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Whiting events and the formation of aragonite in Mediterranean Karstic Marine Lakes: new evidence on its biologically induced inorganic origin

2009; Wiley; Volume: 57; Issue: 1 Linguagem: Inglês

10.1111/j.1365-3091.2009.01090.x

1365-3091

Ivan Sondi, MLADEN JURAČIĆ,

Groundwater and Isotope Geochemistry

SedimentologyVolume 57, Issue 1 p. 85-95 Whiting events and the formation of aragonite in Mediterranean Karstic Marine Lakes: new evidence on its biologically induced inorganic origin IVAN SONDI, IVAN SONDI Centre for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia (E-mail: [email protected])Search for more papers by this authorMLADEN JURAČIĆ, MLADEN JURAČIĆ Department of Geology, Faculty of Science, University of Zagreb, Zagreb, CroatiaSearch for more papers by this author IVAN SONDI, IVAN SONDI Centre for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia (E-mail: [email protected])Search for more papers by this authorMLADEN JURAČIĆ, MLADEN JURAČIĆ Department of Geology, Faculty of Science, University of Zagreb, Zagreb, CroatiaSearch for more papers by this author First published: 15 December 2009 https://doi.org/10.1111/j.1365-3091.2009.01090.xCitations: 43Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract This paper discusses the formation of whiting events, drifting milky clouds of water, and their role in the formation of recent aragonite sediments in a semi-enclosed, karstic, marine lake on the island of Mljet (Adriatic Sea). This study is based on detailed structural, morphological and sedimentological characterization of, and strontium distribution in, particles originating from suspended matter and sediments. The particles were examined by X-ray diffraction and electron diffraction analyses, scanning and transmission electron microscopy, as well as electron microprobe energy dispersive X-ray analyses and atomic absorption spectroscopy. Morphological features, granulometric characteristics, strontium enrichment and characteristic details of the aragonite structure in the needle-like particles were identical in both the suspended matter collected during whiting events and in the bottom sediments. The whiting events, which occasionally occurred in surface waters, were found to be sites of short-term active authigenic aragonite precipitation and the main source of fine-grained aragonite mud. This study exemplifies the role of biologically induced inorganic precipitation processes in the formation of recent aragonite mud in a restricted Mediterranean environment. References Benović, A., Lučić, D., Onofri, V., Peharda, M., Carić, M., Jasprica, N. and Bobanović-Ćolić, S. (2000) Ecological characteristics of the Mljet Island sea water lakes (South Adriatic Sea) with special reference to their resident populations of medusae. Sci. Mar. 64(Suppl. 1), 197–206. Boss, S.K. and Neumann, A.C. 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