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Chinese Science Bulletin 2001年第22期46卷 1904-1908页

作者： CAI Yanjun, ZHANG Meiliang, PENG Zicheng, LIN Yushi, AN Zhisheng, ZHANG Zhaofeng & CAO YunningState Key laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710054, china karst dynamics laboratory, ministry of land and resources, guilin 541003, china Department of Earth and Space Science, University of Science & Technology of china, Hefei 230023, china State Key laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi’an China karst dynamics laboratory Ministry of Land and Resources Guilin China Department of Earth and Space Science University of Science & Technology of China Hefei China

A stalagmite from Qixing Cave, Guizhou Province was dated with the TIMS U-series method and its oxygen isotope composition was analyzed. On the basis of the ages and the variations of the δ18O of the stalagmite, the climate change of the last 7.7 ka has been reconstructed in this area: 7.7-5.8 ka, summer monsoon maximum period; 5.8-3.8 ka summer monsoon weakening period; 3.8-0.15 ka, weakened summer monsoon and high amplitude climate fluctuations period. We put forward that the increasing trend of δ18O of the stalagmite reflected not only the weakening of the summer monsoon, which was caused by the decreasing of solar radiation in the Northern Hemisphere, but also the possibly decreasing contribution of the southwest monsoon to the rainfall of this area. These results are consistent with the output of the numerical climate-model modeling. The high amplitude fluctuation of the δ18O may imply the quick shift of the contributions of different moisture sources to the precipitation in this area.

关键词： stalagmite Holocene southwest monsoon.

Foreword for the special topic “Geological Processes in Carbon Cycle”

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Chinese Science Bulletin 2011年第35期56卷 3741-3742页

作者： YUAN DaoXian Institute of karst Geology,Chinese Academy of Geological Sciences,karst Dynamic laboratory,ministry of land and resources,guilin 541004,china Institute of karst Geology Chinese Academy of Geological Sciences Karst Dynamic Laboratory Ministry of Land and Resources Guilin China

Discussions of the relationship between global climate change and the increase in atmospheric greenhouse gas concentration have attracted public attention to the Earth's carbon cycle. The

关键词：碳循环地质过程专题温室气体浓度全球气候变化大气地球

Variation of δ^(13)C in karst soil in Yaji karst Experiment Site, guilin

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Chinese Science Bulletin 2002年第6期47卷 500-503页

作者： PAN Genxing, HE Shiyi, CAO Jianhua, TAO Yuxiang & SUN YuhuaCollege of Resource and Environment Science, Nanjing Agricultural University, Nanjing 210095, china karst Dyanmics laboratory, ministry of land and resources, guilin 541004, china College of Resource and Environment Science Nanjing Agricultural University Nanjing China karst Dyanmics laboratory Ministry of Land and Resources Guilin China

This study deals with δ13C variation in karst soil system of Yaji karst Experiment Site, guilin, a typical region of humid subtropical karst formations. Samples of near ground air, plant tissue, soil and water (soil solution and karst spring) were respectively collected on site in different seasons during 1996-1999. Considerable variation of δ13C values are not only found with different carbon pools of soil organic carbon, soil air CO2 and soil water HCO3-, but also with the soil depths and with different seasons during a year. The δ13C values of CO2 both of near ground air and soil air are lower in July than those in April by 1‰-4‰ PDB. Our results indicate that the δ13C values of carbon in the water and air are essentially dependent on interface carbon interaction of air-plant-soil-rock-water governed by soilorganic carbon and soil CO2 in the system.

关键词： karst soil carbon δ13C.

On the karst Ecosystem

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On the Karst Ecosystem

The Formation Mechanism of Hydrogeochemical Features in a karst System During Storm Events as Revealed by Principal Component Analysis

The First International Conference on Sustainable Development in karst Regions & International Working Group Meeting of IGCP 448 World Correlation of karst Ecosystems

作者： Yuan Daoxiankarst dynamics laboratory, ministry of land and resources guilin 541004, Guangxi, china

In this paper the author gives a definition of the karst ecosystem and discusses thecharacteristics of the karst environment and karst ecosystem and the relationship between life andthe karst *** he clarifies the stru... 详细信息

关键词： karst ecosystem, carbonate rock, karst environment

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地学前缘 2009年第S1期16卷 33-34页

作者： Pingheng Yang Daoxian Yuan Kuang Yinglun,Wenhao Yuan,Peng Jia,Qiufang He 1.School of Geographical Sciences,Southwest University,Chongqing 400715,china. 2.laboratory of Geochemistry and Isotope,Southwest University,Chongqing 400715,china 3.The karst dynamics laboratory,ministry of land and resources,Institute of karst Geology,Chinese Academy of Geological Sciences,guilin 541004,china

The hydrogeochemical parameters of Jiangjia Spring,the outlet of Qingrnuguan underground river system(QURS) in Chongqing,were found responding rapidly to storm events in late April,2008.A total of 20 kinds of hydrogeo... 详细信息

