Ore and Energy Resource Geology最新文献

{"title":"Relationship between the genesis of Changlinggang alkaline rocks and uranium mineralization in the 414U-Th deposit, Jianshui County, Yunnan Province, China","authors":"Suheng Zhang ,&nbsp;Zhengqi Xu ,&nbsp;Yingjun Liu ,&nbsp;Minghui Yin ,&nbsp;Wenbo Zhu ,&nbsp;Shiwen Guo ,&nbsp;Xiaokun Huang ,&nbsp;Lei Kan ,&nbsp;Guangbin Wu ,&nbsp;Yi Luo ,&nbsp;Tiansong Jiang","doi":"10.1016/j.oreoa.2024.100046","DOIUrl":"https://doi.org/10.1016/j.oreoa.2024.100046","url":null,"abstract":"<div><p>Alkaline rocks identified in the 414 U-Th deposit in Jianshui County, Yunnan Province, exhibit intense spatial correlation with uranium mineralization. However, limited investigations into their genesis have had an adverse impact on our understanding of uranium mineralization. Analyses of major and trace elements, U-Pb chronology, and petrography were conducted on alkaline rocks. The results indicate that anorthosite, which is rich in alkalis, high in potassium, peraluminous, enriched in rare earth elements (U, Th, Rb, and Zr) and deficient in Sr, Ba, Ti, and P, predominates the lithology. The light and heavy rare earth fractionation of the material is readily apparent (LREE/HREE=7.89–46.72), and the presence of Eu negative anomalies (δEu=0.65–0.81) suggests that the region from which the magma originated is a metasomatism-enriched mantle where the source material originates from the transition zone between garnet-lherzolite and spinel-lherzolite in the EMII-enriched lithospheric mantle. This area underwent metasomatization by subduction material from the Paleo-Pacific Ocean and during the ascent process, magma experienced a certain degree of partial melting and a significant degree of crystallization differentiation. The diagenesis of the syenite (186.64 ± 3.76 Ma) occurred after the closure time of the Paleotethys Ocean (237 Ma) in a dynamical context of an intra-terrestrial rift environment following subduction of the oceanic plate. In summary, the U and Th present in the 414 U-Th deposits underwent isomorphism within biotite and feldspars during the hydrothermal mineralization stage of magma evolution, where they were enriched in minerals through the separation and crystallization of alkaline magma.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"16 ","pages":"Article 100046"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666261224000087/pdfft?md5=b4dad56ac8ab05a10316112770d4cc4a&pid=1-s2.0-S2666261224000087-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140191861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of the major- and trace-element compositions of the Kang-dian and Rössing-Husaib uraniferous leucocratic rocks","authors":"Chuanrong Nie ,&nbsp;Lu Xiang ,&nbsp;Zhengqi Xu ,&nbsp;Chongxiao Dai","doi":"10.1016/j.oreoa.2023.100038","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100038","url":null,"abstract":"<div><p><span>The Rössing-Husaib area is well-known for its low-grade and large-reserve U deposits hosted by leucogranites. The leucocratic dykes in the Kang-dian area of China resemble the Rössing-Husaib uraniferous leucogranites in occurrences and mineral assemblages, however, it remains disputable if the Rössing-Husaib and Kang-dian leucocratic rocks have consistent U-mineralizing processes. A comparison of the major and trace element data of the leucocratic rocks from both areas may help to better understand the ore-forming mechanisms and provide implications for exploration in the Kang-dian area. The positive correlation between Rb and P</span>₂O₅ contents for the Rössing leucogranite samples is typical of S-type granitoids in spite of the low A/CNK ratios (∼1.0). The Rössing-Husaib uraniferous leucogranites are generally rich in K₂O and Rb, and have high Rb/Sr and Rb/Ba ratios. In contrast, the Kang-dian leucocratic dykes have lower K₂O and Rb contents, and lower Rb/Sr and Rb/Ba ratios, suggesting a clay-poor source. The U contents of the Rössing-Husaib and Kang-dian dyke samples are positively correlated with TiO₂<span><span><span> contents, but show no correlation with Rb/Sr ratios, which is inconsistent with fractional crystallization. Low-degree partial melting of a U-rich </span>protolith may account for primary U enrichment in the leucocratic rocks. The variable major- and trace-element compositions of the Kang-dian dyke samples may reflect wall-rock assimilation and/or alteration to varying degrees, which further enhanced U enrichment. Relatively low Th/U ratios (∼0.1) favored the final crystallization of </span>uraninite<span><span>. The uraniferous leucogranites in the Kang-dian and Rössing-Husaib areas are commonly undeformed and emplaced along regional large faults and/or domes at the late stage of orogeny. We propose that decompression and uplift of basement rocks facilitated the generation of uraniferous melts, and regional large faults provided a pathway for the ascent of leucocratic </span>magma from depth.