Changqing Zhang

ORCID: 0000-0002-7619-7554
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Research Areas
  • Geochemistry and Geologic Mapping
  • Geological and Geochemical Analysis
  • earthquake and tectonic studies
  • Geochemistry and Geochronology of Asian Mineral Deposits
  • Geochemistry and Elemental Analysis
  • Digital Media and Visual Art
  • Heavy metals in environment
  • Higher Education and Teaching Methods
  • Hydrocarbon exploration and reservoir analysis
  • Soil Geostatistics and Mapping
  • Remote-Sensing Image Classification
  • Rock Mechanics and Modeling
  • Climate change and permafrost
  • Distributed Sensor Networks and Detection Algorithms
  • Blind Source Separation Techniques
  • Remote Sensing and Land Use
  • Economic Development and Regional Competitiveness
  • Cognitive Radio Networks and Spectrum Sensing
  • Mining and Resource Management
  • Heavy Metal Exposure and Toxicity
  • Environmental Quality and Pollution
  • Coal Properties and Utilization
  • Orthopedic Infections and Treatments
  • Mineralogy and Gemology Studies
  • Evaluation Methods in Various Fields

Shanghai Sixth People's Hospital
2025

Shanghai Jiao Tong University
2025

Heilongjiang Bayi Agricultural University
2024

Chinese Academy of Geological Sciences
2007-2023

Xidian University
2023

Xinyang College of Agriculture and Forestry
2023

Ministry of Natural Resources
2017-2023

Beijing Institute of Geology for Mineral Resources
2015

Chongqing Construction Engineering Investment Holding (China)
2013

China University of Geosciences (Beijing)
2010

The Hongniu-Hongshan Cu skarn deposit (77.8 Mt at 1.8% Cu) is located in the central part of Zhongdian porphyry and belt southwestern China. Skarn orebodies occur mainly between different units Upper Triassic Qugasi Formation or within altered limestone adjacent to Late Cretaceous intrusions (78–76 Ma). Three main paragenetic stages formation ore deposition have been recognized on basis petrographic observations: (1) pre-ore-stage hornfels with diopside (Di87–72Hd12–7), small-scale endoskarn...

10.2113/econgeo.111.6.1369 article EN Economic Geology 2016-06-17

Background Osteonecrosis of the femoral head (ONFH) is characterised by progressive bone death, leading to joint incongruity and eventual osteoarthritis. Various interventions have been explored forestall disease progression delay total hip arthroplasty (THA). Free vascularised fibula grafting (FVFG) has shown promise, particularly in precollapse stages ONFH. However, potential benefits combining synovectomy with FVFG address synovitis ONFH not systematically studied. This trial seeks...

10.1136/bmjopen-2024-089439 article EN cc-by-nc-nd BMJ Open 2025-02-01

The Chipu Mississippi Valley-type (MVT) deposit is located on the southwest (SW) margin of Sichuan Basin. Occurrence plentiful organic matter (bitumen) at this and abundant hydrocarbon reservoirs in SW Basin implies a link between lead–zinc mineralization systems area. high δ34S values most metal sulphides from different ore stages suggest that H2S-bearing gases and/or thermochemical sulphate reduction (TSR) by could have been source reduced sulphur involved formation. Sulphides with small...

10.1080/00206814.2012.753177 article EN International Geology Review 2012-12-20

The soil heavy metal pollution around the mine threatens crop growth and human health. Intensively studies of distribution characteristics source metals some typical mines are very crucial for environmental management green development mine. A total eighty-nine samples, twenty-one sediment five waste rock samples two tailing sand were sampled to investigate copper (Cu), lead (Pb), zinc (Zn), arsenic (As), cadmium (Cd), chromium (Cr) mercury (Hg) in soil, sediment, rocks tailings Dexing...

10.3390/su15021143 article EN Sustainability 2023-01-07

扬子板块周缘铅锌多金属成矿带内分布着数以百计的沉积岩容矿型铅锌矿床,它们不仅是我国主要的铅锌矿产地,同时也是重要的稀散元素(Ge、Ga等)生产基地。本次研究采用LA-ICPMS技术分别测定了扬子板块西南缘的会泽铅锌矿床、金沙厂铅锌矿床、大梁子铅锌矿床,扬子板块北缘的马元铅锌矿床以及扬子板块东南缘的凤凰茶田锌(铅)汞矿床中闪锌矿的微量元素组成,以揭示闪锌矿中微量元素(稀散元素)的富集规律和赋存状态,并为矿床成因类型的厘定及稀散元素矿产资源综合利用提供更多依据。LA-ICPMS微量元素测定结果显示闪锌矿中不同微量元素(稀散元素)分布不均匀,但这些矿床中闪锌矿总体以富集稀散元素Ge、Ga、Cd,贫In、Se、Tl、Te为特征,其Fe、Mn含量要明显低于与岩浆热液有关的高温闪锌矿,指示了扬子板块周缘铅锌矿床可能形成于中-低温成矿流体,而与岩浆热液无直接的成因联系,此外这些矿床中闪锌矿富Ge贫In的特征与其他的密西西比河谷型铅锌矿床(MVT)一致。同时,本次研究综合分析了闪锌矿中不同微量元素(稀散元素)之间的相关关系,并与闪锌矿微量元素LA-ICPMS时间分辨率特征相结合,研究表明:这些铅...

10.18654/1000-0569/2019.11.12 article ZH-CN Acta Petrologica Sinica 2019-01-01

Abstract In order to automatically detect the maturity of cherry fruits in natural environment 1 and realize automatic picking fruits, three levels fruit (Green ripening 2 stage, medium full stage) were formulated according changes 3 phenotypic characteristics mature stage company standard GH/T 1193-2021. Aiming at problem that difference adjacent cherries’ is not obvious mutual occlusion between an improved YOLO v8 model proposed for detection. this method, Dymatic Snake Convolution...

10.21203/rs.3.rs-3937772/v1 preprint EN cc-by Research Square (Research Square) 2024-02-12

Spectrum sensing can enable unauthorized users to "opportunistically" access an idle spectrum and effectively improve the utilization of resources. By using difference between cross-correlation absolute values receiving data in presence a signal only noise, blind (SS) algorithm based on value statistical cross correlation (test statistic) is proposed for multi-input–multioutput system. A theoretical analysis has shown that this method employ signals independence noise construct test...

10.1109/jsen.2023.3314103 article EN IEEE Sensors Journal 2023-09-18

锗作为一种稀散元素,是现代信息产业最重要的金属之一,然而大多数锗资源是在综合评价煤矿床、铅锌矿床以及铁矿床的过程中发现的,缺乏专门的找锗方法。为了进一步加强锗矿找矿方法的研究,本文以川滇黔接壤处作为研究区,通过采用探索性分析方法(EDA)和基于分形理论的浓度-面积(C-A)方法以及证据权模型,分析研究区内低密度水系沉积物测量数据Zn、Ge元素的数字特征和分布规律。结果表明:(1)Ge元素分布由单个总体构成,基本符合正态分布,数值变化小(变异系数=0.13),基本围绕地壳丰度值(1.6×10-6)波动,且矿床的分布与地球化学异常之间没有明显的相关关系,因此采用以Ge找Ge的思路是行不通的,而这可能是由于Ge在表生氧化状态下的多亲和性和高度分散性造成的。(2)Zn元素分布明显不符合正态分布,且有多个峰值,数据离散程度大(变异系数=1.14),可能至少由两个以上总体构成,且在空间上矿床的分布与地球化学异常之间有良好的相关关系,大多数矿床位于相对高值区。另外鉴于在原生状态下,Ge元素往往以类质同象的形式赋存在闪锌矿中,因此在区域上采用以Zn找Ge的思路是可行的。(3)采用累计概率法、直方...

10.18654/1000-0569/2019.11.10 article ZH-CN Acta Petrologica Sinica 2019-01-01

The porosity and permeability of the rock surrounding lead–zinc deposits are key factors for controlling migration precipitation ore-forming hydrothermal fluid. In this paper, Huize super-large deposit was taken as case study, variations in wall rocks their relationship with orebody were analyzed by using CT scanning technology. experimental results showed that average pore radius dolomite a decreasing distance to ranged from 1.60 1.65 μm, increasing 1.77~2.05 μm. increased 2.76%–2.81%...

10.3390/min13030363 article EN Minerals 2023-03-04

The Maliping large-scale Pb-Zn deposit is located in the Sichuan-Yunnan-Guizhou polymetallic metallogenic triangle area (SYGT), where ore body hosted interlayer fracture zone at interface between siliceous cataclastic dolomite and clastic rocks Lower Cambrian Yuhuchun Formation tectonically driven. Unlike other de-posits Sinian Carboniferous carbonate area, mechanism deep peripheral prospecting prediction research require further exploration. In this study, representative samples of a...

10.3390/min13060780 article EN Minerals 2023-06-07

The Laoyingqing zinc deposit is located in the Pb-Zn concentration district northeastern Yunnan, with a geotectonic location on southwestern edge of Yangtze block. This occurs interlayer fracture zone Huangcaoling Formation slate Middle Proterozoic Kunyang Group. In this deposit, significantly enriched compared to lead, and sulfur isotopic composition sphalerite shows δ34SCDT close negative values. These characteristics are different from common deposits that occur Sinian Carboniferous...

10.3390/min14010006 article EN Minerals 2023-12-19
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