南岭东段淋洋岩体的锆石铀-铅定年及其构造和成矿意义

南岭东段淋洋岩体研究程度低,成岩时代众说纷纭,其主要由中细-中粗粒斑状黑云(二云)花岗岩组成。本研究运用激光剥蚀-多接收器电感耦合等离子体质谱(LA-MC-ICPMS)对岩体进行锆石U-Pb精确测年。定年结果表明,淋洋岩体某一断层附近花岗岩的成岩年龄为(233.1±1.3)Ma(MSWD=1.11),下村矿点附近岩体的成岩年龄为(243.3±2.1)Ma(MSWD=2.3),二者均属于印支期,说明淋洋岩体形成于印支期陆陆碰撞和地壳抬升和增厚的构造环境,暗示淋洋岩体可能存在印支期或燕山期的成矿作用,具有进一步研究的价值。     

云南洱源明月—溪灯坪热泉型金矿

明月—溪灯坪金矿金源来自苍山群,受深部岩浆岩期后热液影响后被活化,以络离子形式迁移而形成含金热液,最后在上新统三营组中析出淀积成矿。     

http://www.sciencedirect.com/science/article/pii/S1674987111001332

Isoprenoidal glycerol dialkyl glycerol tetraethers（iGDGTs） from the Gulu hot springs （23-83.6℃,pH>7） and Yangbajing hot springs（80—128℃,pH>7） were analyzed in order to investigate the distribution of archaeal lipids among different hot springs in Tibet.A soil sample from Gulu was incubated at different temperatures and analyzed for changes in iGDGTs to help evaluate whether surrounding soil may contribute to the iGDGTs in hot springs.The sources of bacterial GDGTs（bGDGTs） in these hot springs were also investigated.The results revealed different profiles of iGDGTs between Gulu and Yangbajing hot springs. Core iGDGTs and polar iGDGTs also presented different patterns in each hot spring.The PCA analysis showed that the structure of polar iGDGTs can be explained by three factors and suggested multiple sources of these compounds.Bivariate correlation analysis showed significant positive correlations between polar and core bGDGTs.suggesting the in situ production of bGDGTs in the hot springs.Furthermore,in the soil incubation experiment,temperature had the most significant influence on concentration of bGDGTs rather than iGDGTs.and polar bGDGTs had greater variability than core bGDGTs with changing temperature.Our results indicated that soil input had little influence on the composition of GDGTs in Tibetan hot springs. On the other hand,ring index and TEX₈₆ values were both positively correlated with incubation temperature, suggesting that the structure of archaeal lipids changed in response to varying temperature during incubation.     

Urban warming and global warming: Combined effect on thermal discomfort in the desert city of Beer Sheva,Israel

The effect of climatic changes on human comfort levels was investigated through examination and statistical analysis of long-term trends in human discomfort during summer months in the desert city of Beer Sheva, Israel and in the adjacent rural area of Wadi Hatzerim. In an era of global warming, the urban warming effect is likely to be amplified and as a result increase human discomfort, especially during summer.Climate data for the city of Beer Sheva over the last 40 years shows an increase of temperature and air humidity in comparison to the surrounding rural area. Wind velocity data for Wadi Hatzerim show that changes are inconstant and not significant, while in Beer Sheva, wind velocity is significantly reduced. Two indices – the Discomfort Index (DI) and Physiological Equivalent Air temperature (PET) – were used to evaluate the effect of these climatic changes on human discomfort. Although the bio-meteorological indices showed the same tendency of increasing heat stress values and duration, in Beer Sheva they were more pronounced and more significant than in the desert environment. The study concludes that these combined climatic effects negatively impact human comfort and are more noticeable in desert cities at peak daytime hours during summer.     

西双版纳勐海勐满热泉型金矿

勐满金矿赋存在澜沧群浅变质岩系和侏罗系红层中,金富集对围岩岩性无明显选择,具低温热液蚀变特征,属热泉、变质热液成因。     

近邻指数的城管案件全局分布模式分析

城市管理案件量化分析是城市管理水平提升的技术支撑。针对城市管理典型案件(街面秩序、市容环境及宣传广告),该文提出了一种热点探测流程和方法,并分析城市管理案件全局分布模式。针对传统量化研究的权重确定未考虑研究对象空间分布的问题,该文提出了基于城管案件近邻指数的权重确定方法,并以此为基础开展城管案件的全局分布模式研究。实验结果表明:3种典型城市管理案件呈显著的聚集分布,并且热点区域符合实验区的实证考察;近邻指数作为权重指标具有客观性、计算高效性,合理反映了城管案件的空间分布。     

