藏北羌塘盆地角木茶卡地区下二叠统展金组烃源岩特征及意义   总被引：1，自引：0，他引：1       下载免费PDF全文

陈文彬  付修根  占王忠  冯兴雷  宋春彦  曾胜强 《沉积与特提斯地质》2015,(1):43-49

在羌塘盆地中央隆起带附近角木茶卡南发现一套下二叠统展金组含凝灰质烃源岩。依据露头样品和测试数据,从有机质丰度、有机质类型及成熟度方面对这套烃源岩特征进行了研究。研究结果表明,展金组烃源岩有机碳含量在0.35%~0.98%之间,达到了烃源岩标准,且大部分接近中等烃源岩标准;通过干酪根镜鉴、干酪根元素分析、干酪根碳同位素等结果分析,其有机质类型主要为Ⅱ2-Ⅲ型;有机质镜质组反射率Ro为1.54%~1.59%,岩石热解峰温Tmax介于467~530℃之间,干酪根腐泥组颜色为棕黄色,显示有机质热演化处在高成熟阶段。研究结果显示该套烃源岩具有较好生烃潜力,在以后的勘探中要予以重视。  相似文献   

陕南凤凰岭南缘变质镁铁质—超镁铁质侵入岩矿物学特征——对Fe-Ti成矿作用的指示     

黄杰  覃小锋  王宗起  张英利  杨文  朱安汉  宋炯 《地质通报》2015,(Z1):508-522

陕南凤凰岭南缘变质镁铁质—超镁铁质侵入岩为富含Fe、Ti等有用元素的含矿岩体。利用岩石地球化学方法、偏光显微镜和电子探针技术对该区镁铁质—超镁铁质侵入岩的岩石学、地球化学和矿物学特征进行了研究,并对Fe-Ti氧化物的形成、富集进行了初步探讨,对成岩、成矿作用具有一定的参考意义。结果表明,成矿镁铁质—超镁铁质侵入岩与非成矿镁铁质—超镁铁质侵入岩为不同岩浆源区、同期岩浆作用的产物,镁铁质—超镁铁质侵入岩类的Fe-Ti矿化作用与初始岩浆的源岩之间具有密切关系。Fe-Ti氧化物主要以钛铁矿和榍石的形式存在,局部见少量金红石。化学成分上,钛铁矿具富锰贫镁特征,本区Fe-Ti氧化物的形成和富集过程经历了岩浆结晶分异阶段和热液蚀变阶段。  相似文献   

内蒙古额济纳旗西部ZK0-1井二叠系烃源岩特征及其意义   总被引：1，自引：0，他引：1  

金庆花  魏仙样  魏建设  宋博 《地质通报》2015,34(5):953-960

银额盆地以古生界为目的层的钻井极少,获得的钻井岩心更是十分有限。对银额盆地西部路北凸起带ZK0-1井揭示的地层岩性组合特征进行分析,在此基础上对下二叠统暗色泥岩层段岩心系统地采集烃源岩样品,并进行有机质丰度、干酪根类型、有机质成熟度等地球化学特征分析。结果表明,银额盆地路北凸起带二叠系烃源岩厚度大(单层厚度大于43m),有机质丰度高(平均有机碳含量为3.1%),为以Ⅱ型干酪根为主、低成熟—成熟演化阶段的良好烃源岩。通过与二叠系地表剖面烃源岩地球化学特征对比,探讨了风化作用对烃源岩评价指标的影响。  相似文献   

CAS FGOALS-g3 Model Datasets for the CMIP6 Scenario Model Intercomparison Project(ScenarioMIP)     

Ye PU  Hongbo LIU  Ruojing YAN  Hao YANG  Kun XIA  Yiyuan LI  Li DONG  Lijuan LI  He WANG  Yan NIE  Mirong SONG  Jinbo XIE  Shuwen ZHAO  Kangjun CHEN  Bin WANG  Jianghao LI  Ling ZUO 《大气科学进展》2020,37(10):1081-1092

