西南石油大学学报(自然科学版)
西南石油大學學報(自然科學版)
서남석유대학학보(자연과학판)
JOURNAL OF SOUTHWEST PETROLEUM UNIVERSITY(SEIENCE & TECHNOLOGY EDITION)
2014年
5期
1-15
,共15页
胡广%曹剑%胡文瑄%姚素平%刘文汇
鬍廣%曹劍%鬍文瑄%姚素平%劉文彙
호엄%조검%호문선%요소평%류문회
大洋缺氧事件%陆相沉积%早白垩世%中国东南沿海%烃源岩
大洋缺氧事件%陸相沉積%早白堊世%中國東南沿海%烴源巖
대양결양사건%륙상침적%조백성세%중국동남연해%경원암
Oceanic Anoxic Event(OAE)%terrestrial deposits%lower Cretaceous%southeastern China%source rock
大洋缺氧事件(OAE)是了解地球系统的关键事件之一,与其基本等时的陆相沉积是对海相体系内OAE研究必不可少的补充。目前关于OAE的研究范围越来越宽泛,已经开始了对与OAE同步的陆相沉积研究和探索;研究内容越来越细化,重视不同类型有机质的地球化学特征研究;研究精度越来越高,进入高分辨率和密集样品分析阶段。但OAE特征及其驱动机制存在争议;基本等时的海-陆黑色泥页岩事件之间的是否存在成因联系还不十分清楚,特别是置于精确年代学格架下的海-陆精细对比研究几乎没有。此外,与OAE相关的黑色泥页岩及其等时的陆相黑色泥页岩均是重要的烃源岩,而目前关于OAE对烃源岩的影响及石油地质意义研究较少。中国东南沿海地区的下白垩统可望提供一个良好研究实例,其陆相-过渡相黑色泥页岩形成于113±3 Ma到109±2 Ma,时间上与OAE吻合;碳同位素负漂特征与OAE相似,可全球对比。
大洋缺氧事件(OAE)是瞭解地毬繫統的關鍵事件之一,與其基本等時的陸相沉積是對海相體繫內OAE研究必不可少的補充。目前關于OAE的研究範圍越來越寬汎,已經開始瞭對與OAE同步的陸相沉積研究和探索;研究內容越來越細化,重視不同類型有機質的地毬化學特徵研究;研究精度越來越高,進入高分辨率和密集樣品分析階段。但OAE特徵及其驅動機製存在爭議;基本等時的海-陸黑色泥頁巖事件之間的是否存在成因聯繫還不十分清楚,特彆是置于精確年代學格架下的海-陸精細對比研究幾乎沒有。此外,與OAE相關的黑色泥頁巖及其等時的陸相黑色泥頁巖均是重要的烴源巖,而目前關于OAE對烴源巖的影響及石油地質意義研究較少。中國東南沿海地區的下白堊統可望提供一箇良好研究實例,其陸相-過渡相黑色泥頁巖形成于113±3 Ma到109±2 Ma,時間上與OAE吻閤;碳同位素負漂特徵與OAE相似,可全毬對比。
대양결양사건(OAE)시료해지구계통적관건사건지일,여기기본등시적륙상침적시대해상체계내OAE연구필불가소적보충。목전관우OAE적연구범위월래월관범,이경개시료대여OAE동보적륙상침적연구화탐색;연구내용월래월세화,중시불동류형유궤질적지구화학특정연구;연구정도월래월고,진입고분변솔화밀집양품분석계단。단OAE특정급기구동궤제존재쟁의;기본등시적해-륙흑색니혈암사건지간적시부존재성인련계환불십분청초,특별시치우정학년대학격가하적해-륙정세대비연구궤호몰유。차외,여OAE상관적흑색니혈암급기등시적륙상흑색니혈암균시중요적경원암,이목전관우OAE대경원암적영향급석유지질의의연구교소。중국동남연해지구적하백성통가망제공일개량호연구실례,기륙상-과도상흑색니혈암형성우113±3 Ma도109±2 Ma,시간상여OAE문합;탄동위소부표특정여OAE상사,가전구대비。
Oceanic Anoxic Event(OAE)is the key to decipher the Cretaceous Earth System. The studies of the terrestrial deposits which were isochronous to OAE and impaction on source rocks are essential supplements for the researches on OAE. Take a reviewing look on this field,three trends can be drawn:(1)the scope of OAE researches become wider,and begin to concern the terrestrial deposits;(2)the work on OAE become more detailed,and more attention are paid to the geochemical characteristics of different types of organic matters;(3)the precisions of studies become higher,and high resolution and dense sampling strategy are begins to be carried out. However,the features and the triggers of the OAE are still disputed,and whether or not there are the terrestrial responses to OAE remains enigmatic. The research of terrestrial deposits which were isochronous to OAE is still very less,especially the correlation between marine and terrestrial systems under the precise chronological framworks. In addition,although the black shales that deposited during the OAE are important source rocks,but so far less attention paid to the impacts of OAE on the source rocks. The case study on the Lower Cretaceous terrestrial-transitional black shales(deposited during 113 ± 3 Ma to 109 ± 2 Ma)indicated that these black shales not only are isochronous to the OAEs but also have similar negative carbon isotopic characteristics. The terrestrial-transitional Lower Cretaceous black shales in southeastern China might have relation with OAE. The OAE has active influence on the formation of terrestrial source rocks.