Geochemistry and Genesis of Bedded Cherts in Some Typical Eopaleozoic High Selenium Black Shales, China

WEN Han jie; QIU Yu zhuo; LIN Hong wen; YU Bing song; ZHANG Gui shan

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Article Navigation > Acta Sedimentologica Sinica > 2003 > 21(4): 620-626

WEN Han jie, QIU Yu zhuo, LIN Hong wen, YU Bing song, ZHANG Gui shan. Geochemistry and Genesis of Bedded Cherts in Some Typical Eopaleozoic High Selenium Black Shales, China[J]. Acta Sedimentologica Sinica, 2003, 21(4): 620-626.

Citation:

WEN Han jie, QIU Yu zhuo, LIN Hong wen, YU Bing song, ZHANG Gui shan. Geochemistry and Genesis of Bedded Cherts in Some Typical Eopaleozoic High Selenium Black Shales, China[J]. Acta Sedimentologica Sinica, 2003, 21(4): 620-626.

Geochemistry and Genesis of Bedded Cherts in Some Typical Eopaleozoic High Selenium Black Shales, China

1.
Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002;
2.
China University of Geosciences, Beijing 100083

Received Date: 2002-09-09
Rev Recd Date: 2002-12-25
Publish Date: 2003-12-10

Abstract

Bedded cherts, with varying thickness, are widely distributed in some typical eopaleozoic high Se black shales in China.Bedded cherts are mainly composed of SiO₂in chemical composition, generally more than 90%with relatively high content of Fe and low content of Mn, Al, Ti.Lithophile elements deplete in cherts, however some elements like As, Ba, Sb, etc., which are typically indicative elements for hydrothermal sedimentation, are rich in cherts.REE distribution pattern show obvious left slope with clearly negative Ce anomaly and slightly positive Eu anomaly.δ30Si values of cherts range from -0.7 ‰ to 1.2 ‰, and δ18O values of cherts range from 17.6 ‰ to 29.0 ‰.Above much evidence suggests that origin of bedded cherts mghit be ascribed to hydrothermal sedimentation.At last of the paper, the relationship between hydrothermal cherts and enrichment of Se is discussed.Based on some indirect evidence, it can be concluded that the tectonic environment that hosts cherts should be a prerequisite for the ascension of Se from the deep depth in the crust and for its enrichment at the shallow depth.In the meantime, Si-bearing hydrothermal solutions might be a desirable ”solvent ” for Se.
- bedded chert,
- selenium,
- black shales,
- hydro thermal sedimentation