This paper describes the datasets from the Scenario Model Intercomparison Project(ScenarioMIP) simulation experiments run with the Chinese Academy of Sciences Flexible Global Ocean–Atmosphere–Land System Model,GridPoint version 3(CAS FGOALS-g3). FGOALS-g3 is driven by eight shared socioeconomic pathways(SSPs) with different sets of future emission, concentration, and land-use scenarios. All Tier 1 and 2 experiments were carried out and were initialized using historical runs. A branch run method was used for the ensemble simulations. Model outputs were three-hourly, six-hourly, daily, and/or monthly mean values for the primary variables of the four component models. An evaluation and analysis of the simulations is also presented. The present results are expected to aid research into future climate change and socio-economic development.  相似文献   

中国地球气候系统模式的发展及其模拟和预估   总被引：4，自引：0，他引：4  

周天军  陈梓明  邹立维  陈晓龙  俞永强  王斌  包庆  鲍颖  曹剑  何编  胡帅  李立娟  李建  林岩銮  马利斌  乔方利  容新尧  宋振亚  唐彦丽  吴波  吴统文  辛晓歌  张贺  张明华 《气象学报》2020,78(3):332-350

地球气候系统模式是开展多学科、多圈层集成研究的重要平台,其发展是国际地学领域特别是全球变化领域竞争的前沿。中国的地球气候系统模式研发工作始于20世纪80年代,最近10年得到快速发展。研发格局上已经形成中国科学院、有关部委和高校三足鼎立的局面。文中在简要回顾中国地球气候系统模式早期发展历史的基础上,总结了中国参加第6次耦合模式比较计划的9个地球气候系统模式的技术特点,初步评估了中国4个模式对全球和东亚气候模拟的基本性能,分析了其在4种共享社会经济路径情景下对全球降水与温度的预估变化及其与平衡态气候敏感度的联系。最后,结合国际态势,从发展的角度提出未来中国气候模式研发工作需要加强的8个方向。   相似文献   

2019/2020年冬季我国暖湿气候特征及成因分析     

赵俊虎  宋文玲  柯宗建 《气象》2020,46(7):982-993

2019/2020年冬季,我国大部分地区气温显著偏高,降水异常偏多,气候总体表现为“暖湿”的异常特征。异常成因分析表明：2019/2020年东亚冬季风强度较常年同期偏弱,西伯利亚高压异常偏弱,季节内冬季风强度阶段性变化特征显著;北极极涡收缩于极地,强度偏强,AO为异常偏强的正位相,乌拉尔山阻塞高压活动偏弱,东亚槽偏弱,欧亚中高纬以纬向环流为主;西太平洋副热带高压强度偏强、位置偏西偏北,印缅槽阶段性活跃,二者有利于太平洋和印度洋水汽向我国输送。受北半球环流异常的影响,我国冬季出现了“暖湿”的异常特征。进一步对东亚冬季风偏弱的可能原因分析表明：2019年秋冬季赤道中太平洋暖海温发展,2019年10月至2020年1月Ni〖AKn~D〗o3.4指数均大于0.5℃,这种类中部型El Ni〖AKn~D〗o海温异常有利于激发偏强、偏北的西北太平洋反气旋,进而抑制了东亚冬季风的发展和南下;此外,冬季北半球极涡收缩于极地,强度偏强,AO持续异常偏强的正位相,均不利于乌拉尔山阻塞高压的发展,且东亚大槽明显偏弱,共同导致了欧亚中高纬地区以纬向环流为主,东亚冬季风偏弱。  相似文献   

The Relationship Between Abnormal Meiyu and Medium-Term Scale Wave Perturbation Energy Propagation Along the East Asian Subtropical Westerly Jet     

