| 北山花岗岩S型/I型空间变化规律及含矿性 |
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| 引用本文：杨合群,李英,李文明,杨建国,赵国斌,王小红.2009.北山花岗岩S型/I型空间变化规律及含矿性[J].地球学报,30(5):627-633. |
| DOI：10.3975/cagsb.2009.05.08 |
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| 基金项目:国土资源大调查项目(1212010531602 ; 1212010813036)资助 |
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| 中文摘要:北山地区花岗岩十分发育, 出露面积接近总面积的30%, 形成时代以华力西期为主, 约占80%以上。笔者根据岩石化学判别统计, 本区花岗岩的S型/I型个数比例, 北带0.33, 中带0.54, 南带0.59, 说明从北向南, I型花岗岩逐渐减少, S型花岗岩逐渐增多。区内花岗岩类为重要的含矿岩石, 其中典型斑岩铜矿床与I型花岗质斑岩有关, 当出现铜铅组合时则与S型花岗质斑岩有关; 钼矿床有关花岗岩一般属I型, 当出现钨钼组合时则向S型花岗岩过渡; 钨锡矿床主要与S型花岗岩有关; 金矿床有关的花岗岩既有I型, 也有S型, 专属性不明显。 |
| 中文关键词:北山 花岗岩 I型 S型 含矿性 |
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| Spatial Variation Regularity and Ore Potential of S-type and I-type Granites in the Beishan Mountain |
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| Abstract:Granites are well developed in Beishan area, with the outcrop making up nearly 30% of the total area. Over 80% of the granites were formed in the Variscan epoch. According to petrochemical discrimination, the ratio of S-type to I-type granites is 0.33 in the north belt, 0.54 in the middle belt and 0.59 in the south belt respectively. From north to south, the I-type granite gradually decreases whereas the S-type granite increases. The granites in this area constitute important ore-bearing rocks. The typical porphyry Cu deposits are related to the I-type granitic porphyry, and the Cu-Pb combination has to do with the S-type granitic porphyry. The Mo deposits are associated with the I-type granite, which grades off into the S-type granite when the W-Mo combination appears. The W-Sn deposits are mainly linked with the S-type granite. The granites related to gold deposits are S-type and I-type ones, with indistinct specialization. |
| keywords:Beishan granite S-type granite I-type granite ore potential |
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