40Ar/39Ar chronology and paleomagnetism of Quaternary basaltic lavas from the Perşani Mountains (East Carpathians)

Panaiotu, Cristian; Jicha, Brian R.; Singer, Brad S.; Ţugui, A.; Seghedi, Ioan; Panaiotu, A.; Necula, Cristian

doi:10.1016/j.pepi.2013.06.007

Cited by 30 publications

(26 citation statements)

References 55 publications

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“…Ar/Ar dating was performed for the basaltic rocks of 215 the Bakony-Balaton Upland volcanic fields that corroborated the reliability of the former 216 K/Ar data (Wijbrans et al, 2007). In contrast, the new Ar/Ar age data (Panaiotu et al, 2013) 217 refined significantly the former knowledge (Panaiotu et al, 2004) on the temporal evolution 218 of the Perşani volcanic field. So far, the available K/Ar data base provides a solid framework 219 for the temporal evolution of the alkaline basaltic volcanism in the Pannonian basin, although 220 more careful studies are necessary to define the recurrence rates in individual volcanic fields 221 more precisely and constrain the eruption age of the youngest volcanic episodes.…”

Section: (Stradner Kogel Klöch Steinberg) the Perşani Volcanic Fiementioning

confidence: 60%

Origin and geodynamic relationships of the Late Miocene to Quaternary alkaline basalt volcanism in the Pannonian basin, eastern–central Europe

Harangi

Jankovics

Sági

et al. 2014

Int J Earth Sci (Geol Rundsch)

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14Alkaline basaltic volcanism has been taking place in the Carpathian-Pannonian Region 15 since 11 Ma and the last eruptions occurred only at 100-500 ka. It resulted in scattered low-16 magma volume volcanic fields located mostly at the margins of the Pannonian basin. Many of 17 the basalts have compositions close to those of the primitve magmas and therefore can be 18 used to constrain the conditions of the magma generation. Low degree (2-3%) melting could 19 occur in the convective asthenosphere within the garnet-spinel transition zone. Melting started 20 at about 100 km depth and continued usually up to the base of the lithosphere. Thus, the final 21 melting pressure could indicate the ambient lithosphere-asthenosphere boundary. The 22 asthenospheric mantle source regions of the basalts were heterogeneous, presumably in small 23 scale, and included either some water or pyroxenite/eclogite lithology in addition to the fertile 24 to slightly depleted peridotite. Based on the prevailing estimated mantle potential temperature 25 This is reinforced by the detected low-velocity seismic anomalies in the upper mantle beneath 37 the volcanic fields. 38 39Manuscript Click here to download Manuscript: IJES_paper_2014_rev.docx Click here to view linked

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Section: (Stradner Kogel Klöch Steinberg) the Perşani Volcanic Fiementioning

confidence: 60%

Origin and geodynamic relationships of the Late Miocene to Quaternary alkaline basalt volcanism in the Pannonian basin, eastern–central Europe

Harangi

Jankovics

Sági

et al. 2014

Int J Earth Sci (Geol Rundsch)

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“…For studies accepted in PSV10, we do not exclude individual sites based on VGP colatitude, but we have explicitly excluded those studies or parts thereof that targeted excursional field states. For example, Panaiotu et al () preferentially sampled a series of lavas emplaced during the Cobb Mountain normal polarity subchron as part of their paleosecular variation study in the Persani Mountains, and subsequently reported some transitional directions. We chose to keep the Panaiotu et al () study in PSV10, but we excluded sites that were from the targeted subchron sampling effort.…”

Section: The Psv10 Compilationmentioning

confidence: 99%

“…For example, Panaiotu et al () preferentially sampled a series of lavas emplaced during the Cobb Mountain normal polarity subchron as part of their paleosecular variation study in the Persani Mountains, and subsequently reported some transitional directions. We chose to keep the Panaiotu et al () study in PSV10, but we excluded sites that were from the targeted subchron sampling effort. Although exclusion of transitional studies is an imperfect solutions we can assess its impact by making a crude estimate of the percentage of time the field might spend in transition, and comparing this with the percentage of such sites in PSV10.…”

Section: The Psv10 Compilationmentioning

confidence: 99%

PSV10: A Global Data Set for 0–10 Ma Time‐Averaged Field and Paleosecular Variation Studies

