气候变化领域集成服务门户(CCPortal): Armoured sponge spicules from Panarea Island (Italy): Implications for their fossil preservation

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DOI	10.1016/j.palaeo.2019.109379
	Armoured sponge spicules from Panarea Island (Italy): Implications for their fossil preservation
	Ferretti A.; Messori F.; Di Bella M.; Sabatino G.; Quartieri S.; Cavalazzi B.; Italiano F.; Barbieri R.
发表日期	2019
ISSN	0031-0182
卷号	536
英文摘要	A variety of calcareous and siliceous skeletal components are associated with exceptional, still active deposits of modern iron ooids off Panarea, one of the volcanic islands of the Aeolian Arc (Tyrrhenian Sea, Italy). Both ooids and skeletal components occur as loose sediments influenced by submarine hydrothermal fluid vents. Whereas iron ooids are exclusively made of goethite laminae primarily nucleated on volcaniclastic material, sponge spicules – that represent most of the siliceous skeletal component – develop laminated coatings (concretions) of varying sizes. This partial or total coating consists of regularly banded Fe‒rich layers exhibiting the same textural features and mineralogical composition (goethite) of the ooid cortex developed around inorganic cores. Spicules did not reveal any obvious attaching structure or interfingering with the surrounding coating and did not undergo bioerosion or any other evidence of biological intervention during their development. A hydrothermal origin, compatible with the general setting, is therefore proposed for these armoured sponge spicules. We believe that this unique modern case of iron concretions produced on siliceous spicules can contribute to explain other known fossil cases as well as to understand the taphonomy of this type of biogenic silica that seems rarely to have been preserved in such an extreme habitat. © 2019 Elsevier B.V.
英文关键词	Coated grain; Goethite; Iron ooids; Ironstones; Recent; Sicily
语种	英语
scopus关键词	bioerosion; coating; goethite; hydrothermal fluid; ironstone; ooid; preservation; silica; sponge; taphonomy; Aeolian Arc; Italy; Lipari Islands; Mediterranean Sea; Messina [Sicily]; Panarea; Sicily; Tyrrhenian Sea
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/150763
作者单位	Dipartimento di Scienze Chimiche e Geologiche (DSCG), Università degli Studi di Modena e Reggio Emilia, Via Campi 103, Modena, 41125, Italy; Department of Earth Sciences, University of Geneva, Rue des Maraîchers 13, Geneva, 1205, Switzerland; Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione di Palermo, Via Ugo La Malfa 153, Palermo, 90146, Italy; Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra (MIFT), Università degli Studi di Messina, Viale Ferdinando Stagno D'Alcontres 31, S. Agata, Messina, 98166, Italy; Dipartimento di Scienze Biologiche, Geologiche e Ambientali (BiGeA), Alma Mater Studiorum-Università di Bologna, Università di Bologna, Via Zamboni 67, Bologna, 40126, Italy; Department of Geology, University of Johannesburg, PO Box 524, Auckland Park, Johannesburg, 2006, South Africa
推荐引用方式 GB/T 7714	Ferretti A.,Messori F.,Di Bella M.,et al. Armoured sponge spicules from Panarea Island (Italy): Implications for their fossil preservation[J],2019,536.
APA	Ferretti A..,Messori F..,Di Bella M..,Sabatino G..,Quartieri S..,...&Barbieri R..(2019).Armoured sponge spicules from Panarea Island (Italy): Implications for their fossil preservation.Palaeogeography, Palaeoclimatology, Palaeoecology,536.
MLA	Ferretti A.,et al."Armoured sponge spicules from Panarea Island (Italy): Implications for their fossil preservation".Palaeogeography, Palaeoclimatology, Palaeoecology 536(2019).