Tracing widespread Early Miocene ignimbrite eruptions and petrogenesis at the onset of the Carpathian-Pannonian Region silicic volcanism
Tracing widespread Early Miocene ignimbrite eruptions and petrogenesis at the onset of the Carpathian-Pannonian Region silicic volcanism
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追踪喀尔巴阡-潘诺尼亚地区硅质火山活动开始时广泛的早中新世冰凝灰岩喷发和岩石成因
DOI：
10.1016/j.gr.2022.12.015
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发表时间：
2023
影响因子：
6.1
通讯作者：
Brčić, Vlatko
中科院分区：
文献类型：
--
作者：
Brlek, Mihovil;Richard Tapster, Simon;Schindlbeck-Belo, Julie;Gaynor, Sean P.;Kutterolf, Steffen;Hauff, Folkmar;Georgiev, Svetoslav V.;Trinajstić, Nina;Šuica, Sanja;Brčić, Vlatko
喀尔巴阡-潘诺尼亚地区（CPR）在早中新世和中中新世期间，与潘诺尼亚盆地的主要岩石圈变薄同时，发生了欧洲最大的火山喷发。这被记录为约18.1-14.4 Ma的熔结凝灰岩耀斑事件。为了深入了解CPR火山活动开始时的喷发年代学、火山灰地层学和岩石成因，我们采用了多代理方法，从北方CPR到Dinaride湖系统，对中新世早期的流纹质熔结凝灰岩和火山碎屑瀑布沉积物进行了研究。高精度的锆石U-Pb年代学将下中新统火山岩划分为两组，分别为18.1Ma和17.3Ma。基于综合火山灰地层特征，我们提出，18.1 Ma Kalnik和17.3 Ma埃格火山爆发产生了广泛的（中间）大型破火山口形成的大量流纹质熔结凝灰岩，沉积在CPR的北方和西南部地区。由于东风将火山灰带到西南方向数百公里处，埃格火山喷发产物也到达了远端的迪纳里德山内湖盆，记录为火山碎屑瀑布沉积物。不均匀的主元素和微量元素组成的18.1马火山玻璃碎片表明，Kalnik喷发来源于复杂的岩浆系统，与两个离散的熔体在喷发过程中同时攻丝。17.3Ma玻璃的均匀地球化学成分与老玻璃不同。综合锆石和散装玻璃钕铪同位素组成具有正相关性，定义了区域地幔阵列，并在火山活动的年轻阶段更放射性成因。记录系统的同位素变化，从更老的地壳签名年轻的少年组成，意味着在潘诺尼亚盆地的岩石圈变薄的时期，该地区经历了更复杂的变化，交代岩石圈幔源岩浆和各种地壳成分之间的相互作用比以前认识到的。
The Carpathian-Pannonian Region (CPR) hosted some of the largest silicic volcanic eruptions in Europe during the Early and Middle Miocene, contemporaneously with major lithospheric thinning of the Pannonian Basin. This was recorded as an ignimbrite flare-up event from approximately 18.1–14.4 Ma. To gain in-depth perspectives on the eruption chronology, tephrostratigraphy, and petrogenesis at the onset of CPR silicic volcanism, we applied a multi-proxy approach to Lower Miocene rhyolitic ignimbrites and pyroclastic fall deposits from the northern CPR to the Dinaride Lake System. High-precision zircon U-Pb geochronology distinguished two Lower Miocene groups of volcaniclastic rocks at ∼ 18.1 Ma and ∼ 17.3 Ma. Based on combined tephrostratigraphic signatures we propose that the ∼ 18.1 Ma Kalnik and ∼ 17.3 Ma Eger eruptions produced widespread (intermediate to) large caldera-forming massive rhyolitic ignimbrites, deposited across northern and southwestern regions of the CPR. Due to easterly winds that carried volcanic ash hundreds of kilometers to the southwest, Eger eruption products also reached distal intra-montane Dinaride lacustrine basins, recorded as pyroclastic fall deposits. Heterogeneous major and trace elemental compositions of ∼ 18.1 Ma volcanic glass shards suggest that the Kalnik eruption was sourced from complex silicic magmatic systems, with simultaneous tapping of two discrete melt bodies during the eruption. The homogeneous geochemical composition of ∼ 17.3 Ma glasses is distinct from the older glasses. Integrated zircon and bulk glass Nd-Hf isotope compositions have a positive correlation, defining a regional mantle array, and are more radiogenic in the younger phase of volcanism. The recorded systematic isotopic change, moving from older more crustal signatures to younger more juvenile compositions, imply that during the period of lithospheric thinning of the Pannonian Basin the region underwent more complex variations in the interaction between metasomatized lithospheric mantle-derived magmas and various crustal components than previously recognized.
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影响因子：
42.1
作者：
C. Wilson;G. Cooper;K. Chamberlain;S. Barker;M. Myers;F. Illsley‐Kemp;J. Farrell
通讯作者：
C. Wilson;G. Cooper;K. Chamberlain;S. Barker;M. Myers;F. Illsley‐Kemp;J. Farrell
影响因子：
3.7
作者：
J. Schindlbeck;S. Kutterolf;A. Freundt;S. Eisele;Kuo-Lung Wang;M. Frische
通讯作者：
J. Schindlbeck;S. Kutterolf;A. Freundt;S. Eisele;Kuo-Lung Wang;M. Frische
DOI：
10.3389/feart.2020.543399
发表时间：
2020-10
期刊：
--
影响因子：
--
作者：
Aurora Silleni;G. Giordano;R. Isaia;M. Ort
通讯作者：
Aurora Silleni;G. Giordano;R. Isaia;M. Ort
影响因子：
3.7
作者：
J. Schindlbeck;S. Kutterolf;A. Freundt;G. Alvarado;K.‐L. Wang;S. Straub;S. Hemming;M. Frische;J. Woodhead
通讯作者：
J. Schindlbeck;S. Kutterolf;A. Freundt;G. Alvarado;K.‐L. Wang;S. Straub;S. Hemming;M. Frische;J. Woodhead
与匈牙利北部中新世硅质火山碎屑岩相关的岩石地层单元的正式定义和描述：修订
影响因子：
1.3
作者：
R. Lukács;S. Harangi;P. Gál;J. Szepesi;A. Di Capua;G. Norini;R. Sulpizio;G. Groppelli;L. Fodor
通讯作者：
L. Fodor