1Palaeo-tufa from the Liuhuanggou cave 2 in the Ordovician carbonate, North Tarim basin, China:Features and petroleum-geologic significancesZHONG Jianhua, SU Feifei, NI Liangtian, SHAO Zhufu, ZHANG Danfeng, SUN Ningliang, HAO Bing, CHEN Bin, LIU Chuang, LUO Ke1-142Porosity and permeability characteristics of compact Carboniferous limestone in the eastern Qaidam basinMA Longjie, PENG Bo, YU Qingchun15-223Fractal features of development degree of Ordovicia paleokarst in the Ordos basinFU Xunxun, LIU Xinshe, SHAO Xiaozhou, HU Jianling, JIA Li, CHE Yongfa23-314Evaluation and prediction of carbonate karst reservoirs in the Ordovician buried hills beneath the Tarim basin: An example east of the Lungu7 well blockZHANG Qingyu, LIANG Bin, QIN Fengrui, CAO Jianwen, DAN Yong, LI Jingrui32-415Numerical simulation of precipitation impact on fractured karst system evolutionMAO Liang, YU Qingchun, WANG Jingxia, LI Honghui, ZHAO Shuaiwei, JIA Meilan42-486Relationship between north Ji'nan geothermal water and Ji'nan spring water revealed by hydrogeochemical characteristicsSUI Haibo, KANG Fengxin, LI Changsuo, HAN Jianjiang, XING Liting49-587Hydrochemical characteristics and mixing effect in Tongjing hot springs of Chongqing59-668Discussion on karst groundwater migration law under mining conditions in the Yutianbao coalmine of Chongqing67-749Calibration of soil water content of calcareous soil using Time Domain Reflectometry (TDR) method in karst regions75-8010Variation of soil trace elements under peach trees with different planting ages in typical rocky desertification areasMO Biqin, YANG Hui, CAO Jianhua, LYU Quanbiao, ZHU Hao, BAI Bing81-8711Physical model of ground collapse of hourglass type in karst regionLUO Xiaojie, LUO Cheng88-9312Analysis of karst collapse development in Tai'an-Jiuxian water source areaWU Ya'nan94-10013Study on source-sink effect in the process of carbonate rock dissolved by acid rain:An example of typical karst regions in GuangxiSUN Ping'an, LI Xiucun, YU Shi, YUAN Yaqiong, HE Shiyi, WANG Yanxue101-10814Impact of tourism activities on the cave environment and landscape of calcium carbonate (CaCO3) deposits at Shuijinggong cave, Bama countyZHANG Meiliang, ZHU Xiaoyan, WU Xia, ZHANG Biyuan, PAN Moucheng119-13015Optimization of the lighting system at the Furong cave in ChongqingYANG Xiaoxia, WENG Zifan, XIANG Xu131-138 