我国最大古岩溶型铀矿床成因的同位素地球化学研究

闵茂中; 王湘云; 沈保培; 文光斗; 樊涛

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我国最大古岩溶型铀矿床成因的同位素地球化学研究

闵茂中, 王湘云, 沈保培, 文光斗, 樊涛

文章导航 > 沉积学报 > 1997 > 15(1): 118-122

闵茂中, 王湘云, 沈保培, 文光斗, 樊涛. 我国最大古岩溶型铀矿床成因的同位素地球化学研究[J]. 沉积学报, 1997, 15(1): 118-122.

引用本文:

闵茂中, 王湘云, 沈保培, 文光斗, 樊涛. 我国最大古岩溶型铀矿床成因的同位素地球化学研究[J]. 沉积学报, 1997, 15(1): 118-122.

Min Maozhong, Wang Xiangyun, Shen Baopei, Wen Guangdou, Fan Tao. Isotopic Geochemistry of Metallogeny for the Largest Paleokarst Uranium Deposit in China[J]. Acta Sedimentologica Sinica, 1997, 15(1): 118-122.

Citation:

Min Maozhong, Wang Xiangyun, Shen Baopei, Wen Guangdou, Fan Tao. Isotopic Geochemistry of Metallogeny for the Largest Paleokarst Uranium Deposit in China[J]. Acta Sedimentologica Sinica, 1997, 15(1): 118-122.

闵茂中, 王湘云, 沈保培, 文光斗, 樊涛. 我国最大古岩溶型铀矿床成因的同位素地球化学研究[J]. 沉积学报, 1997, 15(1): 118-122.

引用本文:

闵茂中, 王湘云, 沈保培, 文光斗, 樊涛. 我国最大古岩溶型铀矿床成因的同位素地球化学研究[J]. 沉积学报, 1997, 15(1): 118-122.

Citation:

我国最大古岩溶型铀矿床成因的同位素地球化学研究

1 南京人学地球科学系, 南京 210008;
2 核工业中南地勘局303大队, 湖南蓝山 425808

基金项目: 国家教委博士点基金,中国科学院矿床地球化学开放研究实验室基金

详细信息

作者简介:
闵茂中男 53岁副教授铀矿床学

中图分类号: P597

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文章访问数: 633
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Isotopic Geochemistry of Metallogeny for the Largest Paleokarst Uranium Deposit in China

1 Department of Earth Sciences Nanjing University Nanjing 210008;
2 No.303 Geological Party Bureau of Geology and Lxploration of Central-Ruth China Hunan 425808

摘要

摘要: 据对某大型古岩溶型铀矿床中铀－铅同位素体系及硫、碳、氧、氢同位素组成的研究结果，表明该矿床成矿物质源自矿区众多地层，成矿流体的变质水和古岩溶水（古大气降水）的混合水；成矿经历了古岩溶铀淋积富集，燕山早、晚期构造运动促使两次含铀热水溶液改造、叠加成矿（１３５～１１９。６５Ｍａ），成矿作用与古岩溶和区域地质构造演化密切相关，属古岩溶型热造铀矿床。
- 铀矿床 /
- 古岩溶 /
- 同位素地球化学
Abstract: A uranium deposit is the largest paleokarst type U deposit in loth scale and tonnage in China. Thedeposit is formed below a fossil cave and in a faulting}olution breccia system in the Lower Carbonifer-ous limestone. The temperature of mineralizing fluids ranges from 1810℃to 1500 ℃Four U一Pb ages forpitchblende and whole rock ores, 135, 131, 119 and 65 Ma, have been determined, which are obviouslyyounger than those of the wall rocks. Sulfur isotope data show that the δ³⁴ S values of pyrites from theores range from 1.00 ‰to一15. 3‰with a mean value of一6.87‰,closel to those of pyrites fromthe wall rocks(1. 00‰一15.60‰，mean- 7.06‰)，suggesting that the wall rocks are the source ofsulfur for mineralization. The five analyzed samples of calcites from the ores have δ¹³ Cvalues between 0.34‰and-3.19‰(mean一1.50‰).The similarity between the average carbon isotope composition of the ores(一1.50‰)and the wall rocks(0.53‰)is interpreted to result from an isotope exchange between the wall rock and mineralizing fluid. The lead isotope composition of pyrites from the ores andwhole}ock of Lower Carboiferous sugggests that the source of lead and urarnum in the deposit is vari-ous in strata of the ore field.The value of δ¹⁸O and δ^Dfor mineralizing fluids range from 1.5‰o 7.3‰ and from一30.4‰to一84.9‰,of metamorphic and meteoric waters.respectively, indicating that the mineralizing fluid is a mixed waterThe mineralizing process is clowly related to development historyof regional tectordic movemnets and multi-episode paleokarstification. Thus, it is named as hydrothermalreworked paleokarst type uranium deposit.
- nranmm are deposit /
- paleorarst /
- isotope geochemistry

