气候变化领域集成服务门户(CCPortal): The relation of a coastal environment to early diagenetic clinoptilolite (zeolite) formation - New data from the Late Cretaceous European Basin

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DOI	10.1016/j.palaeo.2019.03.025
	The relation of a coastal environment to early diagenetic clinoptilolite (zeolite) formation - New data from the Late Cretaceous European Basin
	Jurkowska A.; Barski M.; Worobiec E.
发表日期	2019
ISSN	0031-0182
起始页码	166
结束页码	182
卷号	524
英文摘要	Clinoptilolite, an authigenic mineral of the zeolite group, is commonly considered as a product of rhyolitic volcanic glass transformation during diagenesis of carbonate pelagic/hemipelagic sediments of Cretaceous-Paleogene age. Another, subordinate way of clinoptilolite formation that has been suggested in the literature is its precipitation during diagenetic transformation of carbonate sediments enriched with biogenic silica. The observations concerning transformation of the latter into zeolite are scarce and mostly based on Cretaceous pelagic, hemipelagic and shallow marine deposits, and post-Cretaceous sediments in which there was no volcanic material. The mechanism of diagenetic clinoptilolite formation in volcanic-free sediments, as well as the role of the depositional setting in its precipitation, is not well understood. In carbonates of the NW part of the European Basin (west side of the Łysogóry-Dobrogea Archipelago) studied here, the clinoptilolite is associated with opal-CT (from the dissolution of sponge spicules) and a detrital clays are documented for the first time in a Cretaceous coastal environment. The carbonates were deposited in a coastal environment which was under the influence of weak currents delivering sponge spicules (biogenic opal) from the offshore zone and the terrestrial input was transported by rivers from a neighboring island. The lush plant vegetation, with numerous pteridophytes and conifers, within a warm (sub-tropical or tropical) and humid climate enhanced the terrestrial weathering of clays and feldspars. This unique combination of elevated silica concentrations (from sponge spicules dissolution) and aluminum availability (from terrestrial weathering of feldspars in a subtropical climate) during the early diagenesis combined with alkalinity triggered by organic matter decomposition, enhanced the clinoptilolite formation a few centimeters below the seabed. The investigation demonstrates a novel route by which pore-fluids enriched with silica and aluminum initiate clinoptilolite formation during the very early stage of diagenesis, a few centimeters below the seafloor. The clinoptilolite distribution in Late Cretaceous silica rich deposits (with no volcanic input) of the European Basin is always associated with opal-CT, from sponge spicules and elevated terrestrial input (clays). Taking into account the distinctive Campanian-Maastrichtian sedimentation in the epicontinental European Basin, composed almost exclusively of pure pelagic carbonates, the depositional settings in which the silica and aluminum were available in pore waters was restricted to the part of the basin influenced by terrestrial input. This leads to the conclusion that clinoptilolite formation in volcanic-free sediment is an indicator of not only enhanced sponge silica availability but also the close proximity of the source area. © 2019 Elsevier B.V.
语种	英语
scopus关键词	authigenic mineral; Campanian; carbonate sediment; clinoptilolite; coastal zone; Cretaceous; Cretaceous-Paleogene boundary; depositional environment; diagenesis; Maastrichtian; offshore application; porewater; rhyolite; seafloor; sedimentation; silica; volcanic glass; Dobrogea; Lysogory; Poland [Central Europe]; Romania; Swietokrzyskie; Swietokrzyskie Mountains; Coniferophyta; Pteridophyta
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/150972
作者单位	AGH University of Science and Technology in Kraków, Faculty of Geology, Geophysics and Environmental Protection, Mickiewicza St., 30, Kraków, 30-059, Poland; University of Warsaw, Faculty of Geology, 93 Żwirki i Wigury St., Warszawa, 02-089, Poland; W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46 St., Kraków, 31-512, Poland
推荐引用方式 GB/T 7714	Jurkowska A.,Barski M.,Worobiec E.. The relation of a coastal environment to early diagenetic clinoptilolite (zeolite) formation - New data from the Late Cretaceous European Basin[J],2019,524.
APA	Jurkowska A.,Barski M.,&Worobiec E..(2019).The relation of a coastal environment to early diagenetic clinoptilolite (zeolite) formation - New data from the Late Cretaceous European Basin.Palaeogeography, Palaeoclimatology, Palaeoecology,524.
MLA	Jurkowska A.,et al."The relation of a coastal environment to early diagenetic clinoptilolite (zeolite) formation - New data from the Late Cretaceous European Basin".Palaeogeography, Palaeoclimatology, Palaeoecology 524(2019).