Temporal and Spatial Distribution of the Late Devonian (Famennian) Strata in the Northwestern Border of the Junggar Basin, Xinjiang, Northwestern China   总被引：2，自引：0，他引：2  

MA Xueping  ZHANG Meiqiong  ZONG Pu  ZHANG Yubo  Lü Dan 《《地质学报》英文版》2017,91(4):1413-1437

The base of the Saerba Member (Mbr) of the Hongguleleng Formation (Fm.) probably lies in the Famennian Palmatolepis crepida Zone; the Longkou Mbr is probably a sedimentary wedge that thins out northwards; the Duguer Mbr has an approximate age from the upper part of the Pa. marginifera Zone or the Lower Pa. rugosa trachytera Zone through the top of the Pa. perlobata postera Zone; the Wulan Mbr has an age approximately corresponding to the whole Pa. gracilis expansa Zone. In the Bulongguoer section, the Lower Mbr of the Hongguleleng Fm. corresponds to Famennian Pa. crepida Zone through Pa. marginifera Zone; the Middle Mbr probably ranges from the Pa. r. trachytera Zone through the Pa. g. expansa Zone. The basal Namu Mbr of the Heishantou Fm. is probably the product during and after the Hangenberg Event in the upper part of the Siphonodella praesulcata Zone, which is still within the Devonian. In this context, the underlying Chasi Mbr may approximately correspond to the lower part of the S. praesulcata Zone (before the Hangenberg Event). Lateral distribution of strata indicates that the Upper Devonian in the Gennaren and Saerba areas each constitutes a structure of syncline, which differs from the previous recognition of a monocline structure.  相似文献   

新疆哈巴河县托库孜巴依金矿床26号矿脉盲矿预测的构造叠加晕实用模式          下载免费PDF全文

马久菊  李永才  禹斌  魏江  魏子鑫  程宠照  张贺然  阮怡箫  王平户  段旦  樊晋鹏 《地质找矿论丛》2017,32(4):660-666

根据新疆哈巴河县托库孜巴依金矿床的地质特征及成矿规律,对矿床的26号脉及主要围岩进行了系统采样和多元素分析,结合矿区地球化学背景确定了各元素的分带标准;通过对26号矿脉(体)的地球化学特征及构造叠加晕特征研究,总结出金矿(体)单一次成矿的原生晕轴向分带,对矿体不同成矿阶段形成的晕在空间上的叠加形态进行了识别,建立了矿体形成的构造叠加晕实用模式(包括成矿构造叠加晕模式、预测标志及分带标准),利用该实用模式对矿脉深部以及外围进行找矿预测,提出了找矿预测靶位。  相似文献   

贵州普定6种喀斯特石生植物及其土壤的碳酸酐酶活性     

刘天雷  从春蕾  胡丹  王世杰  张显强 《中国岩溶》2017,36(2):187-192

以贵州普定喀斯特石漠化区域石生银叶真藓（Bryum argenteum Hedw.）、扭口藓（Barbula unguiculata Hedw.）、穗枝赤齿藓（Erythrodontium julaceum(Schwaegr.)Par.）、美灰藓（Eurohypnum leptothollum(C. Muell. )Ando.）、东亚砂藓（Racomitrium japonicum Dozy et Molk.）和雪茶（地衣）（Thamnolia vermicularia(Ach.)Asa-hina）为对象,研究了这些石生植物和其基质土壤碳酸酐酶（CA）的活性,可为石生植物的生物岩溶作用机理和石漠化生态环境的治理提供一定的参考。结果表明,6种植物CA的活性存在一定的差异,以美灰藓的CA活性272.99 U·g-1(FW)最高,东亚砂藓的CA活性33.45 U·g-1(FW)最低;银叶真藓基部土壤CA活性最高,为101.81 U·g-1(干土),美灰藓CA活性15.95 U·g-1(干土)最低。CA活性与土壤全磷、全钾、石砾含量和土壤含水量之间呈极显著的相关性。   相似文献   

土壤地球化学测量在印尼某铜铅锌多金属矿区的应用     

李富  马东升  居维伟 《江苏地质》2017,41(1):138-147

通过东南亚—西太平洋多岛地区的热带雨林特殊景观土壤的地球化学测量工作,圈定了12个Cu-Pb-Zn-Ag组合异常,其中6个异常工程验证见矿,扩大了矿体。12个异常中,Ⅰ-1号异常面金属量占全区总面金属量的62.48%,NAP评序值远远大于其他异常,异常元素达13个,是研究区浓集与矿化中心。研究表明,在热带雨林特殊景观地区,土壤地球化学测量与岩石地球化学测量相结合能有效地指导多金属矿床找矿。  相似文献   

