华北中生代火山作用:对克拉通破坏深部过程和浅部响应的制约  

Mesozoic Volcanism in the North China Craton:Constraints for the Deep Processes and Shallow Responses of the Cratonic Destruction

作　　者：马强[1,2] 郭建芳 徐义刚 郑建平 MA Qiang;GUO Jian-fang;XU Yi-gang;ZHENG Jian-ping(School of Earth Sciences,State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences(Wuhan),Wuhan 430074,China;Southern Marine Science and Engineering Guangdong Laboratory,Guangzhou 511458,China;State Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China)

机构地区：[1]中国地质大学(武汉)地球科学学院,地质过程与矿产资源国家重点实验室,武汉430074 [2]南方海洋科学与工程广东省实验室,广州511458 [3]中国科学院广州地球化学研究所,同位素地球化学国家重点实验室,广州510640

出　　处：《矿物岩石地球化学通报》2022年第4期776-787,I0003,共13页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(41973050,42288201);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项项目(GML2019ZD0202)。

摘　　要：强烈的晚中生代火山活动是华北克拉通破坏的重要表现形式之一。本文对华北中生代火山作用的时空分布、不同时空背景下火山岩的性质与岩浆起源进行了综述,讨论了火山作用与克拉通破坏深部动力学过程和浅表系统之间的联系,主要认识包括:(1)华北中生代时期经历了5期火山活动,其中中晚侏罗世和早白垩世火山活动最为强烈,与克拉通破坏过程关系最为密切;(2)中晚侏罗世火山活动自海沟向内陆迁移,岩石组合、化学成分和同位素组成较为均一,是古太平洋板块平板俯冲前端位置上覆的古老大陆地壳和岩石圈地幔部分熔融的产物;早白垩世火山活动自内陆向海沟回迁,岩石组合、化学成分和同位素组成表现出较大的时空不均一性,是古太平洋板块回转后撤与东亚大地幔楔形成过程中地幔楔与上覆岩石圈强烈相互作用造成深部岩石圈广泛部分熔融的结果;(3)华北中生代火山作用是联系克拉通破坏深部过程与陆地生物群演化的关键纽带,火山活动的空间差异性及成因、环境气候效应是未来值得关注的问题。The intensive late Mesozoic volcanic activity is one of the important forms of destruction of the North China Craton.In this paper,we have comprehensively reviewed the temporal and spatial distribution of Mesozoic volcanism,properties and magmatic origins of the Mesozoic volcanic rocks under different temporal and spatial backgrounds in the North China Craton,and further have discussed the link between the volcanism and cratonic destruction in deep dynamic processes and superficial systems.Key points of this review are given below:(1)There are five stages of volcanisms,in which the middle-late Jurassic and early Cretaceous volcanisms were most widely and vigorously developed and were most closely related to the cratonic destruction process;(2)The middle and late Jurassic volcanisms had migrated to inland from the trench,and those volcanic rocks which have relatively uniformed rock assemblages,chemical compositions and isotopic compositions were products of partial melting of the old continental crust and lithospheric mantle overlying on the front of the flatly subducted ancient Pacific plate.However,the early Cretaceous volcanisms had migrated to the trench from inland,and those volcanic rocks which have relatively large temporal and spatial heterogeneities in rock assemblages,chemical compositions and isotopic compositions were products of extensive partial melting of the deep lithospheric mantle resulted from the intensive interaction between the mantle wedge and the overlying lithospheric mantle in processes of the rotation and retracement of the ancient Pacific plate and the formation of the East Asian great mantle wedge;(3)The Mesozoic volcanism in the North China is a key link between the deep process of the cratonic destruction and the evolution of terrestrial biotas.The spatial differences and origins of volcanic activities,as well as the environmental and climatic effects,should be paid attention to in the future.

关 键 词：火山作用 华北克拉通破坏 古太平洋板块俯冲 陆地生物群 

分 类 号：P317.2[天文地球—固体地球物理学]