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Compilation of fundamental parameters of earth 地球基本参数汇编
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2024-09-28 DOI: 10.1016/j.sesci.2024.100202
Sirui Liu , Jianghong Deng
{"title":"Compilation of fundamental parameters of earth","authors":"Sirui Liu ,&nbsp;Jianghong Deng","doi":"10.1016/j.sesci.2024.100202","DOIUrl":"10.1016/j.sesci.2024.100202","url":null,"abstract":"<div><div>Earth is a unique planet in the universe characterized by a stable crust and a dynamic internal environment, fostering intelligent life. Studying Earth not only aids in understanding our habitat but also helps uncover mysteries of other celestial bodies. Earth parameter data are essential for a comprehensive understanding of the planet. Here we compile and update key data on Earth's fundamental parameters, historical evolution, and the current geophysical parameters and geochemical compositions of its atmosphere, water, crust, mantle, and core. The data are sourced from a combination of historical records, satellite observations, and recent field studies, and have been validated using established geophysical and geochemical methodologies. We specifically examine the elemental compositions of various Earth layers and offer recommended values for certain datasets, aiming at easier accessing fundamental Earth data, thereby facilitating deeper exploration of Earth sciences.</div></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 4","pages":"Article 100202"},"PeriodicalIF":2.0,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142328048","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: 0
ECO: A new reference model of dry olivine electrical conductivity ECO:干橄榄石电导率的新参考模型
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2024-09-21 DOI: 10.1016/j.sesci.2024.100193
Xiaozhi Yang
{"title":"ECO: A new reference model of dry olivine electrical conductivity","authors":"Xiaozhi Yang","doi":"10.1016/j.sesci.2024.100193","DOIUrl":"10.1016/j.sesci.2024.100193","url":null,"abstract":"<div><p>Electrically Conductive Olivine, ECO, is presented as a new reference model for the electrical conductivity of dry olivine. The model takes into account the prevailing redox state, temperature and pressure in the upper mantle, as well as their effects on the conductivity, and is based on conductivity analyses of dry single crystal olivine at high pressures. The model demonstrates higher conductivity of olivine than those previously proposed standard olivine models, which rely on the conductivity of olivine measured at room pressure. Accepting that the bulk electrical structure is in general dominated by olivine, the upper mantle is more conductive than the estimates of the previous models. The olivine conductivity is in fact high at the oxidizing conditions of the shallow mantle, but drops at greater depths where the mantle portion is reducing. The model provides a new reference basis for understanding the electrical structure of the upper mantle, and is important for invoking any other conductive candidates to explain enhanced mantle conductivity.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 4","pages":"Article 100193"},"PeriodicalIF":2.0,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X2400031X/pdfft?md5=ffdfa2e9386bbd8f182c93bdd0f4c146&pid=1-s2.0-S2451912X2400031X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142271889","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: 0
High-precision measurement of trace-level Nb, Sn, Ta, and W in rutile using electron probe microanalysis 利用电子探针显微分析法高精度测量金红石中的痕量 Nb、Sn、Ta 和 W
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2024-09-01 DOI: 10.1016/j.sesci.2024.100197
Peng-Li He, Xiao-Long Huang, Le Zhang
{"title":"High-precision measurement of trace-level Nb, Sn, Ta, and W in rutile using electron probe microanalysis","authors":"Peng-Li He,&nbsp;Xiao-Long Huang,&nbsp;Le Zhang","doi":"10.1016/j.sesci.2024.100197","DOIUrl":"10.1016/j.sesci.2024.100197","url":null,"abstract":"<div><p>The composition of Nb, Sn, Ta, and W in rutile can serve as a highly sensitive indicator for the mineralization of these elements. This information could also be utilized to discriminate different stages of ore deposition or distinct types of deposits. Precise and accurate measurement of trace-level concentrations of these elements in rutile is imperative for such investigations, and can be effectively achieved using electron probe microanalysis (EPMA). In this study, we employed a CAMECA SX5 field emission