Dawid Szymanowski

Last Name

Szymanowski

First Name

Dawid

ORCID

0000-0001-9524-5710

Organisational unit

09656 - Chelle-Michou, Cyril / Chelle-Michou, Cyril

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Publications 1 - 10 of 57

Contrasted sources of metals between small and giant sediment-hosted Pb-Zn deposits in the San Vicente district, Peru
Chelle-Michou, Cyril; Bastian, Lena; Filoche, Candice; et al. (2023)
Proceedings of the 17th SGA Biennial Meeting. Volume 2
The source of metals (Zn-Pb) in carbonatehosted, Mississippi Valley-type deposits can be traced through Pb isotopic fingerprinting of ore minerals (sulphides). In this work we revisit the Pb isotopic systematic of the giant Zn-Pb deposit of San Vicente Peru, in light of an updated methodological and conceptual framework. Our new, high-precision (ID-TIMS) Pb isotopic dataset allows a distinction between different mineralization localities and stages in the San Vicente district. The largest deposit, San Vicente, displays a much wider range of radiogenic Pb compositions (Pb-206/Pb-204 = 18.8-19.3) than smaller mineralized occurrences, which form two clusters at less radiogenic Pb values (Pb-206/Pb-204 = 18.8-18.9 and similar to 18.6). While a more expansive study of potential regional source rocks is required to trace metal transport in the district, this dataset already confirms the growing body of evidence for a more diverse source of metals in giants than in small MVT deposits.
Evaluating the Potential of Rhyolitic Glass as a Lithium Source for Brine Deposits
Ellis, Ben S.; Szymanowski, Dawid; Harris, Chris; et al. (2022)
Economic Geology
Lithium is an economically important element that is increasingly extracted from brines accumulated in continental basins. While a number of studies have identified silicic magmatic rocks as the ultimate source of dissolved brine lithium, the processes by which Li is mobilized remain poorly constrained. Here we focus on the potential of low-temperature, post-eruptive processes to remove Li from volcanic glass and generate Li-rich fluids. The rhyolitic glasses in this study (from the Yellowstone-Snake River Plain volcanic province in western North America) have interacted with meteoric water emplacement as revealed by textures and a variety of geochemical and isotopic signatures. Indices of glass hydration correlate with Li concentrations, suggesting Li is lost to the water during the water-rock interaction. We estimate the original Li content upon deposition and the magnitude of Li depletion both by direct in situ glass measurements and by applying a partition-coefficient approach to plagioclase Li contents. Across our whole sample set (19 eruptive units spanning ca. 10 m.y.), Li losses average 8.9 ppm, with a maximum loss of 37.5 ppm. This allows estimation of the dense rock equivalent of silicic volcanic lithologies required to potentially source a brine deposit. Our data indicate that surficial processes occurring post-eruption may provide sufficient Li to form economic deposits. We found no relationship between deposit age and Li loss, i.e., hydration does not appear to be an ongoing process. Rather, it occurs primarily while the deposit is cooling shortly after eruption, with δ18O and δD in our case study suggesting a temperature window of 40° to 70°C.
U-Th zircon dating reveals a correlation between eruptive styles and repose periods at the Nisyros-Yali volcanic area, Greece
Popa, Răzvan-Gabriel; Guillong, Marcel; Bachmann, Olivier; et al. (2020)
Chemical Geology
Water-rich silicic magmas are capable of erupting effusively and explosively, and this drastic change in eruptive styles, termed effusive-explosive transition, has important implications in managing volcanic hazards. Some volcanoes exhibit effusive-explosive transitions during the same eruptive event, while others show this behavior between different eruptions. In the latter case, magma chamber processes induce physical-chemical changes in the magma, which can favor either effusivity or explosivity. This is the case for the Nisyros-Yali volcanic center, from the South Aegean Sea. In the recent stages of activity (past 120 ky), the volcanic area generated eight rhyolitic effusive and explosive events (five on the island of Nisyros and three on the island of Yali), including two caldera-forming eruptions. Changes of water content, temperature and pre-eruptive water-saturation between effusive and explosive deposits point to a potential time-dependency between the two eruptive styles. We investigate this time-dependency by applying Usingle bondTh disequilibrium dating to zircon crystals. Our eruptive age estimates of the investigated units range from 118.7 ± 10 ka to 19.9 ± 1.5 ka for Nisyros, and from 40 ± 5.2 ka to 22.7 ± 1.6 ka for Yali. Yali volcano has developed after the two caldera-forming events on Nisyros, which occurred at 63.1 ± 4.7 ka and 58.4 ± 2.7 ka. Yali marks the transition to a more geometrically complex system, where the upper-crustal silicic mush hosts at least two eruptible magma chambers (one under Yali, and one under Nisyros). The eruptive styles at both volcanoes seem to be correlated with the length of the repose periods. Effusive events occur after longer periods of volcanic quiescence, while explosive events are generated after shorter periods of repose of ~5–10 ky, which can be extended based on eruption age uncertainty to <18 ky for Nisyros and <12 ky for Yali. This observation is explained by the physical state of the volatiles in the magma chamber, with longer repose periods favoring volatile build-up. This can lead to water-supersaturation at storage pressures which was shown to favor effusivity. Based on this interpretation, both Nisyros and Yali volcanoes are presently in the effusive time window, which makes it probable for the next eruptions to be non-explosive.
