西藏青草山铜多金属矿地质特征及找矿标志     

罗俊杰  游钦 《四川地质学报》2012,(2):147-149

阐述了西藏青草山铜多金属矿所处的区域地质背景和矿区地质特征。矿床位于羌南地块的磨盘山断裂带内,矿体产于花岗闪长斑岩及围岩中,蚀变类型及分带特征与斑岩型矿床蚀变特征十分吻合,因此初步确定矿床成因类型为斑岩型铜矿。  相似文献   

二调中MapGIS数据到ArcGIS数据转换问题的研究   总被引：1，自引：0，他引：1  

葛琴 《安徽地质》2012,(3):223-225

目前,应用比较广泛的两种地理信息系统软件MapGIS软件和ArcGIS软件,都各自占有很大的地理信息市场.但它们的各自都拥有自己的数据格式.一直以来地矿部门所采用GIS软件基本上是MapGIS软件,随着ArcGIS软件在我国各领域应用逐渐广泛,这就需要我们将目前拥有的大量MapGIS格式的GIS数据转换成ArcGIS数据.因此在资源有效利用驱使下,迫切需要实现这两种数据格式的共享.本文深入讨论了实现GIS软件之间数据格式转换的各种方法,并描述了由MapGIS格式数据转换为ArcGIS格式数据的详细过程.通过转换过程分析这种转换模式存在的问题,并提出解决问题的方法.  相似文献   

Seismic Facies in a Deepwater Area of a Marine Faulted Basin: Deepwater Area of the Paleogene Lingshui Formation in the Qiongdongnan Basin   总被引：1，自引：0，他引：1  

CHEN Huanqing  ZHU Xiaomin  ZHANG Gongcheng  ZHANG Xilin  ZHANG Qin 《《地质学报》英文版》2012,86(2):473-483

In recent years, deep water areas have become popular exploration fields because of their abundant hydrocarbon resource potential. There are only relatively poor planar seismic profiles and no wells for deepwater areas of the Lingshui Formation in the Qiongdongnan Basin. A lot of faults developed and strata are fragmented due to high temperatures and high pressure, and this has resulted in dim sequence boundaries. Based on seismic data of the deepwater area and well data of bordering shallow water areas, Lingshui Formation was divided into four third class sequences; namely SI, SII, SIII and SIV, and the three-dimensional isochronous stratigraphic framework of the Lingshui Formation in the studied area was shaped. Based mainly on seismic attributes such as amplitude, continuity, internal structure and external shape, six typical seismic facies were identified, including mat-shaped, filling, wedge-shaped, foreset, moundy-shaped and lenticular-shaped, and a seismic facies distribution map was subsequently drawn. With studies on wells of bordering shallow water areas, regional sedimentary characteristics, and isopach map as references, sedimentary planar distribution features were analyzed. The deepwater area of the Lingshui Formation has mainly developed littoral and shallow sea. Sandstone bodies of fan delta, braided river delta, slope fan, basin floor fan, and turbidite fan are at an interdigitate junction to marine hydrocarbon source rocks and thus are favorable prospecting targets.  相似文献   

硝酸-氢氟酸酸溶电感耦合等离子体质谱法测定黑钨矿单矿物中稀土元素   总被引：1，自引：0，他引：1  

熊采华  储溱  赵志飞  熊玉祥  柳建一 《岩矿测试》2012,31(4):602-606

黑钨矿单矿物通常混入铬、钙、镁、钴、钪和稀土等元素,属于富含稀土型矿物,准确测定黑钨矿中的稀土元素对判定黑钨矿矿床的成因相当重要。黑钨矿单矿物样品经硝酸-氢氟酸高压密闭溶解,蒸干除去氢氟酸,以硝酸提取使稀土元素进入溶液,钨则以钨酸的形式从溶液中沉淀而分离,采用电感耦合等离子体质谱法测定稀土元素的含量。用Rh、Re双内标校正,有效地降低了分析信号漂移对分析结果的影响;Ba对153Eu干扰、Pr、Ce对157Gd干扰,采用分析软件在线扣除。该方法消除了钨基体元素的干扰,复溶沉淀实验表明残留稀土相对量小于10%,稀土元素的测定值与过氧化钠碱熔法的结果相符。方法加标回收率为94.2%～104.0%,相对标准偏差小于10%,检出限小于0.026μg/g。方法简便,准确度高,检出限低,适用于黑钨矿单矿物的分析。  相似文献   