References

[1]	Wen Hanjie and Qiu Yuzhuo. Geology and Geochemistry of Se-Bearing Formations in Central China[J]. International Geology Review, 2002, 44(2): 164～178
[2]	伊海生, 曾允孚, 夏文杰. 扬子地台东南大陆边缘上震旦统硅质岩的超微组构及其成因[J]. 地质学报, 1994, 68(2): 132～140[ Yi Haisheng, Zeng Yunfu and Xia Wenjie. Ultramicrofrabrics and genesis of upper Sinian chert on the southeast continental margin of the Yangtze platform[J]. Acta Geologica Sinica, 1994,68(2): 132～140]
[3]	Herzig P M. Hydrothermal silica chimney field in the Galapagos Spreeding Center at 86W[J]. Earth and Planet Science Letters, 1988, 89(1): 281～320
[4]	Adachi M, Yamamoto K, Suigisk R. Hydrothermal chert and associated siliceous rocks from the Northern Pacific: Their geological significance as indication of ocean ridge activity[J]. Sedimentary Geology, 1986, 47(1): 125～148
[5]	张爱云, 伍大茂,郭丽娜,等. 海相黑色页岩建造地球化学与成矿意义[M]. 北京:科学出版社,1987. 72～73[Zhang Aiyun, Wu Damao, Guo Lina, et al. Geochemistry and mineralized significance of marine black shale formation[M]. Beijing: Science Press, 1987. 72～73]
[6]	李有禹. 湘西北下寒武统黑色页岩伴生元素研究新进展[J]. 矿床地质, 1995,14(4):346～353[Li Youyu. New advances in the study of associated elements in lower Cambrian black shale of northwestern Hunan[J]. Mineral Deposit, 1995,14(4):346～353]
[7]	彭军, 田景春, 伊海生,等. 扬子板块东南大陆边缘晚前寒武纪热水沉积作用[J]. 沉积学报, 2000, 18(1): 107～113[Peng Jun, Tian Jingchun, Yi Haisheng, Xia Wenjie. The late Precambrian hot water sedimentation of the southeast Yangtze plate continental margin[J]. Acta Sedimentologica Sinica, 2000, 18(1): 107～113]
[8]	Bostrom K. Genesis of ferromanganese deposits-diagnostic criteria for recent and old deposits[A]. In: Rona P A, et al. Hydrothermal processes at seafloor spreading centers[C]. New York: Plenum Press, 1983. 473～483
[9]	王东安, 陈瑞君. 雅鲁藏布缝合带硅岩得地球化学成因标志及其地质意义[J]. 沉积学报, 1995,13(1): 27～31[Wang Dongan, Chen Ruijun. Geochemistry genetic criteria of silicolites in Yuluzangbu suture belt and their geological significance[J]. Acta Sedimentologica Sinica, 1995,13(1): 27～31]
[10]	Rona. Criteria for recognition of hydrothermal mineral deposits in Occanic[J]. Economic Geology, 1978, 73(2):212～214
[11]	Rona. Hydrothermal processes at seafloor spreading centers[M]. New York: Plenum Press, 1983
[12]	李胜荣,高振敏. 湘黔寒武系底部黑色岩系贵金属元素来源示踪[J]. 中国科学(D),2000,30(2):169～174[Li Shengrong, Gao Zhenmin. Source tracking of noble metals in the bottom of the Cambrian black shales in Hunan and Guizhou[J]. Science in China(Series D), 2000, 30(2): 169～174]
[13]	Fleet A J. Hydrothermal and hydrogeneous ferromanganese deposits[A]. In: Rona P A, et al, eds. Hydrothermal processes at seafloor spreading centers[C]. New York: Plenum Press, 1983. 537～570
[14]	陈多福,陈光谦,潘晶铭,等. 广东云浮大降坪大型黄铁矿矿床的热水沉积特征[J]. 地球化学, 1998,27(1):12～19[Chen Duofu, Chen Guangqian, Pan Jingming, Ma Shaogang, et al. Characteristics of the hydrothermal sedimentation of the Dajiangping superlarge pyrite deposit in Yunfu, Guangdong[J]. Geochemica, 1998, 27(1): 12～19]
[15]	Michard A. The REE content of some hydrothermal fluids[J]. Chemical Geology, 1986,55:51～60
[16]	周永章, 涂光炽, Chown E H, Guha J,等. 粤西古水剖面震旦系顶部层状硅质岩的热水成因属性: 岩石学和地球化学证据[J]. 沉积学报, 1994, 12(3): 1～11[Zhou Yongzhang, Tu Guangchi, Chown E H, Guha J, et al. Hydrothermal origin of top Sinian chert formation at Gusui, Weastern Guangdong, China: Petrologic and Geochemical Evidence[J]. Acta Sedimentologica Sinica, 1994, 12(3): 1～11]
[17]	宋天锐,丁悌平. 硅质岩中的硅同位素(δ34Si)应用于沉积相分析的新尝试[J]. 科学通报, 1989.1 408[Song Tian-rui, Ding Ti-ping. New attempt on silicon isotope applying to analysis of sedimentary facies[J]. Chinese Science Bulletin, 1989. 1 408]
[18]	Clayton R N. High temperature isotope effect in the early solar system[A]. In: Valley, et al. eds. Reviews in Mineralogy[C]. 1986, 16:129～139
[19]	Douthitt C B. The geochemistry of the stable isotope of silicon[J]. Geochimica et Cosmochimica Acta, 1982, 46(8): 1 149～1 458
[20]	Savin S M, Epstein S. The oxygen isotopic composition of coarse grained sedimentary rocks and minerals[J]. Geochimica et Cosmochimica Acta, 1970, 34(3): 323～329
[21]	刘家军. 论西秦岭喷流沉积硅岩建造及其控制的金矿床[D]. 成都:成都理工大学,1996.[ Liu Jiajun. Chert formation of hydrothermal sedimentary and relative gold deposits[D]. Chengdu: Chengdu University of Sciences and Technology, 1996]
[22]	侯增谦, 吴世迎, Urabe T. 四川呷村黑矿型矿床硅质岩的硅、氧同位素组成及其与现代海底硅质烟囱比较研究[J]. 地质论评, 1996, 42(6):531～539[Hou Zengqian, Wu ShiYing, Urabe T. Silicon and oxygen isotopic composition of cherts from the Gacun kuroko-type deposit, Sichuan, and comparison with silica chimneys from the modern seafloor[J]. Geological Review, 1996, 42(6): 531～539
[23]	Barnes H L. Geochemistry of hydrothermal ore deposits[M]. New York: Wiley-Interscience, 798
[24]	牟保磊. 元素地球化学[M]. 北京: 北京大学出版社, 1999. 227[Mou Baolei. Element geochemistry[M]. Beijing: Beijing University Press, 1999. 227]
[25]	Bjerkgard T, Bjorlykke A. Sulfide deposits in Folldal, southern trondheim region caledonides, Norway: source of metals and wall-rock alterations related to host rocks[J]. Economic Geology, 1996, 91: 676～696
[26]	Huston D L. Trace elements in sulfide minerals from eastern Australian volcanic-hosted massive sulfide deposits: Part I: Proton microprobe analyses of pyrite, chalcopyrite and sphalerite, and Part II: Selenium levels in pyrite: comparison with δ34S values and impications for the source of sulfur in volcangenic hydrothermal systems[J]. Economic Geology, 1995, 90: 1 167～1 196
[27]	So C-S, Dunchenko V Y, Yun S-T, Park M-E, et al. Te-and Se- bearing epithermal Au-Ag mineralization, Prasolovskoye, Kunasir Island Arc[J]. Economic Geology, 1995, 90: 105～117
[28]	侯增谦,浦边澈郎. 古代与现代海底黑矿型块状硫化物矿床矿石地球化学比较研究[J]. 地球化学,1996,25(3):228～241[ Hou Zengqian, Urabe T. A comparative study on geochemistry of sulfide ores from the kuroko-type deposits on ancient and modern sea-floor[J]. Geochimica, 1996, 25(3): 228～241]
[29]	Measures C L, Burton J D. The vertical distribution and oxidation states of dissolved selenium in the northeast Atlantic ocean and their relationship to biological processes[J]. Earth and Planetary Science Letters, 1980, 46:385～396

