气候变化领域集成服务门户(CCPortal): Upper Triassic shallow–water carbonates from the Naizawa Accretionary Complex; Hokkaido (Japan): New insights from Panthalassa

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DOI	10.1016/j.palaeo.2020.109832
	Upper Triassic shallow–water carbonates from the Naizawa Accretionary Complex; Hokkaido (Japan): New insights from Panthalassa
	Peyrotty G.; Ueda H.; Peybernes C.; Rettori R.; Martini R.
发表日期	2020
ISSN	0031-0182
卷号	554
英文摘要	Due to their accretion on the Circum–Pacific area during the Jurassic and the Cretaceous, Upper Triassic carbonates from the Panthalassa occur very scarcely and with relatively poor preservation in accretionary complexes. However, they represent a unique opportunity to improve our knowledge of the depositional conditions in tropical regions of the Panthalassa. Recognized as a cradle of life, shallow–water carbonates are also of great importance to understand of how life evolved out of the Tethyan domain during the Triassic. Since 2007, several sedimentological and biostratigraphic studies, focused on the Upper Triassic shallow water limestone from the Circum–Pacific area, have been carried out as part of the REEFCADE project at the University of Geneva. Carbonates were thus reported in the southern part of Japan and in the Russian Far East. Hokkaido Island, in northern Japan, represents the missing link between those two areas. To fill this gap, five limestone outcrops, so far poorly described in the literature, were identified and sampled in the Pippu and Esashi areas (central and northern part of Hokkaido Island, respectively). Their related microfacies are presented in detail as well as their foraminiferal associations. The obtained age, based on foraminiferal biostratigraphy from both areas, is defined as Carnian and the facies similarities, associated with specific modes of occurrence, identify the outcrops from the two areas as part of the same depositional system. Based on microfacies interpretations, a hypothetical depositional model is presented. It corresponds to a intra–oceanic depositional system developed on the flanks of an emergent volcanic seamount. The strong similarity with synchronous systems from the Sambosan Accretionary Complex (southwestern Japan) is discussed. © 2020 The Authors
英文关键词	Benthic foraminifers; Biostratigraphy; Limestone; Microfacies; Sedimentology
语种	英语
scopus关键词	accretion; biostratigraphy; carbonate; Carnian; Cretaceous; depositional environment; foraminifera; Jurassic; microfacies; outcrop; outcrossing; shallow water; Esashi; Hokkaido; Japan; Russian Far East; Russian Federation; Foraminifera
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150439
作者单位	Department of Earth Sciences, University of Geneva, Rue des Maraîchers 13, Genève, CH–1205, Switzerland; Department of Earth and Environmental Sciences, Hirosaki University, 3 Bunkyo–cho, Hirosaki, Amori 036–8561, Japan; Dipartimento di Fisica e Geologia, University of Perugia, Via Pascoli, Perugia, 06123, Italy
推荐引用方式 GB/T 7714	Peyrotty G.,Ueda H.,Peybernes C.,等. Upper Triassic shallow–water carbonates from the Naizawa Accretionary Complex; Hokkaido (Japan): New insights from Panthalassa[J],2020,554.
APA	Peyrotty G.,Ueda H.,Peybernes C.,Rettori R.,&Martini R..(2020).Upper Triassic shallow–water carbonates from the Naizawa Accretionary Complex; Hokkaido (Japan): New insights from Panthalassa.Palaeogeography, Palaeoclimatology, Palaeoecology,554.
MLA	Peyrotty G.,et al."Upper Triassic shallow–water carbonates from the Naizawa Accretionary Complex; Hokkaido (Japan): New insights from Panthalassa".Palaeogeography, Palaeoclimatology, Palaeoecology 554(2020).