额尔齐斯成矿带萨尔布拉克金矿床的构造-成矿流体

萨尔布拉克金矿床位于准噶尔盆地北东缘之喀拉通克岛弧带,北邻呈北西西向展布的额尔齐斯构造挤压带,矿体受次级断裂萨尔布拉克韧性剪切带控制。据构造变形-热液蚀变-矿物共生组合特征,构造-成矿阶段划分为4个：Ⅰ韧性变形-黄铁矿化-硅化阶段;Ⅱ韧脆性变形-黄铁矿-毒砂-石英阶段;Ⅲ网脉状石英阶段（多金属硫化物阶段）;Ⅳ石英-碳酸...     

The species diversity of fusulinaceans and high-frequency sea-level changes in the Carboniferous-Permian boundary section at Xikou, Zhen’an County, Shaanxi Province, China

The study on the interrelation between sea-level changes and biodiversity with its evolution has great significance for understanding the impact of global changes on organic evolution and exploring the inherent laws of life-environment coevolution in geological history. In this paper, the stratigraphic distribution of fusulinacean fauna in the Carboniferous-Permian boundary section at Xikou, Zhen’an County, Shaanxi Province, is analyzed quantitatively, and the relationship between the species diversity of fusulinaceans and relative sea-level changes is discussed. As a whole, the species numbers of fusulinacean fauna experience a rapid increase and an obvious decline in Xikou, Zhen’an County, from the Late Carboniferous to the Early Permian. There is a significant increase in species diversity around the Carboniferous-Permian boundary, which is one of the biggest bio-events of the fusulinacean fauna, and represents the radiation of Pseudoschwagerininae subfamily in the studied area. Integrated fusulinacean species diversity into sequence stratigraphic framework, detailed study suggests that the species diversity of the fusulinaceans is closely related to its relative stratigraphic location, and is essentially controlled by the sea-level changes, especially by the high-frequency sea-level changes. Generally, the species diversity of fusulinaceans is low, and the number of first and last appearance datum is small in the lower unit of high-frequency depositional cycle formed during the quick rise of the sea level; whereas the species diversity of fusulinaceans is high, and the number of first and last appearance datum is large in the upper unit of high-frequency cycle formed during the slow fall of the sea level. Within the third-order depositional sequence, the species diversity of the fusulinaceans at the first flooding surfaces and the maximum flooding surfaces is low, and it increases upward. The fusulinacean species diversity is low within the transgressive systems track, and it is high within the highstand systems track. The second-order rise and fall in sea level coincide with the bloom and decline of high order taxa of fusulinaceans.     

Stable isotopes in surface snow along a traverse route from Zhongshan station to Dome A, East Antarctica

Samples of surface snow were collected for stable isotope analysis along the traverse route from Zhongshan to Dome A (East Antarctica) from Dec 28th, 2007 to Feb. 8th, 2008. The local relationship between δD and surface temperature is established to be 6.4 ± 0.2 ‰ per °C, very similar to the average for East Antarctic. The deuterium excess shows a pattern of high values over Antarctica, particularly at Dome A. We compare our data with an atmospheric general circulation model which includes stable water isotopes (ECHAM5-wiso). The model simulation captures the right levels of δD, but overestimates δ¹⁸O. This study provides support for the ongoing deep ice core project at Dome A.     

用微体古生物定量水深法对东营凹陷沙四上亚段沉积早期湖泊水深再造

东营凹陷广布的始新统沙河街组四段上亚段滩坝砂岩具有十分巨大的勘探价值和潜力。对沙河街组沙四上亚段滩坝砂体的精细勘探,要求对古水深展开水深量化再造的研究。文中在对东营凹陷47口含沙四上亚层段低位域层段多门类微体古生物分析和高分辨层序地层学地层划分基础上,确定量化估计水深的古生物替代标志,获得如下主要研究成果:(1)获得较高分辨率(2m等深线表示)的东营凹陷沙四上亚段低位体系域沉积期间古水深量化等值图;(2)东营凹陷是一个以滨浅湖(水深0～15m)为主的湖泊;(3)湖盆具"北深陡南浅缓"的特点,湖边高地或隆起向湖方向深入的岬角一带与陡坡冲积环境相邻;(4)湖盆凹陷内"东西分异"的次级地貌格局,从东向西,出现较深水区、中央深水区和西南浅水带,其长轴均为北东-南西走向。上述结果可与前人研究比较或验证,表明文中所获的多门类微体化石叠合水深量化标志和结果可信。     

