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First discovery of gold in kimberlite in Xuzhou, Northern Jiangsu Province 苏北徐州金伯利岩中首次发现金
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2021-06-15 DOI: 10.1016/j.sesci.2020.08.001
Qi Hou , Xiaoyong Yang , Jun Tang , Jingya Cao , Jianbin Shi , Qizhong Zhou
{"title":"First discovery of gold in kimberlite in Xuzhou, Northern Jiangsu Province","authors":"Qi Hou ,&nbsp;Xiaoyong Yang ,&nbsp;Jun Tang ,&nbsp;Jingya Cao ,&nbsp;Jianbin Shi ,&nbsp;Qizhong Zhou","doi":"10.1016/j.sesci.2020.08.001","DOIUrl":"10.1016/j.sesci.2020.08.001","url":null,"abstract":"<div><p>Several individual particle native golds were observed in two Mesozoic Group II kimberlites dikes in the southeastern margin of North China Craton (NCC). This discovery provides new information of the nature of the Mesozoic lithospheric mantle beneath the southeastern NCC, the metallogenic setting of gold deposits in the Jiaodong peninsula and the metallogenic theory of decratonic gold deposits.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sesci.2020.08.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45527700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Geochronological and geochemical constraints on the origin of the Mesozoic granitoids in the Fanchang volcanic basin, the Middle-Lower Yangtze Metallogenic Belt 中下扬子成矿带繁昌火山盆地中生代花岗岩类成因的年代学和地球化学约束
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2021-06-15 DOI: 10.1016/j.sesci.2020.12.002
Songsong Zhang , Xiaoyong Yang , Keyou Wang , Changsheng Han , Yunlou Yang
{"title":"Geochronological and geochemical constraints on the origin of the Mesozoic granitoids in the Fanchang volcanic basin, the Middle-Lower Yangtze Metallogenic Belt","authors":"Songsong Zhang ,&nbsp;Xiaoyong Yang ,&nbsp;Keyou Wang ,&nbsp;Changsheng Han ,&nbsp;Yunlou Yang","doi":"10.1016/j.sesci.2020.12.002","DOIUrl":"10.1016/j.sesci.2020.12.002","url":null,"abstract":"<div><p>The Fanchang volcanic basin is located between the ore-cluster districts of Tongling and Ningwu,the Middle-Lower Yangtze Metallogenic Belt (MLYMB), regionally. This study extends a set of methods,i.e., petrographic observations, chemical compositions of intrusive rocks and LA-ICP-MS analysis of magmatic zircons, zircon LA-ICP-MS U-Pb geochronology and whole-rock Sr-Nd isotope analysis, on several intrusive rocks, such as Baimashan, Xiangxingdi, Zhuhouling, Chichong, Suishan, Puyingshan and Zishanling. In detail, in this area, monzonite, quartz diorite, granite and syenite are characterized by a series of high-K calc-alkaline and shoshonite, with a positive anomaly in Rb, Th, U, Ce, Pb, Nd, Sm, Gd and a negative anomaly in Ba, Nb, Ta, Sr, P, Ti, plus LREE enrichments and a flattened right-dip of HREE. Moreover, the diagenesis ages of these intrusions mainly overlap the 128–121 Ma time, all but two exceptions, including Baimashan quartz dioritic porphyrite (138.5 ± 4.9 Ma) and Puyingshan diorite (132.1 ± 3.8 Ma). Interestingly, the inherited zircon ages in the Baimashan intrusion are polyphased, primarily in three intervals, 2211.1–2675.9 Ma, 1862.0–2057.1 Ma and 661.1–990.7 Ma, respectively, indicating diachronic magmatic sources and possible existence of the late-Archean and Proterozoic basements. In addition, crystallization temperatures of these intrusive rocks in the Fanchang volcanic basin significantly increase from 802 °C to 931 °C, while the values of (Ce<sup>4+</sup>/Ce<sup>3+</sup>)<sub>zircon</sub> decrease from 192.34 to 24.84, throughout the period from 132 Ma to 125 Ma, probably due to the enhanced magma assimilation process with the reductive carbonaceous wall rocks. Furthermore, A-type granites in this area, as defined in this paper, would have been derived from the partial melting of the residues of the early I-type granite source area. Values of (<sup>S7</sup>Sr/<sup>86</sup>Sr)<sub>i</sub> array between 0.70718 and 0.72642 (a.v. 0.70970) and <em>ε</em>Nd(<em>t</em>) between −14.0 and 2.2 (a.v. −7.1). In brief, the intrusive rocks in Fanchang volcanic basin is considered to have characteristics of both enriched mantle and lower crust and a strong assimilation process had occurred.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sesci.2020.12.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41522076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
The deformation and mechanisms of the Zhangbaling tectonic belt during Indosinian to early Yanshanian: Implications for the relationship with the Tan-Lu Fault Zone 印支期—燕山早期张巴岭构造带的变形与机制:与郯庐断裂带关系的启示
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2021-06-15 DOI: 10.1016/j.sesci.2020.08.004
