松辽盆地白垩系营城组再搬运火山碎屑与相模式

沈艳杰; 程日辉; 于振锋; 夏志威; 张振

doi:10.3799/dqkx.2014.018

松辽盆地白垩系营城组再搬运火山碎屑与相模式

doi: 10.3799/dqkx.2014.018

1.
吉林大学地球科学学院, 吉林长春 130061
2.
山西蓝焰煤层气集团有限责任公司国家能源煤与煤层气共采技术重点实验室, 山西晋城 048012
3.
胜利油田物探研究院, 山东东营 257022

基金项目:

国家自然科学基金项目"松辽盆地断陷火山碎屑的沉积作用及扇堆积几何学" 40972074

详细信息

作者简介:
沈艳杰(1981-), 女, 讲师, 博士, 主要从事沉积学和石油天然气地质学研究.E-mail: shenyj@jlu.edu.cn

通讯作者:
程日辉, E-mail: Chengrh@jlu.edu.cn

中图分类号: P512.2;P588.2
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- 被引次数: 0
出版历程
- 收稿日期: 2012-03-28
- 刊出日期: 2014-02-01

Reworked Pyroclastics Deposits and Facies Model of Cretaceous Yingcheng Formation in Songliao Basin, NE China

1.
College of Earth Sciences, Jilin University, Changchun 130061, China
2.
Key Laboratory of National Energy Coal and Coal Bed Methane Joint Mining Technology, Shanxi Blue Flame CBM Company Limited, Jincheng 048012, China
3.
Geophysical Research Institute of Shengli Oilfield, Dongying 257022, China

摘要

摘要: 以松辽盆地东南缘营城组二段两类火山碎屑岩(沉凝灰岩、凝灰质砂岩)为研究对象, 进行了火山碎屑粒度特征、碎屑组成和火山碎屑岩相研究.结果显示, 火山碎屑搬运除受火山作用激发控制外, 还受牵引流、重力流以及牵引流和重力流的双重机制影响.火山碎屑微观特征、成因分析和岩相分析认为, 本区火山碎屑堆积主体为热基浪堆积和热碎屑流堆积, 部分为空落堆积.火山碎屑组成特征为晶屑含量多, 玻屑和岩屑含量少, 且岩屑仅在较粗粒级颗粒组成中存在.研究认为, 本区发育的火山碎屑为沉积环境中的再搬运火山碎屑, 共识别出4种火山碎屑岩相, 河流故道上的热基浪, 河流故道上的热碎屑流, 冲积平原上的热基浪和空落相.建立了松辽盆地东南缘露头区营城组二段河流-冲积平原沉积环境的再搬运火山碎屑岩相模式.
- 松辽盆地 /
- 营城组 /
- 火山碎屑岩 /
- 再搬运火山碎屑 /
- 相模式 /
- 沉积学
Abstract: The pyroclastics grain size characteristics, the pyroclastics composition and the pyroclastics rocks facies of two types of pyroclastics rocks samples of Yingcheng Formation in the southeast edge of Songliao basin, tuffs and tuffaceous sandstone, had been studied. The results show that, the pyroclastics had been transported at the beginning by volcanism excitation, however, traction flow, gravity flow and the double mechanism of traction flow and gravity flow controlled the transportation process. The conclusion drawn from pyroclastic microscopic characteristics study, genetic type analysis and lithofacies analysis of those samples in study area calculates that, the majority volcanic debris accumulation was composed of hot base surge and pyroclastic flow deposition and a small portion had been composed of fallout. The characteristics of detrital composition were those, there were a large amount of crystal fragments, a small amount of shard and lithic fragments, and the lithic fragments existed only in coarse grain composition. Studies suggest that, the pyroclastics outcropped in this area were the reworked pyroclastics in the depositional environment. There were 4 types of pyroclastics facies, the hot base surge in the previous valley, the pyroclastics flow in the previous valley and the base surge and fallout on the alluvial plain had been distinguished in this area. Based on the member Ⅱ of Yingcheng Formation in the southeast edge of Songliao basin, facies models of the reworked pyroclastics in these fluvial-alluvial plain sedimentary environments were established.
- Songliao basin /
- Yingcheng Formation /
- pyroclastic rock /
- reworked pyroclastics /
- facies model /
- sedimentology

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图 1 松辽盆地东南缘六台石场村营城组二段出露位置及柱状剖面(据侯景涛等，2007)

Fig. 1. Location and columnar section of the member Ⅱ of Yingcheng Formation in Shichang village, Liutai in the southeast margin of Songliao basin

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图 2 营城组二段剖面3的S旋回

a.剖面2的23-③层炭化木；b.剖面3的71层凝灰质砂岩透镜体；c.剖面2的23-④层顶部冲刷面；d.浮岩屑，Y1D1井82.95 m；e.浮岩屑，Y1D1井82.95 m；f.凝灰质砂岩中玻屑(+10)，剖面3样品PSC-3；g.凝灰质砂岩中玻屑(-10)，剖面3样品PSC-3；h.沉凝灰岩中浮岩屑(-10)，剖面3样品④-9；i.玻屑，Y1D1井82.95 m

Fig. 2. S cycle of the third profile of the upper section of the member Ⅱ Yingcheng Formation

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图 3 营城组二段剖面2的G旋回(a)和剖面3的S旋回(b)

Fig. 3. G cycle of the second profile (a) and S cycle of the third profile (b) of the member Ⅱ of Yingcheng Formation

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图 4 营城组二段火山碎屑偏度-标准偏差

Fig. 4. Diagram of skewness-standard deviation of the member Ⅱ of Yingcheng Formation

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图 5 剖面2、剖面3样品累积频率和概率累积曲线

Fig. 5. The accumulated frequency curve and cumulative grain size characteristics of samples of the second and the third profiles

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图 6 剖面2和剖面3火山碎屑成分、含量及其粒度特征

Fig. 6. Pyroclastic composition, contents and its cumulative grain size characteristics of samples in the second profile and the third profile

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图 7 营城组二段火山碎屑成因类型(底图据Walker，1983)

Fig. 7. Pyroclastic genetic type of the member Ⅱ of the Yingcheng Formation

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图 8 岩石样品的阴极发光特征

a.白色斜长石(+10)，剖面2的④-5；b.粉色斜长石(+10)，剖面2的④-2；c.绿色钾长石(+10)，剖面2的④-1；d.石英、长石(+10)，剖面3样品2；e.长石(+10)，剖面3样品5；f.蓝色石英(+10)，剖面2的④-1

Fig. 8. Rock sample characteristics under the cathodoluminescence microscope

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图 9 营城组二段沉积作用区综合相模式

Fig. 9. Comprehensive facies model in the deposition zone of the member Ⅱ of Yingcheng Formation

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