气候变化领域集成服务门户(CCPortal): Interplay between biotic and environmental conditions in pre-salt Messinian microbialites of the western Mediterranean (Upper Miocene; Mallorca; Spain)

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DOI	10.1016/j.palaeo.2019.109242
	Interplay between biotic and environmental conditions in pre-salt Messinian microbialites of the western Mediterranean (Upper Miocene; Mallorca; Spain)
	Suarez-Gonzalez P.; Arenas C.; Benito M.I.; Pomar L.
发表日期	2019
ISSN	0031-0182
卷号	533
英文摘要	Microbial buildups that predate the Messinian salinity crisis, including one of the few Phanerozoic examples of ‘giant’ microbialites, crop out upon the island of Mallorca (W Mediterranean). Sedimentological and geochemical data from microbialites and associated deposits, both essentially dolomitic, indicate that they grew in shallow marine conditions but relatively restricted from the open marine realm. Two microbialite-bearing sequences occur, both consisting of subtidal to supratidal deposits. Periods of restriction led to evaporative and hypersaline conditions that favored the development of microbialites and local precipitation of sulfates. By contrast, ephemeral periods marked by more open conditions were devoid of microbialites and allowed production of bioclastic deposits. Microbialites range from decameter- to decimeter-scale, reflecting differences in accommodation space. Despite contrasting sizes, all microbialite bodies record similar mesostructure evolution through time, from thrombolites to stromatolites, with a sharp transition between these endmembers. The change from subtidal to shallower, more restricted and saline intertidal environments triggered biotic substitution of thrombolite-generating microbial communities to stromatolite-generating ones. Furthermore, a wide variety of microstructures, from agglutinated to micritic with fossilized microbes, indicates that two main accretion processes occurred: microbially-influenced primary dolomite precipitation and grain trapping and binding, which were controlled by the interaction between microbes and changes in environmental conditions (e.g. grain supply, hydrodynamics and hydrochemistry). Therefore, the diversity of macro-, meso- and microstructures of these microbialites was caused by a complex interplay between depositional, biotic and hydrological parameters, which offers useful insights for the palaeoecological interpretation of other examples, at any scale and throughout geological time. © 2019 Elsevier B.V.
英文关键词	Geochemistry; Marine evaporative environments; Primary dolomite; Sedimentology; Stromatolites; Thrombolites
语种	英语
scopus关键词	biotic factor; dolomite; environmental conditions; geochemistry; marine environment; Messinian; microbial community; microbialite; Miocene; paleoecology; salinity; sedimentology; stromatolite; thrombolite; Balearic Islands; Majorca; Mediterranean Sea; Mediterranean Sea (West); Spain
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/150827
作者单位	Área de Geología, Universidad Rey Juan Carlos, c/ Tulipán s/n 28933, Móstoles, Spain; Dpto. de Ciencias de la Tierra, Facultad de Ciencias, Instituto Universitario de Investigación en Ciencias Ambientales de Aragón (IUCA) and Geotransfer Group, Universidad de Zaragoza, c/ Pedro Cerbuna, 12, Zaragoza, 50009, Spain; Dpto. de Geodinámica, Estratigrafía y Paleontología, Facultad de Ciencias Geológicas, IGEO (CSIC - Universidad Complutense de Madrid), c/ José Antonio Novais, 12, Madrid, 28040, Spain; Cátedra Guillem Colom, Universitat de les Illes Balears, ctra. Valldemossa, Palma de Mallorca, Spain
推荐引用方式 GB/T 7714	Suarez-Gonzalez P.,Arenas C.,Benito M.I.,et al. Interplay between biotic and environmental conditions in pre-salt Messinian microbialites of the western Mediterranean (Upper Miocene; Mallorca; Spain)[J],2019,533.
APA	Suarez-Gonzalez P.,Arenas C.,Benito M.I.,&Pomar L..(2019).Interplay between biotic and environmental conditions in pre-salt Messinian microbialites of the western Mediterranean (Upper Miocene; Mallorca; Spain).Palaeogeography, Palaeoclimatology, Palaeoecology,533.
MLA	Suarez-Gonzalez P.,et al."Interplay between biotic and environmental conditions in pre-salt Messinian microbialites of the western Mediterranean (Upper Miocene; Mallorca; Spain)".Palaeogeography, Palaeoclimatology, Palaeoecology 533(2019).