| 三江北段生达残留弧后盆地晚三叠世层序地层与演化 |
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| 引用本文：彭勇民,潘桂棠,罗建宁,刘家铎.1999.三江北段生达残留弧后盆地晚三叠世层序地层与演化[J].地球学报,20(3):318-324. |
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| 中文摘要:以陆壳为基底的生达残留后盆地被厚度大于５ ０００ ｍ 的晚三叠世沉积岩层所充填。在那里堆积着主要由半深海－ 深海相的陆源、内源与火山源浊积岩沉积，以及特色的弧后拉张产生的碱性系列玄武岩与海底喷流热水沉积等构成的活动边缘沉积物。以露头剖面为基础，识别出Ⅰ类与Ⅱ类层序界面，划分出２ 个Ⅰ类和１ 个Ⅱ类层序。层序形成的主控因素为构造火山作用、沉积物补给与海平面变化，对盆地的演化起到了重要的作用。 |
| 中文关键词:残留弧后盆地 浊积岩 碱性系列玄武岩 层序地层 |
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| Upper Triassic Sequence Stratigraphy and Development of the Shengda Residual Back-arc Basin in Northern Three-River Area |
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| Abstract:The Shengda residual back-arc basin with a crust basement is overlain by the Upper Triassic sedimentary strata more than 5 000m in thickness.The active marginal sediments are composed of bathyal-abyssal,terrigenous,basinal and volcanic turbidite deposits,Characteristic extensive alkalic basalts and submarine exhalativehot water deposits.Through investigation of the cutcrop profile,Ⅰ-type and Ⅱ-type sequence boundaries are identified,and two Ⅰ-type and one Ⅱ-type sequences are recognized.It turus out that the factors of tectono,volcano,sedimentary supply and sea level have formed the sequence and are important for the development of the basin. |
| keywords:Residual back-arc basin turbidite rock alkali series basalt sequence stratigraphy |
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