Newly discovered Palaeolithic artefacts from loess deposits and their ages in Lantian,central China

Eight new Palaeolithic open-air sites were identified and 770 stone artefacts were collected from 2009 to 2011 in the Lantian area of the Bahe River valley, central China. Because the famous Homo erectus fossils were unearthed at the Gongwangling and Chenjiawo localities, and more than 30 Palaeolithic open-air sites were investigated in the 1960s in this region, the catchment of Bahe River is regarded as one of the most important hominin sites from the late early Pleistocene to the middle Pleistocene. These eight newly discovered open-air sites are located at the second(n = 6), third(n = 1) or higher terraces(n = 1) of the Bahe River. The Diaozhai section on the second terrace was sampled in detail. Two samples were collected for optically stimulated luminescence dating(OSL). The OSL results suggest that a buried lithic artefact layer at the Diaozhai site spans approximately 70–30 ka. The lithic assemblage analysis suggests that the stone artefacts were made of local pebbles/cobbles such as greywacke, quartz, sandstone and igneous rocks. The main percussion techniques that were used were direct hard hammer percussion and bi-polar techniques. The lithic artefacts comprise hammer stones, cores, flakes, retouched tools and flaking debris. Acheulian-type large cutting tools(LCTs) such as hand-axes, picks and cleavers were indentified in the Lantian region as well. This is the first time Acheulian-type LCTs from the late Pleistocene have been identified in this region. This study distinguishes age gaps between Western world and East Asian Acheulian-type tools.     

滇西兰坪盆地上新世古环境分析

在对滇西兰坪盆地上新世三营组化石(孢粉、树叶)和沉积分析基础上,探讨了滇西兰坪盆地上新世时期的古环境特征。三营组(N2s)沉积相主要为湖泊相,次为扇三角洲相;在纵向上主体表现为湖泊相—扇三角洲相—湖泊相—扇三角洲相的相序变化。孢粉和植物叶化石研究结果显示高山栎植物为优势种,采用共存因子分析法定量证实兰坪盆地上新世古气候总体凉爽湿润,为山地亚热带季风气候,植被具有明显垂直分带特征,与现在云南地区的植被相似。结合青藏高原隆升及周边气候环境变化推测上新世末期,青藏高原可能经历了一次强烈的构造隆升运动,局部高度可能在2 200~2 500 m。     

右江盆地都安组白云岩成因及其地质意义

以都结剖面为例,逐步开展沉积环境分析和岩石学分析方面的工作,旨在进一步提高右江盆地下石炭统都安组白云岩的研究程度.该白云岩形成于同生、准同生阶段的萨布哈模式,并在后生埋藏阶段受到埋藏白云石化作用的改造.都安组白云岩地层、下伏潮间带黏结灰岩地层及浅水潮下带颗粒-泥粒灰岩地层共同构成环潮坪型碳酸盐岩米级旋回,为晚古生代冰川...     

华南武夷山早古生代构造事件的^40Ar／^39Ar同位素年龄研究

华南武夷山地区广泛发育一套强烈韧性剪切变形的中、高级变质岩系,其新生矿物白云母非常普遍.对武夷山南麓政和县蝴碟街大理岩和北麓弋阳县慈竹片麻状花岗岩中的动力变质矿物白云母进行40Ar/39Ar法同位素测年,分别获得391±3Ma和421±8Ma的坪年龄值,以及385±5Ma和422±6Ma的等时线年龄值,时代相当于志留纪末到泥盆纪初.结合地质证据,认为武夷山地区存在过一期早古生代沉积作用和早古生代末期的构造热事件.至少有一期的强烈韧性剪切变形和糜棱岩化作用是该构造事件所导致     

晚清“今文学”的衰落与诗学知识范式的嬗变

诗学的演变首先都是基于其主要知识范式的,当"今文学"的权威和神圣光环还没有退却前,它仍旧是晚清"今文学"家诗学存在及其发展所必须遵循的金科玉律。晚清"今文学"出现了衰落,并由此造成了"今文学"诗学话语的现实困境以及诗学美学话语的呈现,进而实现了诗学经学话语向诗学美学的裂变,最终导致了晚清诗学知识范式的嬗变。至此,中国诗学也由传统开始彻底走向了近代。     

东北地区晚石炭世岩相古地理研究

利用野外地质剖面、关键钻井剖面和区域地质资料,在地层划分与对比、构造格局以及早石炭世研究的基础上,从点—线—面的沉积相分析入手,将晚石炭世的巴什基尔期—格舍尔期作为一个编图单元进行岩相古地理编图,恢复了东北地区晚石炭世的岩相古地理面貌。研究表明,东北地区晚石炭世主要发育浅海陆棚沉积体系、台地沉积体系、障壁海岸沉积体系、河流沉积体系及湖泊沉积体系;研究区存在漠河及佳木斯两个主要的古陆区,物源区碎屑物质供应丰富,其余地区以海相沉积为主,仅北侧黑河-松辽地区和东部饶河地区尚存河流相沉积区。在前人研究成果基础上,融合近年来东北地区地层精细划分和对比、构造演化的新认识,形成了一套更加精细的岩相古地理图。     

中国东南部晚中生代伸展应力体制的岩石学标志

在中国东南部晚中生代时期（J2－K2），发育着大规模岩墙群、广泛的岩浆混合作用（包括侵入杂岩中的岩浆混合和火山岩中的复合岩流／双峰式火山岩）、大范围玄武岩浆的底侵、巨型链状火山岩带、晶洞花岗岩－A型花岗岩带、变质核杂岩，以及玄武岩的无斑隐晶－细粒结构和花岗岩的均匀块状结构。对它们的研究表明，它们形成于伸展应力体制，是伸展构造的岩石学标志，发生在晚中生代整个地质时期，并认为这一伸展构造由古太平洋库拉板块对欧亚板块的消减作用诱发。     

8 种杀菌剂防治马铃薯晚疫病的田间药效试验

8种不同杀菌剂对马铃薯晚疫病田间药效试验结果表明,50%施得益WP、60%双工福玛WP、25%瑞凡SC、80%大生M-45WP、30%富民一号SC 5种杀菌剂对马铃薯晚疫病的防效均在70%以上,以50%施得益WP防治效果最好,防效为87.65%。施用50%施得益WP和60%双工福玛WP后增产率极显著,挽回损失55.54%和47.44%。