浙江衢州大洲火山断陷盆地构造应力场特征及其与铀成矿关系  

Tectonic Stress Field's Characteristic and Its Relationship of Uranium Mineralization at Dazhou Volcanic Faulted Basin in Quzhou, Zhejiang Province

作　　者：惠小朝[1,2] 韩效忠[1,2] 林建平[3] 王明太[1,2] 张斌[1,2] 汤江伟 杜江浩 金淼张 雷遥明 

机构地区：[1]核工业北京地质研究院,北京100029 [2]中核集团铀资源勘查与评价技术重点实验室,北京100029 [3]中国地质大学,北京100083 [4]浙江省核工业269大队,浙江金华321000 [5]中核浙江衢州铀业有限责任公司,浙江衢州324002

出　　处：《地质学报》2012年第2期228-240,共13页Acta Geologica Sinica

基　　金：工业和信息化部核能开发三期"衢州地区铀成矿预测技术研究"项目(编号H061)资助的成果

摘　　要：在构造变形研究的基础上,通过野外露头共轭剪节理的产状测量,采用数学统计方法进行分期配套,并结合前人的研究成果,开展了大洲火山断陷盆地古构造应力场及其与铀成矿关系的研究。总结了主要经历的四期构造应力:前晚侏罗世构造期、磨石山期、衢江期、始新世—渐新世构造期,分别讨论了各个期次对铀成矿的控制作用,指出后三个构造期与铀成矿关系密切,即磨石山期构造应力场为成矿准备了储矿空间,衢江期构造应力场为成矿准备了导矿空间,而始新世—渐新世构造期构造应力场对已形成矿体进行了破坏或改造。Based on the study of the structural deformation, the occurrence measurement of outcropped conjugate shear joints, and previous research results, the paleo-tectonic stress field of the Dazhou volcanic faulting basin and its relationship to uranium mineralization was studied using mathematical statistics. Four stages of tectonic stress undergone are summarized： pre-Late Jurassic tectonic stage, Moshishan stage, Qujiang stage, and Eocene-Oligocene tectonic stage. And controlling of each stage over uranium mineralization is also discussed. Finally, this study suggests that late three tectonic stages have close relation to the uranium mineralization, i.e. the Moshishan tectonic stress field provided space for mineralization, the Qujiang stage provided conduits, and Eocene-Oligocene tectonic stress destroyed or reformed previously-formed orebodies.

关 键 词：火山断陷盆地 构造应力场 剪节理 铀成矿 衢州地区 

分 类 号：P619.14[天文地球—矿床学]