Tectono-sedimentary evolution of Jurassic–Cretaceous diapiric structures: Miravete anticline,Maestrat Basin,Spain     

Jaume Vergés  Yohann Poprawski  Ylènia Almar  Peter A. Drzewiecki  Mar Moragas  Telm Bover-Arnal  Chiara Macchiavelli  Wayne Wright  Grégoire Messager  Jean-Christophe Embry  David Hunt 《Basin Research》2020,32(6):1653-1684

Integration of extensive fieldwork, remote sensing mapping and 3D models from high-quality drone photographs relates tectonics and sedimentation to define the Jurassic–early Albian diapiric evolution of the N–S Miravete anticline, the NW-SE Castel de Cabra anticline and the NW-SE Cañada Vellida ridge in the Maestrat Basin (Iberian Ranges, Spain). The pre shortening diapiric structures are defined by well-exposed and unambiguous halokinetic geometries such as hooks and flaps, salt walls and collapse normal faults. These were developed on Triassic salt-bearing deposits, previously misinterpreted because they were hidden and overprinted by the Alpine shortening. The Miravete anticline grew during the Jurassic and Early Cretaceous and was rejuvenated during Cenozoic shortening. Its evolution is separated into four halokinetic stages, including the latest Alpine compression. Regionally, the well-exposed Castel de Cabra salt anticline and Cañada Vellida salt wall confirm the widespread Jurassic and Early Cretaceous diapiric evolution of the Maestrat Basin. The NE flank of the Cañada Vellida salt wall is characterized by hook patterns and by a 500-m-long thin Upper Jurassic carbonates defining an upturned flap, inferred as the roof of the salt wall before NE-directed salt extrusion. A regional E-W cross section through the Ababuj, Miravete and Cañada-Benatanduz anticlines shows typical geometries of salt-related rift basins, partly decoupled from basement faults. These structures could form a broader diapiric region still to be investigated. In this section, the Camarillas and Fortanete minibasins displayed well-developed bowl geometries at the onset of shortening. The most active period of diapiric growth in the Maestrat Basin occurred during the Early Cretaceous, which is also recorded in the Eastern Betics, Asturias and Basque-Cantabrian basins. This period coincides with the peak of eastward drift of the Iberian microplate, with speeds of 20 mm/year. The transtensional regime is interpreted to have played a role in diapiric development.  相似文献   

三香通络饮联合苯磺酸氨氯地平片治疗老年性高血压病46 例临床观察          下载免费PDF全文

黄彩依  欧阳雅蓉  傅威武 《应用海洋学学报》2020,36(8):14

目的：观察三香通络饮联合苯磺酸氨氯地平片治疗老年性高血压病的临床疗效。方法：将92 例老年性高血压病患者按随机数字表法分为治疗组和对照组,每组各46 例。对照组口服苯磺酸氨氯地平片治疗,治疗组在对照组基础上加用三香通络饮治疗。比较2组的综合疗效、中医证候积分及不良反应发生情况。结果：总有效率治疗组为89.13%（41/46）,对照组为60.87%（28/46）,2组比较,差异有统计学意义（P<0.05）;2组各项中医证候积分治疗前后组内比较,差异均有统计学意义（P<0.05）,且治疗后头晕目眩、头痛、心悸、口干口苦评分组间比较,差异均有统计学意义（P<0.05）;不良反应发生率治疗组为10.87%（5/46）,对照组为19.57%（9/46）,2组比较,差异无统计学意义（P>0.05）。结论：三香通络饮联合苯磺酸氨氯地平片治疗老年性高血压病患者的临床疗效优于单用西药治疗,且能有效减轻临床症状,值得推广。  相似文献   

健脾柔肝息风汤对抽动障碍模型大鼠行为学及多巴胺受体mRNA表达的影响          下载免费PDF全文

朱沁泉  陈盼  曾青松 《应用海洋学学报》2020,36(12):142

目的：探讨健脾柔肝息风汤对抽动障碍模型大鼠运动性抽动的调节机制,为临床治疗抽动障碍提供实验依据。方法：将60只SD大鼠随机分为空白组,模型组,氟哌啶醇组,健脾柔肝息风汤低、中、高剂量组,每组各10只,除空白组外各组大鼠连续7 d腹腔注射亚氨基二丙腈（IDPN）造模,造模成功后连续灌胃6周,灌胃后第1、3、6周分别观察大鼠的行为学改变,采用RT-PCR法检测大鼠脑组织DRD1 mRNA、DRD2 mRNA含量。结果：灌胃6周后,与模型组比较,健脾柔肝息风汤中、高剂量组及氟哌啶醇组在运动行为评分、刻板行为评分及DRD1 mRNA含量方面均有所下降（P<0.05）;而健脾柔肝息风汤低、中、高剂量组及氟哌啶醇组在DRD2 mRNA含量方面有所下降（P<0.05）。结论：健脾柔肝息风汤可通过降低TD模型大鼠脑组织多巴胺DRD1 mRNA、DRD2 mRNA的含量,而改善TD模型大鼠运动性抽动行为。  相似文献   

MEEMD-Elman神经网络的电离层TEC预报模型     

汤俊  高鑫 《大地测量与地球动力学》2020,40(4):395-399

利用IGS中心提供的不同纬度的电离层TEC值,建立基于改进的集总平均经验模态分解(MEEMD)算法和Elman回归神经网络(ERNN)模型相结合的电离层TEC预报模型。实验结果表明,在低、中、高不同纬度采用本文方法预报5 d电离层TEC的预测值的均方根误差最优可达到0.96 TECu,相对精度最优达到95.4%,精度较EMD-ERNN模型及单一ERNN模型有显著提高。  相似文献   

