地中海东南部冷渗自生碳酸盐的赋存与成因

IF 1.9 3区 地球科学 Q1 GEOLOGY Depositional Record Pub Date : 2023-06-22 DOI:10.1002/dep2.239
R. Weidlich, O. M. Bialik, A. Rüggeberg, B. Grobéty, T. Vennemann, A. Neuman, Y. Makovsky, A. Foubert
{"title":"地中海东南部冷渗自生碳酸盐的赋存与成因","authors":"R. Weidlich,&nbsp;O. M. Bialik,&nbsp;A. Rüggeberg,&nbsp;B. Grobéty,&nbsp;T. Vennemann,&nbsp;A. Neuman,&nbsp;Y. Makovsky,&nbsp;A. Foubert","doi":"10.1002/dep2.239","DOIUrl":null,"url":null,"abstract":"<p>Methane-derived authigenic seep carbonates occur globally along continental margins. These carbonates are important archives to identify seep dynamics, the source of the ascending methane-enriched fluids together with their timing, and are an important carbon sequestration mechanism. Recently, seep carbonates were discovered in the Levant Basin in the south-eastern Mediterranean Sea. To elucidate past seepage activity and dynamics across the basin, different seep carbonate morphologies (chimneys, crusts and pavements) retrieved from the Levant Basin were mapped based on remotely operating vehicle data and analysed using standard sediment petrographic techniques, X-ray diffraction and stable carbon and oxygen isotope analyses. Carbonate chimneys consist of micrite (δ<sup>13</sup>C<sub>VPDB</sub> of −10‰ to +5‰) with dispersed baryte and dolomite crystals, fan-shaped aragonite (δ<sup>13</sup>C<sub>VPDB</sub> of −52‰ to −30‰) and high-magnesium calcite cements, with the latter often growing from low-magnesium calcite spherules. Botryoidal low-magnesium calcite cements are forming in small cavities. Carbonate crusts consist of micrite with low-magnesium calcite breccias, high-magnesium calcite nodules (δ<sup>13</sup>C<sub>VPDB</sub> of −35‰ to −20‰) and cements, and partially replaced fan-shaped aragonite cements. Carbonate pavements consist of low-magnesium calcite microsparite, micritic dolomite and high-magnesium calcite. Fan-shaped aragonite is locally present as pore-lining cement. Iron oxides are often seen coating the low-magnesium calcite, high-magnesium calcite and dolomite cements. Chimneys and crusts, characterised by high amounts of high-magnesium calcite and aragonite, are interpreted to have formed through advective methane fluxes. Pavements, with high quantities of dolomite, are explained as the product of diffusive methane flux. Sediment petrographic and geochemical analysis of the different carbonate morphologies and cement phases therein witness distinct modes of ascending fluid fluxes and their mixing with marine pore water and/or sea water during precipitation of the individual phases.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.239","citationCount":"0","resultStr":"{\"title\":\"Occurrence and Genesis of Cold-Seep Authigenic Carbonates from the South-Eastern Mediterranean Sea\",\"authors\":\"R. Weidlich,&nbsp;O. M. Bialik,&nbsp;A. Rüggeberg,&nbsp;B. Grobéty,&nbsp;T. Vennemann,&nbsp;A. Neuman,&nbsp;Y. Makovsky,&nbsp;A. Foubert\",\"doi\":\"10.1002/dep2.239\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Methane-derived authigenic seep carbonates occur globally along continental margins. These carbonates are important archives to identify seep dynamics, the source of the ascending methane-enriched fluids together with their timing, and are an important carbon sequestration mechanism. Recently, seep carbonates were discovered in the Levant Basin in the south-eastern Mediterranean Sea. To elucidate past seepage activity and dynamics across the basin, different seep carbonate morphologies (chimneys, crusts and pavements) retrieved from the Levant Basin were mapped based on remotely operating vehicle data and analysed using standard sediment petrographic techniques, X-ray diffraction and stable carbon and oxygen isotope analyses. Carbonate chimneys consist of micrite (δ<sup>13</sup>C<sub>VPDB</sub> of −10‰ to +5‰) with dispersed baryte and dolomite crystals, fan-shaped aragonite (δ<sup>13</sup>C<sub>VPDB</sub> of −52‰ to −30‰) and high-magnesium calcite cements, with the latter often growing from low-magnesium calcite spherules. Botryoidal low-magnesium calcite cements are forming in small cavities. Carbonate crusts consist of micrite with low-magnesium calcite breccias, high-magnesium calcite nodules (δ<sup>13</sup>C<sub>VPDB</sub> of −35‰ to −20‰) and cements, and partially replaced fan-shaped aragonite cements. Carbonate pavements consist of low-magnesium calcite microsparite, micritic dolomite and high-magnesium calcite. Fan-shaped aragonite is locally present as pore-lining cement. Iron oxides are often seen coating the low-magnesium calcite, high-magnesium calcite and dolomite cements. Chimneys and crusts, characterised by high amounts of high-magnesium calcite and aragonite, are interpreted to have formed through advective methane fluxes. Pavements, with high quantities of dolomite, are explained as the product of diffusive methane flux. Sediment petrographic and geochemical analysis of the different carbonate morphologies and cement phases therein witness distinct modes of ascending fluid fluxes and their mixing with marine pore water and/or sea water during precipitation of the individual phases.</p>\",\"PeriodicalId\":54144,\"journal\":{\"name\":\"Depositional Record\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2023-06-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.239\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Depositional Record\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/dep2.239\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Depositional Record","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/dep2.239","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOLOGY","Score":null,"Total":0}
引用次数: 0