EPMA to develop an optimal approach for precise and accurate analysis of trace-level Nb, Sn, Ta, and W in rutile. The analytical conditions include an accelerating voltage of 25 kV, a beam current of 200 nA, a beam diameter of 1 μm, optimized background positions for Nb Lα, Sn Lα, Ta Lα, and W Lα, and aggregate intensity counting with a peak counting time of 240 s for each element per spectrometer. The detection limits (3σ) for Nb, Sn, Ta, and W ranged from 22 to 53 ppm. The highest achievable spatial resolution was approximately 4.3 μm. Analytical results obtained from potential rutile standards R10 and R632 were consistent with previous studies within the errors. The precision of these results varied from 1% to 10% (1σ), excluding W in R10 and Nb and Ta in R632, which exceeds the precision achieved in previous EPMA studies. We recommend using R10 as a reference standard for analyses of trace-level Nb, Sn, and Ta, and R632 as an appropriate reference standard for Sn and W when quantifying rutile using EPMA.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100197"},"PeriodicalIF":2.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000357/pdfft?md5=0a0022e566dedf25b48b78b1a087febe&pid=1-s2.0-S2451912X24000357-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142095160","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: 0
Assessment of groundwater resources through hydrogeochemical investigation and multivariate chemometric statistics in Bagerhat district, Bangladesh 通过水文地质化学调查和多元化学计量统计评估孟加拉国巴格哈特地区的地下水资源
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2024-09-01 DOI: 10.1016/j.sesci.2024.100200
Sujan Mallik , Sukhen Goswami , Dhiman Kumer Roy , Md Jakir Hossain , Afroz Jahan , Ayon Saha , Abu Reza Md Towfiqul Islam
{"title":"Assessment of groundwater resources through hydrogeochemical investigation and multivariate chemometric statistics in Bagerhat district, Bangladesh","authors":"Sujan Mallik ,&nbsp;Sukhen Goswami ,&nbsp;Dhiman Kumer Roy ,&nbsp;Md Jakir Hossain ,&nbsp;Afroz Jahan ,&nbsp;Ayon Saha ,&nbsp;Abu Reza Md Towfiqul Islam","doi":"10.1016/j.sesci.2024.100200","DOIUrl":"10.1016/j.sesci.2024.100200","url":null,"abstract":"<div><p>Groundwater, a primary freshwater source for potable and agricultural uses, is increasingly threatened in southern coastal areas of Bangladesh because of rapid urbanization, industrialization, and climate change. Bagerhat, one of the coastal districts, faces not only frequent tropical cyclones, inundation of low-lying areas, and saline water intrusion but also rapid urbanization, population growth, and pollution from prawn culture and seafood processing industries. The study aims to assess the hydrogeochemistry and the suitability of groundwater based on its significance for potable and irrigation purposes in Bagerhat District. This research includes an integrated approach of hydrogeochemical, geospatial, and multivariate statistical methods to investigate the hydrogeochemical processes and groundwater quality using ninety groundwater samples from existing deep tube wells (around 350 m depth). The hydrogeochemical analysis determined the concentrations of major cations and anions were Na<sup>+</sup>&gt;Mg<sup>2+</sup>&gt; Ca<sup>2+</sup>&gt; K<sup>+</sup> and Cl<sup>−</sup> &gt; HCO<sub>3</sub><sup>-</sup> &gt; SO<sub>4</sub><sup>2−</sup> &gt; NO<sub>3</sub><sup>-</sup>, correspondingly. Electrical Conductivity (EC) values ranged from 16,260 μS/cm in the southern Mongla Upazila to a minimum of 560 μS/cm in Chitalmari Upazila. The evaporation–crystallization processes were found to be the primary mechanism influencing groundwater chemistry in the study area. Multivariate statistics, including Pearson correlation matrix, principal component analysis (PCA), and cluster analysis, indicated that geogenic processes govern groundwater chemistry. The spatial distribution of the water quality index (WQI) map demonstrated that only 15% of groundwater samples are suitable for drinking in the central and eastern parts, while 85% are unsuitable in the study area. Furthermore, evaluation of irrigation water quality parameters, such as sodium percentage (Na%), sodium adsorption ratio (SAR), Kelly ratio (KR), permeability index (PI), magnesium hazard (MH), and salinity hazard, indicated that most wells are unsuitable for irrigation. The results provide insights into aquifer hydrogeochemistry, groundwater quality status, vulnerable areas of pollution, and sustainable, safe water options for groundwater management in the Bagerhat district.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100200"},"PeriodicalIF":2.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000382/pdfft?md5=32e49ae6b1693a3c13c54f7bb6f61b99&pid=1-s2.0-S2451912X24000382-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142149380","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: 0
