气候变化领域集成服务门户(CCPortal): From arc evolution to arc-continent collision: Late Cretaceous-middle Eocene geology of the Eastern Pontides, northeastern Turkey

CCPortal

DOI	10.1130/B31913.1
	From arc evolution to arc-continent collision: Late Cretaceous-middle Eocene geology of the Eastern Pontides, northeastern Turkey
	Kandemir Ö.; Akbayram K.; Çobankaya M.; Kanar F.; Pehlivan Ş.; Tok T.; Hakyemez A.; Ekmekçi E.; Danaci F.; Temiz U.
发表日期	2019
ISSN	167606
起始页码	1889
结束页码	1906
卷号	131 期号:2021-11-12
英文摘要	The Eastern Pontide Arc, a major fossil submarine arc of the world, was formed by northward subduction of the northern Neo-Tethys lithosphere under the Eurasian margin. The arc's volcano-sedimentary sequence and its cover contain abundant fossils. Our new systematical paleontological and structural data suggest the Late Cretaceous arc volcanism was initiated at early-middle Turonian and continued uninterruptedly until the end of the early Maastrichtian, in the northern part of the Eastern Pontides. We measured ~5500-m-thick arc deposits, suggesting a deposition rate of ~220 m Ma-1 in ~25 m.y. We have also defined four different chemical volcanic episodes: (1) an early-middle Turonian-Santonian mafic-intermediate episode, (2) a Santonian acidic episode; when the main volcanic centers were formed as huge acidic domes-calderas comprising the volcanogenic massive sulfide ores, (3) a late Santonian-late Campanian mafic-intermediate episode, and (4) a late Campanian-early Maastrichtian acidic episode. The volcaniclastic rocks were deposited in a deepwater extensional basin until the late Campanian. Between late Campanian and early Maastrichtian, intra-arc extension resulted in opening of back-arc in the north, while the southern part of the arc remained active and uplifted. The back-arc basin was most probably connected to the Eastern Black Sea Basin. In the back-arc basin, early Maastrichtian volcano-sedimentary arc sequence was transitionally overlain by pelagic sediments until late Danian suggesting continuous deep-marine conditions. However, the subsidence of the uplifted-arc-region did not occur until late Maastrichtian. We have documented a Selandian-early Thanetian (57-60 Ma) regional hiatus defining the closure age of the Izmir-Ankara-Erzincan Ocean along the Eastern Pontides. Between late Thanetian and late Lutetian synorogenic turbidites and postcollisional volcanics were deposited. The Eastern Pontide fold-and-thrust belt started to form at early Eocene (ca. 55 Ma) and thrusting continued in the post-Lutetian times. © 2019 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184949
作者单位	General Directorate of Mineral Research and Exploration (MTA), Department of Geological Research, çankaya, Ankara, TR-06800, Turkey; Bingöl University, Centre for Energy, The Environment and Natural Disasters and Faculty of Engineering and Architecture, Department of Civil Engineering, Bingöl, TR-12000, Turkey; General Directorate of Mineral Research and Exploration (MTA), Regional Directorate of Black Sea, Pelitli, Trabzon, TR-61010, Turkey; Bozok University, Faculty of Engineering and Architecture, Department of Geological Engineering, Yozgat, TR-66100, Turkey
推荐引用方式 GB/T 7714	Kandemir Ö.,Akbayram K.,Çobankaya M.,et al. From arc evolution to arc-continent collision: Late Cretaceous-middle Eocene geology of the Eastern Pontides, northeastern Turkey[J],2019,131(2021-11-12).
APA	Kandemir Ö..,Akbayram K..,Çobankaya M..,Kanar F..,Pehlivan Ş..,...&Temiz U..(2019).From arc evolution to arc-continent collision: Late Cretaceous-middle Eocene geology of the Eastern Pontides, northeastern Turkey.Bulletin of the Geological Society of America,131(2021-11-12).
MLA	Kandemir Ö.,et al."From arc evolution to arc-continent collision: Late Cretaceous-middle Eocene geology of the Eastern Pontides, northeastern Turkey".Bulletin of the Geological Society of America 131.2021-11-12(2019).