Qi Hou , Xiaoyong Yang , Mingjin Hou
{"title":"The deformation and mechanisms of the Zhangbaling tectonic belt during Indosinian to early Yanshanian: Implications for the relationship with the Tan-Lu Fault Zone","authors":"Qi Hou ,&nbsp;Xiaoyong Yang ,&nbsp;Mingjin Hou","doi":"10.1016/j.sesci.2020.08.004","DOIUrl":"10.1016/j.sesci.2020.08.004","url":null,"abstract":"<div><p>The Zhangbaling tectonic belt is located in the middle segment of Dabie-Sulu Orogenic Belt and in the eastern part of the main segment of the Tan-Lu Fault Zone (TLFZ). Based on detailed field work and comprehensive analysis, this study discussed the tectonic evolution mechanics of the Zhangbaling tectonic belt and the Tan-Lu Fault Zone as well as the relationship between them during Indosinian to early Yanshanian period. Three stages of tectonic deformation have been determined in the period from Indosinian to early Yanshanian in Zhangbaling area, i.e., a series of WNW and nearly EW trending tight congruous nearly recumbent folds formed in the early stage; a flatly ductile shearing zone formed mainly between Beijiangjun lithofm. and Xileng lithofm. in the middle stage and the demonstrate NNE trending wide flat folds and strong thrusting or napping from NW to SE formed in the last stage. The superimposition of these three deformation stages formed the basic tectonic framework of this area. The folding and thrusting (sliding in the front margin) was developed in the mid-upper crust (include sedimentary cover) during the period of subduction and collision processes between South China Block and North China Block, shows a progress deformation of the three stages during the period of Indosinian and early Yanshannian due to the conversion of the Tethyan to the Circle Pacific Ocean tectonic regimes. The Tan-Lu Fault Zone can be divided into two big development phases since Hercynian. The first phase is a fault zone sensu lato, as a boundary of a rifted cratonic margin (or basin) that shows a wide arc-shaped along the northeastern margin of the South China Block during Indosinian. The TLFZ of this period is a collision suture between South China Block and North China Block during Indosinian period, a thrust-napping fault zone belong to the Tethyan regimes sensu lato, as well as the southeast margin of the Zhangbaling tectonic belt. This big phase corresponds to the three stages deformation activities in Zhangbaling area. The second phase is a wrench fault system usually mentioned by most researchers, which belongs to the Pacific Ocean Cycle Regime sensu stricto since early Yanshanian to Himalayan periods.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sesci.2020.08.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48946289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Model of layered pattern formation in binary igneous systems 二元火成岩系统层状图案形成模式
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2021-06-15 DOI: 10.1016/j.sesci.2021.04.001
Jade Ghaoui , Ivan L'Heureux
{"title":"Model of layered pattern formation in binary igneous systems","authors":"Jade Ghaoui ,&nbsp;Ivan L'Heureux","doi":"10.1016/j.sesci.2021.04.001","DOIUrl":"10.1016/j.sesci.2021.04.001","url":null,"abstract":"<div><p>Centimeter to meter-scale repetitive patterns in composition and texture are sometimes observed in igneous systems. Examples are found in layered intrusions and multi-shelled orbicular granites. These patterns may result from the action of nonlinear self-organization processes in which the interplay between crystallization dynamics, diffusion and thermal conduction causes mineral and crystal size segregations. These mechanisms are analogous to the ones underlying the formation of Liesegang bands and lead to comparable features, such as a geometric progression of the band positions and the presence of doublets. We present here a comprehensive one-dimensional numerical model of Liesegang pattern formation process from binary eutectic melts in igneous systems. The model incorporates nucleation, growth and Ostwald ripening and is applied to both the layered intrusion and the orbicular granite configuration with appropriate simple geometries and cooling boundary conditions. The emergence of cyclic layering is described in terms of two key parameters that control the pattern formation: the scaled latent heat of crystallization (Stefan number) and the ratio of the thermal diffusivity to a characteristic diffusion coefficient (Lewis number). It is found that, in intrusions, a banding pattern compatible with the Liesegang spacing law is generated when the Stefan number is large and the Lewis number small, in agreement with previous studies. For orbicular granites with low Lewis number, we show that the band thickness and the crystal size increase with distance from the rim to the core, in agreement with the observations of Zhang and Lee (2020). This suggests that the pattern progresses inwards from the outer boundary, rather than from a colder core, thus supporting the conceptual model reported in Zhang and Lee (2020). Moreover, the results for both geometries indicate that ripening plays an important role in the formation of realistic patterns.