The origin and tectonic implications of the ca. 406 Ma magmatic activity in the western Yangtze Block, South China 华南西部扬子地块约 406 Ma 岩浆活动的起源及构造影响华南西部扬子地块约 406 Ma 岩浆活动的起源及其对构造的影响
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2024-09-01 DOI: 10.1016/j.sesci.2024.100198
Chun-Mei Liu , Hao Zou , Hai-Feng Chen , Chen-Wei Li , Nuru Said , Chang-Cheng Huang , Xing-Xing Mao , Hui-Dong Yu , Hua-Wen Cao , Xin-Yu Liu
{"title":"The origin and tectonic implications of the ca. 406 Ma magmatic activity in the western Yangtze Block, South China","authors":"Chun-Mei Liu ,&nbsp;Hao Zou ,&nbsp;Hai-Feng Chen ,&nbsp;Chen-Wei Li ,&nbsp;Nuru Said ,&nbsp;Chang-Cheng Huang ,&nbsp;Xing-Xing Mao ,&nbsp;Hui-Dong Yu ,&nbsp;Hua-Wen Cao ,&nbsp;Xin-Yu Liu","doi":"10.1016/j.sesci.2024.100198","DOIUrl":"10.1016/j.sesci.2024.100198","url":null,"abstract":"<div><p>In this study, we report for the first time a new gabbro diorite, forming in an intraplate extensional environment during the Early Devonian, in the Shimian of the western margin of the Yangtze Block. Zircon SIMS U–Pb dating indicates that the gabbro diorite formed at ca. 406 Ma. This gabbro diorite belongs to low-K tholeiite and has enriched in Rb, Ba, K, Pb, negative anomalies of Nb, Ta, depletion of flat LREE patterns, negative ε<sub>Hf</sub>(t) (−1.1 to −11.7), and high δ<sup>18</sup>O (8.83 ± 0.21‰) ratios, showing that the magma formed by partial melting of N-MROB-type mantle and indicating that the magma underwent crustal contamination during emplacement. The magma is formed in the extensional environment, which provides evidence for the extensional environment in the western margin of the Yangtze. The geochemical characteristics and emplacement time of the rocks are similar to those in the early Paleozoic post-orogenic mafic rocks in South China, suggesting that the gabbro diorite may be influenced by the early Paleozoic orogeny in South China.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100198"},"PeriodicalIF":2.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000369/pdfft?md5=41c004e24c85a86347e9cc45fb08a037&pid=1-s2.0-S2451912X24000369-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142117344","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: 0
The slab failure in Central Java (Indonesia): New insight into its tectonic setting and origin 中爪哇(印度尼西亚)的板块崩塌:对其构造背景和起源的新认识
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2024-08-26 DOI: 10.1016/j.sesci.2024.100199
Shaban Godang , Sugeng Purwo Saputro , Huan Li
{"title":"The slab failure in Central Java (Indonesia): New insight into its tectonic setting and origin","authors":"Shaban Godang ,&nbsp;Sugeng Purwo Saputro ,&nbsp;Huan Li","doi":"10.1016/j.sesci.2024.100199","DOIUrl":"10.1016/j.sesci.2024.100199","url":null,"abstract":"<div><p>The geochemical and tectonic characteristics of volcanic formations in Central Java, specifically the Sumbing-Slamet volcanics, were investigated to understand the processes associated with slab failure in the region. Through comprehensive geochemical analysis and comparison with other volcanic formations, insights into the magmatic evolution and tectonic settings of the Sumbing-Slamet volcanics were gained. The findings support the hypothesis of slab tearing beneath Central Java, as evidenced by distinct geochemical signatures and magmatic interactions observed in the Sumbing-Slamet volcanics. Geochemical data reveal medium to high potassium content (K<sub>2</sub>O = 0.77–2.32%), low Nb/Y (&lt;0.6561), low TiO<sub>2</sub> relative to Al<sub>2</sub>O<sub>3</sub> [TiO<sub>2</sub> &lt; (−1.1610 + 0.1935 × Al<sub>2</sub>O<sub>3</sub>)], Th/La &gt;0.2, as well as a wide range of Nb/La and Nb/Zr (0.14–0.89 and 0.0304–0.0744, respectively), notable depletions in high-field strength elements (HFSE; such as Nb, Ti), low to high Ta-anomaly (δTa = 0.21–1.03), and whole-rock isotopes of <sup>87</sup>Sr/<sup>86</sup>Sr (0.704458–0.705800) and <sup>143</sup>Nd/<sup>144</sup>Nd (0.513059–0.512766) demonstrate that they were formed from active continental margin (ACM) tectonics involving subducted sediment input. These magmatic processes likely resulted from the mixing of lithospheric and asthenospheric mantle sources due to slab failure in the northern part of Central Java. The research contributes to strengthening the geophysical view regarding the existence of slab tearing in Central Java, understanding the dynamic geological processes occurring in subduction zones, and emphasizing the importance of interdisciplinary approaches in studying such phenomena.