Fe-P-S geochemical characteristics of sediments in the Shenhu area of northern South China Sea and their implications for methane leakage

OU Xiangwen; WU Daidai; XIE Rui; WU Nengyou; LIU Lihua

doi:10.16562/j.cnki.0256-1492.2021080501

2022 Vol. 42, No. 1

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Article navigation > Marine Geology & Quaternary Geology > 2022 > 42(1): 96-110

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OU Xiangwen, WU Daidai, XIE Rui, WU Nengyou, LIU Lihua. Fe-P-S geochemical characteristics of sediments in the Shenhu area of northern South China Sea and their implications for methane leakage[J]. Marine Geology & Quaternary Geology, 2022, 42(1): 96-110. doi: 10.16562/j.cnki.0256-1492.2021080501

Citation:

OU Xiangwen, WU Daidai, XIE Rui, WU Nengyou, LIU Lihua. Fe-P-S geochemical characteristics of sediments in the Shenhu area of northern South China Sea and their implications for methane leakage[J]. Marine Geology & Quaternary Geology, 2022, 42(1): 96-110. doi: 10.16562/j.cnki.0256-1492.2021080501

Fe-P-S geochemical characteristics of sediments in the Shenhu area of northern South China Sea and their implications for methane leakage

1.
Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Institution of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou 510301, China
4.
Key laboratory of Gas Hydrate, Ministry of Natural Resources, Qingdao Institute of Marine Geology, Qingdao 266237, China

More Information

Corresponding author: WU Daidai, wudd@ms.giec.ac.cn

Received Date: 05 August 2021

Revised Date: 02 September 2021

Accepted Date: 02 September 2021

Publish Date: 28 February 2022

Abstract

Abstract

The Shenhu area is a key area in China for gas hydrate exploration and trial production. Research results suggest that such elements as Fe-P-S, are easily affected by the anaerobic oxidation of the methane (AOM) to form the minerals of pyrite and viviante. To study the methane seep intensity and hydrate accumulation potential of the area through Fe-P-S and other elements and their geochemical characteristics has reference significance for further understanding the gas hydrate accumulation mechanisms. In this paper, the core sediments from the Site 2A of the Shenhu area in the north of South China Sea are selected as the research target. Upon the basis of previous studies, the relationship among Fe, P, S and their implications for methane leakage are studied with the analysis data of major and trace elements, iron-bound phosphorus, authigenic apatite phosphorus, carbonate iron, magnetite iron, reducing iron, chromium-reduced sulfur (CRS), sulfur isotopes, and total organic carbon (TOC). All the data of TOC, P/Ti, Al/Ti, Ba/Ti, high active iron (Fe_HR) and other productivity indicators from the Site 2A station indicate a medium level of primary productivity. The primary productivity below 600 cmbsf (centimeter below sea floor) in water depth increases slightly deepwards. CRS content increases below 600 cmbsf and its sulfur isotope is obviously positive, which indicates the existence of AOM. The Mg/Ca and Sr/Ca are indicators of high magnesium calcite and aragonite in sediments, and Sr/Ti and Ba/Ti contents related to authigenic carbonate. They all leave peaks at 600 cmbsf, and the water around this depth, the contents of Iron-bound phosphorus and Authigenic apatite phosphorus are also high. Therefore, we speculate that the depth of 600 cmbsf is most probably the upper boundary of Sulfate Methane Transition Zone (SMTZ). The research further suggests that the content of iron-bound phosphorus increases significantly in the SMTZ, CRS and δ³⁴S in pyrite and may indicate the content of pyrite, so that methane seep can be recognized by different forms of Fe, P and S elements.
- methane seep /
- paleo-productivity /
- elemental geochemistry /
- AOM /
- Shenhu area

