Discovery of Authigenic Monazite in Precambrian Sedimentary Rocks and Its Significance

SONG Tian-rui; HE Zhen-jun; WAN Yu-sheng; ZHANG Qiao-da; DING Xiao-zhong

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Article Navigation > Acta Sedimentologica Sinica > 2003 > 21(1): 118-124

SONG Tian-rui, HE Zhen-jun, WAN Yu-sheng, ZHANG Qiao-da, DING Xiao-zhong. Discovery of Authigenic Monazite in Precambrian Sedimentary Rocks and Its Significance[J]. Acta Sedimentologica Sinica, 2003, 21(1): 118-124.

Citation:

SONG Tian-rui, HE Zhen-jun, WAN Yu-sheng, ZHANG Qiao-da, DING Xiao-zhong. Discovery of Authigenic Monazite in Precambrian Sedimentary Rocks and Its Significance[J]. Acta Sedimentologica Sinica, 2003, 21(1): 118-124.

Discovery of Authigenic Monazite in Precambrian Sedimentary Rocks and Its Significance

Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037

Received Date: 2002-12-26
Rev Recd Date: 2003-01-10
Publish Date: 2003-03-10

Abstract

The authigenic monazite have been discovered for the first time in the Shisanlitai Formation, Sinia System of Precambrian sedimentary rock from Dalian area. That was inspired by the discovery of auhtigenic galena in the Gejiatong Formation. There are listed in this paper same examples of North China, where are abnormal high contents of Ce and REE in the Precambrian sedimentary rocks being expected to find authigenic monazite either in above areas or to offer the possibility using U,Th-Pb isotopic method for geo-age determination. This paper introduces new data of authigenic monazite, which recently have been found in Mid-Proterozoic strata of the Ming Tombs District, Beijing. The electron scattered forms of authigenic monazite are quiet different with crystalline forms of magmatic, metamophzeic, and placer monazite grains. This paper recognizes that high contents of REE, especially, higher LREE of Proterozoic mudstones are deposits near old continental crust. The statistical data of La+Ce+Nd, Yb+Y, and Sm+Gd+Dy ratio and plotting in a triangle diagram with Preterozoic mudstones of the Ming Tombs District, Beijing, Golden Pebble Beach, Dalian, and Liaoning Province shows that those samples with more La+Ce+Nd belong to near old continental crust deposits. This paper compares for the first time with the Proterozoic sedimentary rocks of North China and phosphate rocks of Sinian System of South China showing the later plotted points far away from La+Ce+Nd end point due to the phosphorus element from ocean upwelling. According to analysis of sedimentary environment of the Shisanlitai Formation, Sinian System of Dalian the authigenic monazite should be formed by biomineralization processes. It is demonstrated that local sub-reducing environment under entire oxidation environment created authigenic monazite formation, based on which a reef-back lagoon biomineralization model has been established in this paper. Meanwhile, it is supposed that the Precambrian sedimentary rocks with rich rare earth elements of North China might be the ore-source beds of the huge rare earth mineral deposits of the Baiyun Obo, Inner Mongolia.
- authigenic monazite,
- Precambrian,
- sedimentary rocks,
- biomineralization,
- rare earth elements

References

[1]

［1］宋天锐. 大连地区前寒武纪沉积岩中发现自生独居石及其意义[J].沉积学报,1999,17(Supp):663～667[Song Tianrui. Discovery of Authigenic Rare Eart h Mineral-Monazite in Precambrian Sedimentary Rock of Dalian Area and its Signi ficance[J]. Acta Sedimentologica Sinica, 1999, 17(Supp):663～667]

［2］宋天锐,乔秀夫. 辽宁金县寒武纪早期生物矿化迹象[J].矿床地质,1992,11 (4):359～366[ Song Tianrui and Qiao Xiufu. A trace of biomineralization in th e Early Cambrian of Jingxiang County, Liaoning Province[J]. Mineral Deposits, 1992, 11(4):359～366]

［3］乔秀夫,宋天锐,李海兵等. 辽南半岛南部震旦系-下寒武统成因地层-附大连金石滩海岸国家级风景区旅游导游[M].北京:科学出版社,1996.106～127[Qiao Xiufu, Song Tianrui, Lihaibing, et al. Genetic Stratigraphy of the Sinian and Lower Cambrian Strata in South Liaoning Province-Guidebook of National Scenic Area o f Jinshitan Beach[M]. Beijing: Science Press, 1996.108～127]

［4］和政军. 辽宁中元古代-中生代泥质岩稀土元素地球化学[J].地球化学,1988 ,92:129～135[He Zhenjun. REE Geochemistry of Middle Proterozoic-Mesozoic Pelit es in Liaoning Province[J]. Geochemistry, 1988,(2):129～135]

［5］宋天锐,赵震,王长尧等. 华北元古宙沉积岩[M].北京:科学技术出版社,199 1.45～52[Song Tianrui, Zhao Zhen, Wang Chuangyao, et al. Proterozoic Sedimen tary Rocks in North China[M]. Beijing: Beijing Scientific Technological Publi shing House, 1991.166～184]

