Geochronologic age constraints on the Middle Devonian Hujiersite flora of Xinjiang, NW China

被引：11
|
作者：
Zheng, Daran [1 ,2 ]
Xu, Honghe [2 ]
Wang, Jun [1 ]
Feng, Chongqing [1 ]
Zhang, Haichun [2 ]
Chang, Su-Chin [1 ]
机构：
[1] Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China
[2] Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China
来源：
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY | 2016年 / 463卷
基金：
中国国家自然科学基金;
关键词：
Land plants; Zircon; Hujiersite Formation; Geochronology; Devonian; Xinjiang; U-PB; WEST JUNGGAR; NORTH XINJIANG; PALEOGEOGRAPHIC SIGNIFICANCE; LECLERCQIA-COMPLEXA; TECTONIC EVOLUTION; HASKINSIA GRIERSON; NEW-YORK; SP-NOV; ZIRCON;
D O I：
10.1016/j.palaeo.2016.10.015
中图分类号：
P9 [自然地理学];
学科分类号：
0705 ; 070501 ;
摘要：
The Hujiersite Formation of West Junggar, Xinjiang contain fossil plants that represent significant examples of Middle Devonian flora in North China. However, previous radio-isotopic age constraint for this fossil-rich formation is absent. The best-studied section of the Hujiersite flora occurs at a locality referred to as 251 Hill, which exposes numerous examples of fossil plants and information on depositional environment. In this study, we investigate the geological background of the 251 Hill section and collect two tuffaceous sandstone beds from a normal fault near the classic fossil outcrop. U-Pb ICP-MS analysis of detrital zircons from these samples gave a maximum depositional age of 385 Ma (Givetian stage) for the hanging wall and 380 Ma (early Frasnian stage) for the footwall of the upper Hujiersite Formation. This study thus reports a novel Givetian-early Frasnian age constraint for Hujiersite flora. This geochronologic constraint is consistent with previous age interpretations derived from biostratigraphic correlations. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：230 / 237
页数：8
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