| Isotopic Characteristics and Key Factors Favoring the Formation of Fuwan Super-large Silver Deposit in Guangdong Province |
| |
| 作者姓名： | 梁华英 喻亨祥 夏萍 王秀璋 程景平 |
| |
| 作者单位： | [1]LaboratoryofMarginalSeaGeology,GuangzhouInstituteofGeochemistry＆SouthChinaSeaInstituteofOceanology,ChineseAcademyofSciences,Wushan,Guangzhou510640,China [2]GuilinInstituteofTechnology,Guilin541004,China |
| |
| 基金项目： | theNSFC (No . 4 9872 0 35 ),theMajorStateBasicResearchProgramofP .R .China (No .19990 4 32 0 3) ,andtheimportantprojectsundertheKnowledge InnovationProgramofCAS (No .KZCXZ SW 117andNo .GIGCX 0 3 0 4 ) |
| |
| 摘 要： | Rb-Sr isochron age of fluid inclusions in quartz from the Fuwan super-large silver deposit is 68 - 6 Ma, the silver deposit is characterized by high μ values (10.67 - 10.95 ), which are much higher than those of the ore-hosted Paleozoic strata and are close to those of ores hosted in the Proterozoic metamorphic basement in western Guangdong Province. Based on the Pb isotopic characteristics, coupled with much high background silver contents (200-1000ng/g) in the Proterozoic basement and relatively low silver contents in the Paleozoic strata in the region of the Sanshui Basin, it is concluded that the ore-forming material of the super-large silver deposit came mainly from the old basement. The super-large silver deposit related genetically to the intense volcanic activities during the Upper Cretaceous to Eogene. The formation of the Fuwan super-large silver deposit is controlled by the following favorable geological conditions : ( 1 ) The intersection of deep faults and contemporaneous faults at the margin of the Sanshui Basin led to the formation of an excellent structure as passageway for ore fluids; (2) The special ore-hosted rock association forms a ore gathering-trap structure that favors the precipitation of ore; (3) The silver-rich old basement, multi-stage mineralization and multi-episode volcanic activities which constitute a geothermal convection system.
|
| 关 键 词： | 银矿 矿源 广东 沉积矿 同位素组成 |
| 收稿时间： | 26 May 2003 |
Isotopic characteristics and key factors favoring the formation of Fuwan super-large silver deposit in Guangdong Province |
| |
| Liang Huaying,Yu Hengxiang,Xia Ping,Wang Xiuzhang,Cheng Jingping.Isotopic Characteristics and Key Factors Favoring the Formation of Fuwan Super-large Silver Deposit in Guangdong Province[J].Chinese Journal of Geochemistry,2004,23(4):293-300. |
| |
| Authors: | Liang Huaying Yu Hengxiang Xia Ping Wang Xiuzhang Cheng Jingping |
| |
| Institution: | (1) Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry & South China Sea Institute of Oceanology, Chinese Academy of Sciences, 510640 Wushan, Guangzhou, China;(2) Guilin Institute of Technology, 541004 Guilin, China |
| |
| Abstract: | Rb−Sr isochron age of fluid inclusions in quartz from the Fuwan super-large silver deposit is 68±6 Ma, the silver deposit
is characterized by high μ values (10.67–10.95), which are much higher than those of the ore-hosted Paleozoic strata and are
close to those of ores hosted in the Proterozoic metamorphic basement in western Guangdong Province. Based on the Pb isotopic
characteristics, coupled with much high background silver contents (200–1000 ng/g) in the Proterozoic basement and relatively
low silver contents in the Paleozoic strata in the region of the Sanshui Basin, it is concluded that the ore-forming material
of the super-large silver deposit came mainly from the old basement. The super-large silver deposit related genetically to
the intense volcanic activities during the Upper Cretaceous to Eogene. The formation of the Fuwan super-large silver deposit
is controlled by the following favorable geological conditions: (1) The intersection of deep faults and contemporaneous faults
at the margin of the Sanshui Basin led to the formation of an excellent structure as passageway for ore fluids; (2) The special
ore-hosted rock association forms a ore gathering-trap structure that favors the precipitation of ore; (3) The silver-rich
old basement, multi-stage mineralization and multi-episode volcanic activities which constitute a geothermal convection system.
The work was supported by the NSFC (No. 49872035), the Major State Basic Research Program of P. R. China (No. 1999043203),
and the important projects under the Knowledge-Innovation Program of CAS (No. KZCXZ-SW-117 and No. GIGCX-03-04). |
| |
| Keywords: | silver ore ore genesis Fuwan Guangdong Province |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ |
|
