白岗岩
碱长花岗岩的浅色变种。化学成分和碱长花岗岩相似，但二氧化硅含量近于75％，较花岗岩为高，属超酸性岩石。其特征是几乎不含深色矿物，全部由石英、碱性长石和酸性斜长石组成，可含少量的云母。具花岗结构。为浅色碱长花岗岩的同义词，与其有关的矿产主要是锡、钨、铌、钽等。据美国阿拉斯加地名命名。
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contributed at 2011-10-09
Classification(s)
●
Earth System(in Chinese) Igneous petrology
Detailed Description
| English |
|---|
| Name | alaskite |
| Chinese |
|---|
| Name | 白岗岩 |
| Description | 碱长花岗岩的浅色变种。化学成分和碱长花岗岩相似，但二氧化硅含量近于75％，较花岗岩为高，属超酸性岩石。其特征是几乎不含深色矿物，全部由石英、碱性长石和酸性斜长石组成，可含少量的云母。具花岗结构。为浅色碱长花岗岩的同义词，与其有关的矿产主要是锡、钨、铌、钽等。据美国阿拉斯加地名命名。 |
How to Cite
NNU_Group (2011). 白岗岩, Concept & Semantic, OpenGMS,
https://geomodeling.njnu.edu.cn/repository/concept/2b9263eb-6db4-45e8-ad6f-48651b47d7c2
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