| Re—Os Isotope Ages of Molybdenum Deposits in East Qinling and Their Significance |
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| 引用本文： | 黄典豪,杜安道,等.Re—Os Isotope Ages of Molybdenum Deposits in East Qinling and Their Significance[J].中国地球化学学报,1995,14(4):313-322. |
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| 作者姓名： | 黄典豪 杜安道 |
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| 作者单位： | [1]InstituteofMineralDeposits,ChineseAcademyofGelogicalSciences,Beijing100037 [2]InstituteofRockandMineralA,ChineseAcademyofGelogicalSciences,Beijing100037 |
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| 摘 要： | Dating of metallic ore deposits has been one of the problems concerned with by ore geologists for many years.The establishment of the Re-Os Isotope Laboratory at the Institute of Rock and Mineral Analysis,Chinese Academy of Geological Sciences, has provided us with a new technique to carry out geochronological studies of molybdenum ores.As one of the most important Re-bearing minerals, molybdenite contains almost no common osmium, but ^187Os was derived completely from decay of ^187Re, with ^187Os content as the function of Re content in the mineral .An ID-ICP-MS technique has been used in this study,and Re-Os isotopic ages of several large molybdenum deposits of differ-ent types from the East Qinling molybdenum belt have been determined.It is indicated that the Huanglongpu carbonatite vein-type molybdenum-(lead) deposit has a Re-Os age corresponding to Indosinian,while the rest porphyry-type molybdenum deposits and porphyry-skarn-type molybdenum-(tungsten) deposits have Re-Os ages corresponding to Yenshanian.
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| 关 键 词： | 钼矿床 铼同位素 锇同位素 秦岭地区 年代学 |
Re-Os Isotope ages of molybdenum deposits in East Qinling and their significance |
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| Dianhao Huang,Chengyu Wu,Andao Du,Hongliao He.Re-Os Isotope ages of molybdenum deposits in East Qinling and their significance[J].Chinese Journal of Geochemistry,1995,14(4):313-322. |
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| Authors: | Dianhao Huang Chengyu Wu Andao Du Hongliao He |
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| Institution: | (1) Institute of Mineral Deposits, Chinese Academy of Geological Sciences, 100037 Beijing;(2) Institute of Rock and Mineral Analysis, Chinese Academy of Geological Sciences, 100037 Beijing |
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| Abstract: | Dating of metallic ore deposits has been one of the problems concerned with by ore geologists for many years. The establishment
of the Re-Os Isotope Laboratory at the Institute of Rock and Mineral Analysis, Chinese Academy of Geological Sciences, has
provided us with a new technique to carry out geochronological studies of molybdenum ores. As one of the most important Re-bearing
minerals, molybdenite contains almost no common osmium, but187Os was derived completely from decay of187Re, with187Os content as the function of Re content in the mineral. An ID-ICP-MS technique has been used in this study, and Re-Os isotopic
ages of several large molybdenum deposits of different types from the East Qinling molybdenum belt have been determined. It
is indicated that the Huanglongpu carbonatite vein-type molybdenum-(lead) deposit has a Re-Os age corresponding to Indosinian,
while the rest porphyry-type molybdenum deposits and porphyry-skarn-type molybdenum-(tungsten) deposits have Re-Os ages corresponding
to Yenshanian.
This project was jointly supported by the National Natural Science Foundation of China (No.49173164) and the Geological Profession
Foundation, and also supported by the A-type finance of the Ministry of Personnel Affairs. |
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| Keywords: | molybdenum deposit 187Re and187Os isotopes Re-Os age East Qinling |
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