epoch, carboniferous period and early Triassic epoch. From the Eocene epoch to Pliocene epoch, the Himalaya block generated about 28.0° clockwise while drifting northward with a relatively rapid speed. This was the result that since the Eocene epoch, due to the continuous expansion of mid-ocean ridge of the India Ocean, the neo-Tethys with the Yarlung Zangbo River as the main ocean basin closed to form orogenic movement and the strong continent-continent collision orogenic movement of the east and west Himalayas generated clockwise movement in the mid-Himalaya area. According to the calculation of palaeolatitude data, the Himalaya continent-continent collusion orogenic movement since the Eocene epoch caused the crustal structure in Indian Plate-Himalaya folded structural belt-Lhasa block to shorten by at least 1000 km. The systematic research on the paleomagnetism of Qomolangma area in the phanerozoic eon provides a scientific basis to further research the evolution of Gondwanaland, formation and extinction history of paleo-Tethys Ocean and uplift mechanism of the Qinghai-Tibet Plateau. | ZOU Guangfu PAN Zhongxi ZHUANG Zhonghai ZHU Tongxing LI Jianzhong FENG Xintao | 2013 | Acta Geologica Sinica(English Edition)2013，87，2： | 1 |
| 3 | Definition of the Quaternary Qiangtang Paleolake in Qinghai-Tibetan Plateau, China显示文摘Since the Quaternary, many lakes have been present in the Qinghai-Tibetan Plateau. As peculiar geological processes in the evolution of the uplifting of Qinghai-Tibetan Plateau, the distributions and evolutions of the Quaternary paleolakes in the Qinghai-Tibetan Plateau have been the focus of interest among the international geosciences circle. Comparisons of the newly obtained and existing data from field surveys, remote sensing images, characteristics of tectonic landforms and distribution of the lacustrine strata, the author have, for the first time, defined a large-sized Quaternary Qiangtang Paleolake. The paleolake starts from the east-westerly direction at Rutog in western Tibet, passing through Gêrzê, and finally ends at Nagqu in eastern Tibet. Its length is approximately 1,200 km; it is about 420 km at its widest point (north-southerly). The Paleolake forms an E-W (or NWW) ellipsoid with an estimated area of 354920 km2 . The Paleolake is bordered by the Mts. Gangdisê and Nyainqêntanglha to the south and the Karakorum Pass-Tozê Kangri-Zangbagangri-Tanggula Pass to the north. It generally appears as a basinal landform with low mountains and valleys in the central part (altitudes of 4400 m) and higher altitudes (5000 m) in the peripheries. The formation and development of the Paleolake was controlled by the nearly E-W trending structures. There are three east-westerly extending tectonic sutures inside the Paleolake area, from north to south: (1) the Shuanghu Suture; (2) the Bangong Co-Nujiang River Suture; (3) the Shiquanhe-Lhari Suture. These three sutures have generally controlled the spreading features of the Paleolake and act as the first grade lake-controlling structures. In the southern Paleolake basin, there are a series of south-northerly rift basins, which are controlled by the normal faults and exist as a series of south-northerly grabens and semi-graben faulted basins. The south-northerly rift zones have clearly exerted control over the south margin of the Paleolake as well as the distribution of the residual lake basins after the Paleolake's break up. They are the secondary lake-controlling tectonics. Discoveries of the lacustrine strata inside the Plateau, especially the successive discoveries of many high-stand lacustrine strata, are direct evidence supporting the existence of the paleolakes in the Plateau. The dating results of the lake-eroded travertine in the Dong Co in the hinterland of the Quaternary Qiangtang Paleolake have revealed that the lake-eroded travertine is of Late Pleistocene sediments. By considering the analysis of the lacustrine strata as well, the researchers have revealed that the Quaternary Qiangtang Paleolake begins its embryonic form in the Early Pleistocene, successively develops till the Middle Pleistocene, and reaches its full blossom in the middle stage of the Late Pleistocene; it further shrinks and separates by the end of the Late Pleistocene, and finally ceases its whole life as the paleolake. After the Holocene, the huge Late Pleistocene Qiangtang Paleolake no longer exists, leaving a series of widely distributed smaller lakes on the Qiangtang Plateau. These smaller, isolated water systems receive the Holocene lacustrine sediments. | SHAO Zhaogang MENG Xian'gang HAN Jian'en ZHU Dagang YANG Chaobin WANG Jin YU Jia WANG Yan HE Chengguang | 2013 | Acta Geologica Sinica(English Edition)2013，87，2： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员