金矿遥感找了模式探讨

根据金矿成矿特点及控矿因素分析，通过成矿信息与遥感信息两者内在联系分析，探讨了遥感综合信息找矿模式的方法，及找矿模式尺度、适用范围和注意的问题。并以秦岭地区金矿为例尝试性地建立了遥感综合找金模式。     

EVALUATION OF CGCM AND SIMULATION OF REGIONAL CLIMATE CHANGE IN EAST ASIA*

In this paper,experiment results about East Asia climate from five CGCMs are described.The ability of the models to simulate present climate and the simulated response to increased carbon dioxide are both covered.The results indicate that all models show substantial changes in climate when carbon dioxide concentrations are doubled.In particular,the strong surface warming at high latitudes in winter and the significant increase of summer precipitation in the monsoon area are produced by all models.Regional evaluation results show that these five CGCMs are particularly good in simulating spatial distribution of present climate.The main characteristics of the seasonal mean H500,SAT,MSLP field can be simulated by most CGCMs.But there are significant systematic errors in SAT,MSLP,HS00 fields in most models.On the whole,DKRZ OPYC is the best in simulating the present climate in East Asia.     

北半球冰川物质平衡变化的若干特征及其气候意义

根据北半球连续观测的４０多条冰川物质平衡资料，分析了目前冰川物质平衡状态及影响它们的地形因互。冰川物质平衡的变化在区域间存在着一定的联系：斯堪的纳维亚、落基山和天山地 区冰川物质平衡的变化在大多数时间内存在着对应联 系，而与阿尔卑斯山冰川物质平衡的变化具有不同程度的反向波动特征。     

Climate change and multi-dimensional sustainable urbanization

Global large-scale urbanization and climate change have become indisputable scientific facts yet are unresolved issues, and are a common concern for mankind. The relationship between these two topics is unclear and it is not known how to deal appropriately at the scientific level with climate change in the process of urbanization. Further exploration of the science, management and practice, are needed to achieve global and regional sustainadevelopment. This paper first considers the basic facts concerning mass urbanization and climate change and summarizes the interactions and possible mechanisms of urbanization and climate change. Urbanization leads to the heat island effect, an uneven distribution of precipitation and extreme weather, together with a local-regional-global multi-scale superposition effect, which aggravates the consequences of global climate change. The impact of climate change on urbanization is mainly manifested in aspects such as changes of energy consumption, mortality, and the spread of infectious diseases, sea level rise, extreme weather damage to infrastructure, and water shortages. This paper also briefly reviews relevant international research programs and action coalitions and puts forward an analysis framework multi-dimensional sustainable urbanization which can adapt to and mitigate climate change, from the perspective of the four key dimensions—population, land use, economy, and society. It is imperative that we strengthen the interdisciplinary activities involving the natural and social sciences, take urbanization and other human activities into consideration of the land-atmosphere system, and explore the human-land-atmosphere coupling process. The adaptation and mitigation from the perspective of human activities, as represented by urbanization, might be the most critical and realistic way to deal with climate change.     

冰川零平衡线处的物质平衡及其应用

论证了在稳定状态时的冰川平衡线即零平衡线ＥＬＡ０）处的比净平衡大致等于整个冰川的平均净平衡。提出了ＥＬＡ０的直接测定方法、误差范围以及利用冰川中值高度计算ＥＬＡ０的公式。认为可以利用ＥＬＡ０的特征简化冰川物质平衡的观测及计算，以及利用冰川编目资料大面积估算冰川物质平衡状况的可能性。