Solid Earth Sciences最新文献

{"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}

{"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 SiO₂ (45.44–56.54 wt%), K₂O (0.77–2.7 wt%), Na₂O (1.66–4.51 wt%), and high MgO (4.66–11.22 wt%) and FeO_T (8.17–13.77 wt%). Similarly, basic rocks from Shipaihe and Guojiayao (2480 Ma) also display low SiO₂ (46.16–52.48 wt%), K₂O (0.24–1.28 wt%), and Na₂O (1.87–3.75 wt%), with FeO_T (1.07–2.31 wt%), but feature higher content of MgO (5.33–8.83 wt%) and Mg^# (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)_N, (Nb/La)_N, 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_Hf(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}

{"title":"New genetic type of lithium mineralization","authors":"M.I. Tyumentseva,&nbsp;N.I. Akulov,&nbsp;A.I. Melnikov","doi":"10.1016/j.sesci.2024.100194","DOIUrl":"10.1016/j.sesci.2024.100194","url":null,"abstract":"<div><p>In the southern part of the Siberian platform, a new genetic type of lithium mineralization was discovered in the Lower Cambrian halogen-carbonate formation of the Angara-Lena marginal trough, which arose as a result of the introduction of a fluid-saturated solution into the sedimentary cover of the platform. Focal hydrothermal development of halogen-carbonate deposits along deep faults led to the formation of lithium-bearing mineralization. A gradual reduction in tectonic activity within the Angara-Lena marginal trough was accompanied by the subsidence of hydrothermal-sedimentary deposits. In this case, the precipitated substance was dispersed and later transformed into layers. It has been established that the main lithium minerals are hectorite and lithiophorite. The results of a study of lithological and geochemical associations of rare earth elements in sections of Early Cambrian deposits of the studied lithium mineralization are presented.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100194"},"PeriodicalIF":2.0,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000321/pdfft?md5=2312c7c3dbc321928ef89a3aa8f79733&pid=1-s2.0-S2451912X24000321-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141961246","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}

{"title":"Litho-stratigraphic characterization of hydrogeological and hydraulic flow units via electrical resistivity, Stratigraphic Modified Lorenz Plots, and flow zone indicator models","authors":"Ndifreke I. Udosen,&nbsp;Aniekan M. Ekanem,&nbsp;Nyakno J. George","doi":"10.1016/j.sesci.2024.100191","DOIUrl":"10.1016/j.sesci.2024.100191","url":null,"abstract":"<div><p>Litho-stratigraphic characterization within hydrogeological units of a major aquifer system in Southern Nigeria was carried out using Electrical Resistivity (ER), Stratigraphic Modified Lorenz Plots (SMLP), and Flow Zone Indicator (FZI) algorithms. The aim of integrating these technologies was to generate hydraulic flow units (HFU) that would describe the speed of flow and efficiency within the aquifer's stratigraphic units. Electrical Resistivity technology delineated four geoelectric layers within the study area: motley topsoil, coarse sand, fine sand, and sandy clay, with the aquiferous formation being the third layer. Via measures obtained from geo-electrical data, major geo-hydraulic parameters were estimated. The hydraulic conductivity ranged from 3.1 x 10⁻⁵ to 9.3 x 10⁻⁵ m/s, effective porosity ranged from 0.33 to 0.54, permeability ranged from 4362.9 to 13143.4 mD, tortuosity ranged from 0.85 to 0.97, Aquifer Quality Index (AQI) values ranged from 3.57 to 4.88 and Flow Zone Indicator values ranged from 4.11 to 7.00. The Stratigraphic Modified Lorenz Plots delineated the presence of three hydraulic flow units within the region. The first hydraulic flow zone was a superconductor with good efficiency ranking; the second and third flow zones were conductors having fair efficiency rankings. Results obtained from measures of Aquifer Quality Index (AQI) were employed to generate Discrete Rock Typing (DRT) results which indicated the presence of two distinct aquifer rock matrix types. The Dykstra-Parson co-efficient, employed in evaluation of aquifer heterogeneity, gave a value of unity, indicating perfect heterogeneity of the aquifer.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100191"},"PeriodicalIF":2.0,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000291/pdfft?md5=621369772622818cf06dcdf75eab1158&pid=1-s2.0-S2451912X24000291-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141961245","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}

