《人间词话》的词人论之词学指向

王国维在《人间词话》中评价了众多词人,推尊五代、北宋词人,而对南宋词人多所贬抑。《人间词话》的词人论背后隐含着王氏的词学观:他批评姜夔是指向浙西词派的词学理论,批评吴文英是指向晚清四大家的词学理论。在王氏对清代主流词论的批评中体现着他鲜明的词学自觉意识、创新精神和明确的现实指向。     

Early Paleozoic granite in Nujiang River of northwest Yunnan in southwestern China and its tectonic implications

The Nujiang region along the China-Burma border in the western Yunnan has received a great deal of attention and has been considered to be the important channel of southeastward escape of the Tibetan Plateau[1-4]. This channel is bordered by the Red River-Ailao Mountain left-literal strick-slip fault in the east and Gaoligong- Sagaing right-literal strick-slip fault in the west[5-7]. Within this channel, it is still not clear to which tectonic     

Palaeoproterozoic Khondalite Belt in the western North China Craton： New evidence from SHRIMP datin8 and Hf isotope composition of zircons from metamorphic rocks in the Bayan Ui-Helan Mountains area

Zircom U-Pb age and Hf isotope analyses were made on gneissic granite and garnet-mica two-feldspar gneiss from the Helanshan Group in the Bayan Ul-Helan Mountains area, the western block of the North China Craton (NCC). Zircons from the gneissic granite commonly show core-mantle-rim structures, with magmatic core, metamorphic mantle and rim having ages of 2323±20 Ma, 1923±28 Ma and 1856±12 Ma, respectively. The core, mantle and rim show similar Hf isotope compositions, with single-stage depleted mantle model ages (TDM1) of 2455 to 2655 Ma (19 analyses). Most of the detrital zircons from the garnet-mica two-feldspar paragneiss have a concentrated U-Pb age distribution, with a weighted mean 207Pb/206Pb age of 1978±17 Ma. A few detrital zircons are older (2871 to 2469 Ma). The age for metamorphic overgrown rim was not determined because of strong Pb loss due to their high U content. The zircons show large variation in Hf isotope composition, with TDM1 ages of 1999 to 3047 Ma. In com- bination with previous studies, the main conclusions are as follows: (1) protolith of the khondalite se- ries in the Helanshan Group formed during Palaeoproterozoic rather than the Archaean as previously considered; (2) The results lend support to the contention that there is a huge Palaeoproterozoic Khondalite (metasedimentary) Belt between the Yinshan Mountains Block and the Ordos Block in the Western Block of NCC; (3) The widely-distributed bodies of early Palaeoproterozoic orthogneisses in the Khondalite Belt might be one of the important sources for detritus material in the khondalite series; (4) Collision between the Yinshan Block, the Ordos Block and the Eastern Block occurred in the same tectonothermal event of late Palaeoproterozoic, resulting in the final assembly of the NCC.     

地球生命过程中的一个新概念—奥陶纪生物大辐射

奥陶纪生物大辐射是古生代演化动物群宏演化进程中的第一次辐射,也是古生代演化动物群形成及早期演化过程中最重要的事件.大辐射历经4千余万年,包括长期的、渐变的过程和数次高潮(多样性峰值).华南实例分析显示,大辐射不仅表现为分类单元多样性的快速增加,还表现为群落生态多样性的高度复杂化,特定动物群的形成和快速分异,以及对寒武纪动物群延续分子的替换.大辐射的差异性普遍存在,是辐射的重要特征之一.     

作为文化实践的读书——以李慈铭《越缦堂日记》为中心

以<越缦堂日记>为基本材料,通过李慈铭的读书生活史,可以考察一个清季知识分子在知识失范的时代,如何通过读书来进行文化实践,以冀重建知识的规范.在日常读书生活中,李慈铭对娱情性读书行为的克制、在读书行为上对儒学表象的追求,都反映了一种秩序化的要求:由书籍的秩序来改变社会的秩序,由精神构造来改变社会构造.     

自主创新与古生代油气田的发现

1984年在塔里木盆地部署的沙参2井实现了中国古生代海相油气田首次重大突破，成为我国油气勘探史上的重要里程碑，之后又发现多个古生代油气田及塔河大油田，并创立古生代海相成油理论。这一过程充分体现了自主创新的过程，对其进行较系统的总结，对当前和今后古生界油气勘探有重要指导意义。     

咸阳市区晚更新世黄土微结构特征及其环境意义

目的揭示咸阳市区晚更新世黄土的微结构特征,探讨黄土微结构特征与其形成环境的关系,为区域环境提供科学依据。方法应用粒度分析和扫描电子显微镜对咸阳市区晚更新世黄土．古土壤系列的微结构进行分析研究。结果粒度小于0．005 mm的黏粒级含量在黄土与古土壤中差异最大,S1古土壤高达39．7％,而L1黄土仅24％;S1古土壤黏粒中大量铁质黏粒胶膜呈流胶状出现并有次生伊利石的产出,结构密实;L1黄土微骨架颗粒相互支架,黏粒胶结物含量较少,胶结程度差,土质疏松。结论咸阳市区晚更新世S1古土壤形成在湿热的森林环境,L1黄土形成于干冷的草原环境,S0黑垆土形成于凉湿气候环境。     

晚奥陶世碳酸岩锶同位素(87Sr/86Sr)以及元素(Sr,Mn,Fe)特征的成岩效应(英文)

详细评估成岩作用对碳酸岩锶同位素组成以及元素含量的影响是应用其揭示古环境变化的重要前提。本文探究来自美国Monitor Range的一个晚奥陶世剖面碳酸岩⁸⁷Sr/⁸⁶的主要控制因素。结果显示,在生物带D.ornatus的中上部,⁸⁷Sr/⁸⁶从0.70794升高至0.70830,显著高于已发表的同时期样品的比值(～0.7079)。这一异常高的⁸⁷Sr/⁸⁶比值指示了后期、局部过程对研究剖面碳酸岩原始锶同位素信息的改变,因而不能代表同时期海水的锶同位素组成。另外,⁸⁷Sr/⁸⁶与成岩作用指标(Mn、Fe含量,Mn/Sr与Fe/Sr比值)呈显著的正相关关系,表明成岩蚀变是所测异常⁸⁷Sr/⁸⁶的主控因素。通过成岩流体-岩石反应的数值模型计算,再次证实所测的锶同位素以及元素数据可用成岩作用造成的碳酸岩化学组成变化进行很好的解释。本文结果表明,即使碳酸岩样品满足“[Sr]&g...     

赣东北登山群中新发现几丁虫化石及其意义

江西弋阳县祝家－登山村,前人定为晚元古代“登山群拔竹坑组”的标准剖面中,发现其中３个层位含有几丁虫化石,下部二个层位产？Ｃｏｎｏｃｈｉｔｉｎａ ｓｐ．和Ｃｙａｔｈｏｃｈｉｔｉｎａ ｓｐ．,上部化石层产？Ｃｏｎｏｃｈｉｔｉｎａ ｓｐ．和？Ｒｈａｂｄａｃｈｉｔｉｎａ ｓｐ．．表明“登山群拔竹坑组”的时代应属于早古生代。这一新的发现：对重新厘定华南“板溪群”时代和华南大地构造格局及其演化史有重要意义。