China Geology最新文献

{"title":"Metallogenic characteristics of Shitoukengde intrusion and its implications for Ni-Co-(Cu) sulfide mineralization in East Kunlun","authors":"Xue-peng Duan ,&nbsp;Fan-cong Meng ,&nbsp;Zong-qi Wang ,&nbsp;Xiao-fei Yu","doi":"10.31035/cg2023070","DOIUrl":"10.31035/cg2023070","url":null,"abstract":"<div><div>Xiarihamu deposit is the only super-large Ni-Co deposit found in East Kunlun orogenic belt (EKOB) until present. Shitoukengde (STKD) intrusion is considered to have the potential to become a large Ni-Co deposit in East Kunlun. In order to discuss the metallogenic potential, this study present petrographical, geochemical data, and zircon U-Pb dating for the STKD intrusion. The STKD intrusion is hosted within mafic-ultramafic rocks which contain peridotite, pyroxenite and gabbro, and mainly intruded into the marble of the Paleoproterozoic Jinshuikou Group. Harzburgite and orthopyroxenite are the main country rocks for the Cu-Ni sulfide mineralization. Combine with the positive <em>ε</em>_Hf(t) values (+1.1 to +8.6) of zircons, the enrichment of LILEs, depletion of HFSEs, and lower Ce/Pb ratios of whole rocks indicate that the parental magma was originated from the depleted asthenospheric mantle and experienced 5%–15% crustal contamination. Troctolite formed during the Early Devonian and it has weighted mean ²⁰⁶Pb/²³⁸U age of 412 Ma. Regional background information has indicated that the post-collisional extension setting has already existed during the Early Devonian, leading to the formation of STKD intrusion and Cu-Ni sulfide mineralization. STKD intrusion may have the potential to be one economic Cu-Ni sulfide deposit but seems unlikely to be a super-large one.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"7 4","pages":"Pages 714-729"},"PeriodicalIF":4.6,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Arsenic and fluoride co-enrichment of groundwater in the loess areas and associated human health risks: A case study of Dali County in the Guanzhong Basin","authors":"Rui-ping Liu ,&nbsp;Fei Liu ,&nbsp;Hua-qing Chen ,&nbsp;Yu-ting Yang ,&nbsp;Hua Zhu ,&nbsp;You-ning Xu ,&nbsp;Jian-gang Jiao ,&nbsp;Refaey M El-Wardany","doi":"10.31035/cg2024015","DOIUrl":"10.31035/cg2024015","url":null,"abstract":"<div><div>This study aims to reveal the occurrence and origin of typical groundwater with high arsenic and fluoride concentrations in the loess area of the Guanzhong Basin—a Neogene faulted basin. Key findings are as follows: (1) Groundwater samples with high arsenic and fluoride concentrations collected from the loess area and the terraces of the Weihe River accounted for 26% and 30%, respectively, of the total samples, with primary hydrochemical type identified as HCO₃-Na. The karst and sand areas exhibit relatively high groundwater quality, serving as preferred sources for water supply. It is recommended that local governments fully harness groundwater in these areas; (2) groundwater with high arsenic and fluoride concentrations in the loess area and the alluvial plain of rivers in Dali County is primarily distributed within the Guanzhong Basin, which represents the drainage zone of groundwater; (3) arsenic and fluoride in groundwater originate principally from natural and anthropogenic sources; (4) the human health risk assessments reveal that long-term intake of groundwater with high arsenic and fluoride concentrations pose cancer or non-cancer risks, which are more serious to kids compared to adults. This study provides a theoretical basis for the prevention and treatment of groundwater with high arsenic and fluoride concentrations in loess areas.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"7 3","pages":"Pages 445-459"},"PeriodicalIF":4.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142419035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Muscovite 40Ar/39Ar isotopic dating of pegmatite veins in the Bieyesamas rare metal deposit in the Altay Mountain, Xinjiang, northwestern China","authors":"","doi":"10.31035/cg2023044","DOIUrl":"10.31035/cg2023044","url":null,"abstract":"","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"7 3","pages":"Pages 589-591"},"PeriodicalIF":4.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79772502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Discovery of scheelite in the Zaozigou gold deposit of West Qinling Orogen, Northwest China and its implications for ore genesis","authors":"Meng-xu Guo ,&nbsp;Jia-jun Liu ,&nbsp;De-gao Zhai ,&nbsp;Guo-ming Weng ,&nbsp;Rui Zhu","doi":"10.31035/cg2023099","DOIUrl":"10.31035/cg2023099","url":null,"abstract":"","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"7 3","pages":"Pages 586-588"},"PeriodicalIF":4.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142419127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preface to the special issue dedicated to the 37th International Geological Congress","authors":"Zi-guo Hao (Editor-in-Chief)","doi":"10.31035/cg2024083","DOIUrl":"10.31035/cg2024083","url":null,"abstract":"","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"7 3","pages":"Page 381"},"PeriodicalIF":4.