Lead zinc copper mineralization in the lower Benue Trough of Nigeria occurs as discordant fracture controlled veins within the Lower Cretaceous shales of the Asu River Group. Three stages of events are proposed for the evolution of the veins in this district: 1.
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Sediment-hosted Pb-Zn deposits can be divided into two major subtypes. The first subtype is clastic-dominated lead-zinc (CD Pb-Zn) ores, which are hosted in shale, sandstone, siltstone, or mixed clastic rocks, or occur as carbonate …
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Contrast: Stratiform lead-zinc deposits, similar to SEDEX deposits, are bedded deposits in sedimentary rocks. CRDs, while also occurring in carbonate sequences, may involve more complex hydrothermal replacement processes. Commonality: Both deposit types can be stratiform and contain lead and zinc mineralization, but the geological processes ...
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Organic Mineralization of Lead-Zinc Deposits in Devonian System, Xicheng Ore Field. Earth Science, 28(2): 201-208. Citation: ZHU Di-cheng, ZHU Li-dong, LIN Li, XIONG Yong-zhu, PANG Yan-chun, FU Xiu-gen, 2003. Organic Mineralization of Lead-Zinc Deposits in Devonian System, Xicheng Ore Field.
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From Fig. 7 A and 7B, it can be seen that the model predicts a probability of 97 % and 100 % for lead–zinc deposits, respectively. Therefore, in the context of predicting lead–zinc mineralization in the Changba mining area, the levels of Pb, Zn, Cd, Ba, Hg, and Sb elements play a significant positive role in the model's prediction success.
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However, subsequent studies found that the origin of lead in the trough was more hydrothermal than magmatic (Offodile 1980;Olade and Morton 1985;Mücke 1989, 1993;Maurin and Benkhelil 1990;Oha et ...
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Sediment-hosted Pb-Zn (±Ba ± Cu ± F ± Ag) deposits contain the major global resources of lead and zinc and contribute significantly to the world's production of Pb-Zn (Singer, 1995, Wilkinson, 2014).These deposits account for around 52 % of lead global resources and 48 % of zinc, thus are economically important source of base metals on Earth (Singer, 1995, …
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They found out that the mineralization of lead-zinc ore were deposited by saline, low temperature ore fluids ranging from 100 to 176°C with a density greater than 1.0 g/cc3. Thus, the most probable mode of origin is leaching of metals from sediments by heated connate waters during initial rifting and igneous activity in Albian ...
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Lead-zinc-barytes mineralization in the Trough is believed to be hydrothermal in origin and is associated with brine springs. Fracturing and jointing are intense in the areas of mineralization. Lead-zinc minerals in the form of their ores of galena and sphalerite respectively and barytes mineralization are often
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The role of hydrocarbon fluids in metal mineralization is a key topic in lead-zinc ore formation studies. Hydrocarbon fluids may contribute to the remobilization, enrichment, migration, and precipitation of metals (Anderson, 2008, 2015; Hurtig et al., 2018).Crude oil and its derivatives can directly provide reducing sulfur or agents for thermochemical sulfate reduction (TSR), …
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Lead Zinc Mineralization in Karempudi Area, Guntur District 147 conformable sequence. The Sreesailam quartzites and Irlakonda quartzites are separated by a series of slates called Kolumnalas. The Cumbums are not separated from the overlying Krishnas by any definite unconformity. Existence of such a break in sedimentation can be
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Fluid-inclusion studies of regionally extensive epigenetic dolomites, Bonneterre Dolomite (Cambrian), southeast Missouri: Evidence of multiple fluids during dolomitization and lead-zinc mineralization: Alternative interpretation and reply
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Lead; Zinc, Mineral; Resistivity; Tomography; Induced polarisation; Wase. 1. Introduction. Globally, over 50 per cent of lead-zinc mineralisation and occurrences are hosted by sedimentary deposits in veins and veinlets created by effects such as shale tectonism (Tikkanen, 1986; Adejuwon et al., 2021), steeply dipping cracks, and sheeted zones in sediments intruded by …
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The occurrence of apparent syngenetic zinc mineralization in cauldron-hosted sedimentary rocks represents a rare style of mineralization for intermediate-composition, continental volcanic centers. The occurrence of stratiform wurtzite and sphalerite makes San Cristobal a world-class zinc resource, as well as a world-class silver resource, and ...