Cromwell

Johnson

Tauxe

et al. 2018

Geochem Geophys Geosyst

268

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Globally distributed paleomagnetic data from discrete volcanic sites have previously been used for statistical studies of paleosecular variation and the structure of the time‐averaged field. We present a new data compilation, PSV10, selected from high‐quality paleodirections recorded over the past 10 Ma and comprising 2,401 sites from 81 studies. We require the use of modern laboratory and processing methods, a minimum of four samples per site, and within‐site Fisher precision parameter, kw, ≥50. Studies that identify significant tectonic effects or explicitly target transitional field states are excluded, thereby reducing oversampling of transitional time intervals. Additionally, we apply two approaches using geological evidence to minimize effects of short‐term serial correlation. PSV10 is suitable for use in new global geomagnetic and paleomagnetic studies as it has greatly improved spatial coverage of sites, especially at equatorial and high latitudes. VGP dispersion is latitudinally dependent, with substantially higher values in the Southern Hemisphere than at corresponding northern latitudes when no VGP cutoff is imposed. Average inclination anomalies for 10° latitude bins range from about +3 ± 2° to −7.5 ± 2° for the entire data set, with the largest negative values occurring at equatorial and mid‐northern latitudes. New 0–5 Ma TAF models (LN3 and LN3‐SC) based on selections of normal polarity data from PSV10 indicate a g20 term that is 3.0% of g10. Non‐zonal variations in field structure are observed near the magnetic equator and in regions of increased radial flux at high latitudes over the Americas, the Indian Ocean, and Asia.

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“…The presence of numerous mantle xenoliths (Falus et al, 2008; Vaselli et al, 1995) in many of the PVF basalts makes the “archive” of mantle material at PVF even more appealing. A recent high precision Ar‐Ar study (Panaiotu et al, 2013) resolved the chronology of various basalts in the PVF in great detail. Earlier geochemical‐petrologic studies of the PVF (Downes et al, 1995; Harangi et al, 2013) report high‐quality data but are difficult to place in the temporal progression established by Panaiotu et al (2013).…”

Section: Introductionmentioning

confidence: 99%

“…A recent high precision Ar‐Ar study (Panaiotu et al, 2013) resolved the chronology of various basalts in the PVF in great detail. Earlier geochemical‐petrologic studies of the PVF (Downes et al, 1995; Harangi et al, 2013) report high‐quality data but are difficult to place in the temporal progression established by Panaiotu et al (2013). On the other hand, basalt petrology and especially those studies targeting dynamic processes in the mantle require understanding of the temporal evolution at the scale of the volcanic field (Blondes et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Temporal‐Geochemical Evolution of the Persani Volcanic Field, Eastern Transylvanian Basin (Romania): Implications for Slab Rollback Beneath the SE Carpathians

et al. 2020

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The Quaternary Persani volcanic field (PVF) consists of alkali basalts formed in an extensional basin at the SE end of the Transylvanian basin, near an important anomaly in the European mantle, the Vrancea slab, a seismically active near-vertical lithospheric fragment of debated origin. The PVF is the only basaltic field regionally, has been studied geochemically in the past, and is also known for the presence of abundant mantle xenoliths. Here, we describe new geochemical data on rocks recently dated by Ar-Ar chronometry and show that while we can reproduce virtually all previous results, there is a clear temporal evolution of the magmatic system. There is an increase of over 80°C in temperatures determined by the Si activity thermometer, from 1,300°C to 1,380°C during the~0.5-Myr duration of volcanic activity, which is accompanied by several coherent trends in geochemistry, among which the decrease of Zn/Fe and 87 Sr/ 86 Sr ratios over time. Earlier, higher Zn/Fe ratios are indicative of a pyroxenite/eclogite-dominated source, which gradually changed to a peridotite-dominated source. These characteristics are typical of a dynamic mantle in which vertical mantle lithosphere tectonics, either due to slab rollback or mantle dripping plays a role and are not consistent with simple decompression melting of asthenosphere. Synchronous adakitic rocks found about 25-30 km east of PVF are presumed to be slab melts and are consistent with the Vrancea slab rollback as the trigger for mantle melting responsible for the PVF.

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40Ar/39Ar chronology and paleomagnetism of Quaternary basaltic lavas from the Perşani Mountains (East Carpathians)

Cited by 30 publications

References 55 publications

Origin and geodynamic relationships of the Late Miocene to Quaternary alkaline basalt volcanism in the Pannonian basin, eastern–central Europe

Origin and geodynamic relationships of the Late Miocene to Quaternary alkaline basalt volcanism in the Pannonian basin, eastern–central Europe

PSV10: A Global Data Set for 0–10 Ma Time‐Averaged Field and Paleosecular Variation Studies

Temporal‐Geochemical Evolution of the Persani Volcanic Field, Eastern Transylvanian Basin (Romania): Implications for Slab Rollback Beneath the SE Carpathians

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