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YAO Jianxin BO Jingfang HOU Hongfei WANG Zejiu MA Xiulan LIU Fengshan HU Guangxiao JI Zhansheng WU Guichun WU Zhenjie LI Suping GUO Caiqing LI Ya 《《地质学报》英文版》2016,90(4):1069-1081
Scientific research and productive practice for earth history are inseparable from the accurate stratigraphic framework and time framework. Establishing the globally unified, precise and reliable chronostratigraphic series and geological time series is the major goal of the International Commission on Stratigraphy(ICS). Under the leadership of the ICS, the countries around the world have carried out research on the Global Standard Stratotype-section and Points(GSSPs) for the boundaries of chronostratigraphic systems. In the current International Chronostratigraphic Chart(ICC), 65 GSSPs have been erected in the Phanerozoic Eonothem, and one has yet been erected in the Precambrian Eonothem. Based on the progress of research on stratigraphy especially that from its subcommissions, the ICS is constantly revising the ICC, and will publish a new International Stratigraphic Guide in 2020. After continual efforts and broad international cooperation of Chinese stratigraphers, 10 GSSPs within the Phanerozoic Eonothem have been approved and ratified to erect in China by the ICS and IUGS. To establish the standards for stratigraphic division and correlation of China, with the support from the Ministry of Science and Technology, the National Natural Science Foundation of China and the China Geological Survey, Chinese stratigraphers have carried out research on the establishment of Stages in China. A total of 102 stages have been defined in the "Regional Chronostratigraphic Chart of China(geologic time)", in which 59 stages were studied in depth. In 2014, the "Stratigraphic Chart of China" was compiled, with the essential contents as follows: the correlation between international chronostratigraphy and regional chronostratigraphy of China(geologic time), the distributive status of lithostratigraphy, the characteristics of geological ages, the biostratigraphic sequence, the magnetostratigraphy, the geological events and eustatic sea-level change during every geological stage. The "Stratigraphical Guide of China and its Explanation(2014)" was also published. Chinese stratigraphers have paid much attention to stratigraphic research in south China, northeast China, north China and northwest China and they have made great achievements in special research on stratigraphy, based on the 1:1000000, 1:250000, 1:200000 and 1:50000 regional geological survey projects. Manifold new stratigraphic units were discovered and established by the regional geological surveys, which are helpful to improve the regional chronostratigraphic series of China. On the strength of the investigation in coastal and offshore areas, the status of marine strata in China has been expounded. According to the developing situation of international stratigraphy and the characteristics of Chinese stratigraphic work, the contrast relation between regional stratigraphic units of China and GSSPs will be established in the future, which will improve the application value of GSSPs and the standard of regional stratigraphic division and correlation. In addition, the study of stratigraphy of the Precambrian, terrestrial basins and orogenic belts will be strengthened, the Stratigraphic Chart of China will be improved, the typical stratigraphic sections in China will be protected and the applied study of stratigraphy in the fields of oil and gas, solid minerals, etc. will be promoted. On the ground of these actions, stratigraphic research will continue to play a great role in the social and economic development of China. 相似文献
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ZHANG Daolai LIU N YIN Ping ZHU Zhigang LU Jingfang LIN Xuehui ZHANG Yuanyuan MENG Xianwei 《《地质学报》英文版》2016,90(5):1926-1926
正Objective Located at the interface of terrestrial and marine ecosystems,mangroves are particularly sensitive to environmental changes.They provide a sedimentary sink for organic carbon,whereby core samples could provide detailed records of mangrove evolution.Human induced,rapid environmental changes in recent years require a better understanding of the mangrove ecosystems evolution in the past,by reconstructing the past mangrove 相似文献
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东北地区中尺度对流复合体的卫星云图特征 总被引:5,自引:0,他引:5
通过10年(1983-1992年)卫星云图资料的分析,综合归纳了东北地区中尺度对流复合体(NMCC)的基本特征及其发展演变过程,由于受地理条件的影响,NMCC与美国大平原以及我国西北和华北平原上的MCC有明显差别,作为一类特殊的对流性天气系统,NMCC与一般中尺度对流云图特征有明显差异。 相似文献
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热带和热带外海表温度异常与低空环流特征比较 总被引:9,自引:7,他引:9
利用旋转主分量方法(RPC),在对西太平洋和印度洋1980年1月至1988年9月共105个月的月平均海表温度(SST)进行分析的基础上,提取热带模及高纬模两种SST异常(SSTA)分布。再通过分析同期850hPa,各气象要素在该两模上的投影,比较低层大气与不同纬度上SSTA相联系的异常特征。结果表明,无论是热带还是热带外地区,暖性SSTA上空均有正的水汽异常及平均流场对月平均水汽输送的异常辐合。两地区SSTA上空850hPa月平均异常的最重要差异表现在流场、高度场及温度场上。热带正SSTA上方850hPa位势高度及温度均为负距平,流场呈Gill型的气旋式异常环流。热带外正SSTA上方850hPa高度及温度均为正距平,流场则呈反气旋式异常环流。分析表明,高纬度的这种异常特征主要是由于中高纬度大气的地转性和斜压性较强所致。 相似文献
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镇江市古运河边岸滑坡干扰了城市交通、航运和河道整治工程的正常运行。本文研究了城市边岸的工程环境、滑坡形态、特有的城市地质环境恶化所诱发的边岸破坏机制及其稳定性,它对我同城市水陆交通发展所导致的斜坡地质灾害及其治理有实用价值。 相似文献