|
|||||
|
|
| GEOCHEMICAL CHARACTERISTICS OF GRANITES AND ITS STRUCTURAL GENETIC ENVIRONMENT IN THE NANDAN-HECHI METALLOGENETIC BELT, NORTHWEST GUANGXI | |
| 作者姓名： | GUANGXI CAI Minghai LIANG Ting WU Decheng and HUANG Huimin * |
| 作者单位： | 1. Yichang Institute of Geology and Minerals，Yichang，Hubei 443003，China; 2. Liuzhou Huaxi Co. Ltd.，Liuzhou，Guangxi 545006，China; 3. Department of Geology and Mineral Resources，Chang’an University，Xi’an，Shanxi 710054，China |
| 摘 要： | The Nandan-Hechi metallogenetic belt is the most important tin-polymetallic producing district in China, and is the location of the Dachang super-large tin deposit. Based on the detailed field investigation and isotopic data, the stages of magmatic activity in the Nandan-Hechi metallogenetic belt have been lined out in this paper. Through the study about the geochemical characteristics of different granites, and by using ω(Al2O3)-ω(SiO2), ω(TFeO)/ω(TFeO) ω(MgO)]-ω(SiO2), AFM, ACF and Rb-Yb Ta, Rb-Y Nb,Ta-Yb, Nb-Y discrimination diagrams in combination with regional geological setting analysis, the authors carried out analyses about the structural environment for the formation of the granites, and discussed the structural environment and dynamic setting for the large scale mineralization in this area. Our study indicates that the majority of the granites in Nandan-Hechi metallogenetic belt belong to the POG type,while the later stage alaskite belongs to the RRG CEUG type. The granites were formed at the stage of structural transformation from postorogenic phase to intraplate setting. But the major structural environment is characterized by steady regional extension. The formation age for the granites coincides with the time for this transformation, and this translation environment is favored for large-scale metallogenesis. |
GEOCHEMICAL CHARACTERISTICS OF GRANITES AND ITS STRUCTURAL GENETIC ENVIRONMENT IN THE NANDAN-HECHI METALLOGENETIC BELT, NORTHWEST GUANGXI |
|
| CAI Minghai,LIANG Ting,WU Decheng,HUANG Huimin.GEOCHEMICAL CHARACTERISTICS OF GRANITES AND ITS STRUCTURAL GENETIC ENVIRONMENT IN THE NANDAN-HECHI METALLOGENETIC BELT, NORTHWEST GUANGXI[J].Geotectonicaet Metallogenia,2004,28(2):128-141. | |
| Authors: | CAI Minghai LIANG Ting WU Decheng HUANG Huimin |
| Institution: | 1. Yichang Institute of Geology and Minerals, Yichang, Hubei,443003,China;Liuzhou Huaxi Co. Ltd., Liuzhou, Guangxi 545006,China 2. Department of Geology and Mineral Resources, Chang'an University, Xi'an, Shanxi,710054,China 3. Liuzhou Huaxi Co. Ltd., Liuzhou, Guangxi 545006,China |
| Abstract: | The Nandan-Hechi metallogenetic belt is the most important tin-polymetallic producing district in China, and is the location of the Dachang super-large tin deposit. Based on the detailed field investigation and isotopic data, the stages of magmatic activity in the Nandan-Hechi metallogenetic belt have been lined out in this paper. Through the study about the geochemical characteristics of different granites, and by using ω(Al2O3)-ω(SiO2), ω(TFeO)/ω(TFeO)+ω(MgO)]-ω(SiO2), AFM, ACF and Rb-Yb+Ta, Rb-Y+Nb,Ta-Yb, Nb-Y discrimination diagrams in combination with regional geological setting analysis, the authors carried out analyses about the structural environment for the formation of the granites, and discussed the structural environment and dynamic setting for the large scale mineralization in this area. Our study indicates that the majority of the granites in Nandan-Hechi metallogenetic belt belong to the POG type,while the later stage alaskite belongs to the RRG+CEUG type. The granites were formed at the stage of structural transformation from postorogenic phase to intraplate setting. But the major structural environment is characterized by steady regional extension. The formation age for the granites coincides with the time for this transformation, and this translation environment is favored for large-scale metallogenesis. |
| Keywords: | granite geochemistry structural environment Nandan-Hechi metallogenetic belt northwest Guangxi |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |