吉尔吉斯斯坦布丘克造山型金矿床：来自流体包裹体、H- O- S同位素证据     

史鹏亮  屈海浪  鄂建新  刘春发  缪广  马麒镒  戴毅 《地质学报》2023,97(3):738-752

吉尔吉斯斯坦北天山构造带的矿床学数据缺乏,制约了天山造山带境内外成矿对比。布丘克金矿床位于吉尔吉斯斯坦北天山构造带中部。金矿体为石英复脉,呈带状发育于NWW向韧性剪切带中。矿体倾向SSW,倾角60°～70°,赋矿围岩主要为侵入于早古生代变质碎屑杂岩中的正长斑岩。布丘克金矿床成矿期石英流体包裹体观察、石英H-O同位素、硫化物S同位素测试结果显示,布丘克金矿床石英脉中包裹体大小集中在2～10μm之间,类型以H₂O-CO₂型、富CO₂型、水溶液型包裹体为主,成分以富CO₂、含CH₄为特征。成矿流体具有中温(200～320℃)、低盐度(3%～7%NaCl_eqv)特征;石英δD_V-SMOW值介于-108.1‰～-90.2‰之间,δ¹⁸O_流体值介于4.86‰～9.26‰之间;黄铁矿δ³⁴S分布在0‰左右(-0.9‰～1.6‰)。综合本文数据、矿床地质特征、区域地质资料,本文认为布丘...  相似文献   

Performance of the seasonal forecasting of the Asian summer monsoon by BCC_CSM1.1(m)   总被引：1，自引：0，他引：1  

Xiangwen Liu  Tongwen Wu  Song Yang  Weihua Jie  Suping Nie  Qiaoping Li  Yanjie Cheng  Xiaoyun Liang 《大气科学进展》2015,32(8):1156-1172

This paper provides a comprehensive assessment of Asian summer monsoon prediction skill as a function of lead time and its relationship to sea surface temperature prediction using the seasonal hindcasts of the Beijing Climate Center Climate System Model, BCC_CSM1.1(m). For the South and Southeast Asian summer monsoon, reasonable skill is found in the model's forecasting of certain aspects of monsoon climatology and spatiotemporal variability. Nevertheless, deficiencies such as significant forecast errors over the tropical western North Pacific and the eastern equatorial Indian Ocean are also found. In particular, overestimation of the connections of some dynamical monsoon indices with large-scale circulation and precipitation patterns exists in most ensemble mean forecasts, even for short lead-time forecasts. Variations of SST, measured by the first mode over the tropical Pacific and Indian oceans, as well as the spatiotemporal features over the Niño3.4 region, are overall well predicted. However, this does not necessarily translate into successful forecasts of the Asian summer monsoon by the model. Diagnostics of the relationships between monsoon and SST show that difficulties in predicting the South Asian monsoon can be mainly attributed to the limited regional response of monsoon in observations but the extensive and exaggerated response in predictions due partially to the application of ensemble average forecasting methods. In contrast, in spite of a similar deficiency, the Southeast Asian monsoon can still be forecasted reasonably, probably because of its closer relationship with large-scale circulation patterns and El Niño-Southern Oscillation.  相似文献   

基于WebGIS的气象综合显示系统改进与实现   总被引：1，自引：1，他引：0       下载免费PDF全文

赵文芳  刘旭林  聂凯 《应用气象学报》2015,26(3):378-384

针对基于WebGIS的气象信息显示和查询系统在应用中存在交互性差、响应速度慢、可扩展性不强等问题, 引入MapServer开源应用框架pMapper,对框架的技术路线进行探讨,并提出在pMapper框架下实现基于Ajax的WebGIS方案,最后通过修改源代码和开发嵌入式组件快速构建基于Ajax的WebGIS气象综合显示系统,实现原业务系统的升级。通过在实际业务中使用证明,改进后的系统可有效提高WebGIS的运行效率,可支持100~150用户并发;多数页面平均响应时间在3 s之内。基于pMapper框架开发WebGIS仅需要15~30 d,提高了开发效率,为WebGIS开发人员提供了一种快速构建WebGIS应用系统的新思路。  相似文献   