Primary petrology, mineralogy and age of the Letšeng-la-Terae kimberlite (Lesotho, Southern Africa) and parental magmas of Group-I kimberlites
Stamm, Natalia; Schmidt, Max W.; Szymanowski, Dawid; et al. (2018)
Contributions to Mineralogy and Petrology
Condensation for concentration: relationships between sedimentation rate and phosphogenesis in reworked sediments of the Monterey Formation of central California
Anttila, Eliel S.C.; Macdonald, Francis; Szymanowski, Dawid; et al. (2024)
Goldschmidt 2024 Abstract
Strata of the Miocene Monterey Formation have been the subject of geological inquiry for nearly a century, and serve as the primary source and reservoir rock for the majority of California’s hydrocarbon resources. Phosphorites of the Monterey Formation, which are found throughout central California, have been associated with periods of intensified upwelling and productivity in the Miocene Californian borderlands. Here, we contextualize the organic carbon- and phosphate-rich strata of the Monterey formation within a new chronostratigraphic framework. New high-resolution age models, constrained by U-Pb ages on zircon derived from volcanic ashes intercalated within Monterey Fm strata, reveal significant variability in modeled sedimentation rates at multiple localities in the Santa Barbara and Santa Maria basins. These age models demonstrate that concentrated phosphogenesis occurred diachronously across the Californian borderlands, and that both total organic carbon and authigenic phosphate (calcium fluorapatite) concentrations in Monterey Formation strata are inversely correlated with sedimentation rate. The most concentrated phosphorite horizons in the Monterey Formation are associated with local nadirs in sedimentation rate, and are the product of localized winnowing and reworking of previously-deposited sediments. Laterally discontinuous phosphorite horizons incorporate authigenic phosphate clasts derived from underlying and adjacent shale horizons, with winnowed accumulations of these clasts serving as the host substrate for subsequent precipitation of additional calcium fluorapatite. Instead of productivity and upwelling, we propose a model in which both phosphogenesis and total organic carbon contents in the Monterey Formation are primarily modulated by sedimentation rate, which was in turn controlled by a combination of local tectonics and eustasy.
Onset of long-lived silicic and alkaline magmatism in eastern North America preceded Central Atlantic Magmatic Province emplacement
Kinney, Sean T.; MacLennan, Scott A.; Szymanowski, Dawid; et al. (2022)
Geology
The White Mountain magma series is the largest Mesozoic felsic igneous province on the eastern North American margin. Previous geochronology suggests that magmatism occurred over 50 m.y., with ages for the oldest units apparently coeval with the ca. 201 Ma Central Atlantic Magmatic Province, the flood basalt province associated with the end-Triassic mass extinction and the opening of the Atlantic Ocean. We use zircon U-Pb geochronology to show that emplacement of White Mountain magma series plutons was already underway at 207.5 Ma. The largest volcanic-plutonic complex, the White Mountain batholith, was emplaced episodically from ca. 198.5 Ma to ca. 180 Ma and is ~25 m.y. older than published ages suggest, and all samples we dated from the Moat Volcanics are between ca. 185 Ma and 180 Ma. The Moat Volcanics and the White Mountain batholith are broadly comagmatic, which constrains the age of a key Jurassic paleomagnetic pole. Our data indicate that a regional mantle thermal anomaly in eastern North America developed at least 5 m.y. prior to the main stage of Central Atlantic Magmatic Province flood basalt volcanism and suggest a geodynamic link between the White Mountain magma series and the Central Atlantic Magmatic Province.
A waning Saxothuringian Ocean evidenced in the Famennian tephra-bearing siliceous succession of the Bardo Unit (Central Sudetes, SW Poland)
Racki, Grzegorz; Mazur, Stanisław; Narkiewicz, Katarzyna; et al. (2022)
GSA Bulletin