金荣花  杨宁  孙晓晴 《热带气象学报(英文版)》2020,26(2):125-136

The East Asian subtropical westerly jet(EASWJ) is one of the most important factors modulating the Meiyu rainfall in the Yangtze-Huaihe River Basin, China. This article analyzed periods of the medium-term EASWJ variation,wave packet distribution and energy propagation of Rossby waves along the EASWJ during Meiyu season, and investigated their possible influence on abnormal Meiyu rain. The results showed that during the medium-term scale atmospheric dynamic process, the evolution of the EASWJ in Meiyu season was mainly characterized by the changes of3-8 d synoptic-scale and 10-15 d low-frequency Rossby waves. The strong perturbation wave packet and energy propagation of the 3-8 d synoptic-scale and 10-15 d low-frequency Rossby waves are mostly concentrated in the East Asian region of 90°-150°E, where the two wave trains of perturbation wave packets and wave-activity flux divergence coexist in zonal and meridional directions, and converge on the EASWJ. Besides, the wave trains of perturbation wave packet and wave-activity flux divergence in wet Meiyu years are more systematically westward than those in dry Meiyu years, and they are shown in the inverse phases between each other. In wet(dry) Meiyu year, the perturbation wave packet high-value area of the 10-15 d low-frequency variability is located between the Aral Sea and the Lake Balkhash(in the northeastern part of China), while over eastern China the wave-activity flux is convergent and strong(divergent and weak), and the high-level jets are strong and southward(weak and northward). Because of the coupling of high and low level atmosphere and high-level strong(weak) divergence on the south side of the jet over the Yangtze-Huaihe River Basin, the low-level southwest wind and vertically ascending motion are strengthened(weakened), which is(is not)conducive to precipitation increase in the Yangtze-Huaihe River Basin. These findings would help to better understand the impact mechanisms of the EASWJ activities on abnormal Meiyu from the perspective of medium-term scale Rossby wave energy propagation.  相似文献   

天津市北辰区设施农业温光气候资源变化分析   总被引：1，自引：0，他引：1  

赵淑兰  李春  张绍祥 《气象与环境科学》2013,36(1):32-35

利用北辰区气象站近40 a(1971-2010年)冬季的气象观测资料,对影响设施农业生产的温光气候资源和主要气象灾害变化进行了分析.结果认为:温度资源变化利于设施农业生产,光照资源的变化则与之相反,低温、连阴天等农业气象灾害对设施农业的影响加剧,尤以中度和重度灾害的发生明显,北辰区的这一变化对研究我国北方大城市郊区设施农业生产的气候资源变化具有借鉴意义.  相似文献   

Observational Zonal Mean Flow Anomalies: Vacillation or Poleward Propagation?          下载免费PDF全文

SONG Jie 《大气和海洋科学快报》2013,6(1):1-7

North-south displacements and meridional vacillations of the eddy-driven jet are widely accepted as the dominant cause of variability of the observational zonal-mean zonal wind anomalies(denoted [u]’).In this study,a new idea regarding the primary variability of the observational [u]’ in the middle latitude troposphere is presented.It is hypothesized that there are two different classes of primary variability of the observational [u]’:the poleward propagation of the [u]’(abbreviated as PP) and meridional vacillations.To validate this hypothesis,one-point correlation maps of [u]’ at 200-hPa during the boreal cold season(November-April) of every year from 1957-2002 are used as a criterion.Twelve PP years,in which the PP events are dominant in the variability of [u]’,and 15 no_PP years,in which the PP events are recessive and the meridional vacillations are dominant in the variability of [u]’,are examined.The results show that the variabilities of [u]’ are different in the chosen PP and no_PP years.In the PP years,the PP events dominate the variability of [u]’;however,the meridional vacillations are prevalent in the no_PP years.  相似文献   

世界各国静止气象卫星发展综述     

何兴伟  冯小虎  韩琦  康宁  郭强  彭艺 《气象科学进展》2020,10(1):22-29,41

首先阐述了美国、欧洲气象卫星组织(EUMETSAT)、日本静止气象卫星的发展历史,从自旋稳定到三轴稳定,从单一载荷到多载荷并行工作,新一代的静止气象卫星的时间、空间和光谱分辨率都大幅提高,然后重点介绍了我国静止气象卫星风云二号和风云四号,相比于自旋稳定的风云二号气象卫星,风云四号卫星的功能和性能实现了跨越式的发展,接着简单介绍了俄罗斯、印度和韩国等其他国家静止气象卫星的发展状况,最后总结了不同时期各国静止气象卫星的发展特点,这对我国后续静止气象卫星的规划和研制有重要参考意义。  相似文献