冈底斯火山—岩浆弧中段邦多地区火山构造特征

Volcanic tectonic characteristics in Bangduo region in the central segment of Gangdisian volcanic magmatic arc

在冈底斯火山—岩浆弧中段的邦多地区,火山构造丰富多彩,且独具特色。根据区域构造背景、火山岩地层时空分布特征、岩性、岩相及喷发形式,将研究区划分为三个火山喷发带,其中宁果—措麦火山喷发带又可划分为宁果和德诺两个火山构造洼地,卢当—查孜火山喷发带划分为孔隆—邦勒、松拉勒—腊尔格和孔驹密波—查孜三个火山喷发亚带。研究区共圈定火山机构62处。文章较全面地阐述了各级火山构造的基本特征,总结了各自的分布规律和产出状态,为在整个冈底斯地区开展火山岩地质及矿产调研,奠定了扎实的基础。

Volcanic structures are diverse and complex with extraordinary feature in Bangduo region in the central sector of Gangdisian volcanic magmatic arc. It is divided into three volcanic eruptive belts based on regional tectonic setting and space - time distributed characteristics of volcanic rocks strata and lithological character and litho facies, as well as eruptive pattern in the research area. Volcanic eruptive belts from Ningguo to Cuomai is divided into two volcanic tectonic depression including Ningguo and Deruo. Volcanic eruptive belts from Ludang to Chazi is divided into three volcanic eruptive subzones along with Konglong-Banglei and Songlalei-Laerge and Kongjumibo-Chazi. 62 volcanic apparatuses are established in the research area. This article expatiates basic features of various scale of volcanic structure, summarizes its regularities of distribution and occurrence and settles steady foundation for geological investigation of volcanic rocks and the deposits in the whole Gangdisian region.