关键词： rainfall principal component analysis(PCA) soil erosion agricultural activities karst hydrogeochemical feature Qingmuguan

Ultrahigh pressure (>7 GPa) gneissic K-feldspar (-bearing) garnet clinopyroxenite in the Altyn Tagh, NW china: Evi- dence from clinopyroxene exsolution in garnet

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Science china Earth Sciences 2005年第7期48卷 1000-1010页

作者： LIU Liang1,3, CHEN Danling1, ZHANG Anda1, SUN Yong1, WANG Yan1, YANG Jiaxi1,2 & LUO Jinhai1 1. Key laboratory of Continental dynamics of the ministry of Education of china, Northwest University, Xi’an 710069, china 2. College of Earth Science and land resources, Chang’an University, Xi’an 710054, china 3. The laboratory of Orogen and Basin of the ministry of Education, Peking University, Beijing 100871, china Key laboratory of Continental dynamics Ministry of Education of China Northwest University Xi'an 710069 China laboratory of Orogen and Basin Ministry of Education Peking University Beijing 100871 China College of Earth Science and land resources Chang'an University Xi'an 710054 China

The exsolution of clinopyroxene and rutile in coarse-grain garnet is found in the gneissic K-feldspar(-bearing) garnet clinopyroxenite from Yinggelisayi in the Altyn Tagh, NW china. The maximum content of the exsolved clinopyroxene in the garnet is up to >5% by volume. The reconstructed precursor garnet (Grt1) before exsolution has a maximum Si content of 3.061 per formula uint, being of supersilicic or majoritic garnet. The peak-stage metamorphic pressure of >7 GPa is estimated using the geobarometer for volume percentage of exsolved pyroxene in garnet and the Si-(Al+Cr) geobarometer for majoritic garnet, and the temperature of about 1000℃ using the ternary alkali-feldspar geothermometer and the experimental data of ilmen- ite-magnetite solid solution. The protoliths of the rocks are intra-plate basic and intermediate ig- neous rocks, of which the geochemical features indicate that they are probably the products of the evolution of basic magma deriving from the continental lithosphere mantle. The rocks are in outcrops associated with ultrahigh pressure garnet-bearing lherzolite and ultrahigh pressure garnet granitoid gneiss. All of these data suggest that the ultrahigh pressure metamorphic rocks in the Altyn Tagh are the products of deep-subduction of the continental crust, and such deep- subduction probably reaches to >200 km in depth. This may provide new evidence for further discussion of the dynamic mechanism of the formation and evolvement of the Altyn Tagh and the other collision orogenic belts in western china.

关键词： Altyn Tagh gneissic K-feldspar (-bearing) garnet clinopyroxenite clinopyroxene exsolution in garnet ultra-high pressure metamorphism.

High-resolution climate variability of southwest china during 57―70 ka reflected in a stalagmite δ^(18)O record from Xinya Cave

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Science china Earth Sciences 2007年第8期50卷 1202-1208页

作者： LI TingYong1, YUAN DaoXian1,2, LI HongChun1,3 ,YANG Yan2, WANG JianLi1, WANG XinYa1, LI JunYun1, QIN JiaMing2, ZHANG MeiLiang2 & LIN YuShi2 1 College of Geographical Science, Southwest University, Chongqing 400715, china 2 karst dynamics laboratory, Institute of karst Geology, Chinese Academy of Geological Sciences, guilin 541004, china 3 Department of Earth Sciences, Cheng-Kung University, Tainan 70101, Taiwan, china College of Geographical Science Southwest University Chongqing China karst dynamics laboratory Institute of Karst Geology Chinese Academy of Geological Sciences Guilin China Department of Earth Sciences Cheng-Kung University Tainan Taiwan China

A 26-cm-long stalagmite (XY2) from Xinya Cave in northeastern Chongqing of china has been ICP-MS 230Th/U dated, showing a depositional hiatus at 2.3 cm depth from the top. The growth of the 2.3―26 cm interval determined by four dates was between 57 ka and 70 ka, with a linear growth rate of 0.023 mm/a. We have analyzed 190 samples for δ 18O and δ 13C, mostly in the 2.3―26 cm part. The δ 18O and δ 13C values between 57 ka and 70 ka reveal decadal-to-centennial climatic variability during the glacial in-terval of Marine Isotope Stage 4 (MIS4), exhibiting much higher resolution than that of the published Hulu and Dongge records during this interval. Speleothem δ 18O in eastern china, including our study area can be used as a proxy of summer monsoon strength, with lighter values pointing to stronger summer monsoon and higher precipitation, and vice versa. Two decreases in the δ 18O signature of XY2 record around 59.5 and 64.5 Ka are argued to correspond to the Dansgaard-Oeschger (D-O) events 17 and 18 respectively. The Heinrich event 6 (H6) can be identified in the record as a heavy δ 18O peak around 60 ka, indicating significant weakening of the monsoon in Chongqing during the cold period. The XY2 δ 18O record shows very rapid change toward to the interstadial condition of the D-O event, but more gradual change toward to the cold stadial condition. This phenomenon found in the Greenland ice core records is rarely observed so clearly in previously published speleothem records. According to SPECMAP δ 18O record, the glacial maximum of MIS 4 was around 64.5 ka with the boundary of MIS 3/4 around 60 ka. Unlike the marine record, the speleothem record of XY2, china, exhibits much high fre-quency variations without an apparent glacial maximum during MIS 4. However, the timing of MIS 3/4 boundary seems to be around 60 ka when the H6 terminated, in agreement with the marine chronology. The growth period of sample XY2 during glacial times probably reflects a local karstic routi