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142419189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Depositional process of hyperpycnal flow deposits: A case study on Lower Cretaceous Sangyuan outcrop in the Luanping Basin, Northeast China","authors":"De-zhi Yan ,&nbsp;Ru-kai Zhu ,&nbsp;Hao Shou ,&nbsp;Zhao-hui Xu ,&nbsp;Wei-hong Liu ,&nbsp;Si-cheng Zhu ,&nbsp;Zhi-cheng Lei ,&nbsp;Jing-ya Zhang ,&nbsp;Chang Liu ,&nbsp;Yi Cai ,&nbsp;Huai-min Xu","doi":"10.31035/cg2023096","DOIUrl":"10.31035/cg2023096","url":null,"abstract":"<div><div>Sedimentary process research is of great significance for understanding the distribution and characteristics of sediments. Through the detailed observation and measurement of the Sangyuan outcrop in Luanping Basin, this paper studies the depositional process of the hyperpycnal flow deposits, and divides their depositional process into three phases, namely, acceleration, erosion and deceleration. In the acceleration phase, hyperpycnal flow begins to enter the basin nearby, and then speeds up gradually. Deposits developed in the acceleration phase are reverse. In addition, the original deposits become unstable and are taken away by hyperpycnal flows under the eroding force. As a result, there are a lot of mixture of red mud pebbles outside the basin and gray mud pebbles within the basin. In the erosion phase, the reverse deposits are eroded and become thinner or even disappear. Therefore, no reverse grading characteristic is found in the proximal major channel that is closer to the source, but it is still preserved in the middle branch channel that is far from the source. After entering the deceleration phase, normally grading deposits appear and cover previous deposits. The final deposits in the basin are special. Some are reverse, and others are normal. They are superimposed with each other under the action of hyperpycnal flow. The analysis of the Sangyuan outcrop demonstrates the sedimentary process and distribution of hyperpycnites, and reasonably explain the sedimentary characteristics of hyperpycnites. It is helpful to the prediction of oil and gas exploration targets in gravity flow deposits.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"7 3","pages":"Pages 505-516"},"PeriodicalIF":4.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142419038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Contamination assessment, source apportionment and associated health risks of PTEs in agricultural soil under five land-use patterns in Sanya, China","authors":"Jian-zhou Yang ,&nbsp;Yan-gang Fu ,&nbsp;Qiu-li Gong ,&nbsp;Sheng-ming Ma ,&nbsp;Jing-jing Gong ,&nbsp;Jian-weng Gao ,&nbsp;Zhenliang Wang ,&nbsp;Yong-wen Cai ,&nbsp;Shi-xin Tang","doi":"10.31035/cg2023078","DOIUrl":"10.31035/cg2023078","url":null,"abstract":"<div><div>To understand the levels of potentially toxic elements (PTEs) contamination in soils and their effects on human health from different agricultural land use in Sanya, China. 128 soil samples (64 topsoil samples and corresponding subsoil samples) were collected from the five representative land-use patterns. Inductively coupled plasma mass spectrometry (ICP-MS), Atomic fluorescence spectrometry (AFS), and Inductively coupled plasma optical emission spectrometry (ICP-OES) were used to determine the content of PTEs (As, Cd, Hg, Cu, Cr, Ni, Pb, Zn, Co, Mo, Sb, and V). Correlation analysis and factor analysis were used to determine the source of PTEs. Geo-accumulation index (<em>I</em>_geo), hazard quotient (HQ), and total carcinogenic risk index (TR) were used to measure the PTEs contamination and its relative health impacts. Results showed that the average values of 12 PTEs in topsoil were higher than the Hainan soil geochemical baseline, showing different degrees of PTEs accumulation effect. The concentration of PTEs in the topsoil was lower than those in the subsoil except for Cd and Hg. The <em>I</em>_geo revealed that the major accumulated element in soils was As followed by Mo. Source apportionment suggested that parent materials and agricultural practices were the dominant factors for PTEs accumulation in the topsoil. Non-carcinogenic risks of soil samples from five land-use patterns presented a trend of paddy field &gt; dry field &gt; woodland &gt; orchard &gt; garden plot. However, the HQ values of 12 PTEs were less than the recommended limit of HQ = 1, representing that there are no non-carcinogenic risks of PTEs for children and adults in the study area. The TR values are within 6.95×10^–6–1.38×10^–5, which corresponds to the low level. Therefore the PTEs in the agricultural soil of the study area show little influence on the health status of the local population.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"7 3","pages":"Pages 469-479"},"PeriodicalIF":4.