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References

[1]	Collett T S. Natural gas hydrates of the prudhoe bay and kuparuk river area, north slope, alaska [J]. AAPG Bulletin, 1993, 77(5): 793-812. Google Scholar
[2]	Dallimore S R, Collett T S, Weber M, et al. Drilling program investigates permafrost gas hydrates [J]. Eos Transactions American Geophysical Union, 2002, 83(18): 193-198. Google Scholar
[3]	金丽娜, 于兴河, 董亦思, 等. 琼东南盆地水合物探区第四系深水沉积体系演化及与BSR关系[J]. 天然气地球科学, 2018, 29(5):644-654 Google Scholar JIN Li’na, YU Xinghe, DONG Yisi, et al. The evolution of Quaternary depositional system in gas hydrate exploration area in Qiongdongnan Basin and its relationship with BSR [J]. Natural Gas Geoscience, 2018, 29(5): 644-654. Google Scholar
[4]	李进, 王淑红, 颜文. 海底泥火山及其与油气和天然气水合物的关系[J]. 海洋地质与第四纪地质, 2017, 37(6):204-214 Google Scholar LI Jin, WANG Shuhong, YAN Wen. Seabed mud volcano and its bearing on oil-gas and gas hydrate [J]. Marine Geology & Quaternary Geology, 2017, 37(6): 204-214. Google Scholar
[5]	刘关勇, 王旭东, 黄慧文, 等. 南海北部烟囱状碳酸盐岩记录的冷泉流体活动演化特征研究[J]. 地球化学, 2017, 46(6):567-579 doi: 10.3969/j.issn.0379-1726.2017.06.007 CrossRef Google Scholar LIU Guanyong, WANG Xudong, HUANG Huiwen, et al. Variations in fluid sources and seepages archived in carbonate chimneys from the northern South China Sea [J]. Geochimica, 2017, 46(6): 567-579. doi: 10.3969/j.issn.0379-1726.2017.06.007 CrossRef Google Scholar
[6]	冯俊熙, 杨胜雄, 梁金强, 等. 南海北部神狐东南海域沉积物孔隙水地球化学特征及其对天然气水合物的指示[J]. 海洋地质前沿, 2017, 33(7):32-44 Google Scholar FENG Junxi, YANG Shengxiong, LIANG Jinqiang, et al. Pore water geochemistry in shallow sediments from southeastern shenhu area of northern south china sea and their implications for gas hydrate occurrence [J]. Marine Geology Frontiers, 2017, 33(7): 32-44. Google Scholar
[7]	何家雄, 钟灿鸣, 姚永坚, 等. 南海北部天然气水合物勘查试采及研究进展与勘探前景[J]. 海洋地质前沿, 2020, 36(12):1-14 Google Scholar HE Jiaxiong, ZHONG Canming, YAO Yongjian, et al. The exploration and production test of gas hydrate and its research progress and exploration prospect in the northern south china sea [J]. Marine Geology Frontiers, 2020, 36(12): 1-14. Google Scholar
[8]	Peckmann J, Reimer A, Luth U, et al. Methane-derived carbonates and authigenic pyrite from the northwestern Black Sea [J]. Marine Geology, 2001, 177(1-2): 129-150. doi: 10.1016/S0025-3227(01)00128-1 CrossRef Google Scholar
[9]	Jorgensen B B, Böttcher M E, Lüschen H, et al. Anaerobic methane oxidation and a deep H₂S sink generate isotopically heavy sulfides in Black Sea sediments [J]. Geochimica et Cosmochimica Acta, 2004, 68(9): 2095-2118. doi: 10.1016/j.gca.2003.07.017 CrossRef Google Scholar
[10]	Peketi A, Mazumdar A, Joshi R K, et al. Tracing the Paleo sulfate-methane transition zones and H₂S seepage events in marine sediments: An application of C-S-Mo systematics [J]. Geochemistry, Geophysics, Geosystems, 2012, 13(10): Q10007. Google Scholar
[11]	Wehrmann L M, Titschack J, Böttcher M E, et al. Linking sedimentary sulfur and iron biogeochemistry to growth patterns of a cold-water coral mound in the Porcupine Basin, S. W. Ireland (IODP Expedition 307) [J]. Geobiology, 2015, 13(5): 424-442. doi: 10.1111/gbi.12147 CrossRef Google Scholar
[12]	Borowski W S, Rodriguez N M, Paull C K, et al. Are ³⁴S-enriched authigenic sulfide minerals a proxy for elevated methane flux and gas hydrates in the geologic record? [J]. Marine and Petroleum Geology, 2013, 43: 381-395. doi: 10.1016/j.marpetgeo.2012.12.009 CrossRef Google Scholar