</span></span></p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"16 ","pages":"Article 100038"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139433672","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":"Constraints on uranium mineralization by chronology and microgeochemical characteristics of monazite in the Datian area of the Kangdian region, China","authors":"Zhengqi Xu ,&nbsp;Minghui Yin ,&nbsp;Wenbo Zhu ,&nbsp;Long Cheng ,&nbsp;Chengjiang Zhang","doi":"10.1016/j.oreoa.2024.100043","DOIUrl":"https://doi.org/10.1016/j.oreoa.2024.100043","url":null,"abstract":"<div><p>Monazite, a common U-containing ore-rich mineral found in association with U minerals, has excellent sealing properties after its formation, making it a promising tool for determining the age and genetic type of U mineralization. The Datian area in the Kangdian region of China is an important Neoproterozoic U ore-forming region. It has garnered the attention of researchers owing to the presence of megacrystalline uraninite with well-developed crystal forms. However, most studies conducted on U mineralization in the Datian area have focused on macroscopic observations and uraninite, with limited reports on accessory minerals. In this study, LA-ICP-MS U-Pb chronology and in-situ major and trace element analyses were performed on monazite associated with megacrystalline uraninite in the Datian area metallogenic belt I. The research yielded the following insights: 1) U mineralization in the Datian area was estimated to have occurred approximately 770 million years ago. This age demonstrates a potential correlation with the assembly and fracturing of the Rodinia supercontinent, suggesting a geodynamic context for the mineralization event. 2) The geochemical characteristics of the monazite indicate an igneous rock origin for its genetic type. Combined with previous research findings, it is postulated that U mineralization in the Datian area may be closely linked to the partial melting of deep crustal materials within a metamorphic environment characterized by high temperature and low pressure.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"16 ","pages":"Article 100043"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140016075","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":"Vanadium rich Fe-Ti oxide and Cu-sulphide mineralization in Paleoproterozoic Mangikhuta volcanics, Central Indian Craton: metallogenic and petrogenetic implications","authors":"Sunil Kumar Khare ,&nbsp;Anil D Shukla ,&nbsp;Akella S Venkatesh","doi":"10.1016/j.oreoa.2024.100041","DOIUrl":"10.1016/j.oreoa.2024.100041","url":null,"abstract":"<div><p>This study reports for the first time, Fe-Ti-V oxide and Cu-sulphide mineralization in Paleoproterozoic Mangikhuta basalt Formation, central Indian craton. Electron microprobe and laser ablation analyses of Fe-oxides reveal high FeO (45–69 wt %), TiO₂ (19–53 wt %), V (1860 - 4990 ppm), Zr (394–3130 ppm), Nb (55–285 ppm) and Zn (324–668 ppm). Interelemental relationships of Fe-oxides reveal their magmatic origin. High concentration of lithophile elements in Fe-oxides besides V and Ni trends in incompatible element plots indicate their origin from mafic melt. High Cu content (269 and 314 ppm) in the host basalt samples along with chalcopyrite mineralization observed during ore petrography indicates sulphide saturation of Mangikhuta magma. The chondrite normalized rare earth element (REE) plots of the host rock samples are overall similar to the earlier reported Mangikhuta REE patterns, which indicates genetic relation of Fe-oxides and Cu-sulphides with Mangikhuta volcanism. Fe-oxide and Cu-sulphide mineralization in Mangikhuta basalt is related to hydrous and oxygen rich arc related mafic melt intrusion into the Khairagarh back arc basin. Sulphide saturation in Mangikhuta basalt was initiated due to precipitation of Fe-oxides from the evolved melt whereas addition of fresh batch of hydrous and oxygen rich melt derived from the arc-related mantle source increased oxygen fugacity of residual melt that resulted in alternate phases of high oxygen and Sulphur fugacity and precipitation of Fe-oxide and Cu-sulphides from the melt.