Assessing the Surface-Layer Stability over China Using Long-Term Wind-Tower Network Observations     

Li  Jian  Guo  Jianping  Xu  Hui  Li  Jing  Lv  Yanmin 《Boundary-Layer Meteorology》2021,180(1):155-171

Boundary-Layer Meteorology - Surface-layer stability is important in many processes, such as in the surface energy budget, atmospheric pollution, and boundary-layer parametrizations. Most previous...  相似文献   

Magnetic structure and tectonic significance of the middle and lower reaches of the Yangtze River and the northern section of the Qinhang belt -- enhancement and detection of satellite magnetic data     

Zhang Chong  Lv Qingtian  Yan Jiayong 《《地质学报》英文版》2018,92(Z1):257-257

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Intelligent signal and noise separation (SNR) technology for near-surface 3D distributed spectral induced polarization exploration     

Liu Weiqiang  Wang zhihui  Lv Qingtian  Lin Pinrong  Chen Rujun 《《地质学报》英文版》2018,92(Z1):236-237

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Teleseismic Traveltime Tomography of the Upper Mantle Structure Beneath Southeastern China     

Danian Shi  Qingtian LV  Xiaoming Xu  Yongqian Zhang  Yao Xu  Jinhua Zhao  Yumin Gu 《《地质学报》英文版》2018,92(Z1):206-207

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Geochemical and isotopic characteristics of fluids in the Niutuozhen geothermal field,North China     

Jumei Pang  Zhonghe Pang  Min Lv  Jiao Tian  Yanlong Kong 《Environmental Earth Sciences》2018,77(1):12

Niutuozhen geothermal field is located in the Jizhong graben, belonging to the northern part of Bohai Bay Basin in North China. Chemical and isotopic analyses were carried out on 14 samples of the geothermal fluids discharged from Neogene Minghuazhen (Nm), Guantao (Ng), and Jixianian Wumishan (Jxw) formations. The δ²H and δ¹⁸O in water, δ¹³C in CH₄, δ¹³C in CO₂, and ³He/⁴He ratio in the gases were analyzed in combination with chemical analyses on the fluids in the Niutuozhen geothermal field. The chemical and isotopic compositions indicate a meteoric origin of the thermal waters. The reservoir temperatures estimated by chemical geothermometry are in the range between 60 and 108 °C. The results show that the gases are made up mainly by N₂ (18.20–97.42 vol%), CH₄ (0.02–60.95 vol%), and CO₂ (0.17–25.14 vol%), with relatively high He composition (up to 0.52 vol%). The chemical and isotopic compositions of the gas samples suggest the meteoric origin of N₂, predominant crustal origins of CH₄, CO₂, and He. The mantle-derived He contributions are calculated to be from 5 to 8% based on a crust–mantle binary mixing model. The deep temperatures in the Jxw reservoir were evaluated based on gas isotope geothermometry to be in the range from 141 to 165 °C. The mantle-derived heat fraction in the surface heat flow is estimated to be in the range of 48–51% based on ³He/⁴He ratios.  相似文献   

Correction to: A comparison of five methods in landslide susceptibility assessment: a case study from the 330-kV transmission line in Gansu Region,China     

Yunfeng Ge  Hongzhi Chen  Binbin Zhao  Huiming Tang  Zishan Lin  Zhiguo Xie  Le Lv  Peng Zhong 《Environmental Earth Sciences》2018,77(20):716

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Relationship model for the drilling parameters from a digital drilling rig versus the rock mechanical parameters and its application     

Qi Wang  Hongke Gao  Bei Jiang  Jun Yang  Zhijin Lv 《Arabian Journal of Geosciences》2018,11(13):357

