宽成分谱系岩墙群的岩石成因及其构造与成矿意义  

The wide composition spectrum dike swarm(WSDS): Petrogenesis and its tectonic and metallogenic implications

作　　者：黑慧欣 罗照华[1] 李德东[1] 潘颖[1] 杨宗锋[1] 周久龙[1] 

机构地区：[1]中国地质大学地质过程与矿产资源国家重点实验室,北京100083

出　　处：《地质通报》2015年第2期229-229,230-250,共22页Geological Bulletin of China

基　　金：科技部深部探测技术与实验研究专项(编号:200699105-1);国家自然科学基金项目(批准号:90814007;40434010)

摘　　要：在综述国际上为数不多的宽谱系岩墙群(WSDS)研究实例的基础上,以太行山板内造山带中的岩基后岩墙群为例,详细论证了WSDS的形成机制,并简要讨论其构造与成矿意义。研究认为,1WSDS是一类非常特殊的岩石组合,其岩石组成的多样性主要取决于岩浆起源,因而不同于已知的其他火成岩组合;2WSDS直接的构造指向是造山带岩石圈拆沉作用;3WSDS的产生必须有大规模流体活动的参与,因而是成矿作用的指示器;4岩浆系统是一种复杂性动力系统。在理想系统的框架下,由WSDS识别出的许多成因信息是相矛盾的。但是,在复杂系统的框架下,这些信息可以得到整合解释;5板内造山作用是一种特殊类型的造山作用,与板缘构造力没有直接的联系。WSDS同样适用于板内与板缘2种造山类型,具有普适性,都与岩石圈加厚拆沉有关。This paper tries to review dike swarms less reported in the world and describe their tectonic and metallogenic implications, defining them as the wide spectrum dike swarms （WSDS）. On such a basis, the authors have reached some conclusions：①the WSDS is a specific igneous suite, whose compositional diversity is induced mainly by its origin. Thus the WSDS differs from the other known igneous suites;②the WSDS＇s direct tectonic meaning is the lithosphere delamination;③Because the producing process of the WSDS needs the active involvement of the deep fluids, the WSDS is the targeting criterion in search for ore deposits;④the magma system is a complex dynamic system. Under the framework of ideal system, many signatures recognized from the WSDS are contra-dicted. However, these signatures can be integrated under the framework of the complex system;⑤the intraplate orogen is a specific type of orogen. The orogenesis can not be directly related to the tectonic force from the plate boundaries. WSDS applies equally to intraplate orogen and plate boundary orogen.

关 键 词：宽谱系岩墙群 岩浆起源 构造热体制 成矿作用 

分 类 号：P58[天文地球—岩石学] P588.11[天文地球—地质学]