Application of ICP-MS to Study the Rare Earth Element Characteristics and Sedimentary Environment of Black Shale in the Longmaxi Formation in the Southwestern Sichuan Basin

Qian ZHANG; Qian YU; Jian WANG; Yuan-fu XIAO; Jin-xiang CHENG; An-kun ZHAO; Bin ZHANG

doi:10.15898/j.cnki.11-2131/td.201705090078

2018 Vol. 37, No. 2

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Article navigation > Rock and Mineral Analysis > 2018 > 37(2): 217-224

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Qian ZHANG, Qian YU, Jian WANG, Yuan-fu XIAO, Jin-xiang CHENG, An-kun ZHAO, Bin ZHANG. Application of ICP-MS to Study the Rare Earth Element Characteristics and Sedimentary Environment of Black Shale in the Longmaxi Formation in the Southwestern Sichuan Basin[J]. Rock and Mineral Analysis, 2018, 37(2): 217-224. doi: 10.15898/j.cnki.11-2131/td.201705090078

Citation:

Qian ZHANG, Qian YU, Jian WANG, Yuan-fu XIAO, Jin-xiang CHENG, An-kun ZHAO, Bin ZHANG. Application of ICP-MS to Study the Rare Earth Element Characteristics and Sedimentary Environment of Black Shale in the Longmaxi Formation in the Southwestern Sichuan Basin[J]. Rock and Mineral Analysis, 2018, 37(2): 217-224. doi: 10.15898/j.cnki.11-2131/td.201705090078

Application of ICP-MS to Study the Rare Earth Element Characteristics and Sedimentary Environment of Black Shale in the Longmaxi Formation in the Southwestern Sichuan Basin

1.
Chengdu Geological Survey Center, China Geological Survey, Chengdu 610081, China
2.
School of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
3.
Key Laboratory of Sedimentary Basin and Oil & Gas Resources, Ministry of Land and Resources, Chengdu 610081, China

More Information

Corresponding author: Qian YU, 383609899@qq.com

Received Date: 09 May 2017

Revised Date: 24 October 2017

Accepted Date: 08 January 2018

Abstract

Abstract

In order to study the sedimentary environment, tectonic background, and source features of the Longmaxi Formation black shale in the Yanyuan Basin, southwest Sichuan and guide regional shale gas exploration and related research, the rare earth element (REE) composition of these rocks was analyzed by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) in this study. The results show that ΣREEs are low with the enrichment of light rare earth and the depletion of heavy rare earth, and significant differentiation between them. These rocks have an average δCe_N value of 0.87, indicating a weakly negative Ce anomaly. They have δEu_N values of 0.66-1.43 with a large variation, indicating that the composition of the source rock is complex. Average (La/Yb)_S value of 1.31 indicates that tectonic background of the study area is mainly passive continental margin. The source rocks are mixed ancient sedimentary rocks, granites, and intermediate-mafic rocks. Neagtive δCe_S and positive δEu_S anomalies, as well as La/Ce < 1 indicate that the sedimentary water body is a reducing environment formed by a deep-water shelf sedimentation and affected by a certain degree of hydrothermal sedimentation. Deep-sea hydrothermal fluids can bring rich nutrients, which favours the formation of organic matter. The reduction of a water environment is helpful for the preservation of organic matter, hence making the study area rich in organic matter with a large thickness. It is inferred that the black shale in Longmaxi Formation is a high-quality source rock reservoir.
- Yanyuan Basin /
- black shale /
- rare earth elements /
- sedimentary environment /
- Inductively Coupled Plasma-Mass Spectrometry