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sesci.2021.04.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47437458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Formation and preservation of the Bayan Obo Fe-REE-Nb deposit, Inner Mongolia: Insights from evidences of petrogenesis, geochemistry and apatite fission track dating 内蒙古白云鄂博Fe-REE-Nb矿床的形成与保存:来自岩石成因、地球化学和磷灰石裂变径迹测年的启示
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2021-06-15 DOI: 10.1016/j.sesci.2020.08.002
Pengfei Tian , Xiaoyong Yang , Wanming Yuan
{"title":"Formation and preservation of the Bayan Obo Fe-REE-Nb deposit, Inner Mongolia: Insights from evidences of petrogenesis, geochemistry and apatite fission track dating","authors":"Pengfei Tian ,&nbsp;Xiaoyong Yang ,&nbsp;Wanming Yuan","doi":"10.1016/j.sesci.2020.08.002","DOIUrl":"10.1016/j.sesci.2020.08.002","url":null,"abstract":"<div><p>The Bayan Obo ore deposit in Inner Mongolia, North China, the largest-known rare earth element (REE) deposit in the world, has attracted considerable attention over the past decades. However, its genesis has been highly debated, especially whether the host dolomite is of sedimentary or igneous origin. In this study, we present a comprehensive study on field geology, petrographic, geochemical, and apatite fission track analyses on REE-mineralized dolomite (H8) and its wall-rock (H9), in an effort to provide additional insights into the formation and preservation of this giant ore deposit. According to field geology and petrology analyses, the ore-hosted dolomite of the H8 unit in/around the Bayan Obo deposit displays the characteristics of sedimentary carbonates and demonstrates complicated deformation and hydrothermal events that resulted in the complex REE mineralization. The parameter of w(As) in pyrite ranging from 100 to 1600 ppm suggesting that the pyrite of the Bayan Obo deposit was mainly formed in a hydrothermal environment, and the thermal event from pyrite at ~440 Ma may represent the mineralization event of the Bayan Obo deposit, or it is an important disturbance event after the mineralization of the deposit. The geochemical research depicts that the evolution process of carbonatite was originated from calcium carbonatites and magnesio-carbonatites to ferro-carbonatite, indicating that the different genesis models of the Bayan Obo deposit that ranging from sedimentary carbonate to volcano-sedimentary and igneous carbonatites are reasonable. The two apatite ages obtained from granite on the east side of the Bayan Obo deposit and the dolomite in the Bayan Obo deposit are ~173 Ma and ~54 Ma, respectively. Time–temperature (<em>t–T</em>) histories of rocks yield new information about the timing of deformation of the Bayan Obo deposit, implying that the east side of the deposit experienced a rapid cooling process between ~300 Ma to ~54 Ma (especially ~300–180 Ma), this reflects the granite underwent a rapid cooling process which coeval with the plate subduction during the closure of the Palaeo-Asian Ocean, while the tectonic movement has little effect on the broken of the H8 dolomite in the mining area. Although the slate of the H9 unit from the east of the Bayan Obo deposit experienced a strong fragmentation in the later tectonic movement, it still made a great contribution to the mineralization for better preservation of REE-rich fluids, leading to the formation of the giant Fe-REE-Nb deposit.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sesci.2020.08.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45171758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Investigating and modelling ground settlement response to groundwater dynamic variation in parts of Lagos using space-based retrievals 利用天基检索对拉各斯部分地区地下水动力变化的地面沉降响应进行调查和建模
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2021-06-15 DOI: 10.1016/j.sesci.2021.03.001
Femi Emmanuel Ikuemonisan, Vitalis Chidi Ozebo, Olawale Babatunde Olatinsu
