泥河湾盆地井儿洼剖面磁性地层学初步研究

泥河湾盆地井儿洼剖面古地磁测年结果全部为正向极性,剖面顶面下3.08m处白垩质粘土层铀系不平衡法测年结果为(50600±6700)aBP,据此确定其磁性地层学时代为布容正向极性时．剖面底部未出露B/M界限,说明地层时代晚于78万aBP.依据磁性地层学特征,井儿洼剖面可与虎头梁剖面对比,并能与红崖南沟、大道坡、郝家台等剖面的上部或顶部对比,属泥河湾组Ⅲ段．井儿洼、虎头梁剖面下部的石膏沉积晚于红崖、铺路等剖面下部的石膏沉积,它们分属不同的石膏沉积旋回.井儿洼剖面出露的湖相地层记录了古湖的消亡过程,是研究泥河湾古湖晚期历史的理想场所.     

新建郑州—西安高速铁路黄土地层及其特征

目的 对郑州至西安高速铁路段黄土地层及其组构特征和成因进行综合调查分析.方法 结合工程地质勘察,选择沿线12个典型黄土剖面进行详细剖析和磁性测量,并运用室内同类研究资料和区域地层特征,对其进行岩石地层学和磁性地层学对比研究,进而进行地层划分,通过古地磁测年给定了黄土岩石学地层单位比较准确的地质年龄和时代.最后对该线不同时代黄土地层的成因进行讨论.结果 本高速铁路沿线黄土主要为第四纪中更新世和晚更新世以来,以风为主的综合成因而形成.结论 该线黄土成因时代的确定,为研究黄土振陷、液化、滑移及提出切实可行的地基处理措施奠定了良好基础.     

湖北建始早期人类及巨猿年代学研究

产出地层、磁性地层学和哺乳动物化石的对比研究表明,产出地层处在极性年表松山反极性时的留尼旺亚时到奥都威亚时之间,早期人类化石和部分石器产出层位的时代应早于2.15Ma,与巫山龙骨坡人类化石地点接近.     

丹霞盆地红层时代的初探——古地磁研究的新证据

该文叙述了丹霞盆地红层的古地磁学研究工作的全部过程。通过对岩石剩余磁性的测量及数据分析,揭示了丹霞红层下部存在着一个长间距的正极性带,这可以跟地磁极性年表中的“白垩纪静磁带”相对比;上部则以反极性为主。结合同位素年龄测量资料,对照地磁极性年表,对丹霞盆地红层的时代归属得出以下认识:丹霞红层下部长坝组最老地层的时代为早白垩世早期,上部丹霞群最年轻地层为晚白垩世中期。     

吐鲁番-哈密盆地中新生代热历史:磷灰石裂变径迹证据

对吐鲁番-哈密盆地中部连木沁剖面和南北山前带的9个样品进行磷灰石裂变径迹测年发现,7个侏罗系样品的中心年龄皆小于地层沉积年龄,而2个白垩系样品的中心年龄则大于或等于地层沉积年龄,表明侏罗系样品经历过退火或部分退火,而白垩系样品则未退火.进一步的热模拟研究表明,在晚白垩世120～100Ma,吐哈盆地发生构造抬升,地层快速冷却剥露,岩层在新生代二次埋藏加热,至10～8Ma又再次剥露.     

渤海湾盆地饶阳凹陷早渐新世高精度年代地层格架建立及意义

渤海湾盆地饶阳凹陷"断裂发育"和"多隆多洼"的特点限制了传统测年方法的应用,层序边界绝对地质年代未曾考究。基于旋回地层学和层序地层学理论,选取标准井进行米兰科维奇旋回分析,建立天文年代标尺,计算层序边界绝对地质年龄。以标准井为中心建立等时地层格架,讨论沉积相分布与沉积速率的耦合关系。结果表明:饶阳凹陷沙一段地层沉积时间为2.78 Ma,6个四级气候层序自下而上分别历时320、430、1 000、410、400和220 ka,平均沉积速率约为150 m/Ma,湖盆内不同沉积环境下沉积速率差异显著。旋回地层学和层序地层学的有机结合是陆相湖盆全息地层学研究的必要手段。     

