| Isotopic Characteristics of Mesozoic Au-Ag Polymetallic Ore Deposits in Northern Hebei and Their Ore-Forming Materials Source |
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| 作者姓名： | 王宝德 牛树银 孙爱群 李红阳 |
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| 作者单位： | GeologicalSurveyofShijiazhuang,EconomicsUniversity,Shijiazhuang050031,China |
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| 基金项目： | theNationalNaturalScienceFoundationofChina (GrantNo .40 2 72 0 88)，Geo
logicalSurveyingProjectofGeologicalSurveyPartysponsoredbytheGeologicalSurveyBureauofChina (No .2 0 0 1 1 0 1 0 0 038)，theFundsfortheProjectsfortheKeyTeachersofHigherLearningSch |
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| 摘 要： | It has long been a controversy about the source of ore-forming materials of Au-Ag polymetallic deposits both in metallogenic theory and in ore-searching practice. In terms of a large wealth of the isotopic statistics data from Indosinian-Yanshanian endogenic ore deposits in northern Hebei (generally referring to the areas along the northern part of Taihang Mountains and northern Hebei, the same below) , it is considered that the ore-forming materials came from the deep interior of the Earth, which had migrated through plumes to the Earth surface while ex-perienced multi-stage evolution and then emplaced progressively in favorable structural loci to form ores. Their isotope data show that 559 sulfur isotopic data from 40 ore deposits are, for the most part, within the range of -5‰ -5‰, with a high degree of homogenization, indicating that the sulfur is derived mainly from magma; 200 lead isotope data from 37 ore deposits indi-cate that the ore-forming materials are principally of mantle source though some crust-source ma-terial was involved; 96 oxygen, hydrogen and carbon isotope data from 34 ore deposits illustrate that the ore-forming fluids are dominated by magmatic water while other sources of water would be involved. It may therefore be seen that the formation of endogenic deposits has nothing to do with the strata .
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| 关 键 词： | 同位素特征 中生代 金-银多金属矿床 内生矿床 河北 Indosinian-Yanshanian周期 成矿 |
Isotopic characteristics of mesozoic Au-Ag polymetallic ore deposits in northern Hebei and their ore-forming materials source |
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| Wang Baode,Niu Shuyin,Sun Aiqun,Li Hongyang.Isotopic Characteristics of Mesozoic Au-Ag Polymetallic Ore Deposits in Northern Hebei and Their Ore-Forming Materials Source[J].Chinese Journal of Geochemistry,2003,22(3):203-214. |
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| Authors: | Wang Baode Niu Shuyin Sun Aiqun Li Hongyang |
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| Institution: | (1) Geological Survey of Shijiazhuang, Economics University, 050031 Shijiazhuang, China |
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| Abstract: | It has long been a controversy about the source of ore-forming materials of Au-Ag polymetallic deposits both-in metallogenic
theory and in ore-searching practice. In terms of a large wealth of the isotopic statistics data from Indosinian-Yanshanian
endogenic ore deposits in northern Hebei (generally referring to the areas along the northern part of Taihang Mountains and
northern Hebei, the same below), it is considered that the ore-forming materials came from the deep interior of the Earth,
which had migrated through plumes to the Earth surface while experienced multi-stage evolution and then emplaced progressively
in favorable structural loci to form ores. Their isotope data show that 559 sulfur isotopic data from 40 ore deposits are,
for the most part, within the range of −5% - 5%, with a high degree of homogenization, indicating that the sulfur is derived
mainly from magma; 200 lead isotope data from 37 ore deposits indicate that the ore-forming materials are principally of mantle
source though some crust-source material was involved; 96 oxygen, hydrogen and carbon isotope data from 34 ore deposits illustrate
that the ore-forming fluids are dominated by magmatic water while other sources of water would be involved. It may therefore
be seen that the formation of endogenic deposits has nothing to do with the strata.
This research project was financially supported jointly by the National Natural Science Foundation of China (Grant No. 40272088),
Geological Surveying Project of Geological Survey Party sponsored by the Geological Survey Bureau of China (No. 200110100038)
and the Funds for the Projects for the Key Teachere of Higher Learning Schools (J-2000-25). |
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| Keywords: | endogenic deposit mantle branch structure source of ore\|forming material metallogenic process Indosinian\|Yanshanian periods Hebei Province |
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