准噶尔盆地北缘石炭系烃源岩元素特征及其环境意义

沉积岩中微量元素蕴含丰富的古环境信息,包括古水体盐度、古生产力、氧化还原性等,通过微量元素特征可以有助于评价源岩生油气潜力。利用野外样品的微量元素数据开展了准噶尔盆地北缘石炭系烃源岩沉积环境分析,石炭系样品Mn元素富集反映了强烈的火山作用对水体的影响;B、Sr、Ba等反映水体咸度的元素显示水体为弱咸水~淡水,并计算了古水体盐度:0.32‰~7.46/3.17‰,说明水体环境开放,海水受淡水改造作用强烈;V、Ni、U、Mo等氧化还原敏感指标反映当时水体处于弱还原环境,通过生源Ba重建了石炭纪古生产力。早石炭世相对于晚石炭世水体更咸,还原程度更高,古生产力较高,具有形成较高丰度烃源岩的潜力。     

δ~(13)C_(carb) and Ce_(anom) excursions in the post-glacial Neoproterozoic and Early Cambrian interval in Guizhou, South China

Inordertounderstand paleoceanographicre spondstotheevolutionofearlymetazoans ,δ13Ccarbvariationsinthepost glacialNeoproterozoicandtheEarlyCambrianhavebeeninvestigatedintheYangtzeplatform ,wheremajoreventsofearlymetazoansaremuchmorecompletelyrecordedcomparedtoelse whereintheworld[1～ 4 ] .Thefirstδ13Ccarb profilewasreportedbyLambertetal.[1] fromtheDoushan tuoandDengyingFormationsintheYangtzeGorges .But ,theirδ13Ccarb valuesfromtheDoushantuoFor mationarewidelyvariable ,mostlikelyduetoea…     

背越式跳高的大敌──过早倒体

过早倒体是背越式跳高教学训练中带有系普遍性而又难以改正的错误动作之一，它直接影响到技术的掌握和运动成绩的提高。对其错误动作产生的主要因素进行分析，以期对教学训练有所益处。     

花岗岩类岩石

区内出露４个花岗岩体：（１）辉山花岗岩；（２）鹊山花岗岩；（３）高陵花岗岩；（４）朵山花岗岩。其中辉山花岗岩为作者发现。通过岩石特征、岩石化学成分，Ｒｂ—Ｓｒ同位素年龄测定１７０Ｍａ±１０，辉山花岗岩具重熔花岗岩特点，是以胶东群为基体的壳源重熔型花岗岩，以底辟的方式上升为原地及半原地型花岗岩，鹊山花岗岩中存在着大量交代残留体及稀土元素含量及分配型式特点类似交代花岗岩。     

北宋初期诗学理论中的儒家思想

北宋初期,柳开、石介、王禹偁等人掀起了一场轰轰烈烈的诗文革新运动,他们提出了鲜明的文学理论并积极从事文学批评或文学创作实践活动,虽然他们的观点不尽相同,但对“道”的提倡是他们共同的主张,使北宋初期诗学理论中弥漫着浓厚的儒学思想,为程朱理学的兴起和儒家诗教原则的成熟准备了丰厚的话语资源。     

网络环境下研究院所文献资料室发展之路——以贵州省烟草科学研究所为例

介绍了建立《中国烟草早期文献数据库及网上展览厅》系统平台的背景及意义，阐述了该系统平台的结构与功能，对后继利用《中国烟草早期文献数据库及网上展览厅》的系统平台为读者提供主动的、个性化的服务进行了一些思考，探讨了网络环境下研究院所文献资料室未来的发展之路。     

Speciation of the genus Arthricocephalus Bergeron, 1899 (Trilobita) from the late Early Cambrian and its stratigraphic significance

The genus Arthricocephalus Bergeron, 1899 is revised, and Halipanktos Balker & Peel, 1997 is suggested here as a senior synonym. The subgenus Arthricocephalus (Arthricocephalites) Chien & Lin in Lu et al., 1974 is considered as a separate genus. Of the 20 previously assigned species of Arthricocephalus (Arthricocephalus) Bergeron, 1899, Arthricocephalus (Arthricocephalites) Chien & Lin in Lu et al., 1974, Arthricocephalus (Euarthricocephalus) Ju, 1983 are lumped into eight species. The speciation trend of Arthricocephalus and Arthricocephalites is demonstrated based on their stratigraphic occurrences. It not only enhances the resolution of the biostatigraphic zonation in the uppermost Lower Cambrian, but also represents a potential candidate to define the Duyunian stage. The base of the stage is suggested at the first appearance datum (FAD) of Arthricocephalus chauveaui Bergeron, 1899 within the evolutionary lineage from Ar. jiangkouensis Yin in Yin & Li,1978 to Ar. chauveaui in a global scale.     

丙硫咪唑早期和重复治疗猪细颈囊尾幼病及增重试验

采用丙硫咪唑粉剂按90mg/kg 剂量间隔48小时三次口服投药治疗早期感染细颈囊尾蚴猪(感染30日龄),结果表明是安全、有效的,驱(杀)虫率高达99.7%,死虫完全吸收,与对照组比较,治疗组日增重和屠宰率均有明显提高(P<0.01),可进行扩大治疗试验.     

准噶尔盆地石炭系火山岩储层主控因素分析

通过对准噶尔盆地石炭系火山岩油气藏岩芯的详细观察以及对储层岩石物性数据的统计分析,认为构造运动、岩性与岩相、风化淋滤作用是控制准噶尔盆地石炭系火山岩储层的主要因素。火山岩储集空间类型分为原生裂缝、原生孔隙、次生裂缝、次生孔隙四类。储层的渗流能力主要由裂缝决定。风化壳是准噶尔盆地石炭系火山岩储层的主要类型。优质储层主要分布在风化壳顶面以下250 m距离以内,其中环坳陷分布的古隆起部位更为有利。距离风化壳顶面越远,孔隙和裂缝充填程度越高,火山岩储集性能越差。     

When horsetails became giants

Horsetails arose in the Late Devonian,evolved a greater diversity and forming fast growing bamboo-like thickets in the Carboniferous lowland swamp forest ecosystems.However,the diversity of this group drastically declined during the Permian while the climate became more dynamic and arid.Today only a single surviving genus exists,the herbaceous Equisetum.Here we report an exceptional large horsetail tree from the Early Permian Petrified Forest of Chemnitz.This fossil horsetail tree is assigned to Arthropitys bistriata (Cotta) Goeppert.It is 15 m high and over 25 cm in diameter,with thick wood and at least 3 orders of woody branching system formed a big canopy,and is morphologically very comparable with the living woody higher plants.This suggests that the plasticity mechanism of Permian calamitaleans enabled novel growth strategies when they competed with the rising gymnosperms during the environmental changes.