| 徐兆文,杨荣勇,陆现彩,任启江.金堆城斑岩钼矿床地质地球化学特征及成因[J].地质找矿论丛,1998,(4):18-27 |
| 金堆城斑岩钼矿床地质地球化学特征及成因 |
| GEOLOGICAL GEOCHEMICAL-CHARACTERISTICS AND GENESIS OF THE JINDUICHENG PORPHYRY MOLYBDENUM DEPOSIT,SHANXI PROVINCE |
| 投稿时间：1998-08-30 修订日期：1998-10-12 |
| DOI：10.6053/j.issn.1001-1412.1998.4. 002 |
| 中文关键词: 斑岩钼矿床 地质地球化学 成因 陕西省金堆城 |
| 英文关键词:porphyry molybdenum deposit geochemical characteristics genesis Jinduicheng Shanxi Province |
| 基金项目:国家自然科学基金,南京大学内生金属矿床成矿机制研究国家重点实验室资助项目 |
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| 全文下载次数: 1901 |
| 中文摘要: |
| 金堆城斑岩钼矿是东秦岭超大型钼矿带内最重要钼矿床之一,该矿床的形成与中生代花岗斑岩有关,且岩体顶部发育了典型的钾长石-石英条纹岩。矿区内含脉率和裂隙发育程度可作为矿化强度的一个重要标志。成矿流体研究表明主要成矿阶段温度为200°C±;成矿流体含盐度具有双配分模式特征,盐度介于27.5～42.5w(NaCl)eq%和0.61～17w(NaCl)%两个区间之内;成矿流体成分以富Cl-、K+、SO42-、贫F-、Na+、HCO3-为特征。稳定同位素研究表明δ34S‰介于1.23～4.34之间;δ18O‰介于11.83～8.59之间,δD‰介于-57.22～-120.69之间;稳定同位素数值说明成矿热液早期以岩浆热液为主,晚期有雨水加入。 |
| 英文摘要: |
| Jinduicheng porphyry molybdenum deposit is one of the most important in the East Qinling Large molybdenum metallogenic belt.The porphyry molybdenum deposit is associated with a Mesozoic granite porphyry.There is potash feldspar quartz crenulate on the top of the granitc porphyry.In this paper,authors point out that the fissure abundances and developing degree of the fissure are important indicators of mineralization scale.The ore forming temperature is 200°C±.The salinity of mineralizing solutions manifests bimodal distribution pattern with two ranges from 27.5 to w(NaCl)eq 42.5% and from 0.61 to w(NaCl)eq 17% equiv.The composion of inclusion is characterized by rich in Cl-,K+,SO42- and poor F-,Na+,HCO3-.The data of sulphur,oxygen and hydrogen have δ34S range from 1.25 to 4.34‰,δ18O ranges from 11.83 to 8.59‰,δD ranges from -57.22 to -120.69‰.These isotopic data suggest that the ore forming fluids and materials were originated mainly from the magma system.But there entered meteoric water at late stage. |
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