{"title":"Investigating and modelling ground settlement response to groundwater dynamic variation in parts of Lagos using space-based retrievals","authors":"Femi Emmanuel Ikuemonisan,&nbsp;Vitalis Chidi Ozebo,&nbsp;Olawale Babatunde Olatinsu","doi":"10.1016/j.sesci.2021.03.001","DOIUrl":"10.1016/j.sesci.2021.03.001","url":null,"abstract":"<div><p>Ground settlement has impacted many infrastructures in Lagos. Rapid urbanisation has further compounded this problem. Monitoring and modelling of ground settlement will provide actionable information that can help to mitigate this problem. In this study, space-based retrievals were used to investigate the magnitude and spatial distribution of ground settlement and the role of groundwater depletion in Lagos. Using the SBAS technique, the ground settlement rates were computed based on the Sentinel-1 data acquired between 2015–2019. The GRACE-derived groundwater head changes between 2002–2017 was quantified, and the ground settlement response to groundwater depletion was modelled. The highest recorded groundwater depletion rate was −11 mm/year, while the highest observed ground settlement rate was −94 mm/year, indicating an intense rate of ground settlement up to the end of 2019. The statistical correlation between ground settlement and groundwater head changes is in the order of 0.4, which is a moderate positive correlation indicating a partial correlation between ground settlement and groundwater depletion. To model settlement, a one-dimensional approach was used to simulate the response of ground settlement to changes in groundwater level. The simulated results fairly correspond to the magnitude of observed settlement, confirming that factors other than groundwater depletion partly control ground settlement in Lagos.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sesci.2021.03.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42272049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Rb–Sr dating and S–Sr–Nd isotopic constraints on the genesis of the Hehuashan Pb–Zn deposit in the Middle–Lower Yangtze River Metallogenic belt, China 长江中下游成矿带和华山铅锌矿床Rb-Sr定年及S-Sr-Nd同位素成因约束
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2021-06-15 DOI: 10.1016/j.sesci.2021.04.003
Guangxian Liu , Yufeng Deng , Feng Yuan , Xuejiao Chen , Bin Yang
{"title":"Rb–Sr dating and S–Sr–Nd isotopic constraints on the genesis of the Hehuashan Pb–Zn deposit in the Middle–Lower Yangtze River Metallogenic belt, China","authors":"Guangxian Liu ,&nbsp;Yufeng Deng ,&nbsp;Feng Yuan ,&nbsp;Xuejiao Chen ,&nbsp;Bin Yang","doi":"10.1016/j.sesci.2021.04.003","DOIUrl":"10.1016/j.sesci.2021.04.003","url":null,"abstract":"<div><p>The Hehuashan sediment-hosted Pb–Zn deposit is a large-scale (Pb + Zn>1 Mt) deposit hosted in the Tongling mining district of the Middle-Lower Yangtze River belt (MLYB). The Pb–Zn ore bodies are composed of two main mineralization types, namely breccia type and massive type. The breccia type ore bodies are hosted by the Triassic limestone and dolostone, while the massive ore bodies are hosted by marble dolostone which are close to the diorite intrusions. The previous research showed that the Hehuashan Pb–Zn deposit is a Mississippi Valley-type (MVT) deposit formed in Middle Triassic and overprinted by late mineralization of magmatic-hydrothermal fluids in Yanshanian period. In this research, we aimed to declare the age of the late mineralization and it's relationship with diorite intrusions. The mineralization age (132.8 ± 3.1 Ma) of the massive ore rocks (late mineralization) is similar to the zircon U–Pb age of the diorite (133–130 Ma), showing that this type mineralization is contemporaneous to the Yanshanian intrusive events. Furthermore, similar initial <sup>87</sup>Sr/<sup>86</sup>Sr values between sphalerite and diorite indicating a magmatic fluid was involved during the mineralization process and the emplacement of diorite also might have provided ore-forming materials. The heavy sulfur compositions (δ<sup>34</sup>S = +8.6‰ to +12.8‰) of the sphalerite in massive ore rocks indicate that the sedimentary sulfate may have provided reduced sulfur for sulfides precipitation by sulfate thermochemical reduction process. Sr–Nd isotopic compositions of the diorite in the Hehuashan deposit area showed that the massive Pb–Zn mineralization was related to the intrusion of diorite in an extensional tectonic setting. In summary, the Hehuashan Pb–Zn deposit composes a late Yanshanian Pb–Zn mineralization event and represents a younger Pb–Zn mineralization in the Tongling district and MLYB. The Triassic carbonates have the potential for Pb–Zn deposit exploration in the Tongling district and Middle–Lower Yangtze River belt.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sesci.2021.04.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47695898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Geo-electrically and hydrogeologically derived vulnerability assessments of aquifer resources in the hinterland of parts of Akwa Ibom State, Nigeria 对尼日利亚阿夸伊博姆州部分腹地含水层资源进行地电和水文地质脆弱性评估
