| 地质事件、序列和事件群 |
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| 引用本文： | 陆松年,李怀坤,等.地质事件、序列和事件群[J].地质论评,2001,47(5):521-526. |
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| 作者姓名： | 陆松年 李怀坤 |
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| 作者单位： | 中国地质调查局天津地质矿产研究所,300170 |
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| 基金项目： | 国家自然科学基金(编号40032010-C)，中国地质调查局综合研究项目(编号200113900070)的研究成果 |
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| 摘 要： | 在前寒武纪变质基底和造山带中，由于多期热－构造事件的影响，以及透入性片理和构造岩的发育，造成变质深成侵入体，构造岩和表壳岩鉴别的困难，。即使表壳岩系统也因强烈的变形而不能够完全运用叠置地层学的方法进行地层划分和对比，因而事件地质学的思路和方法的应用颇为广泛。地质事件是地史演化过程中，不同于正常地质历史发展的突发性，或灾变性，或具有特殊意义的地质记录，在正确识别地质事件的性质和特征的基础上，需建立地质事件的序列，事件序列的建立包括两个步骤，首先要在野外翔实的工作基础上建立地质事件的相对序列，然后在此基础上运用多元同位素测年方法标定主要或特征地质事件的时代，建立地质事件的年代格架。地质事件群或组合则是成因上有联系，空间上相匹配，时间上有先后的一组地质事件，它比单独的一个事件更深刻地反映地质历史演化的过程和特点，正确归并和界定地质事件群在研究区域地质演化特征或进行大区域间的地质对比时具有十分重要意义。
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| 关 键 词： | 地质事件 事件序列 事件年代格架 事件群 造山带 构造事件 变质岩 |
Geological Events, Event Sequence and Event Group |
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| LU Songnian,LI Huaikun,YU Haifeng Tianjin Institute of Geology and Mineral Resources,CGS,Tianjin.Geological Events, Event Sequence and Event Group[J].Geological Review,2001,47(5):521-526. |
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| Authors: | LU Songnian LI Huaikun YU Haifeng Tianjin Institute of Geology and Mineral Resources CGS Tianjin |
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| Abstract: | Owing to the influence of multi-phase thermo-tectonic events and simultaneously developed penetrating schistosity and structure replacement, it is usually difficult to distinguish metamorphic plutonic intrusions, tec-tonites and supracrustal rocks from each other in Precambrian basements and orogens. And similarly because of strong metamorphism and deformation, even the conventional Smith stratigraphic method cannot be totally applied to supracrustal rocks for stratigraphical subdivision and correlation. Therefore the idea and methodology of event geology are widely used in the research of Precambrian basements and orogens. A geological event is a geological record with special geological significance that is developed or occurred sporadically/cataclysmically in the normal progress course of the earth history. It is necessary to establish a geological event sequence on the basis of correct recognition of the geneses and characteristics of a series of geological events. The establishment of event sequence includes two steps, i. e. firstly to establish the relative sequence based on adequate and systematic fieldwork, and afterwards to date the principal and typical geological events using multi-isotopic dating methods and therefore to establish the geochronological framework of relevant geological events. A geological event group or assemblage is a series of events that are genetically related and spatiotemporally coexist, which reflects the process and characteristics of geological evolution more profoundly than a single event does. It is of great significance to define geological events and merge them into an event group in the research on regional geological evolution and geological correlation between large regions. |
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| Keywords: | Geological events event sequence geochronological framework event group |
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