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142419037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Desert ecological control and ecological industrial construction: Practice and inspiration from China","authors":"Xue-zheng Gao ,&nbsp;Lu Liu ,&nbsp;Yun-tao Shang ,&nbsp;Fan-yu Qi","doi":"10.31035/cg2024081","DOIUrl":"10.31035/cg2024081","url":null,"abstract":"","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"7 3","pages":"Pages 596-604"},"PeriodicalIF":4.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142419128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-toxicity and health risk assessment of polycyclic aromatic hydrocarbons in surface sediments of Burullus Lake in Egypt","authors":"Hanan E Osman ,&nbsp;Mohamed H E El-Morsy ,&nbsp;Hazem T Abd El-Hamid","doi":"10.31035/cg2024065","DOIUrl":"10.31035/cg2024065","url":null,"abstract":"<div><div>Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants of growing concern due to their potential ecological and human health risks. This study presents a comprehensive assessment of PAHs contamination in the surface sediments of Burullus Lake, a vital and second largest delta lake in Egypt. The aim was to evaluate the eco-toxicity and potential health risks associated with the presence of these compounds. Surface seven sediment samples were collected from various drains in the southern part of Burullus Lake. Soxhlet extraction method was employed to extract PAHs (16PAHs) from the sediment sample. Analytically, target compounds were located using HPLC. The results showed that samples contained PAHs levels ranging from 0.038×10^–6 to 0.459×10^–6, which is considered heavily polluted by the European standard for PAHs pollution. Additionally, there was no apparent source of PAHs in the El-Khashah drain or the Brinbal Canal, as HPLC found none of the compounds. The most prevalent compound in sediment samples along the study area was fluoranthene. The diagnostic indices in the present study indicated that the hydrocarbons in the region originated from pyrolytic and man-made sources along the drains of Burullus Lake. The principal component analysis (PCA) and diagnostic ratios revealed that coal combustion and pyrolytic sources were responsible for the PAHs contamination in the surface sediments. The non-carcinogenic risk (<em>HI</em>), which is the product of the <em>HQs</em> for the adult and child populations, respectively, was calculated. <em>HI</em> values under 1, therefore, demonstrated that they had no carcinogenic effects on human health. <em>TEQs</em> and <em>MEQs</em> in the sediments of Burullus Lake do not have a cancer-causing impact on people. For the safety of nearby wildlife, aquatic life, and people, all activities that raise petroleum hydrocarbon levels in Burullus Lake must be adequately regulated and controlled. According to the ecological risk assessment, there is little chance that PAHs will be found in the sediments of Burullus Lake. This study underscores the urgent need for effective pollution control measures and regular monitoring of PAHs levels in Burullus Lake sediments to protect the aquatic ecosystem and public health. It also highlights the importance of considering eco-toxicity and human health risks in integrated risk assessments of PAHs-contaminated environments.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"7 3","pages":"Pages 460-468"},"PeriodicalIF":4.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142419036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of water-urban-agricultural-ecological land use pattern: A case study of Guanzhong Basin in the southern Loess Plateau of Shaanxi Province, China","authors":"","doi":"10.31035/cg2022068","DOIUrl":"10.31035/cg2022068","url":null,"abstract":"<div><div>Extensive land use will cause many environmental problems. It is an urgent task to improve land use efficiency and optimize land use patterns. In recent years, due to the flow decrease, the Guanzhong Basin in Shaanxi Province is confronted with the problem of insufficient water resources reserve. Based on the Coupled Ground-Water and Surface-Water Flow Model (GSFLOW), this paper evaluates the response of water resources in the basin to changes in land use patterns, optimizes the land use pattern, improves the ecological and economic benefits, and the efficiency of various spatial development, providing a reference for ecological protection and high-quality development of the Yellow River Basin. The research shows that the land use pattern in the Guanzhong Basin should be further optimized. Under the condition of considering ecological and economic development, the percentage change of the optimum area of farmland, forest, grassland, water area, and urban area compared with the current land use area ratio is +2.3, +2.4, −6.1, +0.2, and +1.6, respectively. The economic and ecological value of land increases by 14.1% and 3.1%, respectively, and the number of water resources can increase by 2.5%.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"7 3","pages":"Pages 480-493"},"PeriodicalIF":4.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135549712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}