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Geochemistry and Genesis of Bedded Cherts in Some Typical Eopaleozoic High Selenium Black Shales, China

1. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002;

2. China University of Geosciences, Beijing 100083

Received Date: 2002-09-09

Rev Recd Date: 2002-12-25

Publish Date: 2003-12-10

Key words:

Abstract: Bedded cherts, with varying thickness, are widely distributed in some typical eopaleozoic high Se black shales in China.Bedded cherts are mainly composed of SiO₂in chemical composition, generally more than 90%with relatively high content of Fe and low content of Mn, Al, Ti.Lithophile elements deplete in cherts, however some elements like As, Ba, Sb, etc., which are typically indicative elements for hydrothermal sedimentation, are rich in cherts.REE distribution pattern show obvious left slope with clearly negative Ce anomaly and slightly positive Eu anomaly.δ30Si values of cherts range from -0.7 ‰ to 1.2 ‰, and δ18O values of cherts range from 17.6 ‰ to 29.0 ‰.Above much evidence suggests that origin of bedded cherts mghit be ascribed to hydrothermal sedimentation.At last of the paper, the relationship between hydrothermal cherts and enrichment of Se is discussed.Based on some indirect evidence, it can be concluded that the tectonic environment that hosts cherts should be a prerequisite for the ascension of Se from the deep depth in the crust and for its enrichment at the shallow depth.In the meantime, Si-bearing hydrothermal solutions might be a desirable ”solvent ” for Se.

