Ore and Energy Resource Geology最新文献

{"title":"Spatiotemporal records of major historical events and human activities in river sediments: A coupled study of heavy metals distribution and lead isotopic dating","authors":"Shipeng Zhang ,&nbsp;Zhe Chen ,&nbsp;Sheng Wang ,&nbsp;Lan Jiang ,&nbsp;Yufei Yuan ,&nbsp;Haoren Zhao ,&nbsp;Chunyu Wang ,&nbsp;Scott S. Hughes ,&nbsp;Yi Huang","doi":"10.1016/j.oreoa.2023.100029","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100029","url":null,"abstract":"<div><p>Thirty sediment samples (11 on the surface and 19 from a 55 cm core) collected in the Dadu River, upstream of the Yangtze River, China, were analyzed by ICP-MS and Laser diffraction particle size techniques to determine heavy metal spatial-temporal distribution and particle size characteristics, respectively. The intent was to clarify the impact of human activities such as Pb-Zn mining and exploration on the distribution of potentially toxic elements (As, Cd, Cr, Cu, Pb and Zn) in adjacent fluvial deposits. Moreover, ²¹⁰Pb isotope dating was applied to study the historical variation and distribution of heavy metal pollution in a sedimentary profile in the middle section of the Dadu River. Results suggest that Cd concentration is notably high, exceeding by 16.3 times the soil background value in Sichuan Province, China, which can be intensified by Pb-Zn ore smelting. Surface sediments are mainly composed of silt, accounting for 79% on average, and relatively minor amounts of clay and sand. The fraction of clay in the downstream segments of the Dadu River is significantly higher than that upstream, indicating that the hydrodynamic force in the downstream region is relatively low compared with the upstream flow. Samples in the sedimentary profile, collected at 3 cm intervals, are mainly composed of silty sand, accounting for 75.6%, which comprehensively reflects the strong hydrodynamic force in this area. The results of ²¹⁰Pb dating of these samples indicate three intervals of historical fluctuation in heavy metal concentrations: 1950–1966, 1988–1991 and 1996–2006, respectively, which coincide to significant historical events (the Cultural Revolution, the construction of Pubugou reservoir and local smelting activities, and the implementation of environmental protection policies). Enrichment factor (EF) values of all heavy metals in the profile began to increase after 1994, and relatively high EF values of Cr and Cd indicated a significant enrichment due to increasing anthropogenic activities during this period. Our study demonstrates that anthropogenic activities can be well recorded in sedimentary profiles and provide new insights to retrieving the history of human developments.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"15 ","pages":"Article 100029"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49753230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating SBAS-InSAR and LSTM for subsidence monitoring and prediction at Hong Kong international airport","authors":"Xianlin Shi ,&nbsp;Jiahong Zhong ,&nbsp;Yong Yin ,&nbsp;Youdong Chen ,&nbsp;Hao Zhou ,&nbsp;Min Wang ,&nbsp;Keren Dai","doi":"10.1016/j.oreoa.2023.100032","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100032","url":null,"abstract":"<div><p>Hong Kong International Airport (HKIA) is one of the busiest airports in the world, and much of its land is reclaimed from the sea, making it prone to uneven subsidence of the ground. Monitoring and predicting the subsidence of its surface are crucial for ensuring the operational safety of the airport. This paper firstly obtained the surface subsidence characteristics of the HKIA through applying the Small Baseline Subset Interferometry Synthetic Aperture Radar (SBAS-InSAR) technology, and then the spatial–temporal evolution was analyzed by using the Standard Deviational Ellipse (SDE) method. Moreover, the Long Short-Term Memory (LSTM) was employed to perform surface trend prediction of HKIA. The results show that the HKIA presents different levels of subsidence and uplift, with a maximum average subsidence rate of −64 mm/year and a maximum cumulative subsidence of −199 mm. The comparison between predicted curves and the actual subsidence revealed by InSAR from 2019 to 2023 is highly consistent, with the average absolute error and root mean square error less than 5 mm, and a coefficient of determination greater than 0.99. The LSTM model utilized in this paper can achieve reliable results in subsidence prediction based on time-series InSAR, and provide alternative means for geohazard prediction.