综合大洋钻探计划311航次沉积物中自生黄铁矿及其硫稳定同位素研究

现代地质 ›› 2008, Vol. 22 ›› Issue (3): 402-406.

综合大洋钻探计划311航次沉积物中自生黄铁矿及其硫稳定同位素研究

陈祈^1,2，王家生^1,2*，魏清³，王晓芹^1,2，李清^1,2，胡高伟^1,2，高钰涯^1,2

1中国地质大学生物地质与环境地质教育部重点实验室，湖北武汉 430074;2中国地质大学地球科学学院，湖北武汉 430074;3中国地质大学材料科学与化学工程学院，湖北武汉 430074

收稿日期:2008-04-01 修回日期:2008-05-31 出版日期:2008-03-20 发布日期:2008-03-20
通讯作者: 王家生，男，教授，博士生导师，1963年出生，海洋地质学专业，主要从事海洋地质和造山带地质的研究工作。
作者简介:陈祈，女，硕士研究生，1983年出生，海洋地质学专业，主要从事天然气水合物领域的研究工作。Email:qiqi108423@sohu.com
基金资助:
国家自然科学基金项目（40772073）；中国石油化工股份有限公司海相油气前瞻性项目（G0800-06-ZS-319）中国石油化工股份有公司“111”引智项目（B08030）

Study on the Authigenic Pyrites and Their Sulfur Stable Isotopes in Recovered Sediments during IODP 311 Expedition

CHEN Qi^1,2, WANG Jia-sheng^1,2*, WEI Qing³, WANG Xiao-qin^1,2, LI Qing^1,2, HU Gao-wei^1,2, GAO Yu-ya^1,2

1Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, China University of Geosciences, Wuhan,Hubei 430074,China;2Faculty of Earth Sciences, China University of Geosciences, Wuhan, Hubei 430074,China;3Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan, Hubei 430074, China

Received:2008-04-01 Revised:2008-05-31 Online:2008-03-20 Published:2008-03-20

摘要/Abstract

摘要：

对综合大洋钻探计划（IODP）311航次652个岩心沉积物样品进行了自生黄铁矿颗粒筛选、显微形貌特征及其硫稳定同位素组成等初步研究。扫描电镜（SEM）照片显示黄铁矿以微球粒状和立方体状形貌产出，其成因与微生物作用和无机作用有关。黄铁矿的δ³⁴S_CDT值变化范围较大，从-35.4‰ 到+53.6‰，其成因与甲烷厌氧氧化作用（AOM）的关系密切。海水源为主的硫酸盐参与了沉积物上部的AOM过程，黄铁矿硫稳定同位素正偏的原因可能与较强的AOM作用和较多的残余硫酸盐参与有关。冷泉背景站位中黄铁矿的δ³⁴S_CDT值随着深度增加而增加，从浅表层的-35.83‰增加到深处的32.49‰，反映深处沉积物内黄铁矿形成过程中曾有过较多的残余硫酸盐参与还原，暗示其背景曾经是更高的甲烷通量和更强的AOM作用。研究结果提供了现代海洋天然气水合物背景下沉积物中自生黄铁矿及其硫稳定同位素特征记录，对于寻找我国海域天然气水合物资源，探索地史时期古海洋沉积物中甲烷事件记录具有重要的意义。

关键词: IODP 311航次, 沉积物, 自生黄铁矿, 硫稳定同位素

Abstract:

To understand better the response of authigenic minerals in sediments of the gas hydrate system, total 652 sediment samples recovered from IODP 311 Expedition were washed and all authigenic pyrites were picked up. SEM photographs show that pyrites occurred in forms of both microspheroids and cubic crystal aggregations,caused by microbial fossilization and inorganic processes,respectively. The stable sulfur isotopic compositions seem to have a wide range of δ³⁴S_CDT values from -35.4‰ to +53.6‰ for the processes of anaerobic oxidation of methane(AOM).Sea salt sulfate in the upper part of sediment column was dominantly reduced by AOM, and the remained sulfate involving reduction would probably cause positive sulfur isotopic excursion of pyrites. In the cold vent theδ³⁴S_CDT values increase gradually with depth from-35.83‰ near the top sediment to 32.49‰ in deep, indicating that more remained sulfates once involved in reduction under higher methane flux and more intensive AOM. This study will have important impact on exploring the potential marine gas hydrate in China and on deciphering the ancient methane derived sedimentary records in the Earth history.

