南海北部冷泉碳酸盐岩的矿物、岩石及地球化学研究进展
Progresses on petrology, mineralogy and geochemistry of cold seep carbonates in the northern South China Sea
查看参考文献69篇
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文摘
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南海北部陆坡海底冷泉碳酸盐岩广泛发育,已从30个站位采集到冷泉碳酸盐岩。南海北部冷泉碳酸盐岩呈结壳状、结核状、烟囱状、角砾状、块状等,主要自生矿物有文石和方解石,部分站位样品有白云石和铁白云石及少量菱铁矿。冷泉碳酸盐岩具有较轻的碳同位素组成特征,西沙海槽海域、神狐海域、东沙西南海域、东沙东北海域和台西南海域碳酸盐岩的δ~(13)CPDB分别为-29.6‰—-13.3‰(平均-21.0‰),-40.4‰—-38.7‰(平均-39.8‰),-36.1‰—-18.2‰(平均-26.8‰),-61.4‰—-32.8‰(平均-49.3‰)和-57.6‰—-35.7‰(平均-48.3‰),显示了较大的变化范围,反映了复杂的碳源。冷泉碳酸盐岩的δ~(18)OPDB为0.4‰—7.5‰,同样显示了较大的变化范围,反映可能与富集~(18)O的地层水和/或天然气水合物分解水有关。神狐海域及东沙东北部九龙甲烷礁海域冷泉碳酸盐岩的稀土元素页岩标准化配分模式既具有Ce正异常,同时也有Ce负异常特征,说明冷泉碳酸盐岩形成过程中可能存在氧化还原条件的变化。南海北部陆坡不同海域,甚至同一站位的冷泉碳酸盐岩均表现出不同的矿物、同位素及元素组成特征,可能反映了冷泉渗漏流体和天然气水合物稳定状态的差异。 |
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其他语种文摘
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Cold seep carbonates are known to be commonly developed in the northern South China Sea. Authigenic carbonate samples were collected from thirty sites in the region. These carbonates consist of concretions, nodules, chimneys, fragments or massive blocks. Mineralogically, the carbonates are dominated by aragonite and Mg calcite. However, a certain amount of dolomites are present in some samples. The carbon isotopic compositions (δ~(13)CPDB) of the carbonates range from -29.6‰ to -13.3‰ in the Xisha samples, from -40.4‰ to -38.7‰ in the Shenhu samples, from -36.1‰ to -18.2‰ in the southwestern Dongsha samples, from -61.4‰ to -32.8‰ in the northeastern Dongsha samples, and from -57.6‰ to -35.7‰ in the southwestern Taiwan samples. The variable δ~(13)C values indicate complex carbon sources that include 13C-depleted biogenic and thermogenic methane. A similarly large variability in δ~(18)OPDB values (0.4‰ to 7.5‰) demonstrates 18 O-enriched fluids possibly associated with dissociation of locally abundant gas hydrate. The shale-normalized REE (rare earth element) patterns of the carbonates from Jiulong methane reef in northeastern Dongsha and from Shenhu show both positive and negative Cerium anomalies, suggesting that the redox conditions changed significantly. Samples from different regions and from the same sites show variations in mineralogical, isotopic and elemental features, indicating that different regions, even the same sites, developed various seep fluids and gas hydrate stability. |
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来源
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热带海洋学报
,2012,31(5):45-46 【核心库】
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关键词
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冷泉碳酸盐岩
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岩石学
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碳、氧同位素
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稀土元素
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南海北部
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地址
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1.
中国科学院广州地球化学研究所, 中国科学院边缘海地质重点实验室, 广东, 广州, 510640
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中国科学院南海海洋研究所, 中国科学院边缘海地质重点实验室, 广东, 广州, 510301
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中国科学院广州地球化学研究所, 中国科学院边缘海地质重点实验室;;中国科学院边缘海地质重点实验室, 广东, 广州, 510640
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语种
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中文 |
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ISSN
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1009-5470 |
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学科
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海洋学 |
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基金
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GIGCAS135项目
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广东省科技计划项目
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国家自然科学基金
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文献收藏号
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CSCD:4755221
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参考文献 共
69
共4页
|
|
1.
Roberts H H. Hydrocarbon-derived carbonate buildups of the Northern Gulf-of-Mexico continental slope: a review of submersible investigations.
