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首页> 外文期刊>International Journal of Earth Sciences >Permian A‑type granites of the Western Carpathians and Transdanubian regions: products of the Pangea supercontinent breakup
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Permian A‑type granites of the Western Carpathians and Transdanubian regions: products of the Pangea supercontinent breakup

机译：西喀尔巴阡西部喀尔巴阡山脉和跨多边班地区的二叠纪型花岗岩：Pangea超大型分手的产品

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摘要

Permian biotite leucogranites to granite porphyries and rhyolites form small intrusions in several Alpine tectonic units in the Western Carpathians and the Pannonian region (Slovakia and Hungary). Their A-type signature is inferred from main- and trace-element geochemistry, with high K, Rb, Y, REE, Zr, Th, Nb, Fe/Mg and Ga/Al, low Al, Mg, Ca, P, Sr, V and strong negative Eu-anomaly. This geochemical signature is further supported by the mineralogy comprising local hypersolvus alkali feldspars, annitic biotite and the presence and composition of HFSE accessory minerals. The delta O-18 values measured for zircon (mean value 8.3 parts per thousand +/- 0.36) may be explained by the melting of igneous material of crustal origin and/or mantle basalts which interacted with low-temperature fluids. The in-situ SHRIMP U-Pb isotope dating of zircon from the granites highlights two different periods of magmatic crystallisation and pluton emplacement: the older 281 +/- 3 Ma Cisuralian age in the southern part, Velence Hills in the Pannonian region (Transdanubian Unit) and younger Guadalupian ages in the northern part, the West-Carpathian area: 262 +/- 4 Ma (Turcok, Gemeric Unit), 267 +/- 2 Ma (Hroncok, Veporic Unit) and 264 +/- 3 Ma (Upohlav, granitic pebbles in Cretaceous conglomerates of the Pieniny Klippen Belt). The similar to 280 to 260-Ma interval is simultaneous with post-orogenic or anorogenic, rift-related and mainly alkaline (A-type) magmatism on the broader European scale. Our study documents a close relationship between the Permian continental rifting and the Neotethyan Meliatic oceanic basin opening in the Middle Triassic. The A-type granites originated from the partial melting of the ancient lower crustal quartzo-feldspatic rocks with the possible contribution of meta-basic material from the mantle in an extensional tectonic regime consistent with disintegration of the Pangea supercontinent during the Permian-Triassic period.
机译：二叠纪的Biotite Leucogranites到花岗岩斑岩和流鼻耳，在西喀尔巴阡山脉和Pannonian地区（斯洛伐克和匈牙利）中的几种高山构造单位形成小侵犯。他们的A型签名是从主要和痕量元素地球化学推断出高k，rb，y，ree，zr，th，nb，fe / mg和ga / al，低Al，mg，ca，p，sr ，v和强烈的负面欧盟异常。该地球化学签名进一步得到矿物学，包括局部疗效碱金属群岛，Annitch Biotite和HFSE辅助矿物的存在和组成。通过与低温流体相互作用的油炸材料的熔化，可以解释对锆石（平均值8.3份/ +/0.36）测量的ΔO-18值可以解释。来自花岗岩的锆石原位虾U-Pb同位素约会突出了两种不同的岩浆结晶和勘方蓄水期：南部的281 +/- 3 MA窗扇年龄，Pannonian地区的Velence山（Transdanubian ober） ）和北部的年轻瓜达卢佩斯年龄，西喀尔巴阡山脉地区：262 +/- 4 ma（Turcok，宝石，veporic单位），267 +/- 2 ma（veporic单位）和264 +/- 3 ma（Upohlav ，Pieniny Klippen皮带的白垩纪集团花岗岩鹅卵石）。类似于280至260 mA的间隔是在更广泛的欧度范围内同时具有眶后或病变，裂谷相关和主要碱性（A型）岩浆。我们的研究记录了Median Continental Rifting和MeTethyan亚热血管盆地在中间三叠系中开口的密切关系。 A型花岗岩源于古代下层石英岩的部分熔化，在突出的构造制度中，在突出的构造政权中可能贡献Meta基本材料，这是在二叠纪 - 三叠纪期间超大张力的崩解。

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  • 来源
    《International Journal of Earth Sciences》 |2021年第6期|2133-2155|共23页
  • 作者

    Ondrejka Martin; Uher Pavel; Putis Marian; Kohut Milan; Broska Igor; Larionov Alexander; Bojar Ana-Voica; Sobocky Tomas;

  • 作者单位

    Comenius Univ Fac Nat Sci Dept Mineral Petrol & Econ Geol Ilkovicova 6 Bratislava 84215 Slovakia;

    Comenius Univ Fac Nat Sci Dept Mineral Petrol & Econ Geol Ilkovicova 6 Bratislava 84215 Slovakia;

    Comenius Univ Fac Nat Sci Dept Mineral Petrol & Econ Geol Ilkovicova 6 Bratislava 84215 Slovakia;

    Slovak Acad Sci Earth Sci Inst POB 106 Dubravska Cesta 9 Bratislava 84005 Slovakia;

    Slovak Acad Sci Earth Sci Inst POB 106 Dubravska Cesta 9 Bratislava 84005 Slovakia;

    Russian Geol Res Inst VSEGEI Sredny Prospekt 74 St Petersburg 199106 Russia;

    Salzburg Univ Dept Geol & Geodynam Hellbrunnerstr 34 A-5020 Salzburg Austria|Universalmuseum Joanneum Study Ctr Nat Hist Mineral Weinzottlstr 16 A-8045 Graz Austria;

    Comenius Univ Fac Nat Sci Dept Mineral Petrol & Econ Geol Ilkovicova 6 Bratislava 84215 Slovakia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    A-type granites; Zircon; SHRIMP U-Pb age; Geochemistry; Permian; Western Carpathians; Pannonian area; Pangea breakup;

    机译：一个型花岗岩;锆石;虾U-PB年龄;地球化学;二叠纪;西喀尔巴阡山脉;Pannonian地区;Pangea分手;

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