Hybrid N-order Lagrangian Interpolation Eulerian?Lagrangian Method for Salinity Calculation

The Eulerian?Lagrangian method (ELM) has been used by many ocean models as the solution of the advection equation, but the numerical error caused by interpolation imposes restriction on its accuracy. In the present study, hybrid N-order Lagrangian interpolation ELM (LiELM) is put forward in which the N-order Lagrangian interpolation is used at first, then the lower order Lagrangian interpolation is applied in the points where the interpolation results are abnormally higher or lower. The calculation results of a step-shaped salinity advection model are analyzed, which show that higher order (N=3?8) LiELM can reduce the mean numerical error of salinity calculation, but the numerical oscillation error is still significant. Even number order LiELM makes larger numerical oscillation error than its adjacent odd number order LiELM. Hybrid N-order LiELM can remove numerical oscillation, and it significantly reduces the mean numerical error when N is even and the current is in fixed direction, while it makes less effect on mean numerical error when N is odd or the current direction changes periodically. Hybrid odd number order LiELM makes less mean numerical error than its adjacent even number order LiELM when the current is in the fixed direction, while the mean numerical error decreases as N increases when the current direction changes periodically, so odd number of N may be better for application. Among various types of Hybrid N-order LiELM, the scheme reducing N-order directly to 1st-order may be the optimal for synthetic selection of accuracy and computational efficiency.     

漠河盆地多年冻土区天然气水合物地球化学调查及远景评价

漠河盆地是我国冻土发育的主要地区之一,发育良好的天然气水合物成藏系统,具有天然气水合物形成的良好条件。为了圈定天然气水合物远景区,识别油气聚集体,判别天然气水合物成因,在漠河盆地冻土较发育地区开展了1∶5万天然气水合物地球化学资源调查。结果表明：(1)在森林沼泽景观区,顶空气和荧光光谱指标是天然气水合物勘查的主要指标,借鉴青海木里冻土区天然气水合物地球化学勘查成功的经验,结合AMT、地质等资料分析,元宝山凹陷是天然气水合物较为有利的远景区;(2)岩心样品甲烷碳同位素分析显示,烃类气体分异明显,浅层烃类气体基本为生物气,深部烃类气源主要为混合成因气,个别解吸气为微生物气和热解气;(3)试验性应用了分形-GIS技术,可以细致可靠地进行异常区范围划定,消除干扰因素,有效地圈定水合物远景区。     

A New Ootype of Dinosaur Egg (Faveoloolithidae: Duovallumoolithus shangdanensis oogen. et oosp. nov.) from the Late Cretaceous in the Shangdan Basin,Shaanxi Province,China

A new ootype collected from the Upper Cretaceous Lijiacun Formation in the Shangdan Basin, Shaanxi Province is described in this paper. Based on general external shape, size, eggshell thickness and honeycomb‐like eggshell microstructure, eggs are referable to the oofamily Faveoloolithidae. Compared with other members of Faveoloolithidae, specimens described in this paper show special characteristics: adjacent pores are usually separated by two eggshell units between which often develop interspaces; columnar eggshell units are relatively closely arranged in radial view. According to these characteristics, we erect a new oogenus and a new oospecies: Duovallumoolithus shangdanensis oogen. et oosp. nov. The new discovery expands the diversity of Faveoloolithidae.     

First Report of Zircon U‐Pb Ages from Lubei Cu‐Ni Sulfide Deposit in East Tianshan of Central Asian Orogenic Belt,NW China

正Objective The East Tianshan mafic-ultramafic rocks belt mainly produced in the eastern Jueluotage belt is an important part of the Central Asia Orogenic Belt(CAOB).The wellknown deposits including Huangshan,Huangshandong,Tulaergen,Hulu,Xiangshan were have been consecutively discovered in this belt(Duan Xingxing et al.,2016).The new discovery of the Lubei Cu-Ni sulfide deposit in recent     

Provenance Study of Fe–Ti Oxide Minerals in the Quaternary Sediments in Yichang Area and Its Implication of Formation Time of the Yangtze Three Gorges, China

The Three Gorges are considered to be critical to understand the formation of Yangtze River. Recent research results suggest that the Yangtze Three Gorges was created during the Quaternary but the exact time is debatable. Fe–Ti oxide minerals are seldom used to study sediment provenance, expecially using scanning electron microscopy(SEM), and energy dispersive spectrometer(EDS). In this study, the provenance of Quaternary sediments in Yichang area, which is located to the east of the Yangtze Three Gorges, was investigated by using SEM and EDS to research Fe–Ti oxides. The Panzhihua vanadium titanomagnetite and Emeishan basalt outcrop are located to the west of the Three Gorges. Further, the materials from them are observed in the Quaternary sediments of Yichang area. Fe–Ti oxide minerals from the Huangling granite are observed in the Yunchi and Shanxiyao Formations, which were formed before 0.75 Ma B.P., whereas Fe–Ti oxide minerals from the Huangling granite, Panzhihua vanadium titanomagnetite, and Emeishan basalt are observed in the riverbed and fifth-terrace sediments of the Yangtze River, which were formed after 0.73 Ma B.P.. Thus, we can infer that the Three Gorges formed after the deposition of the Shanxi Formation and before the fifth-terrace; i.e., 0.75–0.73 Ma B.P..     

上海砂性软土地层水平定向钻进泥浆性能调控技术

上海地区水平定向钻进铺管（HDD）钻遇不易成孔的砂性软土的概率甚高,这种地层对泥浆性能有特殊要求。但目前普遍使用的复配型增效商品土粉基调相近,难以就大量工程个案恰如其分地发挥关键功效。为此,论述了该类工程环境下泥浆性能设计要点,分析了材料添配的作用机理,重点给出了泥浆密度、粘度、切力以及失水量等参数调控的宜于实用的若干配材技术,以提供相类似工程条件下泥浆运用的可参考方法。     

页岩气基础地质调查皖南地1井钻探施工技术

皖南地1井是部署在安徽省南陵县烟墩镇的一口页岩气基础地质调查井。文章详细介绍了该井的钻探施工工艺技术以及遇到复杂问题的处理方法,并对钻效进行了分析,提出了实现优质高效钻探的措施。项目的顺利实施,梳理了皖南地区地层层序,为页岩气储层理论推测提供了有力的实物数据支撑和验证。     

天津滨海新区抽水引起地面沉降现场试验研究

在天津滨海新区中新生态城服务中心开展了承压含水层抽水引起地面沉降的现场试验,采用振弦式孔隙水压力传感器和一孔多标数据采集器实时监测孔隙水压力和分层标的变化,分析了土体的变形性质和分层沉降的规律。试验结果表明,黏土层变形明显滞后于承压含水层水位的变化,以塑性变形为主且存在蠕变现象,而砂层既存在弹性变形,也存在一定的塑性变形和蠕变性。短期抽取地下水会使抽水井附近承压含水层上覆土体出现上小下大的沉降规律,且最大沉降出现在有明显孔隙水压力变化的土层顶板位置。     

基于LabView的松科2井项目管理系统

松科二井2013年正式启动,2018年5月完井,历时6年,最终井深7018 m。项目执行过程中,形成合同700多个、文件200多个、汇款流水1000多笔、报账流水1600多笔。针对松科二井合同、文件繁多,财务流程繁杂,涉及项目多的特点,基于LabVIEW平台设计了一套项目管理系统。该系统可全程记录松科二井上述合同、文件、汇款和报账信息,建立合同及对应批次汇款和报销的勾稽关系,具有模糊查询、修改、超链接等功能。