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Mineralization. Pulacayo Tajo vein is high-grade, silver-lead-zinc epithermal vein system Tajo Vein is between 5 to 20 meters with mineralized halos of up to 50 meters wide High grade shoots can exceed 10,000g/t silver and 50% combined lead and zin Tajo vein starts from surface with a known strike of over 2.5 km and extends to 1km at depth ...
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Abakaliki lead-zinc mineralization is believed to be of hydrothermal origin emplaced at a low temperature of about 1400 and it is made up of primarily four lodes namely Ishiagu, Enyigba, Ameri, Ameka in the lower Benue Trough (Kaliberng, 2011).
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A detailed geophysical survey was carried out at Babbantsauni and Ledi.A regional geological reconnaissance investigation was carried out by McConnell (1949) and identified that Izom Lead/Zinc is the only known considerate Lead/Zinc deposit in Nigeria outside the area covered by cretaceous rocks. The lodes appear to trend in the same direction.
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Some geophysical investigations of brines and associated lead-zinc-barite (Pb-Zn-Ba) mineralization in the BT used electromagnetic, electrical resistivity, and ground gravity methods [17,53, [64 ...
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To characterize the concentration and spatial distribution of Pb and Zn in the study area, we conducted an exhaustive study across several dimensions, considering the …
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The Lead-Zinc mineralization in Ameri is hosted by Shales, which are probably parts of the slightly deformed cretaceous sedimentary rocks made up of essentially Albian shales and subordinate siltstones (Figure 2). The fractured zones or veins marked along the Enyigba and Ameka lodes
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The Mississippi Valley-type lead-zinc ore deposits of Cévennes region of southern France have frequently been attributed to syngenetic ore emplacement and epigenetic mineralization during Mesozoic continental extension.
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Geological Setting Lead-Zinc occurrences in Nigeria are reported to be associated with saline water intrusion in the sedimentary basins or fractured/shear zones in crystalline rocks. The …
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The epigenetic Pb-Zn deposits of the southern Benue Valley (Nigeria) are localized within Cretaceous sediments of an intracontinental rift basin. Fluid inclusion studies of vein minerals from the Abakaliki and Ishiagu orebodies show that sphalerite and quartz were deposited at relatively low temperatures (102–175 °C), with ore-fluid salinity mostly in the range of 17–25 equiv. wt% …
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Lead-zinc occurrences in Nigeria, especially in Southern Benue Trough (study area) are reported to be associated with saline water intrusion in the sedimentary basins or fractured/shear zones in crystalline rocks (NGSA, 2019). Lead-zinc mineralization in the upper Benue Trough is confined to well-defined steeply dipping fractures and
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The Yunnan Maoping and Huize lead–zinc deposits are important components of the Sichuan-Yunnan-Guizhou carbonate rock-type lead–zinc mineralization domain, and are the two most representative super-large deposits in the lead–zinc ore cluster in northeastern Yunnan.While both deposits are controlled by the Xiaojiangshen Fault and the Qujing …
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Wase, situated in Plateau State, is notable for lead and zinc mineralisation due to tectonic and hydrothermal activities in the region. The study utilises geophysical surveys to map …
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The past quarter century has seen major advances in the understanding of the genesis of Mississippi Valley-type (MVT) lead–zinc deposits (Fig. 1).Until the early 1980s, many workers believed that plate tectonics played no direct role and that MVT mineralization required little more than the presence of platformal carbonates.
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From Fig. 3, it can be found that the limestone of the Shidengzi Formation is the most favorable host for lead–zinc mineralization, followed by the sandstone of the Ceshui Formation (Zhu et al., 2022). The ore structures are predominantly dense massive, and mostly disseminated, ...
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The world's lead-zinc mineral resources: Scarcity, data, issues and opportunities. Author links open overlay panel Gavin M. Mudd a, Simon M. Jowitt b c, Timothy T. Werner a. ... given that a specific deposit is a set size as determined by the geology of the system that formed the mineralization, ongoing mining over time will deplete the deposit ...
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This lead-zinc mineralization is mainly hosted in a 'Transition Zone' of diagenetically altered limestone within a fractured dark dolomitic conglomerate lying at the evaporitic Triassic-Cretaceous contact. Particularly, along the N–S central area of Fej El Adoum numerous lead-zinc ore deposits and occurrences are known: Tabet Lahsan, Ain ...
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