Supply and Demand Levels for Livestock and Poultry Products in the Chinese Mainland and the Potential Demand for Feed Grains     

HUANG Shaolin  LIU Aimin  LU Chunxia  MA Beibei 《资源与生态学报(英文版)》2020,11(5):475-482

The widening gap between the supply and demand levels for livestock and poultry products in the Chinese mainland poses a significant challenge to the secure supply of feed grains. Therefore, the accurate prediction of the demand potential for feed grains represents a key scientific issue for ensuring food security in the Chinese mainland. This study is based on an analysis of several factors, such as the Chinese mainland’s output, trade volume, apparent consumption of livestock and poultry products, and two different scenarios for predicting the future demand for feed grains are assessed. The results indicate that output and consumption of livestock and poultry products, as well as the country’s trade deficit and the pressure of the supply and demand balance with respect to these products, have been increasing in recent years. The analysis predicts that the demand for feed grains in the Chinese mainland will reach 425.5 or 389.6 million tons in 2030 based on the two scenarios. This finding indicates that with the increasing demand for livestock and poultry products in the Chinese mainland, the demand for feed grains will continue to increase, and the shortfall in feed grains and raw materials will expand further, especially dependence on external sources of protein-rich feed grains will remain high.  相似文献   

基于多源数据的山东省围填海造地特点及发展趋势研究          下载免费PDF全文

安国强 《海洋开发与管理》2018,35(3):15-20

文章基于文献资料分析、官方数据汇总、国产高分辨率资源卫星遥感影像信息提取以及发展趋势研判等方法,对改革开放以来山东省全海域范围内围填海造地的历史发展、现状特征、发展趋势及其对生态环境的影响进行了分析和总结,并提出相关的政策建议。研究表明:改革开放以来,山东省围填海造地累计已超过4.58万hm~2。21世纪以来围填海造地进入快速增长时期,尤其是2010年以来,全省围填海造地又掀起了一次新的热潮,其面积和速度都远远超过了历史水平。鉴于围填海造地对环境和生态的巨大影响,文章提出了加强管理、严格环境影响评价、引入生态环境补偿机制以及建立分级填海评估制度和年度监测机制等建议。  相似文献   

鄂尔多斯地块周缘垂直形变场负位错反演与应变积累研究     

张希  刘立炜  郝明  白卓立 《大地测量与地球动力学》2019,39(6):551-556

利用鄂尔多斯地块及其周缘1970～2014年的垂直形变速率场资料，借助负位错反演研究该区域长期应变积累。结果表明，地块东北缘山西断陷带中北段年均能量积累增量、剪应力强度都较高，西南缘六盘山断裂与渭河断裂西段次之；山西断陷带中南段至晋陕交界处年均剪应力强度较高且显示一定程度的能量积累；西秦岭构造区尤其西秦岭北缘断裂西段、晋冀蒙交界区也反映一定程度的能量积累特性。  相似文献   

捷联式航空重力扰动矢量解算及误差补偿     

郭栋  孙中苗  吴富梅  张琪 《大地测量与地球动力学》2018,38(12):1295-1301

介绍捷联式航空重力矢量测量的基本原理，利用波数相关滤波（WCF）、比力线性校正的方法对重力扰动的水平和垂向分量进行误差补偿，评定内符合精度。对国产捷联式航空重力矢量仪的某次试验数据进行处理，以验证和评估航空重力矢量仪的性能。结果表明，在半波长分辨率为7.5 km时，6条重复测线的重力扰动水平分量经波数相关滤波处理后，东、北向分量的平均内符合精度分别从9.77 mGal、9.18 mGal提高到5.95 mGal、3.83 mGal；对比力的垂向分量线性校正后，将解算的重力扰动垂向分量再用WCF方法处理，其平均内符合精度从1.27 mGal提高到0.59 mGal。  相似文献   

亚太区域不同遮挡情形下多系统组合PPP定位效能分析     

黄观文  雷哲哲  王进  赵丽华 《大地测量与地球动力学》2018,38(6):562-567

利用多测站实测GNSS观测数据，模拟四周遮挡（城市环境）、单侧遮挡（峡谷环境）和顶空遮挡（大型桥梁路基环境）3种遮挡环境，从可用卫星数、PDOP值、可用历元率、定位精度和收敛时间5个方面，综合分析多系统PPP技术的定位服务效能。结果显示，相比GPS单系统PPP定位结果，在无遮挡环境下，四系统融合PPP技术在可用卫星数、PDOP值、可用历元率、定位精度和收敛时间方面分别改进300%、40%、2%、20%和50%；在遮挡环境下，分别改进300%、60%、25%、39%和52%。  相似文献   

基于ASP.NET MVC的海域海岸带整治修复项目信息管理系统的设计和实现          下载免费PDF全文

于新宇  李家  郝杰  闫吉顺 《海洋开发与管理》2018,35(2):71-73+93

文章在国家大力开展海域海岸带整治修复的背景下,利用Visual Studio 2013开发平台和SQL Server 2014数据库软件,采用ASP.NET MVC架构设计海域海岸带整治修复项目信息管理系统,实现整治修复项目信息的快速录入,并可进行查询、展示和互动等操作。相比传统信息管理系统,本系统大大提高了可维护性、可扩展性、灵活性和封装性,可促进我国海域海岸带整治修复项目信息管理实现现代化。  相似文献