Review of Earth Critical Zone Research   总被引：2，自引：0，他引：2  

An Peijun  Zhang Zhiqiang  Wang Liwei 《地球科学进展》2016,31(12):1228-1234

Since the Earth Critical Zone put forward by National Research Council of America in 2001, it has got a lot of attention and some significant progresses have been made. This paper summarized those Earth Critical Zone projects and related research plans organized and implemented by the United States of America, Germany, Australia, France, China and the European Union, as well as main scientific problems and future development direction in the study of Earth Critical Zone. According to research status of China, the four main research contents should be strengthened including structure, formation and evolution mechanism of Earth Critical Zone, the coulpling interaction mechanism between migration and transformation of material and multi-processes, sevice function and evolution features of Earth Critical Zone and its support and effect on sustainable development, model simulation of process and system of Earth Critical Zone. In addition, our country should actively conduct cooperation and communication with the advanced countries, and enhance our involvement in international key research plans.  相似文献   

Australian Wetland Water Environment Management and Technology Dynamic Integration     

An Zhengtao  Wei Yongping 《地球科学进展》2016,31(2):213-224

Australian government attaches great importance to the management of wetland water environment and the implementation of advanced technology, and has made large processes in the recent decades. Australia is one of the best country in global for wetland management and technology implementation. Based on the analysis of Australian government working method for wetland water environment management, two wetland water environment management and technology dynamic integration cases, and on the comparason ofthe differences of wetland water environment management between the two countries, including Murray-Darling Basin (MDB) and Lake Eyre Basin (LEB), it can be concluded that the success of Australian wetland water environment management is because of the following reasons: the dynamic integration between department establishment and technology, the dynamic integration between public participation and monitoring technology, as well as the dynamic integration between innovation policy and advanced technology. Furthermore, entity management method such as Murray-Darling Basin Authority (MDBA) is more adaptable and has longer lifespan. Such virtual management method as Lake Eyre Basin Intergovernmental Agreement is more flexible and has lower cost. The lessons learned from Australian government can help China manage wetland water environment.  相似文献   

Active Characteristics and Paleoearthquakes in the West Kalpin Nappe Since the Holocene,SW Tianshan Mountain     

Li An  Ran Yongkang  Liu Huaguo  Xu Liangxin 《地球科学进展》2016,31(4):377-390

the Kalpin nappe is an important multiple thrust system. It is important to study the Cenozoic tectonic of the Tianshan Mountain. Holocene active characteristics and paleoearthquake of the Kalpin nappe can be used to evaluate the neotectonic of this area. In this paper, we accurately measured the fault scarp in the front of three thrust-fold faults and analyzed paleoearthquake events in the trenches of the Kalpin nappe. Using the ¹⁰Be exposure age, we obtained those geomorphic surface ages and paleoearthquake times. The result showed that the slip rates of the west Kalpintag fault, aozitag fault and the tuoketag fault were 1.45(+1.68/-0.44) mm/a, 0.81(+0.35/-0.19) mm/a and (0.3±0.05) mm/a, respectively since the Holocene. The slip rate indicated that the increased activity transferred from back-row fault to front-row fault and accorded with the piggy-back propagation model in the Tianshan Mountain. Displacements and recurrence intervals of paleoearthquakes was similar to the slip rate characteristics. It also showed paleoearthquakes in the front row fault were stronger than paleoearthquakes of the back row fault. The strong paleoearthquake which caused the highest surface rupture happened in the Kalpintag fault. The interval of paleoearthquakes was about 4 ka and the displacement of every paleoearthquake was about 3 m in the west Kalpintag fault; the interval of paleoearthquakes was about 2 ka and the displacement of every paleoearthquake was about 1m in the aozitag fault; the tuoketag fault ruptured only one paleoearthquake since 7 ka. The Piqiang tear fault was the tectonic result of different shortening rate between the west Kalpin system and the east Kalpin system. The shortening rate of west Kalpin system was obviously stronger than the east Kalpin system. The huge separation distance was near 20 km between the east and the west back-row fault. Because the slip rate of system transferred to the front-row fault in the piggy-back propagation model, the separation distance (~4 km) between the east and the west front-row fault was increasing.  相似文献   

我国石墨矿产地质特征及资源潜力分析   总被引：3，自引：0，他引：3  

肖克炎  孙莉  李思远  黄安 《地球学报》2016,37(5):607-614

石墨是我国重要的大宗优势非金属矿产,其既具有非金属矿物的一般性能,又兼有金属和有机塑料的某些特性,是用途广泛的特殊的非金属矿物原料,是我国新兴产业的重要原材料。我国石墨成因类型主要为区域变质型,其工业价值较大。文章通过对我国石墨矿产分布特征、成矿规律分析进而总结石墨资源潜力特征,认为我国黑龙江、内蒙古、四川等省资源潜力巨大,可实行保护性开采,从而获取经济效益。  相似文献   

