西南石油大学学报(自然科学版) ›› 1982, Vol. 4 ›› Issue (3): 18-24.DOI: 10.3863/j.issn.1000-2634.1982.03.002

• 地质勘探 • 上一篇    下一篇

贵州罗甸边阳及紫云城关地区下三迭统碳酸盐岩岩屑流

  

  1. 西南石油学院勘探系
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1982-08-20 发布日期:1982-08-20

LOWER TRIASSIC CARBONATE DEBRIS FLOW IN LUODIAN-BIANYANG-ZIYUN AREA, GUIZHOU

Department of Geology   

  • Received:1900-01-01 Revised:1900-01-01 Online:1982-08-20 Published:1982-08-20

摘要: 本文论及的碳酸盐岩岩屑流分布于黔南地区下三迭统罗楼群中,主要发育在Ⅱ、Ⅲ岩性段。碳酸盐岩岩屑流具有以下特征:(1)角砾岩为块状,具有清楚的边界。底面平整或波状,下伏层无碎裂现象。(2)砾石成分复杂,大体可分为两类,一类为斜坡沉积经破碎搬运而来;另一类来自台地或台地边缘沉积。(3)大小混杂,分选磨园均差。(4)角砾岩层呈现粗糙的递变。(5)横向分布有限,但可伸入盆地数公里或10余公里,呈席状、沟槽状或透镜状,被盆地相沉积包围,所以,赋存碳酸盐岩岩屑流的地方,是斜坡坡脚或盆地边缘环境。

Abstract: The carbonate debris flow discussed in this paper is distributed prl-
warily in lithologic members of Luolou Group of the earlp Triassic
system in the south of Guizhou province, Its features areThe carbonate
breccias are massive and have clear boundary with a plane or wavy bo-
ttom, 2, The composition of the gravels is complex, they may be roughly
divided into two types:slope sediments and platform or platform margin
sediments.3.Gravels of various size are mixed,sorting and roundness are
poor, 4.The gradation of the breccia is poor too, Its lateral distribu-
tion is limited,it may stretch into the basin several kilometes,sometimes
even more than ten kilometers,having sheet,flute or lens forms,surronud-
ed by the basinal sediments, Therefore,the carbonate debris flow surely
exists at the foot of slopes or on basinal margines,