Constraining past environmental changes of cold‐water coral mounds with geochemical proxies in corals and foraminifera. (5th December 2019)

• Record Type: Journal Article
• Authors: Raddatz, Jacek; Rüggeberg, Andres
• Is Part Of: Depositional record. Volume 7:Number 2(2021)
• Page Start: 200
• Page End: 222
• Publication Date: 2019-12-05
• Subjects: Carbonate mounds -- cold‐water corals -- deep‐sea -- Desmophyllum pertusum -- intermediate water masses -- palaeoceanography; Sediments (Geology) -- Periodicals; Sedimentology -- Periodicals; Sedimentation and deposition -- Periodicals; 552.5
• DOI: 10.1002/dep2.98
• Languages: English
• ISSNs: 2055-4877

Abstract

Abstract: Cold‐water coral (CWC) reefs and mounds are and have been biodiversity hotspots of the deep sea. As their occurrence depends on specific environmental parameters, gaining hindsight on changing ocean conditions under on‐going climate change is the key to a better understanding of CWC mound development through time. A convenient technique for reconstructing the palaeoenvironment during periods of CWC mound growth is by extracting geochemical proxies from biologically mediated carbonates. Here, the focus is on probably the two most abundant calcareous archives, that are, cold‐water Scleractinia and Foraminifera, with an overview of the geochemical proxies (selection) used in these aragonitic and calcitic skeletons from CWC mounds. A particular emphasis is set on constraining proxies for temperature, salinity, seawater density, seawater carbonate systems parameters (pH, CO3 2− ), nutrients, oxygen and water mass tracers. Abstract : A review on state of the art of geochemical proxies in calcareous organisms from cold‐water coral mounds. What can we reconstruct and how? This review highlights potentials and pitfalls of various geochemical methods.