新疆石油地质 ›› 1992, Vol. 13 ›› Issue (2): 149-160.

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克拉美利山南麓西大沟平地泉组(P2p)砾质扇三角洲沉积

刘丽华, 赵霞飞   

  1. 成都地质学院,成都 610059
  • 收稿日期:1991-07-09 修回日期:1991-09-23 发布日期:2020-07-27

CONGLOMERATIC FAN-DELTA SEDIMENTS OF THE PINGDIQUAN GROUP(UPPER PERMIAN)IN XIDAGOU AREA,AT SOUTHERN PEDIMONT OF KELAMEILI MOUNTAIN

Liu Lihua, Zhao Xiafei   

  1. Cheagdx Collage of Geologe, Chengdu 610059
  • Received:1991-07-09 Revised:1991-09-23 Published:2020-07-27

摘要: 新疆克拉美利山南麓西大沟二叠系平地泉组,按其沉积特征划分为扇三角洲沉积。它具有三带结构,即:①扇三角洲平原,以瓣状河流及席状洪流沉积为主,是冲积扇体系的一部分;②扇三角洲前缘,包括水下分支河道、河道间沉积及滨岸和席状砂沉积;⑧前扇三角洲,主要由泥岩和粉砂岩组成。整个剖面可划分为8个大的正旋回,备旋回又由许多小的正、反韵律层序成。

关键词: 克拉美利山, 西大沟, 上二叠统, 平地泉组, 扇三角洲, 正旋回, 砾岩

Abstract: The Pingdiquan Group in Xidagou area, according to its sedimentary features, is classified as fan-delta sediments. The Xidagou fan-delts have following three member structure (①fan-delta plain, a part of alluvial system, consist mainly of braided stream and sheet-like-flooding sediments; ②fan-delta front, including underwater dis-tributary channel, inter-channel, shoreline and sheet-like sand sediments; ③pro-delta consists mainly of clays and silts.
The entire profile can be divided into eight positive (fining—upward) cyclothems, and each of them in turn consists of many secondary positive and negative rhythm sequences.

Key words: Keywards: Kelamell mountain, Xidagou area, upper Permian, Pingdiquan group, fan-delta, positive cyclothem, conglomerate