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参考文献(1)

[1]

1 刘立钧.387地注型古岩溶铀矿床成因探讨.铀矿地质.1985.1(6):1-10.

2 Shelton K L and Rye D M. Sulfur isotope compositions ofores from mines Cape, Quebec; an example of sulfate-sulfi deisotopic disequilibria in ore-forming fluids with applications to other porphyry-type deposits, Economic Geology, 198 77 1688-1709.

3 刘裕庆等.德兴斑岩铜(铝)矿田硫同位素地质特征初步研究.中国地质科学院1i).床地质研究所所刊(第1号)1982,58-65.

4 Sheppard S M F. Charackerization and isotopic variations in Ylatnral watersRev Mineralogy, 1986, 16 165- 183

5 ELSharkawi W A.ELArefM M and Motelib A AManganese deposits in a Carboniferous paleokarst profile, Um Bogma Region,West-central Sinal.Egypt, Mineralum De- posita, 1990, 25 34-43.

6 Olson RA. Genesis of paleoka rst and s t rat a-b ou nd zinc-leadsulfide deposits in a Proterozoic dolostonet NorthernIsland, Canada, Economic Geology, 1984, 79 1056-1103

7 W allace A R.The relief canyon gold deposit, Nevadaa mineralized solution breccia Economic Geology, 1989, 84 274-190

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文章访问数: 633
HTML全文浏览量: 9
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我国最大古岩溶型铀矿床成因的同位素地球化学研究

1 南京人学地球科学系, 南京 210008;

2 核工业中南地勘局303大队, 湖南蓝山 425808

基金项目: 国家教委博士点基金,中国科学院矿床地球化学开放研究实验室基金

作者简介:
闵茂中男 53岁副教授铀矿床学

收稿日期: 1995-03-29
刊出日期: 1997-03-10

中图分类号: P597

关键词:

铀矿床 /

古岩溶 /

同位素地球化学

摘要: 据对某大型古岩溶型铀矿床中铀－铅同位素体系及硫、碳、氧、氢同位素组成的研究结果，表明该矿床成矿物质源自矿区众多地层，成矿流体的变质水和古岩溶水（古大气降水）的混合水；成矿经历了古岩溶铀淋积富集，燕山早、晚期构造运动促使两次含铀热水溶液改造、叠加成矿（１３５～１１９。６５Ｍａ），成矿作用与古岩溶和区域地质构造演化密切相关，属古岩溶型热造铀矿床。

English Abstract

Isotopic Geochemistry of Metallogeny for the Largest Paleokarst Uranium Deposit in China

1 Department of Earth Sciences Nanjing University Nanjing 210008;

2 No.303 Geological Party Bureau of Geology and Lxploration of Central-Ruth China Hunan 425808

Received Date: 1995-03-29
Publish Date: 1997-03-10

Keywords:

Abstract: A uranium deposit is the largest paleokarst type U deposit in loth scale and tonnage in China. Thedeposit is formed below a fossil cave and in a faulting}olution breccia system in the Lower Carbonifer-ous limestone. The temperature of mineralizing fluids ranges from 1810℃to 1500 ℃Four U一Pb ages forpitchblende and whole rock ores, 135, 131, 119 and 65 Ma, have been determined, which are obviouslyyounger than those of the wall rocks. Sulfur isotope data show that the δ³⁴ S values of pyrites from theores range from 1.00 ‰to一15. 3‰with a mean value of一6.87‰,closel to those of pyrites fromthe wall rocks(1. 00‰一15.60‰，mean- 7.06‰)，suggesting that the wall rocks are the source ofsulfur for mineralization. The five analyzed samples of calcites from the ores have δ¹³ Cvalues between 0.34‰and-3.19‰(mean一1.50‰).The similarity between the average carbon isotope composition of the ores(一1.50‰)and the wall rocks(0.53‰)is interpreted to result from an isotope exchange between the wall rock and mineralizing fluid. The lead isotope composition of pyrites from the ores andwhole}ock of Lower Carboiferous sugggests that the source of lead and urarnum in the deposit is vari-ous in strata of the ore field.The value of δ¹⁸O and δ^Dfor mineralizing fluids range from 1.5‰o 7.3‰ and from一30.4‰to一84.9‰,of metamorphic and meteoric waters.respectively, indicating that the mineralizing fluid is a mixed waterThe mineralizing process is clowly related to development historyof regional tectordic movemnets and multi-episode paleokarstification. Thus, it is named as hydrothermalreworked paleokarst type uranium deposit.

闵茂中, 王湘云, 沈保培, 文光斗, 樊涛. 我国最大古岩溶型铀矿床成因的同位素地球化学研究[J]. 沉积学报, 1997, 15(1): 118-122.

引用本文:

闵茂中, 王湘云, 沈保培, 文光斗, 樊涛. 我国最大古岩溶型铀矿床成因的同位素地球化学研究[J]. 沉积学报, 1997, 15(1): 118-122.

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我国最大古岩溶型铀矿床成因的同位素地球化学研究

作者简介:
闵茂中男 53岁副教授铀矿床学

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Isotopic Geochemistry of Metallogeny for the Largest Paleokarst Uranium Deposit in China

计量

目录

我国最大古岩溶型铀矿床成因的同位素地球化学研究

1 南京人学地球科学系, 南京 210008;

2 核工业中南地勘局303大队, 湖南蓝山 425808

作者简介:
闵茂中男 53岁副教授铀矿床学

English Abstract

Isotopic Geochemistry of Metallogeny for the Largest Paleokarst Uranium Deposit in China

1 Department of Earth Sciences Nanjing University Nanjing 210008;

2 No.303 Geological Party Bureau of Geology and Lxploration of Central-Ruth China Hunan 425808

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我国最大古岩溶型铀矿床成因的同位素地球化学研究

作者简介: 闵茂中 男 53岁 副教授 铀矿床学

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Isotopic Geochemistry of Metallogeny for the Largest Paleokarst Uranium Deposit in China

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出版历程

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我国最大古岩溶型铀矿床成因的同位素地球化学研究

1 南京人学地球科学系, 南京 210008; 2 核工业中南地勘局303大队, 湖南蓝山 425808

作者简介: 闵茂中 男 53岁 副教授 铀矿床学

English Abstract

Isotopic Geochemistry of Metallogeny for the Largest Paleokarst Uranium Deposit in China

1 Department of Earth Sciences Nanjing University Nanjing 210008; 2 No.303 Geological Party Bureau of Geology and Lxploration of Central-Ruth China Hunan 425808

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目录

友情链接

期刊在线

联系我们

作者简介:
闵茂中男 53岁副教授铀矿床学

1 南京人学地球科学系, 南京 210008;

2 核工业中南地勘局303大队, 湖南蓝山 425808

作者简介:
闵茂中男 53岁副教授铀矿床学

1 Department of Earth Sciences Nanjing University Nanjing 210008;

2 No.303 Geological Party Bureau of Geology and Lxploration of Central-Ruth China Hunan 425808