{"title":"Stratigraphic correlation and provenance study of exposed Eocene - Oligocene sedimentary sequences in southern Nigeria using high-resolution heavy minerals and garnet geochemical analyses","authors":"Azuka Ocheli ,&nbsp;Ovie Benjamin Ogbe ,&nbsp;Ejiro Newton Omoko ,&nbsp;Godwin Okumagbe Aigbadon","doi":"10.1016/j.sesci.2024.100189","DOIUrl":"10.1016/j.sesci.2024.100189","url":null,"abstract":"&lt;div&gt;&lt;p&gt;Provenance and stratigraphic correlations across the exposed Eocene-Miocene sedimentary sequences of southern Nigeria that exhibit similar lithologies and are biostratigraphically-barren have been carried out. Heavy mineral assemblages in the 63–250 μm sand fractions of 43 sediment samples across the sedimentary sequences were assessed via wet-sieving, centrifugation, and polarizing petrologic microscopic analyses. Opaque, apatite, garnet, kyanite, zircon, rutile, staurolite, tourmaline, and epidote heavy mineral species were identified and point-counted. Electron microprobe analysis was carried out on the garnet-heavy mineral species using a CAMEBAX Cameca electron microprobe with a link four-wavelength energy-dispersive mode spectrometer analyser. This study revealed the existence of three heavy mineral associations and three lithostratigraphic formations. Heavy mineral association A is characterized by assemblages of kyanite, zircon, and rutile grains. The occurrence of kyanite in this association indicates derivation from schist and gneissic rocks. Zircon grains indicate sialic to intermediate igneous rocks derivatives that has sustained several periods of recycling, and redeposition. The occurrence of rutile indicates metamafic and metapelitic rocks with other sources being minor. Heavy mineral association B is characterized by assemblages of staurolite, opaque materials, garnet, and epidote. The presence of opaque grains indicates a shorter distance of transport possibly from proximity. The occurrence of staurolite grains indicates metamorphic and magmatic rock derivatives from schists, slates, and gneisses. Garnets are predominantly derived from high-grade metamorphic rock (granulite-facies) metasediments and charnockites and lower grade (amphibolite-facies) metasedimentary rocks and granitoids. An epidote is a metamorphosed igneous rock derived from the adjoining radix. Heavy mineral association C is characterized by assemblages of tourmaline and apatite. Tourmaline grains indicate pneumatolytic rocks, pegmatite, schist, gneisses, and marble source rocks. Apatite indicates derivation from local outcrops exposed during the Benue Trough uplift. The occurrence of apatite and its assemblages with tourmaline indicate felsic igneous rocks with ultramafic compositions, metamorphic rocks with low to high grades and derivatives of diverse protolith compositions. The exposed Eocene-Miocene sedimentary deposits that exhibit similar lithologies and biodata are relatively lacking. They were differentiated into three different lithostratigraphic formations and correlated. These analyses were performed using heavy mineral characterization, optical property, garnet geochemical composition, and inference supported by multivariate statistical analyses. Variations in the numerical values of unstable heavy minerals reveal dissolution and overgrowth through acidic groundwater, changes in climatic conditions, and relative eustatic sea-level changes. Th","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100189"},"PeriodicalIF":2.0,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000278/pdfft?md5=c16d090ee5ddecd92c488b52381e364f&pid=1-s2.0-S2451912X24000278-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141728752","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}

{"title":"Evolution of Earth's habitability regulated by deep earth processes","authors":"Yi-Gang Xu","doi":"10.1016/j.sesci.2024.100190","DOIUrl":"https://doi.org/10.1016/j.sesci.2024.100190","url":null,"abstract":"","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100190"},"PeriodicalIF":2.0,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X2400028X/pdfft?md5=cda7517f5452c7752a91e34f0ca72871&pid=1-s2.0-S2451912X2400028X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141607759","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}

{"title":"Origin of continental red beds: Warming from above or heating from below?","authors":"Lianting Jiang ,&nbsp;Chun'an Tang ,&nbsp;Bin Gong ,&nbsp;Zhen Chen ,&nbsp;Tiantian Chen ,&nbsp;Zhanjie Qin ,&nbsp;Guoneng Chen","doi":"10.1016/j.sesci.2024.100187","DOIUrl":"https://doi.org/10.1016/j.sesci.2024.100187","url":null,"abstract":"<div><p>The formation of continental red beds is generally considered to be related to an arid climate. Heating experiments (performed by L.J. and G.C.) using dried black mud sediment also demonstrate that the reddening may be caused by the transformation of goethite to haematite that begins at approximately 150 °C under anhydrous conditions, and increasing the temperature to 450 °C is positively correlated with the red colour and peak value of haematite. If this process applies to continental red beds, it implies a thermal origin of red beds as a result of high diagenetic temperatures rather than as the cause of their deposition under an arid climate. Namely, subsiding red-bed basins are heated from below rather than warmed from above. Here, we further strengthen this idea by new evidence from borehole cores drilled from red beds in SE China, showing a clear geological section from the surface soil to red beds to bottom granite. The data reveal that the continental red beds formed at least at a temperature within 150–400 °C, and the underlying granite usually formed at temperatures greater than 600 °C. Our results imply a possible relationship between continental red bed events and Earth's thermal cycles.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100187"},"PeriodicalIF":2.0,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000254/pdfft?md5=f90c136f9832d41f2f2e6d84960ec8a4&pid=1-s2.0-S2451912X24000254-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141291374","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}

