摘要
松辽盆地周围沸石资源丰富 ,矿床类型多样 ,是中国东部环太平洋沸石成矿带的重要组成部分。研究区NE—NNE向深大断裂带控制着中生代火山岩和沸石矿带的空间展布 ,而不同方向深大断裂带的交接复合地段则决定了沸石矿田和主要矿床的空间定位。燕山中晚期以挤压-剪切 (左行 )为主的构造动力学机制控制了富碱高钾火山岩的发育 ,为沸石矿源岩的形成期 ;喜山期的构造反转以拉张 -剪切 (右行 )为主的构造动力学机制及其相伴的岩浆热事件 ,导致区域地热异常、地下流体增温和沸石矿化作用的快速进行。研究区中生代火山岩系中沸石矿床的主成矿期为喜山期 (6 4 5～ 5 5 0Ma)。
There are abound zeolite resources and various types of zeolite ore deposits around the Songliao Basin which are the important constitutions of zeolite metallogenic belt around the Pacific Ocean in east China. In the study area, the Mesozoic volcanic rocks and zeolite ore belts are controlled by the NE-NNE trending deep fracture zones. Zeolite ore fields and major ore deposits are located in cross compounding regions of deep fracture zones of different trends. The alkine and K rich volcanic rocks, which are source rocks of zeolite ores, formed in middle late Yanshanian stage, with tectonic dynamic mechanism of compression and left lateral shearing. Tectonic reversion occurred in Himalayan stage, with tectonic dynamic mechanism of extension and right lateral shearing and accompaning magmatic activities. It led to geothermal anomaly occurring, temperature of subsurface fluid rising and zeolite mineralizing. The metallogenetic epoch of zeolite deposits hosted in the Mesozoic volcanic rocks in the study area is the Cenozoic era, with ages from 64 50 to 5 50 Ma.
出处
《现代地质》
CAS
CSCD
2001年第4期399-404,共6页
Geoscience
基金
国土资源部非传统矿产资源开放研究实验室基金项目 ( 2 0 0 10 4)
国土资源部重点项目"新型矿产资源评价研究"。
