沉积与特提斯地质2009，Vol.29Issue(2)：33-38,6.
滇东南法郎组含锰地层沉积相分析
Sedimentary facies of the manganese-bearing strata in the Falang Formation, southeastern Yunnan
摘要
Abstract
There is still debate concerning the sedimentary environments of the Middle Triassic Falang Formation as important manganese-bearing strata in southeastern Yunnan: a deep-marine turbidite fan or a shallow-water tidal flat. The authors in this study contend, on the basis of representative sections in the Jianshui-Kaiyuan region, that the Falang Formation represents the turbidite fan deposits. The lowermost part of the Falang Formation is made up of the carbonate slump deposits, debris flow deposits and the interbeds of mudstone and siltstone, followed by the outer-fan to mid-fan braided channel and braided interchannel deposits in the middle-upper part, and inner-fan recharge channel and overbank deposits in the uppermost part of the Falang Formation. On the whole, the sea water became progressively deeper during the early Ladinian, and shallower during the middle and late Ladinian. The manganese ores are mostly hosted in the debris flow deposits in the lowermost part of the Falang Formation, implying that the origin of the manganese ores may be associated with relative sea-level rise during the early Ladinian.关键词
法郎组/浊积扇/碎屑流/锰矿Key words
Falang Formation/turbidite fan/debris flow/manganese ores分类
天文与地球科学引用本文复制引用
李盛俊,伊海生,马雪,夏国清,荣建峰,达雪娟..滇东南法郎组含锰地层沉积相分析[J].沉积与特提斯地质,2009,29(2):33-38,6.基金项目
南盘江中三叠世成锰盆地沉积特征和成矿作用研究(2006BAB01A12-5) （2006BAB01A12-5）