降雨对滑坡的影响与基于ANSYS的滑坡数值模拟研究     

李甜  李正媛  樊俊屹  陈志遥  吕品姬  黄兴辉  余丹 《大地测量与地球动力学》2017,37(1):106-110

分析了四川理县一处山体滑坡2014-08～2015-08的监测数据。结果表明,滑坡处于缓慢发生中,滑移的主要方向指向山体旁的学校;1 a中3个监测点在该方向上的累积位移量分别为180 mm、262 mm和448 mm。分析降雨量资料发现,降雨对山体滑坡有延迟的影响。利用ANSYS软件对滑坡发生的过程进行数值模拟,并计算监测点的位移,结果与实际观测情况吻合较好,得到降雨量与弹性模量、密度、粘聚力、内摩擦角之间的关系。该数值模拟实验提供了一种预测滑坡的新方法。  相似文献   

在线地图集发布与服务系统的设计与实现     

王琨  周启  任福  任东宇  杜清运  鲁月新 《地理信息世界》2017,24(1)

地图集作为反映一个地区或一种领域研究成果的地图集合,是测绘行业的一个重要组成部分,传统地图集编制与发布的成果多为纸质版,制作与发布周期比较长,更新速度慢。该系统对在线地图集发布与服务系统进行开发,有效地缩短了地图集编制时间,提高了地图集编制与发布的效率。在对整个系统进行了完整的设计后,对相关关键技术进行了研究,最后实现了整个系统的开发,并对系统主要功能做出展示。  相似文献   

Deformation features and failure mechanism of steep rock slope under the mining activities and rainfall   总被引：1，自引：0，他引：1  

Zhi-qiang Li  Yi-guo Xue  Shu-cai Li  Le-wen Zhang  Dan Wang  Bin Li  Wen Zhang  Kai Ning  Jian-ye Zhu 《山地科学学报》2017,14(1):31-45

Underground mining activities and rainfall have potential important influence on the initiation and reactivation of the slope deformations, especially on the steep rock slope. In this paper, using the discrete element method (UDEC), numerical simulation was carried out to investigate deformation features and the failure mechanism of the steep rock slope under mining activities and rainfall. A steep rock slope numerical model was created based on a case study at the Wulong area in Chongqing city, China. Mechanical parameters of the rock mass have been determined by situ measurements and laboratory measurements. A preliminary site monitoring system has been realized, aiming at getting structure movements and stresses of unstable rock masses at the most significant discontinuities. According to the numerical model calibrated based on the monitoring data, four types of operation conditions are designed to reveal the effect of mining excavation and extreme rainfall on the deformation of the steep rock slope.  相似文献   

面向户外增强现实的地理实体目标检测     

乔延军  饶锦蒙  王骏星  杜清运  任福 《地理信息世界》2017,24(5)

本文研究了多种计算机视觉领域中用于图像分类和目标检测的卷积神经网络模型,在一种目标检测模型的基础上进行了修改,并结合了残差神经网络结构,旨在解决户外增强现实中地理实体目标检测的问题。我们根据这一模型开发了一款户外增强现实原型系统,通过将训练好的模型作为目标检测引擎,达到了较好的近实时性和准确性。  相似文献   

利用重力多尺度分解资料反演青藏高原东北缘地壳厚度   总被引：1，自引：1，他引：0  

吴立辛  杨明芝  赵卫明  傅容珊  朱良保  施行觉 《大地测量与地球动力学》2011,31(1):19-23

通过重力异常分解模型,选用小波基函数“bior3.7”,分解得出青藏高原东北缘布格重力异常资料的小波4阶近似成分,利用其主要由莫霍面产生的布格重力异常,以6条人工地震剖面信息做初始控制条件,反演得出青藏高原东北缘的地壳厚度。  相似文献   

Single Nucleotide Polymorphism of FSHβ Gene Associated with Reproductive Traits in Japanese Flounder (Paralichthys olivaceus)     

Feng He  Haishen Wen  Dahui Yu  Jifang Li  Bao Shi  Caifang Chen  Jiaren Zhang  Guoxiong Jin  Xiaoyan Chen  Dan Shi  Yanping Yang 《中国海洋大学学报(英文版)》2010,9(4):395-398

Follicle stimulating hormone β (FSHβ) of Japanese flounder (Paralichthys olivaceus) plays a key role in the regulation of gonadal development.This study aimed to investigate molecular genetic characteristics of the FSHβ gene and elucidate the effects of single nucleotide polymorphisms (SNPs) of FSHβ on reproductive traits in Japanese flounder.We used polymerase chain reaction single-strand conformation polymorphism (PCR-SSCP) and sequencing of the FSHβ gene in 60 individuals.We identified only an SNP (T/C) in the coding region of exon3 of FSHβ.The SNP (T/C) did not lead to amino acid changes at the position 340 bp of FSHβ gene.Statistical analysis showed that the SNP was significantly associated with testosterone (T) level and gonadosomatic index (GSI) (P0.05).Individuals with genotype TC of the SNP had significantly higher serum T levels and GSI (P0.05) than that of genotype CC.Therefore, FSHβ gene could be a useful molecular marker in selection for prominent reproductive trait in Japanese Flounder.  相似文献