Hydrothermal Fluid Sources of the Fengjia Barite–fluorite Deposit in Southeast Sichuan,China: Evidence from Fluid Inclusions and Hydrogen and Oxygen Isotopes          下载免费PDF全文

Hao Zou  Shou‐ting Zhang  An‐qing Chen  Yi Fang  Zhao‐fa Zeng 《Resource Geology》2016,66(1):24-36

The Fengjia barite–fluorite deposit in southeast Sichuan is a stratabound ore deposit which occurs mainly in Lower Ordovician carbonate rocks. Here we present results from fluid inclusion and oxygen and hydrogen isotope studies to determine the nature and origin of the hydrothermal fluids that generated the deposit. The temperature of the ore‐forming fluid shows a range of 86 to 302 °C. Our detailed microthermometric data show that the temperature during mineralization of the fluorite and barite in the early ore‐forming stage was higher than that during the formation of the calcite in the late ore‐forming stage. The salinity varied substantially from 0.18% to 21.19% NaCl eqv., whereas the density was around 1.00 g/cm³. The fluid composition was mainly H₂O (>91.33%), followed by CO₂, CH₄ and traces of C₂H₆, CO, Ar, and H₂S. The dominant cation was Na⁺ and the dominant anion Cl^‐, followed by Ca²⁺, SO₄^2‐, K⁺, and Mg²⁺, indicating a mid–low‐temperature, mid‐low‐salinity, low‐density NaCl–H₂O system. Our results demonstrate that the temperature decreased during the ore‐forming process and the fluid system changed from a closed reducing environment to an open oxidizing environment. The hydrogen and oxygen isotope data demonstrate that the hydrothermal fluids in the study area had multiple sources, primarily formation water, as well as meteoric water and metamorphic water. Combined with the geological setting and mineralization features we infer that the stratabound barite–fluorite deposits originated from mid–low‐temperature hydrothermal fluids and formed vein filling in the fault zone.  相似文献   

Investigations on physical properties and ablation processes of snow cover during the spring snowmelt period in the headwater region of the Irtysh River,Chinese Altai Mountains   总被引：1，自引：0，他引：1  

Wei Zhang  Yongping Shen  Ninglian Wang  Jianqiao He  An’an Chen  Jian Zhou 《Environmental Earth Sciences》2016,75(3):199

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Biological characteristics of the nitrobenzene-degrading strain NB1 during bioaugmentation of nitrobenzene-contaminated groundwater     

Yonglei An  Jialu Li  Na Liu 《Environmental Earth Sciences》2016,75(5):360

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Slow earthquakes,tectonic tremors,and rheology of the lower continental crust     

An Yin 《《地质学报》英文版》2018,92(Z1):3-3

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Development of the emerging electromagnetic methods for deep earth exploration     

Qingyun Di  Guoqiang Xue  Zhongxing Wang  Zhiguo An  Changmin Fu  Ruo Wang  Da Lei  Fayemi Olalekan 《《地质学报》英文版》2018,92(Z1):313-317

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Correlation analysis between drought indices and terrestrial water storage from 2002 to 2015 in China     

Yajie Zhang  Yao Li  Jing Ge  Gaopeng Li  Zhisheng Yu  Haishan Niu 《Environmental Earth Sciences》2018,77(12):462

Drought monitoring is a key topic in environmental monitoring and assessment although there is still a need to determine the correlation between drought monitoring indices and remote sensing products. We analyzed the correlation between the self-calibrating Palmer Drought Severity Index (sc_PDSI), the Standardized Precipitation Index and the Standardized Precipitation Evapotranspiration Index (SPEI) and terrestrial water storage monitored through the Gravity Recovery and Climate Experiment (GRACE) on a monthly timescale from 2002 to 2015 in China. As a consequence of anomalies in the soil water budget, the highly significant correlation between the sc_PDSI and the GRACE satellite-observed terrestrial water storage suggested that these two datasets are the most suitable for use in monitoring droughts. In comparing the three drought indices, the sc_PDSI was introduced as a means of drought monitoring in the Yangtze, Pearl, Huaihe, Southeast and Songhua River Basins, whereas the SPEI was found to be more applicable to other major river basins, such as the Inland River Basin. These diverse spatial behaviors are caused by the differences between the hydrological droughts characterized by these three drought indices.  相似文献