Measuring rock mechanical parameters is an essential step for support design in an underground project. To quickly obtain the surrounding rock mechanical parameters at a construction site in real time using a digital drilling rig, a quantitative relationship between the drilling parameters and rock mechanical parameters should be defined. In this paper, based on the fracture characteristics of rock cutting, a relationship model for the drilling parameters of the digital drilling rig versus the rock mechanical parameters (DP-RMP model) is created. Based on the multi-function rock drilling test system developed by the authors, rock drilling tests for different drilling parameters and theoretical results are compared and analysed to prove the validity and accuracy of the DP-RMP model. Additionally, the influence laws of the cohesion and internal friction angle on the rock cutting drilling torque are investigated. Drilling parameters from the digital drilling rig-based rock mechanical parameter inversion method is proposed; the feasibility of this method is verified by rock drilling test results. The study provides a theoretical basis for quickly obtaining the rock mechanical parameters using drilling parameters on site in real time.  相似文献   

Research on Rare Cranes Population Response to Land Use Change of Nature Wetland     

Wenjuan Peng  Bin Dong  Shuangshuang Zhang  Hui Huang  Xiaokang Ye  Linna Chen  Qiang Zhou  Jing Wu  Cheng Wang  Ming Zhu  Kangkang Zhao  Dian Lv 《Journal of the Indian Society of Remote Sensing》2018,46(11):1795-1803

Shengjin Lake is the only national wetland nature reserve in Anhui Province with rare wintering waterbirds as the main protection object. In recent years, with the strengthening of human activities, the number of rare cranes has changed significantly. Taking the Shengjin Lake natural wetland as an example, this paper studied the response of crane population to land use change, which had important implications for the protection of cranes. This paper analyzed the land use of Shengjin Lake by referring to the eight periods of TM remote sensing images (1986, 1990, 1995, 2000, 2004, 2008, 2011 and 2015) and using ERDAS and ArcGIS tools. The diversity of bird habitats in Shengjin Lake nature reserve was analyzed. Combined with the changes in the number of rare cranes from 1986 to 2015, the impacts of land use and climate change on the cranes in protected areas were analyzed. The results showed that: there was a correlation between the number of cranes land use types and climate changes. The type of land of Shengjin Lake nature reserve was relatively small change in the early years in 1986. It was a relatively large change in the type of land, and the number of cranes had a significantly reducing in 1990s. It until 2000, the number of rare cranes had a slight rebound; however from 2012 to 2015, the number of cranes had dropped again. It had a greater influence on the number of cranes about the change of construction land, reeds mudflats, mudflats, marsh land and paddy fields in the wetland.  相似文献   

Ancient landslide in Wanzhou District analysis from 2015 to 2018 based on ALOS-2 data by QPS-InSAR     

Huang  Changjun  Zhou  Qingshan  Zhou  Lv  Cao  Yuanzhi 《Natural Hazards》2021,109(2):1777-1800

Natural Hazards - Landslide is a global environmental geological hazard caused by natural or human activities. Since the impoundment of the Three Gorges reservoir area, the geological disasters...  相似文献   

黑龙江六九铜矿区岩浆岩年代学及成矿指示意义     

杨元江  吕长禄  李科  高永志  于喜洹  李成禄  李文龙  程招勋  刘莉莉 《矿物岩石》2021,41(3):118-127

六九铜矿床位于黑龙江省大兴安岭成矿带中段,龙江铜、金、钼成矿亚带.为了探讨矿床的形成时代和研究该地区岩浆活动,本次对侵入矿体的英云闪长斑岩采用电感耦合等离子体质谱仪LA-ICP-MS锆石U-Pb定年,结果为122.96±0.93 Ma,由此可限定成矿时代上限,结合区域铜成矿规律,推测六九铜矿的成矿时代为晚侏罗世—早白垩世,成矿背景是蒙古—鄂霍茨克洋俯冲闭合有关的造山—造山后环境.对区内出露的绢英岩进行锆石U-Pb定年,结果为303.7±1.6 Ma,代表其原岩花岗闪长岩的结晶年代为晚石炭世晚期,结合区域地质调查成果,表明研究区自华力西晚期以来存在多期次岩浆活动.  相似文献