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References

[1]	田景春, 张翔.沉积地球化学[M].北京:地质出版社, 2016. Google Scholar Tian J C, Zhang X.Sedimentary Geochemistry[M].Beijing:Geological Publishing House, 2016. Google Scholar
[2]	王淑芳, 董大忠, 王玉满, 等.四川盆地南部志留系龙马溪组富有机质页岩沉积环境的元素地球化学判别指标[J].海相油气地质, 2014, 19(3):27-34. Google Scholar Wang S F, Dong D Z, Wang Y M, et al.Geochemistry evaluation index of redox-sensitive elements for depositional environments of silurian Longmaxi organic-rich shale in the south of Sichuan Basin[J].Marine Origin Petroleum Geology, 2014, 19(3):27-34. Google Scholar
[3]	郭旭升.涪陵页岩气田焦石坝区块富集机理与勘探技术[M].北京:科学出版社, 2014. Google Scholar Guo X S.Enrichment Mechanism and Exploration Technology in Jiao Shiba Block of Fuling Shale Gas Field[M].Beijing:Science Press, 2014. Google Scholar
[4]	李双建, 肖开华, 沃玉进, 等.湘西、黔北地区志留系稀土元素地球化学特征及其地质意义[J].现代地质, 2008, 22(2):133-140. Google Scholar Li S J, Xiao K H, Wo Y J, et al.REE Geochemical characteristics and their geological signification in silurian west of Hunan Province and north of Guizhou Province[J].Geoscience, 2008, 22(2):133-140. Google Scholar
[5]	张廷山, 陈晓慧, 兰光志, 等.川东南地区志留纪稀土元素分布及其地质意义[J].西南石油大学学报(自然科学版), 1998, 20(3):26-30. Google Scholar Zhang T S, Chen X H, Lan G Z, et al.Distribution and geological significance of REE in the Silurian of Southeast Sichuan[J].Journal of Southwest Petroleum University (Natural Science Edition), 1998, 20(3):26-30. Google Scholar
[6]	张春明, 姜在兴, 郭英海, 等.川东南-黔北地区龙马溪组地球化学特征与古环境恢复[J].地质科技情报, 2013, 32(2):124-130. Google Scholar Zhang C M, Jiang Z X, Guo Y H, et al.Geochemical characteristics and paleoenvironment reconstruction of the Longmaxi Formation in Southeast Sichuan and Northern Guizhou[J].Geological Science and Technology Information, 2013, 32(2):124-130. Google Scholar
[7]	李娟, 于炳松, 郭峰.黔北地区下寒武统底部黑色页岩沉积环境条件与源区构造背景分析[J].沉积学报, 2013, 31(1):20-31. Google Scholar Li J, Yu B S, Guo F.Depositional setting and tectonic background analysis on lower cambrian black shales in the north of Guizhou Province[J].Acta Sedimentologica Sinica, 2013, 31(1):20-31. Google Scholar
[8]	赵平, 李爱民, 刘建中, 等.应用ICP-MS研究黔西南地区构造蚀变体稀土元素地球化学特征[J].岩矿测试, 2017, 36(1):89-96. Google Scholar Zhao P, Li A M, Liu J Z, et al.Application of ICP-MS to study REE geochemistry of structure alteration rocks in Southwestern Guizhou Province, China[J].Rock and Mineral Analysis, 2017, 36(1):89-96. Google Scholar
[9]	邱灵佳, 黄国林, 帅琴, 等.灼烧法中有机质与总有机碳换算关系的重建及其在页岩分析中的应用[J].岩矿测试, 2015, 34(2):218-223. Google Scholar Qiu L J, Huang G L, Shuai Q, et al.Reconstruction of the conversion relationship between organic matter and total organic carbon in calcination method and its application in shale analysis[J].Rock and Mineral Analysis, 2015, 34(2):218-223. Google Scholar
[10]	郭振华, 何汉江, 田凤英.混合酸分解-电感耦合等离子体质谱法测定磷矿石中15种稀土元素[J].岩矿测试, 2014, 33(1):25-28. Google Scholar Guo Z H, He H J, Tian F Y.Determination of rare earth elements in phosphate ores by inductively coupled plasma-mass spectrometry with mixed acid dissolution[J].Rock and Mineral Analysis, 2014, 33(1):25-28. Google Scholar
[11]	吴石头, 王亚平, 孙德忠, 等.电感耦合等离子体发射光谱法测定稀土矿石中15种稀土元素——四种前处理方法的比较[J].岩矿测试, 2014, 33(1):12-19. Google Scholar Wu S T, Wang Y P, Sun D Z, et al.Determination of 15 rare earth elements in rare earth ores by inductively coupled plasma-atomic emission spectrometry:A comparison of four different pretreatment methods[J].Rock and Mineral Analysis, 2014, 33(1):12-19. Google Scholar
