| 王卫星.河南嵩县地区石英斑岩地质与地球化学特征研究[J].地质与勘探,2010,46(2): |
| 河南嵩县地区石英斑岩地质与地球化学特征研究 |
| Study on the Geological and Geochemical Characteristics of QuartzPorphyry in Song County, Henan Province |
| 投稿时间：2009-10-08 修订日期：2010-03-18 |
| DOI： |
| 中文关键词: 河南嵩县 熊耳山 金矿床 石英斑岩 |
| 英文关键词: Song County, Henan Province,Xiong'er Shan,gold deposit,quartz porphyry |
| 基金项目:国家重点基础研究发展计划(973 计划)(编号2002CG412607)资助 |
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| 中文摘要: |
| [摘要]河南嵩县位于豫西熊耳山地区,区域内金矿床分布众多,发育地层以太古界太华群和中
元古界熊耳群为主,岩石变质较深,构造变动强烈,岩浆活动频繁,燕山期大量中酸性岩浆侵入伴生了大
量典型的小斑岩体,如石英斑岩。本文通过对研究区内石英斑岩的野外地质观察和室内化学分析研究
认为:淤石英斑岩相对于区内燕山期花岗岩体更偏酸性,TiO2 、P2 O5 、MnO 平均含量相对于区内燕山期
花岗岩偏低;岩石富碱富钾质,属于钙碱性岩石系列,分离结晶作用进行的比较彻底,岩体形成时的氧逸
度较高;据CIPW 计算石英斑岩标准矿物主要矿物为石英、钠长石、钙长石、正长石,副矿物为透辉石、刚
玉、紫苏辉石、钛铁矿、磁铁矿、磷辉石等,刚玉含量普遍相对较高;于石英斑岩Au 含量相对于区域内太
华群和熊耳群地层,以及区内五丈山、花山、合峪三大花岗岩体Au 含量大大富集;与原始地幔相比具有
强烈富集强不相容元素、弱不相容元素富集相对较弱;盂雷门沟石英斑岩与区域内花山岩体各稀土元素
含量及稀土元素各类特征参数非常接近,其它地区石英斑岩稀土总量较低,轻重稀土分馏不是很明显,
除店房矿区的石英斑岩具有较明显的Eu 正异常外,其它地区基本无Eu 和Ce 异常。 |
| 英文摘要: |
| Abstract:Song county, situated in the Xiong'er Shan Mountains, western Henan province, is rich in gold deposits. In geology this area is of Neo鄄
archean Taihua Group and Mesoproterozoic Xiong忆er Group strata, with high-grade metamorphism, intense tectonic movements, and frequent magmatic
activities. During the Yanshan period, much intermediate-acid intrusive magma produced associated typical small ore-bearing porphyries, such as quartz
porphyry. Based on the field geological observations and indoor chemical analysis on quartz porphyry from the study area, we derive the following conclu鄄
sions. 淤Compared with granite in this area, quartz porphyry is more acidic, and the average contents of TiO2 、P2 O5 、MnO are relatively low. The rock is
Alkali-rich and potassic-rich, belonging to caic-alkaline series with complete fractional crystallization and high oxygen fugacity during rocks爷formula鄄
tion. According to the computation of CIPW, the standard minerals of quartz porphyry are quartz , albite. anorthite and orthoclase. The accessory miner鄄
als are diopside, corundum, hypersthene、ilmenite, magnetite ores, and apatite. While generally the content of corundum is comparatively higher than
others. 于The content of Au is higher than that of the strata of the Taihua Group and Xiong忆er Group in the study area, as well as the three granite rock
mass of Wuzhangshan, Huashan and Heyu. In comparison with primitive mantle, quartz porphyry enriches in more highly incompatible elements than
weakly incompatible elements. 盂The content of each REE and each feature parameters of REE of quartz porphyry in Leimengou are very similar to the
granite rock of Huashan in this area, and 撞REE of quartz porphyry in other area is low, and the fractionation of LREE and HREE is not very obvious.
Generally there is no Eu and Ce anomaly in the study area, except for the obvious positive Eu anomaly in the Dianfang mining area. |
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