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100199"},"PeriodicalIF":2.0,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000370/pdfft?md5=b60d2415e7471906eb6608946c006767&pid=1-s2.0-S2451912X24000370-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142077453","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: 0
Fusion of GIS, remote sensing, geophysics and Dempster Shafer theory of evidence for mapping groundwater prospectivity: A case study of the central parts of Lagos State, Nigeria 融合地理信息系统、遥感、地球物理和 Dempster Shafer 证据理论绘制地下水远景图:尼日利亚拉各斯州中部地区案例研究
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2024-08-20 DOI: 10.1016/j.sesci.2024.100196
K.S. Ishola , M.O. Bakare , A.I. Hamid-Mosaku , C.J. Okolie , K.T. Olagunju , O.M. Oshikoya
{"title":"Fusion of GIS, remote sensing, geophysics and Dempster Shafer theory of evidence for mapping groundwater prospectivity: A case study of the central parts of Lagos State, Nigeria","authors":"K.S. Ishola ,&nbsp;M.O. Bakare ,&nbsp;A.I. Hamid-Mosaku ,&nbsp;C.J. Okolie ,&nbsp;K.T. Olagunju ,&nbsp;O.M. Oshikoya","doi":"10.1016/j.sesci.2024.100196","DOIUrl":"10.1016/j.sesci.2024.100196","url":null,"abstract":"<div><p>Water utilization for different human activities is universally crucial, but it is not readily available for consumption in some areas, such as the central parts of Lagos State, Nigeria. Moreover, there are many groundwater controlling factors (GWCFs) spanning geological, geophysical, and hydrological factors that contribute to this scenario, coupled with uncertainties that necessitate their careful selection using appropriate modelling techniques. In this study, the Dempster–Shafer Theory of Evidential Belief Function (DST-EBF) model (a coupling approach) was deployed to produce a groundwater prospectivity zonation (GWPZ) map for the study areas. The choice of the selected locations was informed by the continued dearth of water supplies, necessitating the need to discover new locations or re-appraise the existing ones for groundwater resource development. Furthermore, remote sensing, geological, field geophysical, and hydrological datasets that constituted GWCFs were integrated into a Geographic Information System (GIS) environment. Next, the computed values for the evidence of the mass functions (i.e., belief, disbelief, uncertainty, and plausibility) were combined using the Dempster–Shafer combination rule and then interpolated using the Inverse Distance Weighted (IDW) method. Subsequently, the GWPZ map was generated and classified into five zones, ranging from very low to high prospectivity zones. The GWPZ map was validated using cross-validation to estimate statistical errors, the receiver operating characteristic (ROC) curve, and the use of inverted resistivity models from the 2D electrical resistivity imaging surveys. All the metrics used for the validation provided good account for the classified GWPZ map. The north-eastern and the south-central parts are the most promising regions for groundwater, which could be harnessed for sustainable development through borehole drilling. Thus, the integration of the DST-EBF model and GIS for effective groundwater resources and uncertainty mapping was quite successful and impressively reliable.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100196"},"PeriodicalIF":2.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000345/pdfft?md5=bac8a29e0972964710d41d0ec7494df2&pid=1-s2.0-S2451912X24000345-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142011203","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: 0
Polyphase deformation features and extensional detachment faults on the northern and southern edges of the Nigde Massif (Central Anatolia-Turkey) 尼格代地块(土耳其安纳托利亚中部)南北边缘的多相变形特征和伸展剥离断层
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2024-08-06 DOI: 10.1016/j.sesci.2024.100195
Ramazan Demircioğlu
