DOI: 10.1007/s00531-016-1307-2
Scopus记录号: 2-s2.0-84960102465
论文题名: U–Pb zircon and biostratigraphic data of high-pressure/low-temperature metamorphic rocks of the Talea Ori: tracking the Paleotethys suture in central Crete, Greece
作者: Zulauf G. ; Dörr W. ; Krahl J. ; Lahaye Y. ; Chatzaras V. ; Xypolias P.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2016
卷: 105, 期: 7 起始页码: 1901
结束页码: 1922
语种: 英语
英文关键词: Achlada Beds
; External Hellenides
; Paleotethys suture
; Rogdia Beds
; Talea Ori
; Vasilikon marble
Scopus关键词: biostratigraphy
; Cambrian
; marble
; metamorphic rock
; Proterozoic
; source rock
; suture zone
; uranium-lead dating
; zircon
; Aegean Islands
; Crete [Greece]
; Greece
; Hellenides
; Foraminifera
英文摘要:
Inherited deformation microfabrics of detrital quartz grains and U–Pb (Laser ablation (LA)-ICPMS and ID TIMS) ages of detrital zircons separated from the Phyllite–Quartzite Unit s.l. of the Talea Ori, central Crete, suggest strikingly different source rocks. Albite gneiss of the lower Rogdia Beds includes Cambrian and Neoproterozoic rounded zircons with main U–Pb age peaks at 628 and 988 Ma. These and minor Paleoproterozoic and Archean peaks, together with the lack of Variscan-aged and Mesoproterozoic zircons, are similar to the age spectra obtained from the Phyllite–Quartzite Unit s.str. of the Peloponnesus and eastern Crete and from the Taurides. All of these zircons should be derived from the northeastern passive margin of Gondwana (Cimmeria). Metatuffites of the uppermost Rogdia Beds and metasandstone of Bali beach, on the other hand, include euhedral detrital zircons displaying a Variscan U–Pb age spectra at ca. 300 Ma with concordia ages at 291 ± 3, 300 ± 1 Ma (Rogdia) and 286 ± 3, 300 ± 3, 313 ± 2 Ma (Bali). Both types of metasediments and their zircons are similar to those of the pre-Alpine basement and overlying Tyros Beds of eastern Crete, revealing a provenance at the southern active margin of Laurasia. Thus, in central Crete the Paleotethys suture should be situated inside the Rogdia Beds. Magmatic zircons separated from a rhyolite boulder of the lower Achlada Beds yielded a concordant U–Pb zircon age at 242 ± 2 Ma placing a maximum age for the deposition of the (meta)conglomerate from which the boulder was collected. This age is compatible with an Olenekian-early Anisian age of the underlying Vasilikon marble suggested by new findings of the foraminifera Meandrospira aff. pusilla. Both the Achlada Beds and the Vasilikon marble can be attributed to the lower Tyros Beds of eastern Crete. The Alpine deformation led to a pervasive mylonitic foliation, which is affecting most of the studied rocks. This foliation results from D2 top-to-the-north shearing, which post-dates the growth of blue amphiboles (crossite). © 2016, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960102465&doi=10.1007%2fs00531-016-1307-2&partnerID=40&md5=74645f087203930d073ab61b1acec758
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70121
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Institut für Geowissenschaften, Universität Frankfurt a.M., Altenhöferallee 1, Frankfurt am Main, Germany; Agnesstraße 45, Munich, Germany; Geological Survey of Finland, P.O. Box 96, Espoo, Finland; Department of Geoscience, University of Wisconsin-Madison, Madison, WI, United States; Department of Earth Sciences, Utrecht University, PO Box 80.021, Utrecht, Netherlands; Department of Geology, University of Patras, Patras, Greece
Recommended Citation:
Zulauf G.,Dörr W.,Krahl J.,et al. U–Pb zircon and biostratigraphic data of high-pressure/low-temperature metamorphic rocks of the Talea Ori: tracking the Paleotethys suture in central Crete, Greece[J]. International Journal of Earth Sciences,2016-01-01,105(7)