南阳市1960—2013年高温日数变化特征及原因分析   总被引：1，自引：0，他引：1  

陈建新  闫瑛  周鑫  陈燕  易伟霞  陈宇  温洛 《河南气象》2015,(2):87-91

根据国家气象信息中心气象资料室1960—2013年南阳市地面气象月报表的观测资料,采用线性回归、简单相关系数法、M-K突变检验和Morlet小波分析等方法,研究了南阳市高温日数的变化特征,结果表明:1960—2013年南阳市共出现788次高温日;出现高温日数最多的是2013年,为37天;1987年无高温日。南阳市高温日数6月份最多,占高温天气发生总次数的36.7%;9月最少,占总次数的2.2%。从1960—2013年高温日的逐年分布情况可以看出,54 a间高温日数整体呈下降趋势,倾向率为-1.59天/10a。南阳市年高温日数在20世纪70年代的降低是一突变,具体是从1971年开始。由南阳高温日数小波系数实部图可见,高温日数存在多重时间周期尺度上的嵌套复杂结构现象,包含了多个不同尺度的周期变化,南阳年高温日数变化存在3个明显的周期振荡,分别是10~12 a、26~28 a和50~51 a的尺度。从小波方差图中可以看出,12 a、28 a、50 a存在峰值,其中尺度50 a峰值最高,能量最大;其次是尺度12 a的。高温日数较多年比高温日数较少年6—8月500 h Pa平均环流场副高西伸脊点更偏西;高温日数较多年500 h Pa平均环流场更为平直,以纬向环流为主,不利于冷空气南下,因此多晴热天气。高温日数较少年环流场上华北地区波动幅度更大,冷空气和降水天气过程较多。1960—2013年5—9月降水量呈增加趋势,这也相应地减少了高温天气。1960—2013年5—9月南阳市日照时数一直处于下降趋势,日照时数的下降也使高温日数减少。  相似文献   

北阿尔金红柳泉早古生代枕状玄武岩及其大地构造意义   总被引：5，自引：1，他引：4  

孟繁聪  张建新  于胜尧  陈松永 《地质学报》2010,84(7):981-990

对北阿尔金蛇绿混杂岩带中红柳泉剖面的枕状玄武岩进行了岩石地球化学研究,主元素具有高钛高钠、低铝低钾的特点。其中SiO2含量为43.34%～52.55%,Na2O含量为3.97%～7.36%,K2O含量为0.27%～0.94%。TiO2含量为2.13%～5.49%,Al2O3含量为9.02%～13.77%,显示出细碧岩(Spilite)的地球化学特征。微量元素配分模式类似于洋岛或海山玄武岩(OIB/Seamount),不同于洋中脊玄武岩(MORB)。87Sr/86Sr比值为0.7043～0.7052,143Nd/144Nd比值为0.51253～0.51265,εNd(448Ma)为2.19～3.88,玄武岩浆主要来自于上涌的含有富集组分的软流圈地幔。综合考虑剖面上出现的沉积岩石组合,推测玄武岩形成于弧后盆地的海山环境。在阿尔金走滑断裂形成以前,北阿尔金与北祁连构成一个统一的弧后盆地系统,是原特提斯洋在中国境内的最北部边界,这对认识青藏高原和中国西部大地构造格局的演化具有重要意义。  相似文献   

Investigation of the sulfur speciation during chalcopyrite leaching by moderate thermophile Sulfobacillus thermosulfidooxidans     

Jin-lan Xia  Yi Yang  Huan He  Chang-li Liang  Xiao-juan Zhao  Lei Zheng  Chen-yan Ma  Yi-dong Zhao  Zhen-yuan Nie  Guan-zhou Qiu 《International Journal of Mineral Processing》2010,94(1-2):52-57

The surface sulfur speciation of chalcopyrite leached by moderately thermophilic Sulfobacillus thermosulfidooxidans was investigated by employing scanning electron microscopy (SEM), X-ray diffraction (XRD) and sulfur K-edge X-ray absorption near edge structure spectroscopy (XANES), accompanying with the leaching behavior elucidation. Leaching experiment showed that there was an optimum range of the redox potential for chalcopyrite dissolution. Leaching products were found accumulating during the leaching process, which might be jarosite according to the XRD analysis. The sulfur K-edge spectra indicated that chalcocite might be the intermediate sulfur compound under a critical redox potential, which might explain the existence of optimum range of the redox potential and provide an evidence for the two-step leaching model of chalcopyrite at low Eh. In addition, the results of sulfur K-edge spectra showed jarosite would accumulate on mineral surface, which might be the main component of the passivation layer.  相似文献   