{"title":"Geochemical constrains for unravelling the condition of sedimentation, provenance, paleoclimate variation, and metallogenic implication of the cretaceous deposits of Mayo Oulo Basin (North Cameroon, Africa)","authors":"J. Ngo Elogan Ntem ,&nbsp;V. Ngounfack Tiokeng ,&nbsp;R. Toyama ,&nbsp;Y. Berinyuy Konglim ,&nbsp;J.F. Takou ,&nbsp;N. Togoum ,&nbsp;T. Ngnotue ,&nbsp;M.S. Tchouatcha","doi":"10.1016/j.sesci.2024.100188","DOIUrl":"https://doi.org/10.1016/j.sesci.2024.100188","url":null,"abstract":"<div><p>The sediments from the Mayo Oulo intracontinental Basin, along the N–S cross section between the Gadavou and Lombel localities in central part of the basin, were investigated through major and trace elements geochemistry associated with palynological analysis to determine their condition of sedimentation, paleoclimate evolution and metallogenic implication along the Cretaceous sequence from the N–S cross section of the central part of this basin. From bottom to top of this sequence there are various types of facies with various concentrations of carbonate. Based on their major oxides compositions, the sediments were classified as Shales associated with Fe-shales, Fe-sands, Wacke and Litharenite. The CIX (Chemical Index of Alteration, 62.65 to 98.14) and PIX (Plagioclase Index of Alteration, 65.00 to 99.13) sediments underwent a various chemical weathering; little chemical weathering in the middle to the upper part of the sequence and moderate to high chemical weathering in the lower part. The discriminant function-based multidimensional tectonic diagrams indicate mainly and respectively arc-collisional and Island arc-active continental margin settings which are consistent with the Precambrian geological history of the study area. The SiO₂ vs. Al₂O₃+K₂O + Na₂O, C-values, associated with trace elements plots such as Sr/Ba, and Rb/Sr, and palynological content (continental or terrestrial species exclusively, dominated by Gymnosperm pollens such as. <em>Inaperturopollenites</em> sp., <em>Araucariacites</em> sp. and <em>Classopollis</em> sp, associated with spores such as <em>Cicatricosisporites</em> sp) indicate mainly arid to semi-arid climate with periodic humid to semi-humid conditions. The Sr/Ba values ranging from 0.084 to 6.408 suggest a fluctuating and sometimes high salinity (Hypersaline milieu). The rare earth elements data show high LREE/HREE ratios (2.86–13.31); high negative and positive Eu anomaly (Eu/Eu∗ = 0.33 to 1.38) and no Ce anomaly (Ce/Ce∗ = 0.94 to 1.02); these features, together with mixed major and trace element ratios and plots such as, Al₂O₃/TiO₂ ratios (14.31–54.26); Th/Co ratios (0.30–14.58); Ce vs La/Yb, Zr vs TiO₂ and La/Sc vs Th/Co plots, indicate that the sediments are derived mainly from felsic to intermediate or mafic rock composition. Ni/Co (1.86–3.59) and U/Th (0.03–0.76) ratios are consistent with oxic conditions from bottom to top of the sequence. The Al/Si ratio shows positive correlation with CIA, Th, Zr, Hf, Na, K and negative correlation with Ca and Mg. The positive correlation with K, Hf, Na, Zr, and Th from detrital origin and negative correlation with Ca and Mg from chemical origin could suggest the geochemical composition control of grain size. According to the ternary Al–Fe–Mn diagram metallogenic classification, the studied samples are essentially terrigenous and partially weakly metalliferous, clos","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 3","pages":"Article 100188"},"PeriodicalIF":2.0,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000266/pdfft?md5=4e94c9fdd07d3dbb9c8f3ebf0bd6c084&pid=1-s2.0-S2451912X24000266-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141291385","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}

