陆相火山岩区岩性组合-岩相填图试验——以内蒙古西太仆寺破火山为例

发布时间：2018-06-18 13:24

本文选题：岩性组合 + 岩相　；参考：《地质通报》2017年11期

【摘要】：中国陆相火山岩区的填图方法半个多世纪以来几经反复,为了与传统的沉积岩区填图方法相区别,反映火山作用的特点,先后探索过双重填图法(即岩相-地层学填图方法)、火山构造-岩性岩相-火山地层填图法等,在局部地区取得过重要进展和成果。但在全国层面的实际填图工作中,没有摆脱将火山岩作为地层(组)的习惯性做法。探索和总结适合陆相火山岩区的填图方法体系,坚持推广反映火山作用特点的填图技术方法仍然是区调工作面临的重大问题。火山岩相是重溯火山作用过程、恢复古火山机构的基础,理应成为火山岩地质图所要表达的核心要素,而岩性组合是确定岩相类型最直接和最可靠的依据。利用岩性组合-岩相进行火山岩区填图能够很好地反映陆相火山作用的特点。
[Abstract]:The mapping method of continental volcanic rock area in China has been repeated several times for more than half a century. In order to distinguish it from the traditional mapping method of sedimentary rock area, it reflects the characteristics of volcanism. The dual mapping method (i.e. lithofacies stratigraphic mapping method, volcanic tectonics lithofacies mapping method, volcanic stratigraphic mapping method, etc.) has been explored successively, and important progress and achievements have been made in local areas. However, in the practical mapping work at the national level, the practice of using volcanic rocks as strata (formations) has not been eliminated. It is still an important problem to explore and summarize the mapping method system suitable for continental volcanic rock area and to popularize the mapping technique which reflects the characteristics of volcanism. Volcanic facies are the basis of the process of retroactive volcanism and the restoration of ancient volcanic mechanism, which should be the core elements of volcanic geological map, and lithologic assemblage is the most direct and reliable basis for determining lithofacies types. Lithologic assemblage-lithofacies mapping of volcanic rocks can well reflect the characteristics of continental volcanism.
【作者单位】：中国地质科学院地质研究所;
【基金】：中国地质调查局项目《显生宙重大岩浆事件调查与岩浆岩试点填图》(编号:121201102000150021)
【分类号】：P588.14;P623

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