| 甘肃走廊及其两侧活化区构造活动与铀矿化作用 |
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| 引用本文：.1985.The tectonic activity and uranium mineralization in Gansu corridor and its activated flank areas[J].Mineral Deposits,4(2):41~50 |
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| The tectonic activity and uranium mineralization in Gansu corridor and its activated flank areas |
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| Abstract:According to the diwa(geodepression) theory and also the concept of reflex activated regions by A.D. Shcheglor, the activation history ot the investigated regions, i. e., the southwestern margin of Alxa old land, the northern Qilianshan and the Gangsu corridor regions, is divided into three periods: 1) reflex activation period during S-D on the southwestern margin of Alxa old land; 2)reflex activation period during P-T in all regions; 3)the diwa (geodepression) period. Reflex activation during S-D on the southwestern margin of Alxa old land was mainly tectono-magmatic activation. Reflex activation during P-T in the Qilianshan and Gangsu corridor regions included reflex tectono-magmatic activation and tectonic-basin activation. The diwa (geodepression) belongs to the “Middle-Asia type” geodepression or mainly tectonic-basin activation. Related to activation characteristics, there are following characteristics of uranium mineralization in these regions: 1)Hydrothermal uranium mineralization were mainly formed during S-D reflex tectono-magmatic activation period in the southwestern margin of Alxa; of them the hydrothermal alkali(sodium) metasomatic type mineralization is of the most important significance. The process of uranium mineralization lasted for a long time. The discovered uranium mineralization are related to granites of the activation period; 2) There are hydrothermal uranium mineralization, and also epigenetic uranium mineralization formed during the P-T reflex activation period in Qilianshan and Gansu corridor,3)Different epigene and epigenetic uranium mineralizations were mainly developed in the diwa(geodepression)period. At the end of the paper, based on a summary of the relation between activation characteristics and uranium mineralization in these regions, combined with a further correlation with activation characteristics and uranium mineralization of Southeast China’s Diwa Regions, the influence of tectonic activities in activated regions upon the uranium mineralization is discussed. |
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