[13]	Egger M, Jilbert T, Behrends T, et al. Vivianite is a major sink for phosphorus in methanogenic coastal surface sediments [J]. Geochimica et Cosmochimica Acta, 2015, 169: 217-235. doi: 10.1016/j.gca.2015.09.012 CrossRef Google Scholar
[14]	Egger M, Rasigraf O, Sapart C J, et al. Iron-mediated anaerobic oxidation of methane in brackish coastal sediments [J]. Environmental Science & Technology, 2015, 49(1): 277-283. Google Scholar
[15]	Liu J R, Izon G, Wang J S, et al. Vivianite formation in methane-rich deep-sea sediments from the South China Sea [J]. Biogeosciences, 2018, 15(20): 6329-6348. doi: 10.5194/bg-15-6329-2018 CrossRef Google Scholar
[16]	Wu D D, Xie R, Liu J, et al. Zone of metal-driven anaerobic oxidation of methane is an important sink for phosphorus in the Taixinan Basin, South China Sea [J]. Marine Geology, 2020, 427: 106268. doi: 10.1016/j.margeo.2020.106268 CrossRef Google Scholar
[17]	Naehr T H, Eichhubl V, Orphan V J, et al. Authigenic carbonate formation at hydrocarbon seeps in continental margin sediments: a comparative study [J]. Deep Sea Research Part II:Topical Studies in Oceanography, 2007, 54(11-13): 1268-1291. doi: 10.1016/j.dsr2.2007.04.010 CrossRef Google Scholar
[18]	Bayon G, Henderson G M, Bohn M. U-Th stratigraphy of a cold seep carbonate crust [J]. Chemical Geology, 2009, 260(1-2): 47-56. doi: 10.1016/j.chemgeo.2008.11.020 CrossRef Google Scholar
[19]	Bayon G, Pierre C, Etoubleau J, et al. Sr/Ca and Mg/Ca ratios in Niger Delta sediments: implications for authigenic carbonate genesis in cold seep environments [J]. Marine Geology, 2007, 241(1-4): 93-109. doi: 10.1016/j.margeo.2007.03.007 CrossRef Google Scholar
[20]	Nöthen K, Kasten S. Reconstructing changes in seep activity by means of pore water and solid phase Sr/Ca and Mg/Ca ratios in pockmark sediments of the Northern Congo Fan [J]. Marine Geology, 2011, 287(1-4): 1-13. doi: 10.1016/j.margeo.2011.06.008 CrossRef Google Scholar
[21]	杨克红, 初凤友, 叶黎明, 等. 南海北部甲烷渗漏的沉积地球化学指标(Sr/Ca和Mg/Ca)识别[J]. 吉林大学学报:地球科学版, 2014, 44(2):469-479 Google Scholar YANG Kehong, CHU Fengyou, YE Liming, et al. Implication of methane seeps from sedimentary geochemical proxies (Sr/Ca & Mg/Ca) in the Northern South China Sea [J]. Journal of Jilin University:Earth Science Edition, 2014, 44(2): 469-479. Google Scholar
[22]	王竣雅, 邬黛黛, 陈雪刚. 南海神狐海域Site 4B沉积物地球化学特征及其对甲烷渗漏的指示意义[J]. 沉积学报, 2019, 37(3):648-660 Google Scholar WANG Junya, WU Daidai, CHEN Xuegang. Geochemical characteristics of Site-4B sediments from the Shenhu Area of the South China Sea: implications for methane seepage [J]. Acta Sedimentologica Sinica, 2019, 37(3): 648-660. Google Scholar
[23]	林杞, 王家生, 付少英, 等. 南海北部沉积物中单质硫颗粒的发现及意义[J]. 中国科学:地球科学, 2015, 58(12):2271-2278 doi: 10.1007/s11430-015-5182-7 CrossRef Google Scholar LIN Qi, WANG Jiasheng, FU Shaoying, et al. Elemental sulfur in northern South China Sea sediments and its significance [J]. Science China Earth Sciences, 2015, 58(12): 2271-2278. doi: 10.1007/s11430-015-5182-7 CrossRef Google Scholar
[24]	Lin Q, Wang J S, Taladay K, et al. Coupled pyrite concentration and sulfur isotopic insight into the paleo sulfate-methane transition zone (SMTZ) in the northern South China Sea [J]. Journal of Asian Earth Sciences, 2016, 115: 547-556. doi: 10.1016/j.jseaes.2015.11.001 CrossRef Google Scholar
