| 华南花岗岩中铀活化转移的地球化学证据 |
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| 引用本文： | 章邦桐.华南花岗岩中铀活化转移的地球化学证据[J].地球化学,1994,23(2):161-167. |
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| 作者姓名： | 章邦桐 |
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| 作者单位： | 南京大学 |
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| 摘 要： | 采用诱发裂变径迹法研究，发现华南产铀花岗岩副矿物中的铀沿微裂隙活化转移和交代蚀变矿物的自洁作用迫使载体矿物中的铀活化再分配的地球化学现象。与经过０．０５ｍＨＣ１溶液浸泡的花岗样品进行第二次诱发裂变径迹照射结果对比，确认为活化铀的存在，并具有易转移的特点。蚀变轩上岩取订及铅同位素组成研究提供了铀在热液蚀变过程中活化转移的佐证。γ能谱测量结果证实，花岗岩中的部分铀在风化作用过程中已活化转移而钍则基本存
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| 关 键 词： | 花岗岩 铀 活化转移 地球化学 |
GEOCHEMICAL EVIDENCE FOR URANIUM MOBILIZATION AND MIGRATION IN GRANITES FROM SOUTH CHINA |
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| Zhang Bangtong.GEOCHEMICAL EVIDENCE FOR URANIUM MOBILIZATION AND MIGRATION IN GRANITES FROM SOUTH CHINA[J].Geochimica,1994,23(2):161-167. |
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| Authors: | Zhang Bangtong |
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| Abstract: | Using induced fission-track method, mobilization and redistribution of uranium in carrier minerals were discovered to be driven by mobilization and migration of uranium in accessory minerals of U-producing granites along microfissures and the self-purification of hydrothermal alteration. The presence and migration of mobile uranium in granites are identified through comparison of the results of secondary induced fission-tracks of the initial rock and samples that was soaked in a 0.05m HCI solution. This is favored by the extraction rate of hydrothermally altered wallrocks and the composition of lead isotopes. It is shown, based on the measurement of gamma spectrum, that part of uranium may be migrated, with thorium remaining in situ, during the weathering of granite. |
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| Keywords: | South China granite mobilization and migration mobile uranium uranium mobilization coefficient |
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