陆相火山岩区填图方法的实践——以浙江嵊州新生代玄武岩为例

发布时间：2018-05-13 05:44

本文选题：陆相火山岩 + 填图方法　；参考：《地质通报》2017年11期

【摘要】：从20世纪90年代以来,中国陆相火山岩区调查工作普遍采用"火山构造-火山岩相-火山岩性"三位一体的思路与工作方法。以浙江嵊州地区1∶5万区域地质调查工作为例,探讨了该方法在大面积新生代玄武岩区中的应用。系统的野外调查及研究显示,在新生代玄武岩区,遥感技术及新的影像图是火山岩区填图的关键,图像解译-野外验证的反复实践,是提高填图效果和质量的有效方法。在野外,特殊的地貌、爆发相的集块角砾岩及火山颈相的玄武玢岩往往指示了火山机构的中心;火山岩相、喷发间断是划分火山旋回的关键。火山机构、火山岩相、火山岩性的时间-空间变化是恢复古火山喷发历史的关键手段。
[Abstract]:Since 1990s, the investigation of continental volcanic rocks in China has generally adopted the idea and working method of "volcanic tectonics - volcanic lithofacies - volcanic lithology". Taking the 1: 50 thousand regional geological survey in Shengzhou, Zhejiang as an example, the application of this method in the large area Cenozoic basaltic area is discussed. The study shows that in the Cenozoic basaltic area, remote sensing and new images are the key to the mapping of volcanic rocks. The repeated practice of image interpretation and field verification is an effective method to improve the effect and quality of the mapping. In the field, the special geomorphology, the eruption phase of the breccia and the basaltic porphyrite of the volcanic necks often indicate the volcano The center, volcanic facies and eruption discontinuity are the key to the division of volcanic cycle. The volcanic lithofacies and the time space change of volcanic lithology are the key means to restore the history of the eruption of the paleo volcano.

【作者单位】：中国地质调查局南京地质调查中心;
【基金】：中国地质调查局项目《武夷山成矿带龙泉—上杭地区地质矿产调查》(编号:121201008000150002);《国家地质数据库建设与整合》(编号:DD20179384) 国家重点研发计划课题《东南沿海中生代巨型火山构造成因与成矿》(编号:2016YFC0600203)
【分类号】：P588.145;P623

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