[25]	雷艳, 胡建芳, 向荣, 等. 末次盛冰期以来南海北部神狐海域沉积有机质的组成特征及其古气候/环境意义[J]. 海洋学报, 2017, 39(11):75-84 Google Scholar LEI Yan, HU Jianfang, XIANG Rong, et al. Composition of sedimentary organic matter in Shenhu, northern South China Sea since the last glacial maximum and its implication for paleoclimate [J]. Haiyang Xuebao, 2017, 39(11): 75-84. Google Scholar
[26]	梁金强, 王宏斌, 苏新, 等. 南海北部陆坡天然气水合物成藏条件及其控制因素[J]. 天然气工业, 2014, 34(7):128-135 Google Scholar LIANG Jinqiang, WANG Hongbin, SU Xin, et al. Natural gas hydrate formation conditions and the associated controlling factors in the northern slope of the South China Sea [J]. Natural Gas Industry, 2014, 34(7): 128-135. Google Scholar
[27]	钟志洪, 施和生, 朱明, 等. 珠江口盆地构造-地层格架及成因机制探讨[J]. 中国海上油气, 2014, 26(5):20-29 Google Scholar ZHONG Zhihong, SHI Hesheng, ZHU Ming, et al. A discussion on the tectonic-stratigraphic framework and its origin mechanism in Pearl River Mouth basin [J]. China Offshore Oil and Gas, 2014, 26(5): 20-29. Google Scholar
[28]	Lin C C, Lin A T S, Liu C S, et al. Canyon-infilling and gas hydrate occurrences in the frontal fold of the offshore accretionary wedge off southern Taiwan [J]. Marine Geophysical Research, 2014, 35(1): 21-35. doi: 10.1007/s11001-013-9203-7 CrossRef Google Scholar
[29]	Liu C S, Huang I L, Teng L S. Structural features off southwestern Taiwan [J]. Marine Geology, 1997, 137(3-4): 305-319. doi: 10.1016/S0025-3227(96)00093-X CrossRef Google Scholar
[30]	Suess E. RV Sonne cruise report SO 177: SiGer 2004; sino-german cooperative project; South China Sea continental margin: geological methane budget and environmental effects of methane emissions and gashydrates[R]. Bremerhaven: PANGAEA, 2005. Google Scholar
[31]	乔培军, 邵磊, 杨守业. 南海西南部晚更新世以来元素地球化学特征的古环境意义[J]. 海洋地质与第四纪地质, 2006, 26(4):59-65 Google Scholar QIAO Peijun, SHAO Lei, YANG Shouye. The paleoenvironmental significance of the character of the element geochemistry in the southwestern south china sea since late pleistocene [J]. Marine Geology & Quaternary Geology, 2006, 26(4): 59-65. Google Scholar
[32]	刘畅, 廖伟森, 胡建芳, 等. 南海北部东沙海区海洋氧同位素3期以来沉积有机碳记录及其古气候/环境信息[J]. 地球化学, 2019, 48(5):483-492 Google Scholar LIU Chang, LIAO Weisen, HU Jianfang, et al. Organic carbon records since the Marine Isotope Stage3 (MIS3) in Dongsha, the northern South China Sea: implications for paleoclimate and paleoenvironmental changes [J]. Geochimica, 2019, 48(5): 483-492. Google Scholar
[33]	Wu J F, Sunda W, Boyle E A, et al. Phosphate depletion in the western North Atlantic Ocean [J]. Science, 2000, 289(5480): 759-762. doi: 10.1126/science.289.5480.759 CrossRef Google Scholar
[34]	Luo Q Y, Zhong N N, Zhu L, et al. Correlation of burial organic carbon and paleoproductivity in the Mesoproterozoic Hongshuizhuang Formation, Northern North China [J]. Chinese Science Bulletin, 2013, 58(11): 1299-1309. doi: 10.1007/s11434-012-5534-z CrossRef Google Scholar
[35]	Wei G J, Liu Y, Li X H, et al. High-resolution elemental records from the South China Sea and their paleoproductivity implications [J]. Paleoceanography, 2003, 18(2): 1054. Google Scholar
[36]	Murray R W, Knowlton C, Leinen M, et al. Export production and carbonate dissolution in the central equatorial Pacific Ocean over the past 1 Myr [J]. Paleoceanography, 2000, 15(6): 570-592. doi: 10.1029/1999PA000457 CrossRef Google Scholar