关键词： stalagmite U-series dating oxygen isotope records MIS4 D-O cycles H6 event Chongqing china

Developing on the karst dynamics Theory and the foundation of the International Research Center on karst under the Auspice of UNESCO

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中国岩溶 2009年第2期28卷 100-102页

作者： YUAN Daoxian(Institute of karst Geology,CAGS The Kars dynamics laboratory,MLR,guilin,Guangxi 541004,china)

Since 1990,four karst related IGCP Projects(IGCP 299,IGCP 379,IGCP 448 and IGCP 513)have been implemented successively by the author from the Institute of karst Geology,CAGS,as Leader of the International Working *** these four projects have provided opportunities for karst research communities worldwide to study together and solve resources and environment problems in the fields of karst formation,carbon cycle,

关键词： Dy Developing on the karst dynamics Theory and the foundation of the International Research Center on karst under the Auspice of UNESCO IGCP UNESCO

Insights into correlation between satellite infrared information and fault activities

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Progress in Natural Science:Materials International 2006年第4期16卷 394-402页

作者： MA Jin, WANG Yipeng, CHEN Shunyun, LIU Peixun and LIU Liqiang State Key laboratory of Earthquake dynamics, Institute of Geology, china Earthquake Administration, Beijing 100029, china State Key laboratory of Earthquake dynamics Institute of Geology China Earthquake Administration Beijing 100029 China

Tectonic activities are accompanied with material movement and energy transfer, which definitely change the state of thermal radiation on the ground. Thus it is possible to infer present-day tectonic activities based on variations of the thermal radiation state on the ground. The received satellite infrared information is, however, likely influenced by many kinds of factors. Therefore, the first problem that needs to be solved is to extract information on tectonic activities and eliminate effects of external (non-tectonic) factors. In this study, we firstly make a review of the current studies on this subject, and then present the technical approach and our research goal. Using the data of 20 years from the infrared band of the satellite of National Oceanic and Atmospheric Administration (NOAA) and the method we have developed, we investigate fault activities in western china. The results show that the areas with high residual values of land surface brightness temperature (LSBT), which is presumably related to faultings in space, accord usually with the locations of followed major earthquakes. The times of their value growing are also roughly consistent with the beginning of active periods of earthquakes. The low frequency component fields of the LSBT, acquired from wavelet analysis, exhibit well the spatial distributions of active faults. The "heat penetrability index" (HPI) related with enhancement of subsurface thermal information has been expressed well for the backgrounds of accelerated tectonic motions, and some correlations exist between HPI and the local faulting and seismicity. This study provides a new approach to study temporal-spatial evolution of recent activities of faults and their interactions.

关键词： infrared emission fault activity residual of land surface brightness temperature heat penetrability index.

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地下河系统水土资源关系

水土保持学报 2002年第6期16卷 50-53页

作者：谢运球袁道先中国地质大学湖北武汉430074 国土资源部岩溶动力学开放研究实验室中国地质科学院岩溶地质研究所桂林541004

中国南方地下河分布广泛,仅湘、川(渝)、黔、桂、滇、鄂等地就有流量>50L/s的地下河2444条。每一条地下河都构成一个相对独立的系统。因此,运用系统科学的方法开发利用地下河系统是解决南方岩溶区水土资源利用中长期存在的不合理现象的... 详细信息

中国南方地下河分布广泛,仅湘、川(渝)、黔、桂、滇、鄂等地就有流量>50L/s的地下河2444条。每一条地下河都构成一个相对独立的系统。因此,运用系统科学的方法开发利用地下河系统是解决南方岩溶区水土资源利用中长期存在的不合理现象的关键。初步分析了地下河系统的水土资源基本特征。山地多,耕地少,山高坡陡,土壤瘠薄,利用方式原始粗糙。降雨在不同的地下河系统中具有显著的时空不均一性,在同一系统的不同部位也存在着差异;地下河对暴雨响应灵敏。在此基础上探讨了地下河系统水土资源的基本格局以及相互关系。地下河系统具有独特的的水土分离格局,即"土在楼上,水在楼下"。土地资源的不同利用常常造成地下河的农药、化肥和细菌污染,引发雨后旱情。而地下河系统特殊的水资源特征叠加不适当的土地利用方式,加剧土地资源质的降低和量的流失,及土地资源的淹没。现状和成功的事例表明,地下河系统水土资源应该并且是可以合理利用而达到水、土、林、人的协调发展的。

关键词：地下河系统水土资源中国南方