［6］宋天锐,和政军,丁孝忠等. 北京十三陵元古宙大红峪组含事件信息的沉积岩研究[J].岩石矿物学杂志,2000,10(4):323～332[Song Tianrui, He Zhenjun, Ding X iaozhong, et al. A Study of Event Message-bearing Sedimentary Rocks of the Dahongyu Formation from the Ming Tombs District, Beijing[J]. Acta Petrologica et Mineralogica, 2000,19(4):321～332]

［7］Matthes S. Mineralogy[M]. Springer, 1996.266～269

［8］宋天锐,张巧大,万渝生. 一种含自生独居石富钾、富稀土的多硅白云母泥岩[J ].沉积岩报,(待刊)[Song Tianrui, Zhang Qiaoda, Wan Yusheng. A rich K and REE phengite mudstone bring authigenic monazite[G]. Acta Sedimentologca Sinic a, (in press)]

［9］叶连俊等. 生物有机质成矿作用和成矿背景[M]. 北京:海洋出版社,1998.205 ～213[Ye Lianjun, et al. Biomineralization and its geologic Background[M]. Beijing: Oceanological Publishing House,1998.190～212]

［10］Taylor S R, Melennan S M. The continental crust: its composition and evoluti on [M]. London: Blackwell, Scientific Publication, 1985. 9～140

［11］Fairchild I J, Einsele G, Tianrui Song. Possible seismic origin of molar to oth structures in Neoproterozoic carbonate ramp deposits, North China [J]. Sed imentology, 1977, 44: 611～636

［12］Ye Lianjun. Aspects of Biomineralization[M]. Beijing: Seismological Press , 1996. 66～89

［13］Song Tianrui, Gerhard Einsele. Proterozoic sedimentary facies and their dep ositional environments in the Ming Tombs District, Beijing [C]. 30th internat ional Geological Congress Field Trip Guide. Beijing:Geological Publishing House, 1996. T201.1-201.26

［14］张巧大,宋天锐,和政军等. 北京十三陵地区中-新元古界碳酸岩盐Pb-Pb年龄研究[ J]. 地质论评,2002,48(4):416～423[Zhang Qiaoda, Song Tianrui, He Zhangjun, et al. Pb-Pb Age Determination of Meso-to Neoproterozoic Carbonates in the Mi ng Tombs District, Beijing[J].Geological Review, 2002,48(4):423～428]

［15］宋天锐. 重砂矿物分析方法[M]. 北京: 地质出版社, 1957.115～123[Song Tianrui. Analytic Methods of Heavy Minerals[M]. Beijing: Geological Publishing House, 1957. 115～123]

［16］白鸽,袁忠信. 白云鄂博矿床地质特征和成因论证[M]. 北京: 地质出版社,1996. 3 6～38[Bai G, Yuan Z X. Investigation on Geologic Features and Origin of Baiyun Obo Mineral Deposit[M]. Beijing: Geological Publishing House, 1996.36～38]

［17］Drew L J, Qingrun M, Weijun S. Baiyun Obo iron-rare-earth-niobium deposit s, lnner Mongolia, China [J]. Lithos, 1990, 26:43～65

［18］Jenes A P, Wall F, Eilliams C T, eds. Rare Earth Minerals; Chemistry, origi n and ore deposits [C]. Chapman and Hall, 1996. 257～279

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Discovery of Authigenic Monazite in Precambrian Sedimentary Rocks and Its Significance

Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037

Received Date: 2002-12-26

Rev Recd Date: 2003-01-10

Publish Date: 2003-03-10

Key words:

Abstract: The authigenic monazite have been discovered for the first time in the Shisanlitai Formation, Sinia System of Precambrian sedimentary rock from Dalian area. That was inspired by the discovery of auhtigenic galena in the Gejiatong Formation. There are listed in this paper same examples of North China, where are abnormal high contents of Ce and REE in the Precambrian sedimentary rocks being expected to find authigenic monazite either in above areas or to offer the possibility using U,Th-Pb isotopic method for geo-age determination. This paper introduces new data of authigenic monazite, which recently have been found in Mid-Proterozoic strata of the Ming Tombs District, Beijing. The electron scattered forms of authigenic monazite are quiet different with crystalline forms of magmatic, metamophzeic, and placer monazite grains. This paper recognizes that high contents of REE, especially, higher LREE of Proterozoic mudstones are deposits near old continental crust. The statistical data of La+Ce+Nd, Yb+Y, and Sm+Gd+Dy ratio and plotting in a triangle diagram with Preterozoic mudstones of the Ming Tombs District, Beijing, Golden Pebble Beach, Dalian, and Liaoning Province shows that those samples with more La+Ce+Nd belong to near old continental crust deposits. This paper compares for the first time with the Proterozoic sedimentary rocks of North China and phosphate rocks of Sinian System of South China showing the later plotted points far away from La+Ce+Nd end point due to the phosphorus element from ocean upwelling. According to analysis of sedimentary environment of the Shisanlitai Formation, Sinian System of Dalian the authigenic monazite should be formed by biomineralization processes. It is demonstrated that local sub-reducing environment under entire oxidation environment created authigenic monazite formation, based on which a reef-back lagoon biomineralization model has been established in this paper. Meanwhile, it is supposed that the Precambrian sedimentary rocks with rich rare earth elements of North China might be the ore-source beds of the huge rare earth mineral deposits of the Baiyun Obo, Inner Mongolia.

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Discovery of Authigenic Monazite in Precambrian Sedimentary Rocks and Its Significance

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