摘要
由于火山产物形成的机制、搬运条件、定位状态和物质来源的多样性以及同一时代不同火山机体产物在平面上可能的岩相组合、迁移和嵌套等复杂情况,影响火山岩地层的划分、对比和填图。自提出火山岩区“双重填图法”以来,都侧重于工程程序的改革,而针对性地探索其特殊的工作方法还较少见。为此,本文提出用随机模拟和时间系列分析等数学手段去探索解决上述地质问题的可能性。通过宁芜火山岩区龙王山组4条实测剖面的具体分析,较好地解释了火山喷发一沉积双重作用下所形成地层的剖面结构、岩性展布规律、岩相迁移、对比特点、古火山构造定位及其形成环境分析等一系列基础地质问题,显示了此种分析方法的可行性和优越性。
The mechanism of formation, conditions of transportation, state of localization and diversity of material sources of the volcanic products as well as the possible lithofacies as(?) iations, migration and embedding of the products of different volcanic edifices (?) the same age in plan—all these may affect the stratigraphic classification and correlation and geological mapping in volcanic terranes.
Since the initiation of the use of the 'double charting method' in volcanic terranes, stress has been laid on the reform of the work procedure rather than on the exploration of the special work methods. For this reason, such mathematical means as random simulation and time-series analysis are proposed to explore the possibility of solving the above-mentioned geological problems. Through a concrete analysis of 4 measured sections of the Longwangshan Formation in the Nanjing-Wuhu volcanic terrane, this paper discusses a series of problems on fundamental geology such as the structure of the section of the strata formed by the dual geological processes—volcanic eruption and sedimentation, the regularity of distribution of lithologies, migration of lithofacies and its correlation, and localization of paleovolcanic structures and their environments of formation.
出处
《地质论评》
CAS
CSCD
北大核心
1989年第2期154-161,共8页
Geological Review