[37]	Algeo T J, Kuwahara K, Sano H, et al. Spatial variation in sediment fluxes, redox conditions, and productivity in the Permian-Triassic Panthalassic Ocean [J]. Palaeogeography, Palaeoclimatology, Palaeoecology, 2011, 308(1-2): 65-83. doi: 10.1016/j.palaeo.2010.07.007 CrossRef Google Scholar
[38]	Li W H, Zhang Z H. Paleoenvironment and its control of the formation of oligocene marine source rocks in the deep-water area of the Northern South China Sea [J]. Energy & Fuels, 2017, 31(10): 10598-10611. Google Scholar
[39]	McLennan S M. Relationships between the trace element composition of sedimentary rocks and upper continental crust [J]. Geochemistry, Geophysics, Geosystems, 2001, 2(4): 1021. Google Scholar
[40]	Ren J L, Zhang J, Liu S M. A review on aluminum to titanium ratio as a geochemical proxy to reconstruct paleoproductivity [J]. Advances in Earth Science, 2005, 20(12): 1314-1320. Google Scholar
[41]	梅西, 张训华, 郑洪波, 等. 南海南部120ka以来元素地球化学记录的东亚夏季风变迁[J]. 矿物岩石地球化学通报, 2010, 29(2):134-141 doi: 10.3969/j.issn.1007-2802.2010.02.004 CrossRef Google Scholar MEI Xi, ZHANG Xunhua, ZHENG Hongbo, et al. Element geochemistry record in Southern South China Sea sediments during the past 120 ka and its implications for East Asian summer monsoon variation [J]. Bulletin of Mineralogy, Petrology and Geochemistry, 2010, 29(2): 134-141. doi: 10.3969/j.issn.1007-2802.2010.02.004 CrossRef Google Scholar
[42]	严德天, 汪建国, 张丽琴. 海相烃源岩中高活性铁丰度对古生产力的指示[J]. 中南大学学报:自然科学版, 2010, 41(1):293-298 Google Scholar YAN Detian, WANG Jianguo, ZHANG Liqin. Relationship between highly reactive iron and palaeo-productivity in marine sediment [J]. Journal of Central South University:Science and Technology, 2010, 41(1): 293-298. Google Scholar
[43]	陈慈美, 蔡阿根, 陈雷. 铁对海洋硅藻的生物活性形式及其对藻类生长的影响[J]. 海洋通报, 1993, 12(3):49-55 Google Scholar CHEN Cimei, CAI Agen, CHEN Lei. Bioavailability species of fe for marine diatom and effect on diatom growth [J]. Marine Science Bulletin, 1993, 12(3): 49-55. Google Scholar
[44]	Jørgensen B B. Mineralization of organic matter in the sea bed-the role of sulphate reduction [J]. Nature, 1982, 296(5858): 643-645. doi: 10.1038/296643a0 CrossRef Google Scholar
[45]	Hinrichs K U, Hayes J M, Sylva S P, et al. Methane-consuming archaebacteria in marine sediments [J]. Nature, 1999, 398(6730): 802-805. doi: 10.1038/19751 CrossRef Google Scholar
[46]	Boetius A, Ravenschlag K, Schubert C J, et al. A marine microbial consortium apparently mediating anaerobic oxidation of methane [J]. Nature, 2000, 407(6804): 623-626. doi: 10.1038/35036572 CrossRef Google Scholar
[47]	Canfield D E, Raiswell R, Westrich J T, et al. The use of chromium reduction in the analysis of reduced inorganic sulfur in sediments and shales [J]. Chemical Geology, 1986, 54(1-2): 149-155. doi: 10.1016/0009-2541(86)90078-1 CrossRef Google Scholar
[48]	Poulton S W, Raiswell R. Chemical and physical characteristics of iron oxides in riverine and glacial meltwater sediments [J]. Chemical Geology, 2005, 218(3-4): 203-221. doi: 10.1016/j.chemgeo.2005.01.007 CrossRef Google Scholar
[49]	Lyons P, Jones L, Goleby B, et al. Seismic structure and crustal architecture of the Fe oxide Cu-Au (IOCG) minerals system of the eastern Gawler Craton [J]. ASEG Extended Abstracts, 2006, 2006(1): 1-4. Google Scholar
[50]	Planavsky N, Rouxel O J, Bekker A, et al. Iron isotope composition of some Archean and Proterozoic iron formations [J]. Geochimica et Cosmochimica Acta, 2012, 80: 158-169. doi: 10.1016/j.gca.2011.12.001 CrossRef Google Scholar
