Geochronology and petrogenesis of granitoid rocks from the Goryczkowa Unit, Tatra Mountains (Central Western Carpathians)
Geochronology and petrogenesis of granitoid rocks from the Goryczkowa Unit, Tatra Mountains (Central Western Carpathians)
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DOI：
10.2478/geoca-2013-0029
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发表时间：
2013-12
期刊：
影响因子：
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通讯作者：
J. Burda;A. Gawęda;U. Klötzli
中科院分区：
文献类型：
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作者：
J. Burda;A. Gawęda;U. Klötzli
摘要研究了西塔特拉山Goryczkowa结晶核中两套花岗岩类岩石的地球化学特征及LA-MC-ICP-MS锆石U-Pb年龄关系。岩石学研究表明，这两个花岗岩类套侵位在中地壳水平，在VAG（火山弧花岗岩）的构造环境。然而，这些套房不同的源材料熔融，并代表两个不同的岩浆阶段：套房1代表高温，氧化，前板碰撞侵入体，侵位在约。第2套岩浆为晚造山/深成岩浆，侵入时间约为371 Ma。350毫安。这些数据与塔特拉山结晶基底的强烈岩浆活动期相一致。花岗岩类的侵位晚于LP-HT区域变质/部分熔融作用。387 Ma和433-410 Ma，印记在继承锆石核中。
Abstract The geochemical characteristics as well as the LA-MC-ICP-MS U-Pb zircon age relationship between two granitoid suites found in the Goryczkowa crystalline core in the Western Tatra Mountains were studied. The petrological investigations indicate that both granitoid suites were emplaced at medium crustal level, in a VAG (volcanic arc granites) tectonic setting. However, these suites differ in source material melted and represent two different magmatic stages: suite 1 represents a high temperature, oxidized, pre-plate collision intrusion, emplaced at ca. 371 Ma while suite 2 is late orogenic/anatectic magma, which intruded at ca. 350 Ma. These data are consistent with a period of intensive magmatic activity in the Tatra Mountain crystalline basement. The emplacement of granitoids postdates the LP-HT regional metamorphism/ partial melting at ca. 387 Ma and at 433-410 Ma, imprinted in the inherited zircon cores.