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"15 ","pages":"Article 100032"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49766068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ore genesis of the Tethyan Himalayan antimony polymetallic metallogenic belt: Constraints from isotope geochemistry","authors":"Yang Li ,&nbsp;Chenghui Wang ,&nbsp;Yubin Li ,&nbsp;Hang Liu ,&nbsp;Xudong Zhang ,&nbsp;Zong Yang ,&nbsp;Mima Puchi ,&nbsp;Gesang Lamu","doi":"10.1016/j.oreoa.2023.100030","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100030","url":null,"abstract":"<div><p>The Tethyan Himalayan metallogenic belt is a significant product resulting from the collisional orogeny between the Indian plate and the Eurasian plate. The region experienced three intricate tectonic-magmatic-mineralization stages: the 59–49 Ma Au mineralization stage, the 43–36 Ma Pb–Zn mineralization stage, and the post-collisional (25–0 Ma) Pb–Zn–Sb–Au mineralization stage. Among these, the post-collisional stage represents the most intense period of Pb–Zn–Sb–Au mineralization in the Tethyan Himalayan region. During this period, about 170 Pb, Zn, Sb, Au and Ag deposits (mineral occurrences) with different sizes and complex types were formed. An extensive analysis of isotope geochemical data from antimony polymetallic deposits within the metallogenic belt led to a comprehensive evaluation of the ore-forming fluids and mineralization processes for various deposit types in the belt. The diverse metal element enrichments and various metal deposit types in the metallogenic belt were not formed from a single fluid source. Instead, the ore-forming fluids showed characteristics of fluid mixing from multiple sources. The composition of these fluids primarily comprises formation water, magmatic water, atmospheric precipitation, geothermal water, and metamorphic fluid. However, there were similarities between the different deposit types. Ore-forming materials predominantly come from the crust, although contributions from the mantle to varying degrees have been observed. Deep magmatic fluids or metamorphic fluids within rocks play a crucial role in the ore-forming process. Simultaneously, by establishing the internal relationship between tectonic–magmatic events and Pb–Zn–Sb–Au mineralization, detailed studies on the characteristics of the ore-forming fluid and the ore-forming process were conducted.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"15 ","pages":"Article 100030"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49752967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Indian carbonatites in the global tectonic context","authors":"Malcolm Aranha ,&nbsp;Alok Porwal ,&nbsp;Ignacio González-Álvarez","doi":"10.1016/j.oreoa.2023.100023","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100023","url":null,"abstract":"<div><p>Chrono-tectonic settings of the carbonatite occurrences of India are reviewed with a focus on the “big picture” of carbonatite emplacements in the Indian plate in relation to global tectonic events associated with the amalgamation and breakup of supercontinents. Four chrono-tectonic domains, namely, Southern domain, Southeastern domain, Northeastern domain and Northwestern domain, are delineated based on the geographical distribution, tectonic settings and temporal relationships amongst the carbonatite complexes. The Southern domain comprises two sub-domains – Paleoproterozic and Neoproterozoic. The Paleoproterozoic sub-domain is related to extension due to relaxation after the Southern Granulite Terrain-Dharwar accretion, while the Neoproterozoic sub-domain is related to rifting related to the fragmentation of Rodinia. The Southeastern domain is related to the Mesoproterozoic fragmentation of Columbia. The Northeastern domain is related to the Mid-Cretaceous breakup of Greater India from Australia-Antarctica driven by the Kerguelen mantle plume that also produced the Rajmahal-Sylhet Large Igneous Province (LIP). The Northwestern domain is related to the Late-Cretaceous Indo-Seychelles-Madagascar split and the passage of Greater India over the reunion hotspot, which also produced the Deccan LIP.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"15 ","pages":"Article 100023"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49753059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Petrogenesis and tectonic implications of the early Paleozoic granites in the Lincang granitic batholith, southwestern China: Constraints from geochronology, geochemistry and Hf isotopes","authors":"Qian R. Xiao ,&nbsp;Qiang Wang ,&nbsp;Zhong Y. Liu ,&nbsp;Fu H. Xiong ,&nbsp;Lei Fan ,&nbsp;Han Zhao ,&nbsp;Ting T. Gong","doi":"10.1016/j.oreoa.2023.100022","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100022","url":null,"abstract":"<div><p>This study presents the recently discovered Wulao Shan Ordovician granite within the Lincang granitic batholith, discusses its geochemical affinity, genesis, and tectonic significance, and interprets the proto-Tethys orogenic model in southwest Yunnan. LA-ICP-MS zircon U-Pb analyses indicate a crystalline age of 473.0 ± 2.9 Ma for the Wulaoshan gneissic granite. Geochemical analyses show that the Wulaoshan granite exhibits relatively high SiO₂ concentrations (73.4–77.3 wt.