LA-ICP-MS U-Pb dating and REE patterns of apatite from the Tatra Mountains, Poland as a monitor of the regional tectonomagmatic activity

Abstract

This study presents apatite LA-ICP-MS U-Pb age and trace elements concentrations data from different granite types from the Tatra Mountains, Poland. Apatite from monazite and xenotimebearing High Tatra granite was dated at 339 ± 5 Ma. The apatite LREE patterns reflect two types of magmas that contributed to this layered magma series. Apatite from a hybrid allanite-bearing diorite from the Goryczkowa Unit was dated at 340 ± 4 Ma with apatite LREE depletion reflecting the role of allanite and titanite during apatite crystallization. Apatite crystals from a hybrid cumulative rock from the Western Tatra Mountains were dated at 344 ± 3 Ma. Apatite is one of the main REE carriers in this sample and exhibit flat REE patterns. Taking into account the relatively low closure temperature of the U-Pb system in apatite (350-550°C), the c. 340 Ma apatite ages mark the end of high temperature tectonometamorphic activity in the Tatra Mountains.

Episodic construction of the Tatra granitoid intrusion (Central Western Carpathians, Poland/Slovakia): consequences for the geodynamics of Variscan collision and Rheic Ocean closure

“…340 Ma with an approximate 30°/m.y. cooling rate (Moussallam et al 2012) post-dated granite intrusion which is consistent with U-Pb apatite cooling ages of ca 340 Ma (Gawęda et al 2014).…”

Variscan post-collisional cooling and uplift of the Tatra Mountains crystalline block constrained by integrated zircon, apatite and titanite LA-(MC)-ICP-MS U-Pb dating and rare earth element analyses

“…Polygenetic granitoid plutonism was formed by repeated magma injections from c. 370 to c. 340 Ma based on LA-ICP-MS U-Pb zircon dating (Gawęda et al, 2016a and references therein), with relatively rapid cooling at c. 340 Ma constrained by LA-ICP-MS U-Pb apatite dating (Gawęda et al, 2014). The metamorphic envelope to the polygenetic granitoid intrusions is exposed in the western part of the massif on both sides of the granitoid pluton, and underwent two stages of migmatization at c. 365 Ma and at c. 359 Ma (Burda and Gawęda, 2009;Fig.…”

Multiple low-temperature thermochronology constraints on exhumation of the Tatra Mountains: New implication for the complex evolution of the Western Carpathians in the Cenozoic

“…The complex consists (from the bottom to the top) of the following: (i) the crystalline basement core that formed during the Variscan orogeny in the Carboniferous and constitutes a major portion of the mountain range [e.g., Janák , ; Janák et al ., , ; Nemčok et al ., ; Nemčok and Nemčok , ; Putiš , ]. The basement core is composed of magmatic rocks (granites, granodiorites, and tonalites) dated as 350–290 Ma (U‐Pb and Rb‐Sr data) [ Burchart , ; Burda et al ., ; Gawęda , ; Gawęda et al ., ; Poller et al ., , ; Poller and Todt , ], and by medium‐ to high‐grade metamorphic rocks (gneisses, migmatites, mica‐schists, and amphibolites) with metamorphic ages of 357–322 Ma (Ar/Ar data) [ Dallmeyer et al ., , ; Kohút and Sherlock , ; Maluski et al ., ; Moussallam et al ., ], exposed in the western part of the range [ Janák , ; Janák et al ., , ; Nemčok et al ., ; Nemčok and Nemčok , ; Putiš , ]; (ii) autochtonous Upper Paleozoic‐Mesozoic sedimentary cover, contouring the crystalline core from the north [ Plašienka et al ., ; Plašienka , ]; and (iii) two allochthonous nappes (the so‐called Krížna Nappe (Fatricum) and Choč Nappe (Hronicum)) [ Plašienka et al ., ] that are composed of analogous Mesozoic rocks preserved mostly along the northern margin of the range (Figure a).…”