Geo-mar Lett,1994,14(2/3):135-148
|
被引
45
次
|
|
|
|
|
2.
陈多福. 冷泉流体沉积碳酸盐岩的地质地球化学特征.
沉积学报,2002,20(1):34-40
|
被引
77
次
|
|
|
|
|
3.
Aharon P. Geology and biology of modern and ancient submarine hydrocarbon seeps and vents: An introduction.
Geo-mar Lett,1994,14(2/3):69-73
|
被引
7
次
|
|
|
|
|
4.
Paull C K. Biological communities at the Florida Escarpment resemble hydrothermal vent taxa.
Science,1984,226:965-967
|
被引
34
次
|
|
|
|
|
5.
Suess E. Biological communities at vent sites along the subduction zone off Oregon.
The Hydrothermal vents of the Eastern Pacific: An overview,1985:475-484
|
被引
2
次
|
|
|
|
|
6.
Kulm L D. Oregon subduction zone: venting, fauna, and carbonates.
Science,1986,231:561-566
|
被引
11
次
|
|
|
|
|
7.
Le Pichon X. Topography, shortening and extrusion in the India-Eurasia collision.
Tectonics,1992,11:1085-1098
|
被引
30
次
|
|
|
|
|
8.
Le Pichon X. Nankai Trough and the fossil Shikoku Ridge: results of Box 6 Kaiko survey.
Earth Planet Sc Lett,1987,83:186-198
|
被引
3
次
|
|
|
|
|
9.
Bohrmann G. Authigenic carbonates from the Cascadia subduction zone and their relation to gas hydrate stability.
Geology,1998,26(7):647-650
|
被引
44
次
|
|
|
|
|
10.
Geinert J. Gas hydrate-associated carbonates and methane-venting at Hydrate Ridge: classification, distribution and origin of authigenic lithologies.
Natural Gas Hydrates: Occurrence, Distribution and Detection,2001:99-113
|
被引
1
次
|
|
|
|
|
11.
Campbell K A. Hydrocarbon seep and hydrothermal vent paleoenvironments and paleontology: Past developments and future research directions.
Palaeogeogr Palaeocl,2006,232(2/4):362-407
|
被引
62
次
|
|
|
|
|
12.
黄永样.
南海北部陆坡甲烷和天然气水合物地质--中德合作SO-177航次成果专报,2008:1-197
|
被引
3
次
|
|
|
|
|
13.
Mansour A S. Mineralogical and stable isotopic characterization of authigenic carbonate from a hydrocarbon seep site, Gulf of Mexico slope: Possible relation to crude oil degradation.
Mar Geol,2011,281(1/4):59-69
|
被引
3
次
|
|
|
|
|
14.
Peckmann J. Carbon cycling at ancient methane-seeps.
Chem Geol,2004,205(3/4):443-467
|
被引
80
次
|
|
|
|
|
15.
Campbell K A. Ancient hydrocarbon seeps from the Mesozoic convergent margin of California: carbonate geochemistry, fluids and paleoenvironments.
Geofluids,2002,2(2):63-94
|
被引
33
次
|
|
|
|
|
16.
Peckmann J. Methane-derived carbonates and authigenic pyrite from the northwestern Black Sea.
Mar Geol,2001,177(1/2):129-150
|
被引
64
次
|
|
|
|
|
17.
Tryon M D. Complex flow patterns through Hydrate Ridge and their impact on seep biota.
Geophys Res Lett,2001,28(14):2863-2866
|
被引
10
次
|
|
|
|
|
18.
White S N. In-situ Raman analyses of deep-sea hydrothermal and cold seep systems (Gorda Ridge and Hydrate Ridge).
Geochem Geophy Geosy,2006,7:Q05023
|
被引
14
次
|
|
|
|
|
19.
Gieskes J. A study of the chemistry of pore fluids and authigenic carbonates in methane seep environments: Kodiak Trench, Hydrate Ridge, Monterey Bay, and Eel River Basin.
Chem Geol,2005,220(3/4):329-345
|
被引
18
次
|
|
|
|
|
20.
Teichert B M A. U/Th systematics and ages of authigenic carbonates from Hydrate Ridge, Cascadia Margin: Recorders of fluid flow variations.
Geochim Cosmochim Ac,2003,67(20):3845-3857
|
被引
13
次
|
|
|
|
|
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