Comment on ’’Revealing the early geological history of the Istanbul Zone (Far-East Avalonia) through zircon U-Pb-Hf isotopic data’’ by Yılmazer et al. (2025), Precambrian research 427, 107855

IF 2.7 2区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Precambrian Research Pub Date : 2025-11-01 Epub Date: 2025-10-06 DOI:10.1016/j.precamres.2025.107939

Fatih Şen

{"title":"Comment on ’’Revealing the early geological history of the Istanbul Zone (Far-East Avalonia) through zircon U-Pb-Hf isotopic data’’ by Yılmazer et al. (2025), Precambrian research 427, 107855","authors":"Fatih Şen","doi":"10.1016/j.precamres.2025.107939","DOIUrl":null,"url":null,"abstract":"<div><div>Yılmazer et al. (2025) interpret a single detrital zircon U–Pb age of 530 ± 29 Ma from the Kurtköy Formation as evidence for an Upper Cambrian or younger depositional age. However, this interpretation merits re-evaluation in light of the relatively large analytical uncertainty (±5.5 %) and the absence of corroborating biostratigraphic or sedimentological evidence. Stratigraphic relationships and multiple well-defined zircon age populations (582 ± 5 Ma, 554 ± 8 Ma, and 544 ± 10 Ma) strongly support a Late Ediacaran depositional age. Additionally, the purported unconformable contact between the Kurtköy Formation and the underlying Yellice Volcanics is not supported by field observations, which instead suggest a tectonic boundary. Provenance data also indicate derivation from the nearby Yellice Arc rather than distant sources such as the Timanide Belt. An alternative interpretation of the depositional age and provenance of the Kurtköy Formation is proposed here, with broader implications for the tectono-stratigraphic evolution of the İstanbul Zone.</div></div>","PeriodicalId":49674,"journal":{"name":"Precambrian Research","volume":"430 ","pages":"Article 107939"},"PeriodicalIF":2.7000,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Precambrian Research","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0301926825002657","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/10/6 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Yılmazer et al. (2025) interpret a single detrital zircon U–Pb age of 530 ± 29 Ma from the Kurtköy Formation as evidence for an Upper Cambrian or younger depositional age. However, this interpretation merits re-evaluation in light of the relatively large analytical uncertainty (±5.5 %) and the absence of corroborating biostratigraphic or sedimentological evidence. Stratigraphic relationships and multiple well-defined zircon age populations (582 ± 5 Ma, 554 ± 8 Ma, and 544 ± 10 Ma) strongly support a Late Ediacaran depositional age. Additionally, the purported unconformable contact between the Kurtköy Formation and the underlying Yellice Volcanics is not supported by field observations, which instead suggest a tectonic boundary. Provenance data also indicate derivation from the nearby Yellice Arc rather than distant sources such as the Timanide Belt. An alternative interpretation of the depositional age and provenance of the Kurtköy Formation is proposed here, with broader implications for the tectono-stratigraphic evolution of the İstanbul Zone.

查看原文本刊更多论文

对Yılmazer et al.（2025）“利用锆石U-Pb-Hf同位素数据揭示伊斯坦堡带（远东阿瓦洛尼亚）早期地质历史”的评论，前寒武纪研究427,107855

Yılmazer等人（2025）将Kurtköy组的单个碎屑锆石U-Pb年龄（530±29 Ma）解释为上寒武纪或更年轻沉积时代的证据。然而，鉴于相对较大的分析不确定性（±5.5%）和缺乏确凿的生物地层学或沉积学证据，这种解释值得重新评估。地层关系和多个明确的锆石年龄群（582±5 Ma， 554±8 Ma和544±10 Ma）强烈支持晚埃迪卡拉世沉积时代。此外，所谓的Kurtköy组与下伏的黄利斯火山之间的不整合接触并没有得到现场观测的支持，而是表明存在构造边界。物源数据也表明它来自附近的黄里斯弧，而不是遥远的提曼尼德带。本文提出了对Kurtköy组沉积年龄和物源的另一种解释，对İstanbul带的构造地层演化具有更广泛的意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Precambrian Research 地学-地球科学综合

CiteScore

7.20

自引率

28.90%

发文量

325

审稿时长

12 months

期刊介绍： Precambrian Research publishes studies on all aspects of the early stages of the composition, structure and evolution of the Earth and its planetary neighbours. With a focus on process-oriented and comparative studies, it covers, but is not restricted to, subjects such as: (1) Chemical, biological, biochemical and cosmochemical evolution; the origin of life; the evolution of the oceans and atmosphere; the early fossil record; palaeobiology; (2) Geochronology and isotope and elemental geochemistry; (3) Precambrian mineral deposits; (4) Geophysical aspects of the early Earth and Precambrian terrains; (5) Nature, formation and evolution of the Precambrian lithosphere and mantle including magmatic, depositional, metamorphic and tectonic processes. In addition, the editors particularly welcome integrated process-oriented studies that involve a combination of the above fields and comparative studies that demonstrate the effect of Precambrian evolution on Phanerozoic earth system processes. Regional and localised studies of Precambrian phenomena are considered appropriate only when the detail and quality allow illustration of a wider process, or when significant gaps in basic knowledge of a particular area can be filled.