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2021-06-15 DOI: 10.1016/j.sesci.2021.04.002
Nyakno Jimmy George
{"title":"Geo-electrically and hydrogeologically derived vulnerability assessments of aquifer resources in the hinterland of parts of Akwa Ibom State, Nigeria","authors":"Nyakno Jimmy George","doi":"10.1016/j.sesci.2021.04.002","DOIUrl":"10.1016/j.sesci.2021.04.002","url":null,"abstract":"<div><p>The study aims at employing geo-electrically and hydrogeologically derived indices to assess the vulnerability in an alluvial environment of Obot Akara and Nsit Atai counties in the hinterland of Akwa Ibom State, Southern-eastern Nigeria. Vulnerability maps have been generated using seven indices: depth to groundwater (D); net groundwater recharge (R); aquifer media (A); soil media (S); topography (T); impact of vadose zone (I) and hydraulic conductivity acronymized as DRASTIC. The DRASTIC vulnerability index (V) was computed as the sum of the product of weights and ratings. The results indicate that, for Obot Akara site, about 20% of the aquifer is classified as medium vulnerability, about 40% is high vulnerability and very high vulnerability. . For Nsit Atai, about 60% of the aquifer is classified as medium vulnerability while 20% represents high and very high vulnerability respectively. The results of the vulnerability assessment shows that the DRASTIC quality category in percentage is contributory from the seven parameters and hence avoidable anthropogenic activities leading contamination of groundwater should be avoided while the vulnerability maps should be employed to avoid locating boreholes in areas with very high vulnerability. With appropriate software programmes, ground-based geophysical data, hydrogeological and environmental inputs, the vulnerability assessment has been made to cover both the present and future exploitable groundwater resources for the healthy and economic benefits of human existence.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sesci.2021.04.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47470133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Geological characteristics and metallogenic age of Tengshan'ao Sn deposit in Dayishan of South Hunan and its prospecting significance 湘南大山腾山岙矿床地质特征、成矿时代及找矿意义
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2021-03-15 DOI: 10.1016/j.sesci.2021.01.002
Zunzun Zhang , Yongyun Ning , Youyue Lu , Jingya Cao , Jianming Fu , Zhuang Zhao , Jian Guo , Liyan Ma , Zhengwei Qin , Jianfeng Li
{"title":"Geological characteristics and metallogenic age of Tengshan'ao Sn deposit in Dayishan of South Hunan and its prospecting significance","authors":"Zunzun Zhang ,&nbsp;Yongyun Ning ,&nbsp;Youyue Lu ,&nbsp;Jingya Cao ,&nbsp;Jianming Fu ,&nbsp;Zhuang Zhao ,&nbsp;Jian Guo ,&nbsp;Liyan Ma ,&nbsp;Zhengwei Qin ,&nbsp;Jianfeng Li","doi":"10.1016/j.sesci.2021.01.002","DOIUrl":"10.1016/j.sesci.2021.01.002","url":null,"abstract":"<div><p>The Tengshan'ao Sn deposit, located at the Dayishan ore field, Nanling Range, is one of the recently explored deposits in this region. In this study, LA-MC-ICP-MS cassiterite U–Pb and muscovite <sup>40</sup>Ar-<sup>39</sup>Ar isotopic dating analyses for altered granite-type Sn ores yielded ages of 156.7 ± 4.3 Ma and 151.1 ± 1.5 Ma, respectively. These ages are consistent to the LA-MC-ICP-MS zircon U–Pb age of the fine-grained two-mica monzogranite (158.2 ± 1.6 Ma), indicating a coeval magmatism and mineralization for the Late Jurassic Tengshan'ao Sn deposit. It is further demonstrated that the formation of this deposit is related to the Early Yanshanian (160-150 Ma) large-scale diagenesis and mineralization in Nanling Range. It is suggested that the late-stage fine-grained two-mica (muscovite) granite has an indicative significance for searching the altered granite type Sn polymetallic mineralization.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sesci.2021.01.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45458774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Corrigendum to “Yanshanian movementˮ induced by the westward subduction of the paleo–Pacific plate [Solid Earth Sciences Volume 5 (2) (2020) 103–114] “古太平洋板块向西俯冲引起的燕山运动”更正[固体地球科学第5卷(2)(2020)103–114]
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2021-03-15 DOI: 10.1016/j.sesci.2021.01.001
Zhe-Kun Zhang , Ming-Xing Ling , Wei Lin , Ming Sun , Weidong Sun
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