摘要
浙江梧村岩体是一个主要由石英二长岩、二长岩组成的中生代复式岩体。通过详细的野外填图和地质地球化学研究,发现该岩体具有结构和成分演化序列。依据侵入体之间及其与围岩的接触关系、岩石的矿物成分及岩石地球化学、结构构造等特征,可将其划分为大山、沐尘、下坞等3个岩石单元,归并为梧村超单元。从早期到晚期,岩浆的侵入具有明显的反序特征,这种"反序"现象是因为存在带状岩浆房。三个单元在格局上呈刺破式同心带状型式,这种就位很可能属于刺穿式底辟作用。
The Wucun complex in Zhejiang Province is a Mesozoic complex, which is mainly composed of quartz monzonite and monzonite. Detiled field geological mapping and geological-geochemical study show that this complex displays a textural and compositional evolution sequence. According to the contract relation between the intrusive bodies and their wall-rocks, the intrusive rock＇s mineral and geochemical characters, the rock＇s texture and structure, the Wucun complex can be divided into three rock units （Dashan,Muchen and Xiawu unit ）,which are in corporated into a Wucun super-unit. From early to late, the magrnatic intrusion shows obvious reversed order, this ＇reverse＇ phenomenon is explained as the result of a zonal magma chamber. The three units take the shape of punctured concentric striatus in their layout, and this kind of emplacement may probably fall into the category of punctured diapir.
出处
《地质调查与研究》
2008年第4期302-308,352,共8页
Geological Survey and Research
基金
国家国土资源部地质大调查项目:1/25万嵊县幅区域地质调查(200013000124)
杭州城市地质调查(200413000021)
关键词
梧村超单元
地质特征
演化序列
带状岩浆房
就位机制
浙江省
Wucun super-unit
geological features
evolutionary series
zonal magma chamber
emplacement mechanism
Zhejiang Province