%), strong peraluminous properties (ASI &gt; 1.1), strongly Eu-negative anomalies, light and heavy rare earth fractionation, and relative Ba, Nb, Ta, Sr, P, and Ti depletion. SiO₂ and P₂O₅ exhibit a strong negative correlation, whereas Rb and Y-Th with a positive correlation. The magmatic zircons have negative εHf(t) values of -5.47∼2.74. Petrographic observations and whole-rock geochemical and isotopic analyses imply no aluminum-rich minerals such as cordierite, indicating that the Wulaoshan granite is a highly fractionated, high-temperature I-type granite, which may have formed via partial melting of the magnesian-iron igneous crust. Additionally, K-feldspar, plagioclase, and biotite within the granite samples may have undergone intense fractional crystallization. The Wulao Shan gneissic granite is an arc granite associated with subduction, indicating that the Lincang Block underwent proto-Tethys subduction. This finding provides evidence for proto-Tethys subduction down to the Lincang-Simao block and further supports the bidirectional subduction model of the proto-Tethys.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"15 ","pages":"Article 100022"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49759780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental impact of artisanal and small-scale gold mining in East Cameroon, Sub-Saharan Africa: An overview","authors":"Mumbfu Ernestine Mimba ,&nbsp;Phebe Ursula Teh Mbafor ,&nbsp;Salomon César Nguemhe Fils ,&nbsp;Melvin Tamnta Nforba","doi":"10.1016/j.oreoa.2023.100031","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100031","url":null,"abstract":"<div><p>The East Region of Cameroon is a crucial area for mining activities. Over the past 20 years, there has been growing research into the potential environmental impacts of artisanal and small-scale gold mining (ASGM) in this region. Both in the short and long term, this type of mining can generate numerous health, environmental and socioeconomic impacts that can be measured using diverse methods. This study analyzes impacts of ASGM in some mining districts of this part of Cameroon through literature review. Four categories of mining-induced hazards have been considered: water and stream sediments, soil and mine tailings, health, society, and economy, and land use/cover change. The majority of studies have focused on the impacts on water and soil in the Betare-Oya and Batouri mining areas. Generally, the natural waters of Betare-Oya and Batouri are contaminated in Fe, Mn, Cu, Ni Cr and As, Cr, Pb, V, Zn, respectively. The soils in Betare-Oya are the most impacted by heavy metals due to the artisanal gold mining techniques employed. Point sources of contamination were identified to occur around active and abandoned mine sites. Additionally, socioeconomic and land use/cover risk assessments have been analyzed. The collaboration between different institutions and stakeholders can enhance the development of large databases, expertise, and technology for a better understanding of potential risks in the region and decision making. Finally, the use of GIS-based modeling for the assessment of mining-generated impacts should be expanded in the region. This approach is useful in handling geospatial data related to hazards caused by mining and for ensuring a long-term survey to monitor the evolution of contamination in natural waters, bottom sediments, and soils in the region.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"15 ","pages":"Article 100031"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49766060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geology, geochemistry, fluid inclusion microthermometry and depositional environment of the Early Cretaceous Meymeh sub-seafloor replacement sideritic-ankeritic iron deposit, Malayer-Esfahan Metallogenic Belt, Iran","authors":"Rasoul Foroutan-Nia,&nbsp;Sajjad Maghfouri,&nbsp;Ebrahim Rastad","doi":"10.1016/j.oreoa.2023.100033","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100033","url":null,"abstract":"<div><p>Meymeh sideritic-ankeritic iron deposit in the eastern part of Malayer-Esfahan Metallogenic Belt (MEMB) is formed in the sedimentary-volcanic rocks of the Early Cretaceous sequence. Ore mineralization in the study area based on stratigraphic location and type of host rocks divided in two ore horizons. Lower ore horizon located in the dolomitic-sandy limestone (Kc₃) unit, which upper ore horizon is formed in thin-bedded limestone (Km) rocks. Petrographic studies indicates that mineralization comprises three ore facies: stockwork, bedded and massive ore facies. The most important primary minerals are