Inherited or not inherited: Complexities in dating the atypical ‘cold’ Chopok granite (Nízke Tatry Mountains, Slovakia)
Inherited or not inherited: Complexities in dating the atypical ‘cold’ Chopok granite (Nízke Tatry Mountains, Slovakia)
复制标题
遗传或非遗传：非典型“冷”Chopok 花岗岩（斯洛伐克 Názke Tatry 山脉）测年的复杂性
DOI：
10.1016/j.gr.2020.05.018
复制
发表时间：
2020-11
影响因子：
6.1
通讯作者：
Yu Liu
中科院分区：
文献类型：
--
作者：
Jolanta Burda;Urs Klötzli;Beata Woskowicz-Ślęzak;Qiu-Li Li;Yu Liu
锆石U-Pb西姆斯定年结合背景（薄片）独居石和磷钇矿U + Th-总Pb定年用于阐明斯洛伐克Nízke Tatry山脉Chopok花岗岩的古生代演化。锆石、独居石和磷钇矿四个不同的年龄域证明了从岩浆形成到多阶段交代和热液叠加的漫长演化过程。对“冷”花岗岩年龄模式的地质解释需要特别注意，特别是对锆石继承和火成生长年龄的适当归属。这些问题可以解决使用锆石饱和温度（TZrn）作为锆石继承量的代理，结合TZrn与花岗岩固相线之间的温度差。在这方面，Chopok花岗岩是一种非典型的“冷”花岗岩。由于TZrn大大降低（约。锆石年龄数据表明，乔波克花岗岩是早奥陶世（475.8 ± 3.3Ma）岩浆事件的产物，与整个欧洲华力西带广泛记录的早古生代岩浆活动相对应。磷酸盐矿物年龄进一步证实了这一点。锆石U-Pb系统学和磷酸盐增生中记录的岩浆后活动与华力西造山带演化的不同阶段有关：早石炭世（约1000年）。352 Ma）交代记录了主要的华力西造山事件，而二叠纪-三叠纪年龄（约。255 Ma）反映了与大规模地壳伸展有关的热构造活动，与导致盘古大陆解体的初始大陆同期。
Zircon U-Pb SIMS dating combined with in-context (in thin section) monazite and xenotime U + Th-total Pb dating was used to clarify the Palaeozoic evolution of the ‘cold’ Chopok granite (Nízke Tatry Mountains, Slovakia). Four distinct zircon, monazite and xenotime age domains testify to a prolonged evolution from igneous formation to multi-stage metasomatism and hydrothermal overprinting. The geological interpretation of age patterns from ‘cold’ granites, expected to have low zircon saturation temperatures (<800 °C) and relatively high amounts of zircon inheritance, requires special care, especially for what concerns proper attribution of zircon inheritance and igneous growth ages. These issues can be resolved using zircon saturation temperatures (TZrn) as proxy for the amount of zircon inheritance in combination with the temperature differences between TZrnand the granite solidus. In this respect, the Chopok granite is an atypical ‘cold’ granite. Due to TZrnbeing substantially lower (ca. 80 °C ± 50 °C) than the granite solidus temperature, practically no zircon inheritance was found. The zircon age data indicates that the Chopok granite is a product of an Early Ordovician (475.8 ± 3.3 Ma) magmatic event, corresponding with the widespread Early Palaeozoic magmatism recorded throughout the European Variscan belt. This is further corroborated by phosphate mineral ages. The post-magmatic activity recorded in the U-Pb systematics of zircon and phosphates overgrowths can be related to the different phases of the evolution of the Variscan orogen: Early Carboniferous (ca. 352 Ma) metasomatism documents the main Variscan orogenic event, whereas the Permo-Triassic age (ca. 255 Ma) reflects thermo-tectonic activity associated with large-scale crustal extension, contemporaneous with the initial continental leading to the break-up of Pangea.
登录
查看更多内容
DOI：
10.2478/geoca-2013-0029
发表时间：
2013-12
期刊：
--
影响因子：
--
作者：
J. Burda;A. Gawęda;U. Klötzli
通讯作者：
J. Burda;A. Gawęda;U. Klötzli
影响因子：
2.3
作者：
A. Vozárová;Katarína Šarinová;A. Larionov;S. Presnyakov;S. Sergeev
通讯作者：
A. Vozárová;Katarína Šarinová;A. Larionov;S. Presnyakov;S. Sergeev
DOI：
--
发表时间：
2010
期刊：
--
影响因子：
--
作者：
D. Plašienka;P. Grecula;M. Kováč
通讯作者：
D. Plašienka;P. Grecula;M. Kováč
影响因子：
3.1
作者：
J. Pyle;F. Spear;D. Wark;C. Daniel;L. Storm
通讯作者：
J. Pyle;F. Spear;D. Wark;C. Daniel;L. Storm
影响因子：
2.9
作者：
G. Stampfli;C. Hochard;C. Vérard;C. Wilhem;J. vonRaumer
通讯作者：
G. Stampfli;C. Hochard;C. Vérard;C. Wilhem;J. vonRaumer