{"title":"Polyphase deformation features and extensional detachment faults on the northern and southern edges of the Nigde Massif (Central Anatolia-Turkey)","authors":"Ramazan Demircioğlu","doi":"10.1016/j.sesci.2024.100195","DOIUrl":"10.1016/j.sesci.2024.100195","url":null,"abstract":"<div><p>The polyphase deformation features and detachment faults on the northern (Gumusler) and southern (Camardı) borders of the Nigde Massif rocks, as well as the structures developed as a result of these faults, are investigated in this paper. The Nigde Massif in the studied areas is basement Palaeozoic–Mesozoic metamorphic units. The Late Cretaceous Uckapılı granodiorite and Sineksizyayla meta-gabbro introduced the Nigde massif. These units are overlain unconformably by Late Cretaceous-Quaternary rocks. The metamorphic rocks on the massif's southern edge underwent 5-phase ductile deformation, whereas the metamorphic rocks on the northern margin underwent 3-phase folding. Both the northern and southern edges include post-Middle Eocene extensional detachment features. These are most likely extensional detachment faults related to the massif's uplift. Central Anatolia is still under an extensional tectonic regime today. Therefore, detachment fault activity and occurrence continue. A large portion of the low-angle normal faults shows an extensional detachment feature. The detachment faults identified north and south of the study area are also active today.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100195"},"PeriodicalIF":2.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000333/pdfft?md5=efaf1cbb2915e29d87274f0a30b35e70&pid=1-s2.0-S2451912X24000333-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952902","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: 0
Neoarchean subduction to back-arc extension in the North China Craton: Insights from the Dengfeng basic rock 华北克拉通从新元古代俯冲到弧后延伸:登封基性岩的启示
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2024-08-03 DOI: 10.1016/j.sesci.2024.100192
Heng Liu , Lin Sun , Lei Liu , Shuhab D. Khan , Yongjun Gao , Tianyang Hu
{"title":"Neoarchean subduction to back-arc extension in the North China Craton: Insights from the Dengfeng basic rock","authors":"Heng Liu ,&nbsp;Lin Sun ,&nbsp;Lei Liu ,&nbsp;Shuhab D. Khan ,&nbsp;Yongjun Gao ,&nbsp;Tianyang Hu","doi":"10.1016/j.sesci.2024.100192","DOIUrl":"10.1016/j.sesci.2024.100192","url":null,"abstract":"<div><p>The scarcity of the early Precambrian geological record limits our comprehension of crucial information concerning interactions between the crust and mantle, mechanisms involved in subduction zone arc-continental collisions, as well as patterns of mantle enrichment and crustal growth during this epoch. The Dengfeng terrane in the North China Craton provides significant data on Precambrian crustal evolution, particularly within the Neoarchean magmatic suites. Our study focuses on a variety of basic rocks across several locations in this region. Basic rocks from Huishansi and Sanhuangzhai (2558–2525 Ma) exhibit characteristics such as low SiO<sub>2</sub> (45.44–56.54 wt%), K<sub>2</sub>O (0.77–2.7 wt%), Na<sub>2</sub>O (1.66–4.51 wt%), and high MgO (4.66–11.22 wt%) and FeO<sub>T</sub> (8.17–13.77 wt%). Similarly, basic rocks from Shipaihe and Guojiayao (2480 Ma) also display low SiO<sub>2</sub> (46.16–52.48 wt%), K<sub>2</sub>O (0.24–1.28 wt%), and Na<sub>2</sub>O (1.87–3.75 wt%), with FeO<sub>T</sub> (1.07–2.31 wt%), but feature higher content of MgO (5.33–8.83 wt%) and Mg<sup>#</sup> (44–62, averaging 53). Both sets exhibit relatively flat REE patterns and weak negative anomalies in Nb, Ta, and Ti, corresponding to a tholeiitic basalt composition for the protoliths. Analyzing low (Hf/Sm)<sub>N</sub>, (Nb/La)<sub>N</sub>, and Th/Yb ratios, coupled with depleted HFSE, suggests potential crustal contamination in the rocks from Huishansi and Sanhuangzhai. Further, based on low V/Sc ratios (5.38–10.27, average 7.02) and depleted zircon Ɛ<sub>Hf</sub>(t) values, our proposition is that the magma was sourced through partial melting of a depleted and relatively reduced mantle source. These findings offer valuable insights into the tectonic evolution of the Dengfeng terrane, spanning from subduction to post-collisional extension.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100192"},"PeriodicalIF":2.0,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000308/pdfft?md5=3f538a94357dc691ede451eba4f9de6e&pid=1-s2.0-S2451912X24000308-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141961244","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: 0
New genetic type of lithium mineralization 锂矿化的新基因类型
IF 2 4区 地球科学
Solid Earth Sciences Pub Date : 2024-08-03 DOI: 10.1016/j.sesci.2024.100194
M.I. Tyumentseva, N.I. Akulov, A.I. Melnikov
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