A tephra-rich cherty-clayey Famennian succession within the major Brzeźnica olistostrome in the Bardo Mountains, Central Sudetes, SW Poland, preserves a record of the lost ocean later incorporated into the Variscan orogenic belt. Fluctuating but mostly oligotrophic regimes and low primary production levels were influenced by weak upwelling below the perennial oxygen minimum zone, which controlled the interplay between biosiliceous and siliciclastic deposition in the oceanic basin, with episodic oxygen deficiency. The Hangenberg Black Shale has been identified in this oceanic setting based on its characteristics described worldwide (including mercury enrichments). A tectonic uplift of the sediment source area near the Devonian-Carboniferous boundary, recorded in the distinguishing provenance signal of old continental crust, was paired with a global transgression, anoxia, and volcanic episode in an interglacial interval. Assuming paleogeographic affinity with the Bavarian facies of the Saxothuringian terrane, we interpret the allochthonous sediments as part of an accretionary prism that was gravitationally redeposited into the late orogenic basin in front of advancing Variscan nappes. The oceanic basin parental to the Bardo pelagic succession is therefore thought to represent a tract of the waning Saxothuringian Ocean in the Peri-Gondwanan paleogeographic domain that was eventually subducted beneath the Brunovistulian margin of Laurussia. The sediments of the Bardo Ocean basin also include a distal record of Famennian explosive volcanic activity that was likely related to a continental magmatic arc whose remnants are preserved as the Vrbno Group of the East Sudetes.
Lateral magma propagation during the emplacement of La Gloria Pluton, central Chile
Gutiérrez, Francisco; Payacán, Italo; Szymanowski, Dawid; et al. (2018)
Geology
La Gloria Pluton (LGP) in central Chile is a shallow, north-northwest–elongated granitoid body of 18 km length and 4–6 km width, belonging to a regional north-south trend of Miocene plutons, from the San Francisco Batholith and porphyries in the north, to Mesón Alto, and San Gabriel in the south. New U-Pb zircon ages of the LGP indicate that crystallization occurred mostly within an interval between 11.3–10.2 Ma, with a pattern of decreasing ages along the pluton axis from south to north. The progression of zircon ages can be explained either by gradual northwestward migration of the feeder zone that supplied magma to the shallow pluton or, more likely, by shallow lateral magma propagation southeastward from a fixed feeder zone located beneath the northern margin of the pluton. The age progression, together with existing data of subhorizontal mineral and magnetic lineations in the LGP parallel to the pluton axis, indicate lateral propagation of magma during reservoir construction along the hinge of an anticline of the volcanic host sequences. In addition to controlling the position of possible volcanic output, such horizontal migration of silicic magmas in the upper crust significantly increases the surface footprint over which fluids are exsolved and outgas, strongly decreasing the potential for magmatic–hydrothermal ore formation above laterally emplaced laccoliths in the shallow crust.
Mineral-scale evolution of voluminous rhyolites of the Heise volcanic field, eastern Snake River Plain, Idaho, USA
Szymanowski, Dawid (2014)
Obsidian pyroclasts in the Yellowstone-Snake River Plain ignimbrites are dominantly juvenile in origin
Monnereau, L.R.; Ellis, Ben S.; Szymanowski, Dawid; et al. (2021)
Bulletin of Volcanology
Dense, glassy pyroclasts found in products of explosive eruptions are commonly employed to investigate volcanic conduit processes through measurement of their volatile inventories. This approach rests upon the tacit assumption that the obsidian clasts are juvenile, that is, genetically related to the erupting magma. Pyroclastic deposits within the Yellowstone-Snake River Plain province almost without exception contain dense, glassy clasts, previously interpreted as hyaloclastite, while other lithologies, including crystallised rhyolite, are extremely rare. We investigate the origin of these dense, glassy clasts from a coupled geochemical and textural perspective combining literature data and case studies from Cougar Point Tuff XIII, Wolverine Creek Tuff, and Mesa Falls Tuff spanning 10 My of silicic volcanism. These results indicate that the trace elemental compositions of the dense glasses mostly overlap with the vesiculated component of each deposit, while being distinct from nearby units, thus indicating that dense glasses are juvenile. Textural complexity of the dense clasts varies across our examples. Cougar Point Tuff XIII contains a remarkable diversity of clast appearances with the same glass composition including obsidian-within-obsidian clasts. Mesa Falls Tuff contains clasts with the same glass compositions but with stark variations in phenocryst content (0 to 45%). Cumulatively, our results support a model where most dense, glassy clasts reflect conduit material that passed through multiple cycles of fracturing and sintering with concurrent mixing of glass and various crystal components. This is in contrast to previous interpretations of these clasts as entrained hyaloclastite and relaxes the requirement for water-magma interaction within the eruptive centres of the Yellowstone-Snake River Plain province.

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Dawid Szymanowski

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