siderite, ankerite, ferroan-dolomite, pyrite, pyrolusite, barite and minor chalcopyrite. The most frequent textures in the ore zones include laminae, replacement, vein-veinlet, massive and banded. Dolomitization and silicification are the main wall rock alteration styles; alteration intensity increases towards the ore zones. Based on relationships between ore minerals and rock forming minerals, ore mineralization (hypogene and supergene) in the Meymeh deposit formed during three main stages: fine-grained Fe-carbonate bands are intricately interlayered with dolomite beds. Sideritic-ankeritic bands exhibit classic sedimentary textures, such as laminations and bedding, indicative of a syn-sedimentary to early diagenesis origin. Coarser-grained stage two siderites and ankerites show breccia and vein-veinlet textures, and are considered to have formed by replacement during burial diagenetic sub-seafloor fluid flow. In stage three, siderite and ankerite were converted to secondary iron oxides such as oxide/hydroxide Fe minerals during meteoric water flow through the inverted normal and thrust faults and uplift. The primary two-phase fluid inclusions in the quartz-2 and ankerite-2 minerals that have been investigated from the ore mineralization section of the Meymeh deposit are homogenized at temperatures between 110.3 to 226.9 °C. Salinities of the primary fluid inclusions range from 3.39 wt.% to 14.77 % NaCl eq. This finding suggests that hydrothermal brine fluid mixing with seawater could be the primary mechanism that prompted ore formation. The similarity of REE patterns between siderite and ankerite in different ore facies and host rock carbonates indicates their derivation from the same ore fluids. The Meymeh deposit is considered a typical case of sedimentary hydrothermal diagenetic sideritic-ankeritic mineralization, in which minerals deposited when hydrothermal fluid was released from anoxic to suboxic water columns.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"15 ","pages":"Article 100033"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49727185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Granitoid characteristics of basement to the U-mineralized Bhima basin: Implications for crustal epizone processes","authors":"Sukanta Goswami ,&nbsp;Shivam Shrivastava ,&nbsp;Chanchal Sarbajna ,&nbsp;Kusum Prakash ,&nbsp;Dheeraj Pande ,&nbsp;D.K. Choudhury","doi":"10.1016/j.oreoa.2023.100027","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100027","url":null,"abstract":"<div><p>The Dharwar Craton (DC) is an archive containing a good proportion of ancient records of crustal evolution in its rocks. The greenstone-gneiss-migmatite and granitoid complex show significant variation in terms of time, space and mechanism of emplacement according to tectonics and geodynamic set up. The plutons of the northernmost part of Eastern Dharwar Craton (EDC) are especially recognizable from typical litho-structural attributes. The intensity of regional/burial metamorphism is negligible in these granitoids with versatile nature. Simple and composite plutons are demarcated on the basis of field association with distinguishable petro-mineralogy and geochemical characters. K-metasomatism in pluton is established from petrography with supportive geochemistry. Simple pluton is syenitic in nature unlike the composite plutons with lithological variation from Tonalite-Trondhjemite-Granodiorite (TTG) to alkali feldspar granite. The granitoids are developed from crustal melting during the plate convergence. Post-orogenic nature of syenite is indicated from geochemical data. The sharp contact between the plutons and country rocks indicates significant temperature difference between country rocks and emplaced magma. The characteristic features like brittle deformation dominated structures, sharp contact between emplaced plutons and country rocks, very low grade of regional metamorphism, intensely differentiated nature and absence of diatexitic migmatite indicate a shallow crustal depth of plutonic emplacement. Higher concentration of large ion incompatible elements (e.g., U, Th, K) and associated high heat production imply shallow crustal segment with rocks derived from evolved differentiated magma. The study indicates a depth less than 8 km and temperature condition less than 250°C which correspond to epizone, where uranium remobilization is facilitated.