试论盆地内火山岩地层发育的层序位置——以松辽盆地徐家围子断陷为例  

PRELIMINARY STUDY ON SEQUENCE'S LOCATION OF VOLCANIC STRATIGRAPHY IN SEDIMENTARY BASIN ——AN EXAMPLE FROM XUJUNWEIZI DEPRESSION OF SONGLIAO BASIN

作　　者：邱春光[1] 王璞珺[2] 

机构地区：[1]中国地质大学,北京100083 [2]吉林大学地球科学学院,吉林长春130061

出　　处：《新疆石油天然气》2006年第1期13-17,共5页Xinjiang Oil & Gas

摘　　要：通过对松辽盆地徐家围子断陷层序地层特点和火山岩地层发育层位的研究,认识到火山岩地层大多出现在超层序组及超层序的顶部和底部。在对钻井岩性剖面进一步的研究认为火山岩地层一般发育在三级层序的顶底部,主要发育体系域包括低位体系域和高位体系域。形成这些特点的主要因素可能为构造对火山岩地层和层序地层的发育起主要的控制作用,次要因素是火山岩地层的瞬时发育影响了可容纳空间(A)/沉积物供给(S)比值,从而对层序及体系域的发育起到了作用。According to the research on sequence stratigraphy's characteristics and volcanic stratigraphy in Xujiaweizi depression of Songliao basin,it is acknowledged that volcanic stratigraphy almost appears in the top and bottom of supper sequence sets and supper sequence.Moreover,based on the farther analysis of some lithology section,volcanic stratigraphy also frequently appears in the top and bottom of 3-order sequence,such as lowstand systems tract and highstand systems tract.The primary reason of this phenomena is that tectonic evolvement dominates formation of volcanic stratigraphy and sequence stratigraphy;the subordinate reason is that the formation of volcanic stratigraphy impacts ratio of accommodation space to sedimentary supply(A/S).

关 键 词：徐家围子断陷 层序地层 火山岩地层 构造演化 

分 类 号：P539.2[天文地球—古生物学与地层学]