裂缝型储层预测技术优选——以塔北地区奥陶系为例   总被引：1，自引：0，他引：1  

刘建新  孙勤华  王锦喜  姚清洲 《海相油气地质》2010,15(3)

塔北地区奥陶系碳酸盐岩裂缝型储层的地震反射特征总体表现为弱振幅,常用技术难以预测。通过预测技术优选发现相关分量P1属性能够较好地预测这类储层。应用该属性分别对塔北英买2井区奥陶系一间房组、轮古7井区奥陶系鹰山组以及轮古东地区奥陶系良里塔格组的弱振幅反射的裂缝型储层进行了预测,结果与实钻有较高的吻合率。  相似文献   

Modeling and representation for earthquake emergency response knowledge: perspective for working with geo-ontology     

Jinghai Xu  Timothy L. Nyerges  Gaozhong Nie 《International journal of geographical information science》2014,28(1):185-205

Earthquake emergency response is one of the three earthquake disaster mitigation work systems in China, already achieving good results in some earthquake disaster mitigation situations. Earthquake emergency plans and emergency command systems are among the most important research and operations components of emergency response. These components commonly come with challenges, such as the pertinence of emergency commands and the operability of the countermeasures to be improved. The promise for solving this problem resides with applying knowledge that aids intelligence creation for decision-making. In this paper, we put forward a conceptual model of knowledge for earthquake disaster emergency response (EDER); compositions of EDER knowledge are introduced within architecture. A modeling method incorporating geo-ontology is used to build basic modeling primitives. Geo-ontology serves to represent geospatial characteristics of the EDER knowledge and addresses a need for semantic interoperability in the modeling process. A decision problem framework and a case study have been used as theoretical framework and an application test, respectively, to evaluate the EDER knowledge architecture and models. The EDER knowledge model provides a foundation for intelligent emergency response that helps solve knowledge problems to improve earthquake disaster response.  相似文献   

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Relationships between Interannual and Intraseasonal Variations of the Asian-Western Pacific Summer Monsoon Hindcasted by BCC_CSM1.1（m）   总被引：4，自引：0，他引：4  

LIU Xiangwen  ;WU Tongwen  ;YANG Song  ;LI Qiaoping  ;CHENG Yanjie  ;LIANG Xiaoyun  ;FANG Yongjie  ;JIE Weihua  ;NIE Suping 《大气科学进展》2014,31(5):1051-1064

Using hindcasts of the Beijing Climate Center Climate System Model, the relationships between interannual variability （IAV） and intraseasonal variability （ISV） of the Asian-western Pacific summer monsoon are diagnosed. Predictions show reasonable skill with respect to some basic characteristics of the ISV and IAV of the western North Pacific summer monsoon （WNPSM） and the Indian summer monsoon （ISM）. However, the links between the seasonally averaged ISV （SAISV） and seasonal mean of ISM are overestimated by the model. This deficiency may be partially attributable to the overestimated frequency of long breaks and underestimated frequency of long active spells of ISV in normal ISM years, although the model is capable of capturing the impact of ISV on the seasonal mean by its shift in the probability of phases. Furthermore, the interannual relationships of seasonal mean, SAISV, and seasonally averaged long-wave variability （SALWV; i.e., the part with periods longer than the intraseasonal scale） of the WNPSM and ISM with SST and low-level circulation are examined. The observed seasonal mean, SAISV, and SALWV show similar correlation patterns with SST and atmospheric circulation, but with different details. However, the model presents these correlation distributions with unrealistically small differences among different scales, and it somewhat overestimates the teleconnection between monsoon and tropical central-eastern Pacific SST for the ISM, but underestimates it for the WNPSM, the latter of which is partially related to the too-rapid decrease in the impact of E1 Nifio-Southern Oscillation with forecast time in the model.  相似文献