漳州热田地下热水的循环深度

漳州热田是我国东南沿海地区目前所见温度(121.5℃)最高的一个。热田地热地质、地球化学以及地温场的研究结果表明,漳州热田属于深循环对流型热田。为了计算热田的热水循环深度,本文采用管道模型的方法,利用热田中心钻孔的测温资料计算地下热水上涌的流速,利用热田内水化学资料计算热储温度,然后用图解法求出漳州热田热水的循环深度为3.4—4.0 km,为漳州热田的成因分析和热水资源的评价提供了依据。     

Redefining the Age of the Cenozoic Shanwang Formation in Shanwang Basin

<正>Objective The Shanwang Basin is a small Cenozoic sedimentary basin located in Linqu county,Shandong province.The Shanwang Formation,especially the diatomaceous shale member,contains diverse and finely preserved flora and fauna fossils(Fig.1).Previous paleontological study and radiometric dating show that it was formed in the Miocene.However,on the precise age of the formation,there are such different opinions as Late Miocene,Middle     

Metallogenetic characteristics of an unique uranium-tungsten mineralization zone

A polymetallic zone dominated by U-W mineralization was found in Northeast Guangxi. Distributed along the east contact zone of a complex granite mass, it extends for about 100 km in length, with more than fifty deposits and prospects embraced. The deposits show a wide range of genetic types, related to the granite, from magmatic (including pegmatite and skarn deposits) through hydrothermal mineralizations (hypo-, meso- and epithermal) all the way to tin placers, constituting a very intact metallogenetic series of granites. The epithermal U-W deposits are considered as a new type for their unique geological and geochemical characters, such as the paragenesis of U and W and the large time gap (> 40 Ma) between ore and granite. This project was financially supported by the Open Lab. of Ore Deposit Geochemistry, Chinese Academy of Sciences.     

On global climate warming

On global climate warming     

全球契约与企业应对气候变化

全面分析了气候变化给企业带来的机遇与挑战。全球契约的"关注气候"倡议为企业响应全球号召应对气候变化带来了机遇,全球契约是全球企业共同应对气候变化、实现企业社会责任和树立企业形象的良好平台。另外,通过调查研究分析了中国民营企业应对气候变化的现状,并提出了相关政策建议。     

静海地震台地磁加卸载响应比与邻区地震关系研究

研究分析了静海地磁台2002～2006年观测资料的加卸载响应比异常与邻区ML 4.0以上地震之间的关系,提出了适用于静海地磁台的地震分析预报异常形态特征和阈值判据.     

Effectiveness of pilot carbon emissions trading systems in China

China is in the process of establishing a national emissions trading system (ETS). Evaluating the implementation effectiveness of the seven pilot ETSs in China is critical for designing this national system. This study administered a questionnaire survey to assess the behaviour of enterprises covered by the seven ETS pilots from the perspective of: the strictness of compliance measures; rules for monitoring, reporting and verification (MRV); the mitigation pressure felt by enterprises; and actual mitigation and trading activities. The results show that the pilot MRV and compliance rules have not yet been fully implemented. The main factors involved are the lack of compulsory force of the regulations and the lack of policy awareness within the affected enterprises. Most enterprises have a shortage of free allowances and thus believe that the ETSs have increased their production costs. Most enterprises have already established mitigation targets. Some of the covered enterprises are aware of their own internal emission reduction costs and most of these have used this as an important reference in trading. Many enterprises have accounted for carbon prices in their long-term investment. The proportion of enterprises that have participated in trading is fairly high; however, reluctance to sell is quite pervasive in the market, and enterprises are mostly motivated to trade simply in order to achieve compliance. Few enterprises are willing to manage their allowances in a market-oriented manner. Different free allowance allocation methods directly affect the pathways enterprises take to control emissions.

Key policy insights

• In the national ETS, the compulsory force of ETS provisions should be strengthened.

• A reasonable level of free allowance shortage should be ensured to promote emission reduction by enterprises.

• Sufficient information should be provided to guide enterprises in their allowance management to activate the market.

• To promote the implementation of mitigation technologies by enterprises, actual output-based allocation methods should be used.

• The government should use market adjustment mechanisms, such as a price floor and ceiling, to ensure that carbon prices are reasonable and stable, so as to guide long-term low carbon investment.

     

Design of an adaptive GPS vector tracking loop with the detection and isolation of contaminated channels

GPS Solutions - In vector tracking loop (VTL), the relativity among received signals is exploited to deeply integrate the entire information within signal processing channels. However, the tracking...     

超文本电子地图集系统

介绍了超文本电子地图集系统HEAS的若干概念,分析了现有地理信息系统的优点和弱点,介绍了超文本电子地图集系统的特性和武测超文本电子地图集实验系统方面的研究成果。     

Stretching characteristics and its dynamic significance of the northern continental margin of South China Sea

To investigate the thinning of the whole crust, and the contribution of the upper versus lower crust to the stretching since Cenozoic, we calculated the stretching factor of the northern margin of South China Sea with data such as whole crustal thickness, depth of Cenozoic sedimentary basement and the horizontal displacement of faults. An isometric line drawing on whole crustal stretching factor is then obtained. Along the seismic Line 1530 in Baiyun sag, we also calculated the stretching factors of the upper and lower crust. The results suggest that the whole crustal thickness decreases seaward while the whole crustal stretching factor increases from shelf to slope. The Moho upwells highest beneath where the crust is thinned most. The value of the whole crustal stretching factor ranges from 1.5 to 6. Two areas were thinned intensely: the center of Yinggehai Basin, and the Baiyun sag in the Pearl River Mouth Basin. The calculation of the upper and lower crustal stretching factors from DSP1530 in Baiyun sag shows that the original crust of Baiyun sag should be thinned before deformation. Its pre-Cenozoic evolution as well as tectonic position during Cenozoic might be responsible for that.