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"15 ","pages":"Article 100027"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49727495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geochemical and mineralogical evaluation of Libale iron- rich manganese deposit, North-central Nigeria","authors":"N.G. Obaje ,&nbsp;U.A. Hassan ,&nbsp;S.O. Idakwo","doi":"10.1016/j.oreoa.2023.100024","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100024","url":null,"abstract":"<div><p>The iron-rich manganese deposits of Libale area is located within the basement complex of North-central Nigeria. Mineralogically, the major mineral phases are: goethite (Fe₂O₃.H₂O), spessartine (Mn₃²⁺Al₂(SiO₄)₃), hematite (Fe₂O₃), and quartz (SiO₂), while minor mineral phases are orthoclase (Al₂O₃.K₂O.6 SiO₂), illite (KAl₂Si₃AlO₁₀(OH)₂), and manganite (Mn₂O₃.H₂O) suggesting a trend of mineral assemblage attributed to the differential mineralization of the iron-manganese deposit that may have been caused by the geochemical tectonic activity during its formation. Geochemically, on average, the Fe₂O₃, SiO₂, Al₂O₃, CaO, P₂O₅ content are 34.59 wt.%; 26.30 wt.%; 6.94 wt%, 2.60 wt%, 2.01 wt% correspondently while K₂O and TiO₂ are less than 1wt%. Suggesting oxide facies type for the deposit. The trace element composition of V (1040 ppm), Cr (100 ppm), Co (833.33 ppm), Cu (1740 ppm), Nb (1280 ppm), W (240 ppm), Ta (320 ppm) and Zr (302 ppm) were relatively high compared to Maro, Muro and Kakun BIFs in North-central Nigeria. Bivariate plot of Fe₂O₃ Vs. Al₂O₃, suggest enrichment of Fe₂O₃ but depleted in SiO₂ and Al₂O₃, which possibly indicates replacement of precursor silica and kaolinite with goethite which are subsequently dehydrated to hematite. Al₂O₃-SiO₂-Fe₂O₃ ternary diagram indicates Precambrian Banded Iron Formation (BIF) for the Libale iron- rich manganese deposits, this was confirmed by MnO Vs. FeO. Discriminative plots: FeO. SiO₂ - (FeO + MnO) - Fe₂O₃ and Al₂O₃+ K₂O + Na₂O Vs. MnO + FeO confirmed mixed facies as the analyzed data plots between silicate facies and magnetic-silicate facies, this is linked to chemical association between Al₂O₃ and SiO₂ for the iron-rich as it confirms a transitional grade of silicate facies to magnetite-silicate facies. SiO₂ Vs. Al₂O₃ plot revealed hydrothermal and diagenetic processes for its deposition. The iron-rich manganese deposit is of low grade iron (Av. Fe=24.19%) characterized by ferruginous manganese (Av. MnO₂=23.82%) based on the generalized percentages of element of major interest in assessing quality of iron and manganese ore, therefore, good for cast iron production.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"15 ","pages":"Article 100024"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49752870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reservoir characteristics and controlling factors of Permian glutenite in Northern Zhongghai uplift, Junggar Basin, China","authors":"Shahab Aman e Room ,&nbsp;Chen Zhonghong ,&nbsp;Hassanat Ullah ,&nbsp;Waqar Ahmad ,&nbsp;Mubarik Ali","doi":"10.1016/j.oreoa.2023.100025","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100025","url":null,"abstract":"<div><p>The Permian Sandstone is well preserved in the Junggar Basin, China. It is consisting of fine to medium sandstone with interbedded shale. The present study is focused on to evaluate the reservoir characteristics and controlling factors of the Permian sandstone of Jinlong 51 well, Junggar basin, China. To fulfil the objectives of the current study, geological field, petrographic analysis, SEM, analysis, mercury injection capillary pressure, and progressed geochemical analysis has been used to evaluate the characteristics and diagenetic history of the Permian sandstone to evaluate its potential. Thin section analysis shows that rock comprises of medium to fine-grained lithic sandstone, and glutenite. Pores are primary isolated into intergranular pores, intergranular pores and intra granular pores. The SEM analysis reveals that the major diagenesis types are compaction, cementation, dissolution, and fractures. Rock is moderately compacted, with intermediate cementation as well as feldspar, rock fragment and carbonate cement dissolution. According to core NMR analysis evaluated as low porosity, low permeability of the reservoirs, some of them are low porosity and low permeability reservoirs. The mercury injection capillary pressure shows that pore throat is intermediate pores with moderate pore throat. Permian sandstone consisting of average porosity 17.8% and permeability is from 5.2 to 8 mD, which recommended that the studied formation consisting of moderate reservoir characteristics. Compaction, cementation and fractures fills with clastic material decreases, whereas primary intergranular pores, dissolution pores and fractures increases the reservoir quality. Finally, the impact of diagenesis on the physical properties of the reservoirs under study has been investigated, the compactions and cementation along with other constrains effect the porosity as well as permeability of the glutenite reservoirs.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"15 ","pages":"Article 100025"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49753294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}