Characteristic and essence of rubefication in wall rock alteration of Anjiayingzi gold deposit in Harqin banner, Inner Mongolia
文献类型：期刊论文
| 作者 | Zhang Yu1,2; Li YongGang1; Li Fei3; Zhang HongTao3; Chong SongShu3 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2014-02-01 |
| 卷号 | 30期号:2页码:576-588 |
| 关键词 | Rubefication Microscopic pore Pure rim Anjiayingzi Chifeng-Chaoyang gold belt |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The widespread rubefication in the wall rock alteration of the Anjiayingzi gold deposit was considered to be potassic alteration. Rubefication is a not effective clue for prespecting. However, through geologic studies in the field and microscopic morphology and optics as well as EPMA, SEM, major elements in laboratory, it is found that rubefication is mainly caused by a assembly of sericite, albite, epidote, Fe-oxide and bits of potassium feldspar presenting in plagioclase, not separate potassic alteration. The early Na-bearing fluid through microscopic pores reacted with plagioclase to form albite, releasing Al and Ca, and then combined other component in fluid to form sericite and epidote. As the reaction proceeded, a lot of sericite appear, which leds to increase a(K+)/a(H+), then form K-feldspar to constitute the assembly of albite, sericite, epidote and K-feldspar. During this process, iron in plagioclase or mica is released, then precipitate in the pores of plagioclase in the form of oxides, which turned the granite to red. In the weak altered zone, rubefication only appears in the core of plagioclase, which forms pure rim. This is controlled by the distribution of microscopic pores. During crystallization of plagioclase, the speed of formation the core is too fast, so it is able to capture the melt or fluid to form microscopic pores, conversely, the growth rate of the rim is relatively slow, almost no pore appears. These pores directly control the distribution of alteration. Since microscopic pores are distributed in core of plagioclase, so the rubefication is located in the core, and the rim keeps fresh. Based on the results of analyzing, the rubefication is not a solo potash feldspathization. The essence of rubefication was a complex action between plagioclase and fluid. The distribution of this alteration is very common in granite, and not necessarily related to the mineralization. Its distribution is limited, with less material exchange with fluid, so makes little sense to prospecting and mineralization. |
| WOS关键词 | NORTH CHINA CRATON ; ORE-FORMING FLUIDS ; REPUBLIC-OF-CHINA ; REPLACEMENT REACTIONS ; ALKALI FELDSPARS ; GRANITIC-ROCKS ; PLAGIOCLASE ; MINERALIZATION ; ALBITIZATION ; MICROPORES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000333224500019 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84856]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang Yu |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chifeng Jinchan Min Co Ltd, Chifeng 024416, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Yu,Li YongGang,Li Fei,et al. Characteristic and essence of rubefication in wall rock alteration of Anjiayingzi gold deposit in Harqin banner, Inner Mongolia[J]. ACTA PETROLOGICA SINICA,2014,30(2):576-588. |
| APA | Zhang Yu,Li YongGang,Li Fei,Zhang HongTao,&Chong SongShu.(2014).Characteristic and essence of rubefication in wall rock alteration of Anjiayingzi gold deposit in Harqin banner, Inner Mongolia.ACTA PETROLOGICA SINICA,30(2),576-588. |
| MLA | Zhang Yu,et al."Characteristic and essence of rubefication in wall rock alteration of Anjiayingzi gold deposit in Harqin banner, Inner Mongolia".ACTA PETROLOGICA SINICA 30.2(2014):576-588. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。