Tendency Analysis of Socio-hydrology Research Based on Bibliometrics

Socio-hydrology is a new inter-disciplinary science of people and water. The biblio-metrical analysis was made on the socio-hydrology papers included in the Web of Science (WoS) to obtain the study progress of socio-hydrology. The results indicated that the research areas of socio-hydrology mainly covered water resources, environmental sciences, civil engineering, geosciences, environmental engineering, agronomy, environmental studies, ecology, meteorology and atmospheric sciences, and geography. The key topics in general socio-hydrology were water resources, agricultural irrigation, and water policy. Furthermore, the research spots varied with the needs of the societal development in the different decades. They also varied among countries. The special socio-hydrology research mainly focused on water need and security in both urban and rural development, and emphasized the decision support of scientific management through effective hydrological model prediction. Its development will promote the sustainable management and utilization of water resources and help better solve water problems facing the humans.     

Overview on hydrothermal and hot dry rock researches in China

Geothermal energy is a precious resource, which is widely distributed, varied, and abundant. China has entered a period of rapid development of geothermal energy since 2010. As shallow geothermal energy promoting, the depth of hydrothermal geothermal exploration is increasing. The quality of Hot Dry Rock (HDR) and related exploratory technologies are better developed and utilized. On the basis of geothermal development, this paper reviews the geothermal progress during the “12th Five-Year Plan”, and summarizes the achievements of hydrothermal geothermal and hot dry rocks from geothermal survey and evaluation aspects. Finally, the authors predict the development trend of the future geothermal research to benefit geothermal and hot dry rock research.     

致密油层沉积富集模式与勘探开发成效分析

以松辽盆地北部扶余油层致密油层为例,论述致密油沉积富集模式及勘探开发成效。针对扶余油层致密砂岩油藏纵向小层多、层间跨度大,平面砂体错叠分布、单层厚度薄、连续性差、非均质性强等特点,应用丰富的钻井、三维地震资料进行开发试验区精细地质解剖,提出了扶余油层小层级叠置型致密河道砂体发育模式及叠置砂体预测技术,以期为致密油地质及工程双“甜点”的规模区提供科学依据。结果表明,松辽盆地北部扶余油层发育3种叠置类型砂体,即:主力层河道、主力层薄层河道和薄层分流河道型,深化了前期河道砂体控制致密油富集的宏观认识。黏滞介质叠前时间偏移技术,能够提高成像效果的垂向分辨率,可实现FI、FII油层组的垂向高分辨率解释。利用高分辨率地震成像及Z反演技术,提高了3~5 m河道砂岩储层预测能力,很好地刻画了叠置砂体平面展布和纵向位置,有效指导了松辽盆地北部扶余油层陆相致密油勘探与开发井位部署。针对不同叠置砂体,选取相应开发技术,最大限度提高致密油动用率。大庆油田通过多年的“甜点”区的地质深化认识和砂体识别及开采技术攻关,在勘探和开发上均取得很好的成效。     

Lake levels and sedimentary environments during deposition of the Trego Hot Springs and Wono tephras in the Lake Lahontan basin, Nevada, USA

The Wono and Trego Hot Springs (THS) tephras are widespread in the Lahontan basin and have been identified in a variety of sedimentary environments at different elevations. Davis (1983) reported lake level to be at about 1256 m when the THS tephra was deposited, an interpretation questioned by Benson et al. (1997) who interpreted lake level to be ≤ 1177 m at that time. This is a significant difference in lake size with important implications for interpreting the climate that prevailed at that time. Based on new interpretations of depositional settings of the THS bed at multiple sites, the larger lake size is correct. Additional sites containing the Wono tephra indicate that it was deposited when lake level was at about 1217 m in the western subbasins and at about 1205 m in the Carson Sink. Sedimentary features associated with progressively deeper paleowater depths follow a predictable pattern that is modulated by proximity to sediment sources and local slope. Fine to coarse sands with wave-formed features are commonly associated with relatively shallow water. Silty clay or clay dominates in paleowater depths > 25 m, with thin laminae of sand and ostracods at sites located adjacent to or downslope from steep mountain fronts.