摘要
笔者等在滇西姚关一带工作中,首次在上三叠统大水塘组中发育一套地质特征典型、沉积序列明显的钙屑浊积岩。其底面侵蚀构造清楚,各层段厚度变化较大,粒度分布上表现为从底到顶由粗变细的正粒序特征。鲍马序列发育不完整,c段多不明显,多为a、b、d、e段组合。初步认为浊流活动可能受近北东向古断裂控制,其活动与滇西陆内裂解事件有关。
In Yaoguan area, a series of calcarenitic turbidite which the geological characteristics are typical and the sedimentary sequence is obvious was found in Dashuitang formation of upper Triassic. The bottom erosion structure is clear, the thickness of each layer changes a lot, the grain size shows obverse order feature which becomes thinner from the bottom to the top. Bouma sequence develops incompletely, section C isn＇ t obvious, most composition are section A, B, D and E. it＇ s thought that turbidity current may be controlled by NE ancient fracture, its activities has relation with inland breakup event in western Yunnan.
出处
《贵州地质》
2014年第3期201-205,共5页
Guizhou Geology
基金
中国地质调查局<由旺街幅
施甸幅
姚关幅1:5万区域地质调查>项目(编码:1212010784005)成果
关键词
浊积岩
沉积特征
陆内裂解
晚三叠世
滇西姚关
Turbidite
Sedimentary characteristic
Inland breakup
Late Triassic
Yaoguan Western Yunnan
作者简介
彭成龙（1970-）,男,地质工程师,从事区调工作.