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"16 ","pages":"Article 100041"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139832771","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":"Picking of weak signal in seismic exploration of non-coal solid mines based on phase-locked technology","authors":"Lian Jiang ,&nbsp;Quanfeng Wang ,&nbsp;Congyu Wang ,&nbsp;Huan Cao ,&nbsp;Yongfa Wang ,&nbsp;Jingxin Wu ,&nbsp;Bin Xu","doi":"10.1016/j.oreoa.2024.100042","DOIUrl":"https://doi.org/10.1016/j.oreoa.2024.100042","url":null,"abstract":"<div><p>The exploration and development of mineral resources are of crucial significance to national economy, people's livelihood and national security. Therefore, in order to extract the weak signal in seismic exploration of non-coal solid mines in shallow surface layer to achieve high-resolution exploration, the mathematical model and physical model of multiplier are established by referring to the frequency point acquisition technology in wireless radar communication, that is, phase-locked technology. The weak effective seismic signals of different frequency points are picked out from the collected 120 dB dynamic range spectrum, and the information of stratigraphic structure under high noise background is obtained more effectively by using mixing detection and two-phase demodulation technology in the harmonic component spectrum, thereby improving the high resolution and high precision of mineral exploration. The lock-in amplifier is added to the front stage of the seismograph to obtain the effective seismic wave reflected by the wave impedance interface required in the exploration task. Experimental results show that this method significantly improves the SNR and protects the weak effective signal from loss. It adds new technology and method to seismic signal acquisition and processing, and provides a new way to obtain high-quality seismic data in the field of mineral geophysical exploration, and will be widely used after being promoted in the fields of mineral exploration, geological disaster prediction, military geophysics, and archaeology.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"16 ","pages":"Article 100042"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140138741","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":"Graphite does not function as a direct reducing agent for unconformity-related uranium mineralization – Evidence from the graphitic metapelite-hosted Gryphon uranium deposit, northern Saskatchewan, Canada","authors":"Nahanni Young ,&nbsp;Guoxiang Chi ,&nbsp;Yongxing Liu ,&nbsp;Hao Song","doi":"10.1016/j.oreoa.2023.100028","DOIUrl":"https://doi.org/10.1016/j.oreoa.2023.100028","url":null,"abstract":"<div><p>It is generally agreed that the unconformity-related uranium (URU) deposits in the Athabasca Basin (Canada) resulted from reactions between basin-derived, oxidizing, U⁶⁺-bearing fluids and reducing agents carried by basement-derived fluids or lithologies enriched in reducing elements. Based on the observation that most URU deposits are spatially associated with graphite-rich zones in the basement, it is believed that either the graphite itself or hydrocarbons derived from it acted as major reducing agents for U mineralization. Several previous studies downplayed graphite as a direct reducing agent for U mineralization because few or no direct contacts between uraninite and graphite have been observed. However, it remains skeptical whether or not this is due to insufficient observation, and what happened to the graphite if it was not directly involved in U precipitation. In this study, graphitic metapelite samples were collected from the Gryphon URU deposit for detailed petrographic and Raman spectroscopic study. Two types of graphite were identified, an earlier phase (Gr1) that is parallel and deformed together with the schistosity, and a later phase (Gr2) that is post-deformation, both of which are pre-U mineralization. Thorough microscopic examination confirmed that there is no direct contact between uraninite and graphite in the thin sections. Raman spectroscopic studies of the graphite indicate that the structural order of both Gr1 and Gr2 decreases toward the orebody. These observations indicate that graphite was not a direct reducing agent causing the precipitation of uraninite. Hydrocarbons (mainly CH₄) produced from in situ fluid-graphite reaction was not responsible for the uraninite precipitation either, because such a process would also have produced textures showing replacement of graphite by uraninite. Instead, the graphite initially present in the host rocks that are now occupied by the orebodies was likely dissolved by the hydrothermal fluids ahead of the precipitation of uraninite. The actual reducing agents causing the precipitation of the bulk of uraninite in the orebodies are likely CH₄ derived from ex situ fluid-graphite reaction below the deposit.</p></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"15 ","pages":"Article 100028"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49753247","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":"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}