灾变事件

地层界线上灾变事件标志和成因的探讨

Inquiring into Indicators and Origin of Catastrophic Events at Stratigraphic Boundaries

地球灾变事件与生命过程；

Earth catastrophic events and life process ;

中国东部在燕山期发生了岩石圈＿软流圈系统（LAS）大灾变事件，并识别出被扰动的LAS的两种类型，即在挤压造山环境下的岩石圈巨大减薄与巨大增厚作用；

This paper points out that catastrophe of the lithosphere_asthenosphere system ( LAS ) took place in East China during the Yanshanian movement . Two types of the Yanshanian disturbed LAS and metallogenesis in East China are recognized , viz .

水文灾变事件的一种可公度信息预测方法初探

Study on a Method Of Commensurable Information Forecasting of Hydrologic Disastrous Events

火山喷发的灾变事件终止了油页岩的成矿作用。

The volcanic eruption of the catastrophic event terminated the mineralization of the oil shale .

河西走廊地质历史中宋辽干冷期灾变事件及其影响

Catastrophic events and its affection during frigid and dry climate period of Song-Liao dynasties in Hexi Corridor

地球灾变事件是导致古生物大规模绝灭和沉积环境突变的根本原因。

The mass extinction of organisms and the sedimentary environment mutation are due to the catastrophic event .

江苏全新世灾变事件考古地层学若干问题探讨

Like draws to like the whole world over catastrophic events in archaeological stratigraphy during the Holocene in Jiangsu Province

上述过程反映一次强地震灾变事件作用在软沉积物与坚硬岩层中的不同响应。

The aforesaid process reflects different responses of soft deposits and hard rocks to a strong seismic catastrophic event .

根据震积岩的规模与两条正断层的断陷程度推测，白石山古地震的强度大体相当里氏6级以上，是华北中元古代地震灾变事件濒发期的具体表现。

The earthquake was a concrete manifestation of the stage of repeated occurrence of Mesoproterozoic seismic catastrophic event in North China .

结合这两方面者研究，作者试图从硫同位素地球化学角度，解释二叠系-三叠系生物灾变事件的原因和过程。

According to the result of sulfur isotope , the author tried to explain the cause and process of the catastrophic event during the Permian-Triassic transitional period .

群集出现常伴随着群集消失，这可见于显生宙许多发生过灾变事件的纪一级或其他级别的地层界限附近。

Mass appearance is usually accompanied by mass disappearance , which may be found near many interperiod boundaries or other boundaries of the Phanerozoic where catastrophic events happened .

它们除了代表一次灾变事件外，还反映出形成枕状熔岩的古湖泊接近最大湖泛期，并巨水体较深。

They represent a disastrous event and reflect the fact that the ancient lake where the pillow lavas were formed was then in the maximum expansion with rather deep water .

考古遗址地层环境考古研究是揭示史前和历史时期环境演变与人类活动互动影响以及异常灾变事件成因和发生规律的行之有效方法之一。

All in all , environment archaeology is one of the effective ways in revealing the interaction between environment evolution and human activities and the occurring principles of unusual extreme floods .

应用大量岩心、薄片和成像测井分析资料，对济阳坳陷古近纪沙河街组砂泥质沉积中地震灾变事件的典型识别标志及其成因进行了研究。

Based on core observation , thin section and imaging logging analysis , the typical distinguishing marks and genesis of seismic disaster event in arenaceous-pelitic sediments , Shahejie formation of Paleogene in Jiyang depression were discussed .

事件地层中普遍存在富勒烯，表明天然富勒烯可以作为地层中发生过重大灾变事件的重要的地球化学指标，而具有异常稀有气体同位素组成的富勒烯则是地外撞击事件的最直接证据。

The wide occurrences of fullerenes in the event strata suggest that fullerene can be one of the important geochemical indicators of strata events and fullerene with abnormal noble gas isotopic composition a direct indicator of extraterrestrial impact events .

根据国内外最新研究结果，笔者认为构造事件、生物灾变事件、巨大陨击事件、气候与环境变化都能表现出一定程度的节律性、周期性或旋回性。

According to the recent research results at home and on abroad , the author has considered that the tectonic event , biotic extinction , giant extraterrestrial impact , change of weather and environment are able to show the rhythm periodicity or the cycle to a certain degree .

赣西北地区二叠&三叠纪之交的灾变性地质事件

The catastrophic geological events bet - ween the Permian period and the Triassic period in Northwest Jiangxi region