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Reference (29)

[1]	Wen Hanjie and Qiu Yuzhuo. Geology and Geochemistry of Se-Bearing Formations in Central China[J]. International Geology Review, 2002, 44(2): 164～178
[2]	伊海生, 曾允孚, 夏文杰. 扬子地台东南大陆边缘上震旦统硅质岩的超微组构及其成因[J]. 地质学报, 1994, 68(2): 132～140[ Yi Haisheng, Zeng Yunfu and Xia Wenjie. Ultramicrofrabrics and genesis of upper Sinian chert on the southeast continental margin of the Yangtze platform[J]. Acta Geologica Sinica, 1994,68(2): 132～140]
[3]	Herzig P M. Hydrothermal silica chimney field in the Galapagos Spreeding Center at 86W[J]. Earth and Planet Science Letters, 1988, 89(1): 281～320
[4]	Adachi M, Yamamoto K, Suigisk R. Hydrothermal chert and associated siliceous rocks from the Northern Pacific: Their geological significance as indication of ocean ridge activity[J]. Sedimentary Geology, 1986, 47(1): 125～148
[5]	张爱云, 伍大茂,郭丽娜,等. 海相黑色页岩建造地球化学与成矿意义[M]. 北京:科学出版社,1987. 72～73[Zhang Aiyun, Wu Damao, Guo Lina, et al. Geochemistry and mineralized significance of marine black shale formation[M]. Beijing: Science Press, 1987. 72～73]
[6]	李有禹. 湘西北下寒武统黑色页岩伴生元素研究新进展[J]. 矿床地质, 1995,14(4):346～353[Li Youyu. New advances in the study of associated elements in lower Cambrian black shale of northwestern Hunan[J]. Mineral Deposit, 1995,14(4):346～353]
[7]	彭军, 田景春, 伊海生,等. 扬子板块东南大陆边缘晚前寒武纪热水沉积作用[J]. 沉积学报, 2000, 18(1): 107～113[Peng Jun, Tian Jingchun, Yi Haisheng, Xia Wenjie. The late Precambrian hot water sedimentation of the southeast Yangtze plate continental margin[J]. Acta Sedimentologica Sinica, 2000, 18(1): 107～113]
[8]	Bostrom K. Genesis of ferromanganese deposits-diagnostic criteria for recent and old deposits[A]. In: Rona P A, et al. Hydrothermal processes at seafloor spreading centers[C]. New York: Plenum Press, 1983. 473～483
[9]	王东安, 陈瑞君. 雅鲁藏布缝合带硅岩得地球化学成因标志及其地质意义[J]. 沉积学报, 1995,13(1): 27～31[Wang Dongan, Chen Ruijun. Geochemistry genetic criteria of silicolites in Yuluzangbu suture belt and their geological significance[J]. Acta Sedimentologica Sinica, 1995,13(1): 27～31]
[10]	Rona. Criteria for recognition of hydrothermal mineral deposits in Occanic[J]. Economic Geology, 1978, 73(2):212～214
[11]	Rona. Hydrothermal processes at seafloor spreading centers[M]. New York: Plenum Press, 1983
[12]	李胜荣,高振敏. 湘黔寒武系底部黑色岩系贵金属元素来源示踪[J]. 中国科学(D),2000,30(2):169～174[Li Shengrong, Gao Zhenmin. Source tracking of noble metals in the bottom of the Cambrian black shales in Hunan and Guizhou[J]. Science in China(Series D), 2000, 30(2): 169～174]
[13]	Fleet A J. Hydrothermal and hydrogeneous ferromanganese deposits[A]. In: Rona P A, et al, eds. Hydrothermal processes at seafloor spreading centers[C]. New York: Plenum Press, 1983. 537～570
[14]	陈多福,陈光谦,潘晶铭,等. 广东云浮大降坪大型黄铁矿矿床的热水沉积特征[J]. 地球化学, 1998,27(1):12～19[Chen Duofu, Chen Guangqian, Pan Jingming, Ma Shaogang, et al. Characteristics of the hydrothermal sedimentation of the Dajiangping superlarge pyrite deposit in Yunfu, Guangdong[J]. Geochemica, 1998, 27(1): 12～19]
[15]	Michard A. The REE content of some hydrothermal fluids[J]. Chemical Geology, 1986,55:51～60
