The Connection Between Stratiform Lead-Zinc Deposits in Carbonate Rocks and Oil-Producing and Saline Sequences

Pavlov, D. I.; Gorzhevskiy, D. I.; Bogashova, L. G.; Goleva, G. A.; Dobrovol’skaya, M. G.; Kalinko, M. K.; Kartsev, A.A.; Pék, A. A.; Shadlun, T. N.; Blokh, A. M.; Donets, A. I.; Limonova, L. P.

doi:10.1080/00206818809466039

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…According to popular ideas [Leach et al, 2005], the formation of these ores was determined by tectonic deformations and metasomatic changes in the ore-bearing strata of the subplatform cover. Deposits of this type are localized on the flanks of intra-and pericratonic basins formed in the extensional regime of the passive margin with terrigenous-carbonate sedimentation with hydrocarbon specialization and crustal sources of metals and sulfur [Gorzhevsky and Makeeva, 1982;Leach et al, 2005;Pavlov and Galyamov, 1988;Ruchkin and Donets, 2002]. At the same time, the deposits gravitate towards deep sedimentary basins in the upper and middle layers of the sedimentary non-metamorphosed crust.…”

Section: Sedimentary Cover and Pb-zn Deposits Of Mvt Typementioning

confidence: 99%

The Polymetallic Deposits of the Western European Plate and Structure of the Earth's Crust According to GOCE Gravity Data

Galyamov,

Volkov,

Lobanov

2024

Russian Journal of Earth Sciences

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For the first time, the results of modern studies of the earth's crust based on gravity data from the GOCE satellite Project are used for a comparative regional metallogenic analysis of the geodynamic settings of the formation of polymetallic deposits in Western Europe and the Mediterranean segment of the Tethys belt. It is shown that exhalative sulfide deposits (SEDEX) and cuprous sandstones and shales (SSC) are mainly located in the earth's crust with a predominant development of the lower “basalt” layer of the earth's crust. Pyrite copper and lead-zinc deposits in volcanogenic rocks (VMS), as well as some occurrences of the SEDEX type, are found in supra-subduction island-arc and accretionary crustal settings with a predominant development of the middle “granite” layer. Lead-zinc ores of the Mississippi type (MVT) are localized in deep pericratonic sedimentary basins with petroleum-bearing specialization on the shelf and continental slope, regardless of the stratification of the earth's crust. The results obtained can be used for regional forecasting and metallogenic constructions, prospecting and assessment of new deposits.

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Section: Sedimentary Cover and Pb-zn Deposits Of Mvt Typementioning

confidence: 99%

The Polymetallic Deposits of the Western European Plate and Structure of the Earth's Crust According to GOCE Gravity Data

Galyamov,

Volkov,

Lobanov

2024

Russian Journal of Earth Sciences

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Classification of Polymetallic Ore-Forming Processes and Transitional VMS–SEDEX–MV-type: the Example of the Giant Ozernoe Deposit in Transbaikalia, Russia

et al. 2023

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Classification of Polymetallic Ore-Forming Processes and Transitional VMS–SEDEX–MV-type: the Example of the Giant Ozernoe Deposit in Transbaikalia, Russia

Vikentye,

Damdinov,

Minina

et al. 2023

Geologiâ rudnyh mestoroždenij

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This article discusses the general classification approaches and key features of different families of polymetallic deposits, with particular attention to the largest in Eurasia Ozernoe polymetallic deposit located in Western Transbaikalia and thoroughly explored 50 years ago. The main groups (or families) of polymetallic deposits in the English-language literature are identified by brief names: volcanogenic massive sulphide (VMS), sedimentary exhalative (SEDEX), and Mississippi Valley type (MVT). Within these three families of deposits, there are many additional types/subtypes, a large number of which are mostly due to the incompleteness and inconsistency of accumulated knowledge on the genesis of polymetallic deposits. Overall, all Pb–Zn(Ag,Cu) deposits—both those that are considered syngenetic, forming on and near the seafloor (VMS and SEDEX), and epigenetic low-temperature ones (MVT)—demonstrate a wide range of features that distinguish and bring together these families. This also applies to the types and subtypes of mineral deposits identified within them. One of the most complex objects for geological–genetic classification is the Ozernoe deposit studied by the authors, which, in terms of the nature of the host rocks, is intermediate between the end members of all three families: SEDEX, VMS and MVT. The deposit is localized in volcanic–carbonate–terrigenous rocks of the Cambrian Oldynda formation, but the age and stratigraphic affiliation of the ore-bearing series remain a matter of debate. The Ozernoe deposit is a combination of massive sulfide and siderite ore beds, ore breccia horizons, low-carbonate aleuropelite members, limestones, fine detrital tuffites, lavas, and tuffs. The sulfide bodies are confined to several stratigraphic levels, and the main productive unit thickness reaches 230 m. The thickness is comprised of 12 mineral lodes, a series of stratified ore bodies separated by gangue layers of sedimentary and volcaniclastic rocks. The primary ore minerals are pyrite, sphalerite, and galena, while the minor minerals include magnetite, chalcopyrite, marcasite, tetrahedrite, and arsenopyrite. There are two main theories regarding the origin of the ore: volcanogenic–sedimentary and hydrothermal–metasomatic. The hydrothermal–sedimentary theory remains the prevailing hypothesis, but there are many indications that epigenetic hydrothermal–metasomatic and dynamic metamorphic processes have contributed to the formation of the deposit. These include the appearance of sulfide–quartz and quartz–carbonate–sulfide veins and vein zones in fine-grained “layered” ores, with large crystalline sphalerite and galena; multiple signs of ore recrystallization, including the formation of pyrite porphyroblasts and arsenopyrite metacrystals; and the formation of solid pyrrhotite and pyrrhotite–magnetite ores with a lenticular-striped, gneissic structure. These observations suggest that different processes, both hydrothermal–sedimentary and metamorphogenetic–metasomatic, were involved in the formation of the Ozernoe deposit. In other words, primary hydrothermal–sedimentary ores were redeposited by late hydrothermal solutions. Nevertheless, many issues concerning the genesis of the Ozernoe deposit remain unresolved.

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The Connection Between Stratiform Lead-Zinc Deposits in Carbonate Rocks and Oil-Producing and Saline Sequences

Cited by 3 publications

References 5 publications

The Polymetallic Deposits of the Western European Plate and Structure of the Earth's Crust According to GOCE Gravity Data

The Polymetallic Deposits of the Western European Plate and Structure of the Earth's Crust According to GOCE Gravity Data

Classification of Polymetallic Ore-Forming Processes and Transitional VMS–SEDEX–MV-type: the Example of the Giant Ozernoe Deposit in Transbaikalia, Russia

Classification of Polymetallic Ore-Forming Processes and Transitional VMS–SEDEX–MV-type: the Example of the Giant Ozernoe Deposit in Transbaikalia, Russia

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