{"title":"Geochronology and geochemistry of garnet from Tongguanshan skarn Cu deposit, Tongling, eastern China: insights into ore-forming process","authors":"Shan Huang,&nbsp;Jiancheng Xie,&nbsp;Quanzhong Li,&nbsp;Likai Ge,&nbsp;Liu Yang,&nbsp;Jun Yan","doi":"10.1016/j.sesci.2024.100167","DOIUrl":"https://doi.org/10.1016/j.sesci.2024.100167","url":null,"abstract":"<div><p>Skarn Cu deposits are one of most important deposit-type in Middle-Lower Yangtze River region, eastern China, but skarn formation process remains unclear. Mineralogical, morphological and in situ geochemical data from the skarn stage of Tongguanshan skarn Cu deposit in Tongling region are systemically investigated, to reveal the timing, physical-chemical conditions, and fluid evolution during the skarn formation. The Tongguanshan garnets can be identified homogeneous and unzoned early generation garnet (GrtI), and oscillating zoned late generation garnet (GrtII) with the Fe-rich core (GrtII-Fe) and Al-rich edge (GrtII-Al). Garnet U–Pb dating results show that the Tongguanshan Cu mineralization was formed in 145.6 ± 4.4 Ma. In situ elemental composition results of the garnet samples indicate that they belong to grossular-andradite solid solution series, and are a magmatic-hydrothermal origin. The distinctly geochemical characteristics (e.g., Sn and U contents, (La/Yb)_N, δEu and Y/Ho values) reveal that the physiochemical conditions from GrtI to GrtII-Fe, and GrtII-Fe to GrtII-Al stages in the Tongguanshan skarn formation were an increase and a decrease of fluid salinity and oxygen fugacity, closed to open and then to closed of fluid environment, and neutral-weakly acidic to acidic and acidic to neutral-weakly acidic of fluid pH, respectively. A comprehensive discriminant analysis indicates a fluid boiling occurred in the GrtI to GrtII-Fe stage of the Tongguanshan skarn Cu deposit, and there is little or no external fluid mixed during the skarn stage.</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 2","pages":"Article 100167"},"PeriodicalIF":2.0,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000059/pdfft?md5=7a210b3f973ca909ba35c89b02ef9ee2&pid=1-s2.0-S2451912X24000059-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141066969","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}

{"title":"Genesis of the Panzijian gold deposit in Jiaodong Peninsula, Eastern China: Insights from fluid inclusion and isotopes","authors":"Mingzhen Li ,&nbsp;Guangzhou Mao ,&nbsp;Zhengjiang Ding ,&nbsp;Qinglin Xu ,&nbsp;Huiji Zhao ,&nbsp;Yanchao Han ,&nbsp;Tieliang He","doi":"10.1016/j.sesci.2024.100177","DOIUrl":"https://doi.org/10.1016/j.sesci.2024.100177","url":null,"abstract":"<div><p>The Panzijian gold deposit is located in the Jiaobei uplift on the eastern margin of North China Craton. It is a quartz vein-type gold deposit in the southern end of the Qixia-Penglai ore belt. In order to explore the source and properties of ore-forming fluids and materials in the Panzijian gold deposit, explore the ore-forming process and reveal the genesis of the deposit, this work has carried out petrographic observation and temperature measurement of gold-bearing quartz fluid inclusions, laser Raman experiment, gold-bearing quartz H–O isotope study, and gold-bearing pyrite Pb isotope study. The Panjian gold deposit is divided into four metallogenic stages and the metallogenic stage Ⅲ is the main gold mineralization stage. Fluid inclusions show that the ore-forming fluids at the Panzijian gold deposit belong to a CO₂–H₂O–NaCl system with low temperature (172–341 °C), salinity (1.57–10.49 wt% NaCl), and density (0.79–0.96 g/cm³). Gold-bearing Quartz H–O isotopic data (δD = −79.8 to −65.1‰, δ¹⁸O_H2O = 1.33–2.63‰) show that the ore-forming fluid was derived from the mixing of magmatic water and meteoric water. Gold-bearing Pyrite Pb isotopes with crustal signature (²⁰⁶Pb/²⁰⁴Pb = 16.06–16.943, ²⁰⁷Pb/²⁰⁴Pb = 15.337–15.858, ²⁰⁸Pb/²⁰⁴Pb = 37.143–38.081, and ²⁰⁶Pb/²⁰⁷Pb = 1.025–1.105) support that some ore-forming materials were crust-derived. We proposed a metallogenic model for the Panzijian gold deposit: Stress transition of Jiaobei uplift tectonic system inducing asthenospheric upwelling. The lithostatic pressure dropped and fluids were exsolved from the magma. The ore-forming fluid ascended along local faults and the pressure further dropped, resulting in fluid immiscibility and gold deposition along structural traps (e.g., faults).</p></div>","PeriodicalId":54172,"journal":{"name":"Solid Earth Sciences","volume":"9 2","pages":"Article 100177"},"PeriodicalIF":2.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451912X24000151/pdfft?md5=c175166c0eeb37109f0aa62948b6efa3&pid=1-s2.0-S2451912X24000151-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140947573","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}