Incorporation of trace elements in aragonite skeletons of South East Mediterranean vermetids

IF 3.1 3区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS Applied Geochemistry Pub Date : 2023-08-01 DOI:10.1016/j.apgeochem.2023.105720

Y. Jacobson

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引用次数: 0

Abstract

The Mediterranean Sea is a unique archive of past climatology, as this region is sensitive to both global climate fluctuations and manmade disturbances. Our understanding of these processes is however, limited, due to the absence of high-resolution multi-element proxies in this region. Here, I present the first high-resolution record of trace-elements (TE) in Mediterranean aragonite veremtid reefs, spanning the last millennium. Modern vermetid TE contents are mostly in agreement with other marine biogenic aragonites, reinforcing the potential use of veremtid reefs as paleo-environmental proxies. The down-core U/Ca and Sr/Ca fluctuations resemble the main climatic events of the last millennium, potentially linked to changes in sea surface temperature (SST). Pb and Cd records are associated with anthropogenic pollution and demonstrate trends related to growing industrial activity in the Anthropocene. Carbonate records of Al, Fe and Rb are attested as potential proxies to infer terrestrial inputs. Fe/Ca is used to decouple dust from riverine sources, while Rb/Ca is proposed for differentiation between sources of dust. The sub-millennial multi-element study enables the observation of independent environmental patterns within a single archive, and the decoupling of anthropogenic imprint from natural variability.

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地中海东南部vermetids霰石骨架中微量元素的掺入

地中海是一个独特的过去气候学档案，因为该地区对全球气候波动和人为干扰都很敏感。然而，由于该地区缺乏高分辨率的多元素代理，我们对这些过程的理解有限。在这里，我展示了地中海文石蛭状珊瑚礁中痕量元素(TE)的第一个高分辨率记录，跨越了过去的千年。现代蚓状礁TE含量与其他海洋生物文石基本一致，增强了蚓状礁作为古环境代用指标的潜力。下核U/Ca和Sr/Ca波动类似于上一千年的主要气候事件，可能与海表温度(SST)的变化有关。铅和镉记录与人为污染有关，并显示了与人类世日益增长的工业活动有关的趋势。碳酸盐中Al、Fe和Rb的记录被证明是推断陆源输入的潜在代用物。Fe/Ca用于分离河流来源的粉尘，而Rb/Ca用于区分粉尘来源。次千年的多要素研究能够在单个档案中观察到独立的环境模式，并将人为印记与自然变率解耦。

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来源期刊

Applied Geochemistry 地学-地球化学与地球物理

CiteScore

6.10

自引率

8.80%

发文量

272

审稿时长

65 days

期刊介绍： Applied Geochemistry is an international journal devoted to publication of original research papers, rapid research communications and selected review papers in geochemistry and urban geochemistry which have some practical application to an aspect of human endeavour, such as the preservation of the environment, health, waste disposal and the search for resources. Papers on applications of inorganic, organic and isotope geochemistry and geochemical processes are therefore welcome provided they meet the main criterion. Spatial and temporal monitoring case studies are only of interest to our international readership if they present new ideas of broad application. Topics covered include: (1) Environmental geochemistry (including natural and anthropogenic aspects, and protection and remediation strategies); (2) Hydrogeochemistry (surface and groundwater); (3) Medical (urban) geochemistry; (4) The search for energy resources (in particular unconventional oil and gas or emerging metal resources); (5) Energy exploitation (in particular geothermal energy and CCS); (6) Upgrading of energy and mineral resources where there is a direct geochemical application; and (7) Waste disposal, including nuclear waste disposal.