洛阳二里头遗址南沉积剖面的粒度和磁化率分析

洛阳盆地内二里头遗址南沉积剖面位于遗址所在二级阶地的前缘,属于河流堆积。对剖面的沉积物样品做了光释光测年及磁化率、粒度分析。结果表明:剖面沉积年代大致在2000~5000 aBP之间。剖面下部(113~123 cm)沉积物粒度较细,磁化率偏高,粒度曲线反映水流较弱的泛滥平原沉积环境,属河漫滩堆积;中部(90~113 cm)粒度较粗,磁化率较低,粒度曲线反映水动力较强的边滩–漫滩沉积环境,属河床边滩堆积;上部(0~90 cm)粒度变细,磁化率升高,粒度曲线反映水动力条件较弱的泛滥平原沉积环境,属河漫滩堆积。其中沿水平方向可见剖面中部的河床边滩堆积直接覆盖在二级阶地顶面的龙山时期灰坑之上,由此可以确认剖面中部地层记录了一场漫上了河流阶地的特大洪水事件,这一记录与孢粉分析得到的气候变化过程具有明显的相关性。4000 aBP前后异常洪水的出现和大洪水前后河流过程的变化,可能是对4200 aBP全球性气候异常事件的区域响应,对我国最早的都邑——二里头城址的选址有重要的影响。     

新疆塔里木盆地晚奥陶世-早石炭世

首次系统应用化学-生物地层学对长期遗留的、严重阻碍了油气勘探开发步伐的塔里木盆地重大疑难地层问题:晚奥陶世-志留纪-泥盆纪-早石炭世地层划分对比和东河砂岩时代等进行了综合研究,厘定了几条重要的相关地层界线,并将东河砂岩的时代确定为泥盆纪晚泥盆世弗拉斯期.这些研究成果表明,化学-生物地层学对高分辨率地层划分对比、尤其是对在化石缺乏地区和层段进行地层划分对比工作有重要的意义和实用价值.     

网纹化对皖南红土特征剩磁的影响

皖南的红土是形成于亚热带的风尘沉积,建立红土的年代框架主要依据磁性地层,但红土磁性地层的可靠性却存在争议.为查明风化作用对古地磁特征剩磁的影响,我们选择了安徽宣城官塘的红土剖面进行了高分辨率的磁性地层研究.结果显示,均质红土层的特征剩磁比较稳定,而网纹红土层的特征剩磁方向不稳定,极性变化频繁,难以准确划分出极性界线.岩石磁学的研究表明,均质红土与网纹红土的载磁矿物种类与含量不完全相同,原因在于沉积后强烈的网纹化作用,一方面使得原生碎屑磁性矿物发生转变,含量明显下降,另一方面形成了较多的次生磁性矿物,碎屑剩磁因此受到化学剩磁的严重干扰,导致常规方法获得的网纹红土的特征剩磁方向不可靠.据此我们认为在皖南网纹红土层内确定的B/M界线需要慎重对待.这一发现对其它南方网纹红土的古地磁测年也有参考意义.     

藏南林西剖面晚侏罗世—早白垩世层序地层分析

西藏南部出露有良好的侏罗纪 白垩纪地层,通过实测浪卡子县林西晚侏罗世-早白垩世地层剖面,并依据层序地层学原理,对剖面进行了层序地层分析,识别出3个层序.林西剖面主要由维美组、桑秀组和甲不拉组地层构成.晚侏罗世维美组可识别出1个层序,属于低水位体系域的滨浅海沉积.早白垩世桑秀组可以识别出1个层序,为Ⅱ型层序,桑秀组底部为次深海沉积,属海侵体系域;中部为滨浅海沉积,为低水位体系域;上部为火山陆隆,为深海体系域.甲不拉组的石英砂岩属于新层序的开始,为海侵位体系域.晚侏罗世层序地层总体上表现为海退的进积序列,反映了特提斯-喜马拉雅海区持续收缩和海平面下降的过程;早白垩世层序地层总体表现为海进的退积序列,反映了特提斯洋壳的扩张阶段.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.