Key words: IODP 311 Expedition, sediment, authigenic pyrite, stable sulfur isotope

中图分类号:

P736.4

陈祈，王家生，魏清，王晓芹，李清，胡高伟，高钰涯. 综合大洋钻探计划311航次沉积物中自生黄铁矿及其硫稳定同位素研究[J]. 现代地质, 2008, 22(3): 402-406.

CHEN Qi, WANG Jia-sheng, WEI Qing, WANG Xiao-qin, LI Qing, HU Gao-wei，GAO Yu-ya. Study on the Authigenic Pyrites and Their Sulfur Stable Isotopes in Recovered Sediments during IODP 311 Expedition[J]. Geoscience, 2008, 22(3): 402-406.

参考文献

[1]Elvert M, Greinert J, Suess E,et al.Carbon isotopes of biomarkers derived from methaneoxidizing at Hydrate Ridge, Cascadia convergent margin[M]//Paull C K, Dillon W P. Natural Gas Hydrates: Occurrence, Distribution and Detection. Washington: American Geophysical Union,2001:115-129.[2]Wang J, Suess E. Indicators ofδ13C and δ18O of gas hydrate-associated sediments[J]. Chinese Science Bulletin, 2002, 47: 1659-1663.

[3]Wang J, Suess E, Rickert D. Authigenic gypsum found in gas hydrateassociated sediments from Hydrate Ridge, the eastern North Pacific [J]. Science in China(Series D), 2004, 47(3): 280-288.

[4]Chen D F, Feng D, Su Z, et al. Pyrite crystallization in seep carbonates at gas vent and hydrate site[J]. Materials Science and Engineering C(Biomimetic and Supramolecular Systems), 2006,26:602-605.

[5]Greinert J, Bollwerk S M, Derkachev A, et al. Massive barite deposits and carbonate mineralization in the Derugin Basin,

Sea of Okhotsk: Precipitation processes at cold seep sites[J]. Earth and Planetary Science Letters, 2002, 203: 165-180.

[6]Torres M E, Bohrmann, Dube T E,et al. Formation of modern Paleozoic stratiform barite at cold methane seeps on continent margins[J]. Geology, 2003, 31: 897-900.

[7]Jorgensen B B, Bottcher M E, Luschen H, et al. Anaerobic methane oxidation and a deep H2S sink generate isotopically heavy sulfides in Black Sea sediments[J]. Geochemica et Cosmochimica Acta, 2004, 68(9): 2095-2118.

[8]陈祈, 王家生, 李清, 等. 海洋天然气水合物系统硫同位素研究进展[J].现代地质，2007,21(1):111-115.

[9]王晓芹，王家生，魏清, 等.综合大洋钻探计划311航次沉积物中自生碳酸盐岩碳、氧稳定同位素研究[J].现代地质,2008,22(3):397-401.

[10]Riedel M, Collett T, Malone M, et al.Integrated Ocean Drilling Program Expedition 311—Cascadia Margin Gas Hydrates:Sedimenthosted Gas Hydrates: New Insights on Natural and Synthetic Systems[M]. London: Geological Society of London, 2006.

[11]Jiang W, Chen J, Huang B,et al. Mineralogy and physical properties of cored sediments from the gas hydrate potential

area of offshore southwestern Taiwan[J]. Terrestrial, Atmospheric and Oceanic Sciences, 2006, 17(4): 981-1007.

[12]Shen B, Xiao S, Kaufman A J, et al. Stratification and mixing of a postglacial Neoproterozoic ocean: Evidence from carbon and sulfur isotopes in a cap dolostone from northwest China[J]. Earth and Planetary Science Letters, 2008, 265: 209-228.