氢化物发生-原子荧光光谱法测定土壤中水溶态砷(Ⅲ)和砷(Ⅴ)     

于兆水  张勤  刘玲 《岩矿测试》2012,31(5):838-841

以氢气发生器为氩-氢火焰提供纯净、稳定的氢气,原子荧光光谱法测定土壤中水溶态和可交换态Sb(Ⅲ)和Sb(Ⅴ)已有应用,本研究进一步将此方法用于测定土壤样品中的As(Ⅲ)和As(Ⅴ)。在0.3mol/L NaH2PO4-Na2HPO4缓冲液中,采用氢化物发生-原子荧光光谱法测定土壤中水溶态As(Ⅲ)和总砷的含量,通过差减法计算As(Ⅴ)的含量。实验考察了0.02～0.4 mol/L NaH2PO4-Na2HPO4对As(Ⅲ)和As(Ⅴ)测定的影响,结果表明0.3 mol/L NaH2PO4-Na2HPO4可以有效掩蔽As(Ⅴ)。As(Ⅲ)的检出限为2.92 ng/g,总砷的检出限为2.35 ng/g;As(Ⅲ)和As(Ⅴ)的加标回收率分别为96%～104%和101%～103%。本方法不再依靠化学反应产生氢气来点燃并维持氩氢火焰,可在发生氢化反应的任何介质中测定砷,且不需要考虑酸度问题。方法操作简便,准确度高,能满足大批量样品分析要求。  相似文献   

新型有机-无机杂化涂层-气相色谱/质谱联用测定正构烷烃性能研究     

邓海冬  帅琴  丁晓晓  顾涛  朱丹 《岩矿测试》2012,31(6):1015-1020

水体中正构烷烃的含量反映了研究区域有机物污染水平.痕量正构烷烃的测定常常需要结合分离富集方法才能保证灵敏度和选择性,液液萃取等常规分离富集方法存在耗时长、有机溶剂使用量大等缺点,而新型固相微萃取(SPME)分离富集技术相比而言具有高效简便、富集效率高的特点.本文采用溶胶-凝胶法自制稳定性和耐基质性能更优的有机-无机杂化SPME涂层,结合气相色谱-质谱(GC - MS)检测技术,对水样中26种正构烷烃进行同时测定.在优化的SPME - GC/MS条件下,采用浸入式萃取方式,萃取温度为25℃,萃取时间为30 min,26种正构烷烃的分析信号与浓度之间有良好的线性关系(线性相关系数为0.9935 ～0.9999),方法检出限为0.011 ～0.085μg/L(k=3),相对标准偏差(RSD,n=5)为3.9％ ～10.0％.新型有机-无机杂化涂层与传统的分离富集技术相比,减少了有机溶剂的使用,提高了工作效率;与商用PDMS涂层相比,增加了正构烷烃同时检测的种类,提高了灵敏度,检出限低2～10倍.自制的有机-无机杂化SPME涂层体现出优异的分析性能和应用潜力.  相似文献   

General framework and key issues concerning integrated strategies for coping with drought and flood in China in a changing environment     

Deng-Hua Yan  Jing Feng  Chuan-Zhe Li  Tian-Ling Qin  Bai-Sha Weng  Xin Jin 《Natural Hazards》2012,64(1):577-592

This paper focused on the development of a framework for collective water resources management in China to meet the change of drought and flood. Based on the observational data of drought and flood from 1950 to 2009 and the precipitation from 1961 to 2010, using the Standardized Precipitation Index (SPI) method, the evolutionary characteristic of drought and flood was analyzed. The results showed that drought and flood occurred frequently, simultaneous occurrences of drought and flood and the rapid shift between the two were increasing. The framework for collective strategies responding to drought and flood under this ever-changing environment was presented. A series of potential mitigation, prevention, and adaptation strategies were discussed. These included both planning and implementation side strategies. In regard to planning, the strategies for dealing with drought and flood should be shifted from crisis management to collective management, unifying normal and emergency management. Combination risk zoning of drought and flood should be conducted and collective emergency planning should be formulated. Moreover, the regulation capability of water conservancy projects group should be optimized to the highest possible level. In regard to implementation, based on the water resources collective management, rational water allocation for both normal and extreme value processes should be implemented. The water conservancy project groups for the extreme value process should work together, and the flood limit water level of reservoirs should be controlled dynamically.  相似文献   