[51]	Lyons T W. Sulfur isotopic trends and pathways of iron sulfide formation in upper Holocene sediments of the anoxic Black Sea [J]. Geochimica et Cosmochimica Acta, 1997, 61(16): 3367-3382. doi: 10.1016/S0016-7037(97)00174-9 CrossRef Google Scholar
[52]	Canfield D E. Reactive iron in marine sediments [J]. Geochimica et Cosmochimica Acta, 1989, 53(3): 619-632. doi: 10.1016/0016-7037(89)90005-7 CrossRef Google Scholar
[53]	Deusner C, Holler T, Arnold G L, et al. Sulfur and oxygen isotope fractionation during sulfate reduction coupled to anaerobic oxidation of methane is dependent on methane concentration [J]. Earth and Planetary Science Letters, 2014, 399: 61-73. doi: 10.1016/j.jpgl.2014.04.047 CrossRef Google Scholar
[54]	余克服, 赵焕庭, 朱袁智. 南沙群岛永暑礁等8座环礁现代沉积物中Ca、Sr、Mg的特征[J]. 海洋通报, 1996, 15(3):54-63 Google Scholar YU Kefu, ZHAO Huanting, ZHU Yuanzhi. Content characters about Ca, Sr and Mg in modern sediments from eight atolls of Nansha Islands [J]. Marine Science Bulletin, 1996, 15(3): 54-63. Google Scholar
[55]	Tryon M D, Brown K M. Fluid and chemical cycling at Bush Hill: Implications for gas- and hydrate-rich environments [J]. Geochemistry, Geophysics, Geosystems, 2004, 5(12): Q12004. Google Scholar
[56]	Wu N Y, Zhang H Q, Yang S X, et al. Gas hydrate system of Shenhu Area, Northern South China Sea: geochemical results [J]. Journal of Geological Research, 2011, 2011: 370298. Google Scholar
[57]	Xie R, Wu D D, Liu J, et al. Geochemical evidence of metal-driven anaerobic oxidation of methane in the Shenhu Area, the South China Sea [J]. International Journal of Environmental Research and Public Health, 2019, 16(19): 3559. doi: 10.3390/ijerph16193559 CrossRef Google Scholar
[58]	Sauer S, Crémière A, Knies J, et al. U-Th chronology and formation controls of methane-derived authigenic carbonates from the Hola trough seep area, northern Norway [J]. Chemical Geology, 2017, 470: 164-179. doi: 10.1016/j.chemgeo.2017.09.004 CrossRef Google Scholar
[59]	Filippelli G M. Controls on phosphorus concentration and accumulation in oceanic sediments [J]. Marine Geology, 1997, 139(1-4): 231-240. doi: 10.1016/S0025-3227(96)00113-2 CrossRef Google Scholar
[60]	Slomp C P, Mort H P, Jilbert T, et al. Coupled dynamics of iron and phosphorus in sediments of an oligotrophic coastal basin and the impact of anaerobic oxidation of methane [J]. PLoS One, 2013, 8(4): e62386. doi: 10.1371/journal.pone.0062386 CrossRef Google Scholar
[61]	März C, Riedinger N, Sena C, et al. Phosphorus dynamics around the sulphate-methane transition in continental margin sediments: Authigenic apatite and Fe(II) phosphates [J]. Marine Geology, 2018, 404: 84-96. doi: 10.1016/j.margeo.2018.07.010 CrossRef Google Scholar
[62]	Rothe M, Kleeberg A, Grüneberg B, et al. Sedimentary sulphur: iron ratio indicates vivianite occurrence: a study from two contrasting freshwater systems [J]. PLoS One, 2015, 10(11): e0143737. doi: 10.1371/journal.pone.0143737 CrossRef Google Scholar
[63]	Kubeneck L J, Lenstra W K, Malkin S Y, et al. Phosphorus burial in vivianite-type minerals in methane-rich coastal sediments [J]. Marine Chemistry, 2021, 231: 103948. doi: 10.1016/j.marchem.2021.103948 CrossRef Google Scholar
[64]	Lenstra W K, Egger M, Van Helmond N A G M, et al. Large variations in iron input to an oligotrophic Baltic Sea estuary: impact on sedimentary phosphorus burial [J]. Biogeosciences, 2018, 15(22): 6979-6996. doi: 10.5194/bg-15-6979-2018 CrossRef Google Scholar