松辽盆地东南缘籍家岭泉头组沉积微相特征及演化：由冲积扇演化为曲流河的典型露头剖面

现代地质 ›› 2015, Vol. 29 ›› Issue (6): 1338-1347.

松辽盆地东南缘籍家岭泉头组沉积微相特征及演化：由冲积扇演化为曲流河的典型露头剖面

刘朋远¹，柳成志²，辛仁臣¹

(1. 中国地质大学(北京)海洋学院，北京 100083；2. 东北石油大学地球科学学院，黑龙江大庆 163318)

出版日期:2015-12-24 发布日期:2016-02-29
通讯作者: 柳成志，男，博士，教授，1962年出生，矿产普查与勘探专业，主要从事沉积学、层序地层学、石油地质方面的研究工作。Email：lchzhdq@sina.com。
作者简介:刘朋远，男，博士研究生，1987年出生，海洋地质专业，主要从事含油气盆地沉积学、层序地层学、储层预测方面的研究工作。Email：liupengyuan0523@163.com。
基金资助:
国家科技重大专项“岩性地层油气藏成藏规律、关健技术及目标评价”(2011ZX05001002)。

Sedimentary Microfacies Characteristics and Evolution of Quantou Formation in Jijialing Profile in the Southeast Margin of the Songliao Basin：A Typical Profile Reflecting the Evolution of Alluvial Fan to Meandering River

LIU Peng-yuan¹，LIU Cheng-zhi²，XIN Ren-chen¹

(1. School of Ocean Sciences, China University of Geosciences, Beijing 100083, China； 2. Geoscience College, Northeast Petroleum University, Daqing, Heilongjiang 163318，China)

Online:2015-12-24 Published:2016-02-29

摘要/Abstract

摘要：

以松辽盆地东南缘籍家岭泉头组露头为研究对象。通过对露头的野外实测及粒度分析，揭示了籍家岭泉头组露头是由冲积扇演化为曲流河相的典型露头剖面。垂向上，露头从0~28 m发育冲积扇相，28~70 m发育辫状河相，70~510 m发育曲流河相。其中冲积扇相发育扇中、扇端2种亚相，区分出泥石流沉积、泥流沉积、扇面河道沉积、漫流沉积、淤积物5种微相。辫状河相发育河道、河漫2种亚相，区分出滞留沉积、心滩、河漫滩3种微相。曲流河相发育河道、堤岸及河漫3种亚相，区分出滞留沉积、边滩、天然堤、决口扇、河漫滩5种微相。粒度概率曲线分析结果显示：冲积扇为悬浮一段式及滚动—跳跃—悬浮三段式、辫状河为滚动—跳跃—悬浮三段式、曲流河为跳跃—悬浮二段式的组合特征。冲积扇—辫状河—曲流河这一演化过程反映了松辽盆地东南缘泉头组沉积时期较大的地势高差—陡坡—准平原化的古地理背景。

关键词: 松辽盆地, 籍家岭露头, 泉头组, 沉积相, 沉积演化

Abstract:

The sedimentary characteristics are treated in this study for Jijialing profile which is located in the southeast margin of the Songliao basin. According to the accurate investigation and granulometric analysis，Jijialing profile is a typical profile which reflected the evolution of alluvial fan to meandering river.Vertically，the profile developed alluvial fan facies from 0 to 28 m, braided river facies from 28 to 70 m and meandering river facies from 70 to 510 m.The alluvial fan was divided into two subfacies，namely medial fan and distal fan.The two subfacies can be subdivided into five microfacies，namely debris flow，mudflow，fun-surface channel，cross flow and shoal materials.The braided river was divided into two subfacies，namely channel and floodplains.The two subfacies can be subdivided into three microfacies，namely channel lag deposit，braided bar and overbank.The meandering river was divided into three subfacies，namely channel，channel levee and floodplains.The three subfacies can be subdivided into five microfacies，namely channel lag deposit，point bar，natural levee， crevasse fan and overbank.The characteristics of probability cumulative grain size curves in different sedimentary facies are as follows: The probability cumulative grain size curves of alluvial fan include ‘one suspension’and‘roll-leap-suspension’ patterns；The braided river has ‘roll-leap-suspension’ pattern; The meandering river has ‘leap-suspension’ pattern.The continuous evolution of alluvial fan—braided river—meandering river reflected paleogeographic background of large terrain elevation—steep slope—peneplain during the sedimentary period of Quantou Formation in the southeast margin of the Songliao basin.

Key words: Songliao basin, Jijialing profile, Quantou Formation, sedimentary facies, sedimentary evolution

中图分类号:

TE122.2

刘朋远，柳成志，辛仁臣. 松辽盆地东南缘籍家岭泉头组沉积微相特征及演化：由冲积扇演化为曲流河的典型露头剖面[J]. 现代地质, 2015, 29(6): 1338-1347.

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