浙江花岗岩的交代作用研究(英文)

Metasomatic Alteration of Granitic Rocks in Zhejiang Province of China

用岩相学方法研究浙江花岗岩的交代作用。浙江花岗岩的主要交代过程包括交代引起的碱性化,如绢云母化、微斜长石化和硅化。斜长石的绢云母化大量发生在低温低压条件区域,随热液进入,带入了过量水、K、Al和Si。在交代作用后期,更多的花岗岩形成,这些花岗岩可再熔化,熔化后又会凝固并被交代流体作用。

Metasomatism of the granitic rocks in Zhejiang Province, China is investigated by petrography. The meta-somatic processes predominating in the granitic rocks in Zhejiang Province include alkali enrichment caused by metasomatism, i.e. seriatization, microclirization, and silicification. Sericitization of plagioclase occurs on a large scale in the area at low temperature-pressure conditions, and additional water, K, Al, and Si are brought in as a result of hydrothermal fluids entering. More granitic rocks are produced in the late-stage of metasomatism, which could be remelt, and each successive melt could be solidified and modified by metasomatic fluids.