[12]	毛瑞勇, 张杰, 冷济高, 等.岑巩页岩气区块牛蹄塘组黑色页岩稀土元素地球化学特征及沉积环境分析[J].矿物岩石, 2016, 36(4):66-73. Google Scholar Mao R Y, Zhang J, Leng J G, et al.Geochemical characteristics of rare earth elements and depostional environment of the Niutitang Formation black shale in Cengong shale gas block[J].Journal of Mineralogy and Petrology, 2016, 36(4):66-73. Google Scholar
[13]	Cao J, Wu M, Chen Y, et al.Trace and rare earth element geochemistry of Jurassic mudstones in the Northern Qaidam Basin, Northwest China[J].Chemie der Erde-Geochemistry, 2012, 72(3):245-252. doi: 10.1016/j.chemer.2011.12.002 CrossRef Google Scholar
[14]	Hu J J, Li Q, Li J, et al.Geochemical characteristics and depositional environment of the Middle Permian mudstones from central Qiangtang Basin, Northern Tibet[J].Geological Journal, 2016, 51(4):560-571. doi: 10.1002/gj.v51.4 CrossRef Google Scholar
[15]	Fu X, Wang J, Zeng Y, et al.Geochemistry and origin of rare earth elements (REEs) in the Shengli River oil shale, Northern Tibet, China[J].Chemie der Erde-Geochemistry, 2011, 71(1):21-30. doi: 10.1016/j.chemer.2010.07.003 CrossRef Google Scholar
[16]	秦燕, 王登红, 梁婷, 等.广西大厂锡多金属矿区深部碳酸盐岩的稀土元素特征及其地质意义[J].岩矿测试, 2014, 33(2):296-302. Google Scholar Qin Y, Wang D H, Liang T, et al.Characteristics of rare earth elements in the deep carbonate rocks and their geological significance in the Dachang tin-polymetallic deposit of Guangxi[J].Rock and Mineral Analysis, 2014, 33(2):296-302. Google Scholar
[17]	王欣欣, 郑荣才, 闫国强, 等.基于稀土元素地球化学特征的泥岩沉积环境及物源分析——以鄂尔多斯盆地陇东地区长9油层组泥岩为例[J].天然气地球科学, 2014, 25(9):1387-1394. Google Scholar Wang X X, Zheng R C, Yan G Q, et al.The mudstone sedimentary environment and provenance analysis based on the geochemical evidence of rare earth elements:Take Chang 9 oil-bearing layer in Longdong area of Ordos Basin as an example[J].Nature Gas Geoscience, 2014, 25(9):1387-1394. Google Scholar
[18]	Eker C S, Sipahi F, Kaygusuz A.Trace and rare earth elements as indicators of provenance and depositional environments of Lias cherts in Gumushane, NE Turkey[J].Chemie der Erde-Geochemistry-Interdisciplinary Journal for Chemical Problems of the Geosciences and Geoecology, 2012, 72(2):167-177. Google Scholar
[19]	Murray R W.Chemical criteria to identify the deposi-tional environment of chert:General principles and applications[J].Sedimentary Geology, 1994, 90(3-4):213-232. doi: 10.1016/0037-0738(94)90039-6 CrossRef Google Scholar
[20]	侯东壮, 吴湘滨, 刘江龙, 等.黔东南州下寒武统黑色页岩稀土元素地球化学特征[J].中国有色金属学报, 2012, 22(2):546-552. Google Scholar Hou D Z, Wu X B, Liu J L, et al.Geochemical characteristics of rare earth elements in Lower Cambrian black shale in Southeast Qian[J].The Chinese Journal of Nonferrous Metals, 2012, 22(2):546-552. Google Scholar
[21]	夏威, 于炳松, 孙梦迪.渝东南YK1井下寒武统牛蹄塘组底部黑色页岩沉积环境及有机质富集机制[J].矿物岩石, 2015, 35(2):70-80. Google Scholar Xia W, Yu B S, Sun M D.Depositional setting and enricnment mechanism of organic matter of the black shales of Niutitang Formation at the bottom of lower Cambrian, in well Yuke1, Southeast Chongqing[J].Journal of Mineralogy and Petrology, 2015, 35(2):70-80. Google Scholar