[16]	周永章, 涂光炽, Chown E H, Guha J,等. 粤西古水剖面震旦系顶部层状硅质岩的热水成因属性: 岩石学和地球化学证据[J]. 沉积学报, 1994, 12(3): 1～11[Zhou Yongzhang, Tu Guangchi, Chown E H, Guha J, et al. Hydrothermal origin of top Sinian chert formation at Gusui, Weastern Guangdong, China: Petrologic and Geochemical Evidence[J]. Acta Sedimentologica Sinica, 1994, 12(3): 1～11]
[17]	宋天锐,丁悌平. 硅质岩中的硅同位素(δ34Si)应用于沉积相分析的新尝试[J]. 科学通报, 1989.1 408[Song Tian-rui, Ding Ti-ping. New attempt on silicon isotope applying to analysis of sedimentary facies[J]. Chinese Science Bulletin, 1989. 1 408]
[18]	Clayton R N. High temperature isotope effect in the early solar system[A]. In: Valley, et al. eds. Reviews in Mineralogy[C]. 1986, 16:129～139
[19]	Douthitt C B. The geochemistry of the stable isotope of silicon[J]. Geochimica et Cosmochimica Acta, 1982, 46(8): 1 149～1 458
[20]	Savin S M, Epstein S. The oxygen isotopic composition of coarse grained sedimentary rocks and minerals[J]. Geochimica et Cosmochimica Acta, 1970, 34(3): 323～329
[21]	刘家军. 论西秦岭喷流沉积硅岩建造及其控制的金矿床[D]. 成都:成都理工大学,1996.[ Liu Jiajun. Chert formation of hydrothermal sedimentary and relative gold deposits[D]. Chengdu: Chengdu University of Sciences and Technology, 1996]
[22]	侯增谦, 吴世迎, Urabe T. 四川呷村黑矿型矿床硅质岩的硅、氧同位素组成及其与现代海底硅质烟囱比较研究[J]. 地质论评, 1996, 42(6):531～539[Hou Zengqian, Wu ShiYing, Urabe T. Silicon and oxygen isotopic composition of cherts from the Gacun kuroko-type deposit, Sichuan, and comparison with silica chimneys from the modern seafloor[J]. Geological Review, 1996, 42(6): 531～539
[23]	Barnes H L. Geochemistry of hydrothermal ore deposits[M]. New York: Wiley-Interscience, 798
[24]	牟保磊. 元素地球化学[M]. 北京: 北京大学出版社, 1999. 227[Mou Baolei. Element geochemistry[M]. Beijing: Beijing University Press, 1999. 227]
[25]	Bjerkgard T, Bjorlykke A. Sulfide deposits in Folldal, southern trondheim region caledonides, Norway: source of metals and wall-rock alterations related to host rocks[J]. Economic Geology, 1996, 91: 676～696
[26]	Huston D L. Trace elements in sulfide minerals from eastern Australian volcanic-hosted massive sulfide deposits: Part I: Proton microprobe analyses of pyrite, chalcopyrite and sphalerite, and Part II: Selenium levels in pyrite: comparison with δ34S values and impications for the source of sulfur in volcangenic hydrothermal systems[J]. Economic Geology, 1995, 90: 1 167～1 196
[27]	So C-S, Dunchenko V Y, Yun S-T, Park M-E, et al. Te-and Se- bearing epithermal Au-Ag mineralization, Prasolovskoye, Kunasir Island Arc[J]. Economic Geology, 1995, 90: 105～117
[28]	侯增谦,浦边澈郎. 古代与现代海底黑矿型块状硫化物矿床矿石地球化学比较研究[J]. 地球化学,1996,25(3):228～241[ Hou Zengqian, Urabe T. A comparative study on geochemistry of sulfide ores from the kuroko-type deposits on ancient and modern sea-floor[J]. Geochimica, 1996, 25(3): 228～241]
[29]	Measures C L, Burton J D. The vertical distribution and oxidation states of dissolved selenium in the northeast Atlantic ocean and their relationship to biological processes[J]. Earth and Planetary Science Letters, 1980, 46:385～396

Geochemistry and Genesis of Bedded Cherts in Some Typical Eopaleozoic High Selenium Black Shales, China

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