摘要

甲烷衍生的自生渗碳酸盐岩分布在全球大陆边缘。这些碳酸盐岩是识别渗流动力学、富甲烷上升流体来源及其时间的重要档案,也是重要的固碳机制。最近,在地中海东南部黎凡特盆地发现了渗漏碳酸盐岩。为了阐明整个盆地过去的渗流活动和动力学,基于远程操作车辆数据,从黎凡特盆地提取了不同的渗透碳酸盐形态(烟囱、地壳和路面),并使用标准沉积物岩相学技术、x射线衍射和稳定碳氧同位素分析进行了分析。碳酸盐烟囱由泥晶(δ13CVPDB为- 10‰~ +5‰)、分散的重晶石和白云石晶体、扇形文石(δ13CVPDB为- 52‰~ - 30‰)和高镁方解石胶结物组成,后者通常由低镁方解石球粒生长而成。低镁方解石胶结物在小空腔中形成。碳酸盐岩结壳由泥晶、低镁方解石角砾岩、高镁方解石结核(δ13CVPDB为- 35‰~ - 20‰)和胶结物组成,部分取代了扇形文石胶结物。碳酸盐岩路面由低镁方解石、微晶白云石和高镁方解石组成。扇形文石局部以孔衬水泥形式存在。氧化铁常被包裹在低镁方解石、高镁方解石和白云石胶结物中。以大量高镁方解石和文石为特征的烟囱和地壳被解释为是通过平流甲烷通量形成的。含有大量白云石的路面被解释为扩散的甲烷通量的产物。对不同碳酸盐形态和胶结物相的沉积物岩相学和地球化学分析表明,在各个阶段的降水过程中,流体通量上升以及与海洋孔隙水和(或)海水混合的模式各不相同。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

摘要图片

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Occurrence and Genesis of Cold-Seep Authigenic Carbonates from the South-Eastern Mediterranean Sea

Methane-derived authigenic seep carbonates occur globally along continental margins. These carbonates are important archives to identify seep dynamics, the source of the ascending methane-enriched fluids together with their timing, and are an important carbon sequestration mechanism. Recently, seep carbonates were discovered in the Levant Basin in the south-eastern Mediterranean Sea. To elucidate past seepage activity and dynamics across the basin, different seep carbonate morphologies (chimneys, crusts and pavements) retrieved from the Levant Basin were mapped based on remotely operating vehicle data and analysed using standard sediment petrographic techniques, X-ray diffraction and stable carbon and oxygen isotope analyses. Carbonate chimneys consist of micrite (δ13CVPDB of −10‰ to +5‰) with dispersed baryte and dolomite crystals, fan-shaped aragonite (δ13CVPDB of −52‰ to −30‰) and high-magnesium calcite cements, with the latter often growing from low-magnesium calcite spherules. Botryoidal low-magnesium calcite cements are forming in small cavities. Carbonate crusts consist of micrite with low-magnesium calcite breccias, high-magnesium calcite nodules (δ13CVPDB of −35‰ to −20‰) and cements, and partially replaced fan-shaped aragonite cements. Carbonate pavements consist of low-magnesium calcite microsparite, micritic dolomite and high-magnesium calcite. Fan-shaped aragonite is locally present as pore-lining cement. Iron oxides are often seen coating the low-magnesium calcite, high-magnesium calcite and dolomite cements. Chimneys and crusts, characterised by high amounts of high-magnesium calcite and aragonite, are interpreted to have formed through advective methane fluxes. Pavements, with high quantities of dolomite, are explained as the product of diffusive methane flux. Sediment petrographic and geochemical analysis of the different carbonate morphologies and cement phases therein witness distinct modes of ascending fluid fluxes and their mixing with marine pore water and/or sea water during precipitation of the individual phases.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
CiteScore
4.10
自引率
16.70%
发文量
42
审稿时长
16 weeks
期刊最新文献
Issue Information The early–middle Cambrian siliciclastic tide-dominated succession in eastern Korea Preservation of groove mark striae formed by armoured mud clasts: The role of armour sediment size and bed yield stress Micritisation products in the inner ramp settings of the Abu Dhabi Lagoon Issue Information
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1