[13]Wang J, Jiang G, Xiao S, et al. Carbon isotope evidence for widespread methane seeps in the ~635 Ma Doushantuo cap

carbonate in South China [J]. Geology, 2008, 36: 347-350.

[1]	张伟, 安茂国, 王志鹏, 杨启, 陈怀鑫, 马晓峰, 支成龙, 邢其涛, 裴长世, 王娜, 刘铭. 青海省那陵格勒河中游地区水系沉积物地球化学特征及找矿远景[J]. 现代地质, 2023, 37(03): 690-707.
[2]	梁东, 华北, 赵德怀, 吴浩, 万生楠, 谭朝欣, 赵晓健, 杨志鹏. 喀喇昆仑麦拉山地区水系沉积物地球化学特征与找矿预测[J]. 现代地质, 2023, 37(03): 708-721.
[3]	陈世明, 杨镇熙, 雷自强, 康维良, 张晶, 赵青虎. 甘肃北山前红泉地区水系沉积物地球化学特征及找矿方向[J]. 现代地质, 2022, 36(06): 1513-1524.
[4]	王斌, 任涛, 宋伊圩, 杨可, 王占彬, 孙亚柯. 西秦岭常家山地区水系沉积物地球化学特征及其地质意义[J]. 现代地质, 2022, 36(03): 911-922.
[5]	朱英海, 施泽明, 王新宇, 张凯亮, 朱伯丞. 攀西大梁子铅锌矿区水系沉积物重金属地球化学特征及源解析[J]. 现代地质, 2022, 36(03): 923-932.
[6]	孙爽, 胡克, 李琰, 杨俊鹏. 我国沿海不同气候带山溪性河流沉积物输运特征[J]. 现代地质, 2022, 36(01): 68-76.
[7]	远继东, 姜正龙, 代友旭, 郝连成, 张健康, 张德程, 郑立龙. 湛江湾海域表层沉积物稀土元素特征及其物源指示意义[J]. 现代地质, 2022, 36(01): 77-87.
[8]	王雪木, 瞿洪宝, 熊元凯, 吕琳, 胡克. 海南昌化江入海口底表沉积物粒度特征及输运趋势[J]. 现代地质, 2022, 36(01): 88-95.
[9]	魏定邦, 杨强, 夏建新. 深海沉积物贯入阻力影响因素及其变化规律[J]. 现代地质, 2021, 35(06): 1871-1879.
[10]	李超, 罗先熔, 邱炜, 王宇慧, 赵欣怡, 郑超杰, 刘攀峰. 青海省都兰县金水口地区水系沉积物地球化学异常特征及找矿前景[J]. 现代地质, 2021, 35(05): 1397-1410.
[11]	李金哲, 刘宁强, 龚庆杰, 李承柱. 广东汕头市内海湾沉积物重金属环境质量调查与评价[J]. 现代地质, 2021, 35(05): 1441-1449.
[12]	孔霄, 来风兵, 陈蜀江, 朱选. 别里库姆沙漠胡杨回涡沙丘表层沉积物粒度特征[J]. 现代地质, 2021, 35(03): 657-664.
[13]	曾凯, 刘海, 黄德将, 郭威, 漆双林, 斯小华, 杨育振. 云南勐翁地区1:5万水系沉积物测量异常特征及找矿效果分析[J]. 现代地质, 2021, 35(01): 270-280.
[14]	黄永高, 熊昌利, 罗改, 张彤, 贾小川, 杨学俊, 叶春林, 王燚. 滇西北香格里拉翁水地区水系沉积物地球化学特征及找矿预测[J]. 现代地质, 2020, 34(05): 897-907.
[15]	汤世凯, 张杰, 于晓静, 陶志斌, 李金鹏. 山东丁字湾海域沉积物重金属含量、分布及与粒径之间的关系研究[J]. 现代地质, 2020, 34(05): 928-935.