干旱区生态环境知识资源中心(Arid): 中新世全球重要事件及其意义: 数据挖掘的启示

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	中新世全球重要事件及其意义: 数据挖掘的启示
其他题名	Global major events in Miocene and its significance: Revelation from data mining
	刘欣雨 1; 张旗 2; 张成立 1; 袁方林 1; 焦守涛 3
来源期刊	科学通报
ISSN	0023-074X
出版年	2017
卷号	62 期号:15 页码:1645-1654
中文摘要	GEOROC(Geochemistry of Rocks of the Ocean-sand Continents)是大陆和海洋岩石的地球化学数据库,利用该数据库着重研究了全球新生代汇聚边缘安山岩和玄武岩、裂谷安山岩和玄武岩、洋岛安山岩和玄武岩、埃达克岩等岩浆岩的时空分布特征.结果表明,全球岩浆活动或在中新世开始活跃,或在中新世达到巅峰状态.形成于不同构造环境的岩浆岩具有不同的地质意义:汇聚边缘岩浆岩发育,暗示板块俯冲作用强烈;裂谷岩浆岩大量喷发,表示发育与板块扩张有关的岩浆活动;洋岛岩浆岩迅速增加,指示下地幔异常活跃;埃达克岩广泛分布,表明许多地方受到构造挤压作用,导致地壳加厚.由此推测,全球在中新世可能发生了一次重大的、全球性的岩浆事件.除此之外,全球中新世还发生了一系列重要事件,如青藏高原的隆升及黄土高原的形成、安第斯的抬升、地中海的干涸、全球荒漠化以及西太平洋边缘海盆的发育等.岩浆活动与构造运动通常是相伴而生的,二者间的相互作用改变了古地理、古气候、古环境.中新世剧烈的岩浆活动与构造活动相互作用可能导致地壳加厚或隆起,形成的山脉、高原改变了原有的地形地貌,影响了大气环流,从而改变了地表环境.因此,研究中新世岩浆-构造-气候-环境之间的相互关系,可能是目前和未来一个需要地学工作者长期探索的课题.此外,随着大数据技术的不断发展,科学研究也逐渐步入大数据时代.从全体数据出发,探讨数据之间的关联关系,或许为今后的科研工作提供了一个新的思路.
英文摘要	The GEOROC (Geochemistry of Rocks of the Ocean-sand Continents) database is a comprehensive global petrological database and it is constantly updated and available online to users around the world. Based on this database, we analyze the age data of the global Cenozoic igneous rocks including convergent margin andesite and basalt, continental rift andesite and basalt, ocean island andesite and basalt, adakite, and so on. Statistical analysis reveals that the global magmatism either became active in the Miocene or peaked in the Miocene. Magmatic rocks formed in different tectonic settings represent different geological effects: convergent margin magmatic rock suggests the speed up of subduction; the huge eruption of rift andesite and basalt indicates the occurrence of plate extension; the sharp increase of ocean island andesite and basalt indicates an abnormally active lower mantle, which brings materials from the lower mantle into the crust; a large scale of medium-acid magmatic rock represents the lower crust at high temperature and the asthenosphere mantle strongly upwelling, which leads to the crust intensely reforming; adakite is usually related to strongly tectonic pressing and results in crustal thickening in these areas. In addition, there was a series of significant events in the Miocene. For instance, the Tibetan Plateau rapidly uplifted in the middle Miocene, leading to the formation of the Loess Plateau; the Andean Mountains rose abruptly probably during 8-3 Ma; Tethys dried up from 20-5 Ma, which may have been a cause of the global desertification; the development of the western Pacific marginal sea basins mainly occurred during the late Oligocene to early Miocene. We tried to explain the connection among all of these events as follows. Generally, magmatism usually goes with tectonic activities, and their interaction may change the paleogeography, paleoclimate, and paleoenvironment. The accelerated motion of the Pacific Plate in the Miocene could have thickened or raised the crust, resulting in the formation of the Andean mountains. The interaction between the Indian plate and Eurasian plate in the Miocene induced the speedy uplifting of the Tibetan Plateau. The new mountain and plateau reformed the original landscape and landform, which made these areas easily suffer weathering and erosion, and the resulting sediments were taken into global ocean basalts with ocean currents. As a result, the accumulation rate of oceanic sediments would have risen quickly. Furthermore, the upraising of the Andean and Tibetan Plateaus also influenced the general atmospheric circulation, which ultimately changed the environment; this might be an important reason why primitive man originated from the Miocene. In addition, as for China, the strike-slip fault in the Red River, the expansion of the South China Sea, and the formation of the Taklimakan Desert may be more or less related to the magmatism in the Miocene. There remain a number of problems to explore. Therefore, studying the interrelationship among magmatism, tectonic activity, climate, and environment in the Miocene should be a priority for geoscience workers in the present and future. Besides, scientific research is gradually entering the big data era, and geological science is no exception. The primary characteristic of big data research is not how big the data is but how creative the thought is. In this study, we took advantage of all available data to investigate the relationship among the data sets. The findings reveal that data mining with a global database can provide new insights and new lines of inquiry for scientific research in the future.
中文关键词	中新世 ; 事件 ; 火山岩浆活动 ; 数据挖掘
英文关键词	Miocene events magmatic activity data mining
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:6003387
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236235
作者单位	1.西北大学地质学系, 大陆动力学国家重点实验室, 西安, 陕西 710069, 中国; 2.中国科学院地质与地球物理研究所, 北京 100029, 中国; 3.中山大学地球科学与地质工程学院, 广州, 广东 510275, 中国
推荐引用方式 GB/T 7714	刘欣雨,张旗,张成立,等. 中新世全球重要事件及其意义: 数据挖掘的启示[J],2017,62(15):1645-1654.
APA	刘欣雨,张旗,张成立,袁方林,&焦守涛.(2017).中新世全球重要事件及其意义: 数据挖掘的启示.科学通报,62(15),1645-1654.
MLA	刘欣雨,et al."中新世全球重要事件及其意义: 数据挖掘的启示".科学通报 62.15(2017):1645-1654.