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DOI	10.1016/j.earscirev.2021.103532
	On the settling of marine carbonate grains: Review and challenges
	de Kruijf M.; Slootman A.; de Boer R.A.; Reijmer J.J.G.
发表日期	2021
ISSN	0012-8376
卷号	217
英文摘要	Particle settling velocity is a fundamental parameter in sedimentology and engineering, and has accordingly received much attention in the literature. Grain properties, such as shape and drag coefficient, which affect terminal settling velocity, also control the threshold of initiation of motion and sediment entrainment into suspension. Terminal settling velocity therefore provides insights into sediment dynamics in modern and past depositional environments and is important for marine engineering works. Despite the global importance of resedimented carbonates the study of particle hydrodynamics is strongly biased towards terrigenous sediments. This paper presents a review of the settling hydrodynamics of carbonate grains and associated particle properties, such as shape, grain size and density. For carbonate grains these parameters are more complex than for siliciclastic counterparts due to their common biogenic origin, introducing a wide range of morphologies, densities and abrasion products as a result of the skeletal nature of such grains. This review includes an extensive database of published composition-specific settling velocities, as well as densities of common carbonate constituents. The database includes corals, coralline red algae, bivalves, brachiopods, gastropods, Halimeda green algae, bryozoans, crinoids, echinoderms, Alcyonarian spicules, numerous benthic and planktic foraminifers, and fecal pellets. Grain density as a function of skeletal structure and mineralogy exerts another control on settling velocity, with unclarity in density definitions hampering effective communication in the literature. The variation in single-grain hydrodynamic behaviour implies careful application of previously proposed equations for the prediction of settling velocity of bulk sand. Despite a firm basis there is a need for additional systematic composition-specific investigations to enable the adequate prediction of carbonate particle hydrodynamics due to the broad spectrum of forms and densities. Emerging technologies such as automated particle velocimetry, computational fluid dynamics, machine learning and microtomography provide exciting avenues for future understanding of the hydrodynamic behaviour of particles with the complexity of natural carbonate grains. © 2021 Elsevier B.V.
英文关键词	Bioclasts; Carbonate; Density; Hydrodynamic behaviour; Particle shape; Settling velocity
语种	英语
scopus关键词	bioclastic sediment; carbonate; density; hydrodynamics; marine sediment; particulate matter; settling velocity; shape; Anthozoa; Bivalvia; Brachiopoda; Bryozoa; Chlorophyta; Echinodermata; Foraminifera; Gastropoda; Halimeda; Pelmatozoa; Rhodophyta
来源期刊	EARTH-SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/209305
作者单位	Vrije Universiteit Amsterdam, Faculty of Earth and Life Sciences, Department of Earth Sciences, Sedimentology and Marine Geology Group, De Boelelaan 1085, Amsterdam, 1081 HV, Netherlands; College of Petroleum Engineering & Geosciences, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
推荐引用方式 GB/T 7714	de Kruijf M.,Slootman A.,de Boer R.A.,et al. On the settling of marine carbonate grains: Review and challenges[J],2021,217.
APA	de Kruijf M.,Slootman A.,de Boer R.A.,&Reijmer J.J.G..(2021).On the settling of marine carbonate grains: Review and challenges.EARTH-SCIENCE REVIEWS,217.
MLA	de Kruijf M.,et al."On the settling of marine carbonate grains: Review and challenges".EARTH-SCIENCE REVIEWS 217(2021).