蜀南地区茅口组古岩溶缝洞系统与地层水化学性质的关系   总被引：1，自引：1，他引：0       下载免费PDF全文

桑 琴 未 勇 程 超 黄 静吕宗刚  吴昌龙彭祚远 吴东昊 《中国地质》2012,39(1):228-235

在总结和分析451口井地层水测试资料的基础上,对蜀南地区茅口组地层水矿化度和水型特征进行研究,结合钻井、地震、测井等资料,系统总结了古岩溶的垂向分带模式,阐述了各岩溶带在剖面上的发育特征,并对不同化学性质的地层水的储存方式进行了分析。结果表明:该区地层水矿化度普遍较低,变化范围大,矿化度分布特征与地层水势能有关。CaCl2型地层水矿化度较高,具正向浓缩、深变质、渗流缓慢等特征,NaHCO3型、Na2SO4型、MgCl2型水矿化度较低,其出现与岩溶作用有关,所在地区的地层水性质不活跃。古岩溶带在垂向上可分为:表层岩溶带、垂直渗流岩溶带、水平径流岩溶带和深部潜流岩溶带,不同岩溶带特征各异。CaCl2型水的形成与大气淡水淋滤、地层压实释水和埋藏变质作用有关,以深层滞留水方式赋存于地层孔隙中,低矿化度水则以封存水方式储存于岩溶封闭体中。  相似文献   

上海浦东新区电子信息与生物医药企业创新合作网络比较研究     

王琳  肖勤  曾刚 《地域研究与开发》2005,24(5):34-37

企业创新合作网络是企业利用外部资源的通道。基于技术特征不同等原因,电子与信息产业和生物医药产业的企业创新合作网络呈现出相似性和差异性。文章通过研究上海浦东新区电子与信息产业和生物医药产业的企业创新信息来源及与创新合作伙伴交流情况,认为这两个产业的企业创新合作网络建设还处于一个初级阶段。由于绝大多数生物医药和电子与信息企业属于植入型的企业,尤其不少是跨国公司企业,母公司、国外供应商是其主要的创新合作伙伴,他们的本地根植性较弱。生物医药企业创新合作网络更体现出技术驱动的特征,与高校、科研机构的创新合作交流比较频繁;而客户在电子与信息企业的创新过程中越来越重要,与客户的创新合作交流要比生物医药企业更紧密。  相似文献   

The tetrad effect and geochemistry of apatite from the Altay Koktokay No. 3 pegmatite, Xinjiang, China: implications for pegmatite petrogenesis   总被引：1，自引：0，他引：1  

Ming-Jian Cao  Qi-Feng Zhou  Ke-Zhang Qin  Dong-Mei Tang  Noreen J. Evans 《Mineralogy and Petrology》2013,107(6):985-1005

In order to better constrain the evolution and petrogenesis of pegmatite, geochemical analysis was conducted on a suite of apatite crystals from the Altay Koktokay No. 3 pegmatite, Xinjiang, China and from the granitic and amphibolitic wall rocks. Apatite samples derived from pegmatite zones show convex tetrad effects in their REE patterns, extremely negative Eu anomalies and non-chondritic Y/Ho ratios. In contrast, chondritic Y/Ho ratios and convex tetrad effects are observed in the muscovite granite suggesting that different processes caused non-chondritic Y/Ho ratios and lanthanide tetrad effects. Based on the occurrence of convex tetrad effects in the host rocks and their associated minerals, we propose that the tetrad effects are likely produced from immiscible fluoride and silicate melts. This is in contrast to previous explanations of the tetrad effect; i.e. surface weathering, fractional crystallization and/or fluid-rock interaction. Additionally, we put forward that extreme negative Eu and non-chondritic Y/Ho in apatite are likely caused by the large amount of hydrothermal fluid exsolved from the pegmatite melts. Evolution of melt composition was found to be the primary cause of inter and intra-crystal major and trace element variations in apatite. Mn entering into apatite via substitution of Ca is supported by the positive correlation between CaO and MnO. Different evolution trends in apatite composition imply different crystallization environments between wall rocks and pegmatite zones. Based on the geochemistry of apatite samples, it is likely that there is a genetic relationship between the source of muscovite granite and the source of the pegmatite.  相似文献