沉积与特提斯地质2025，Vol.45Issue(3)：459-471,13.DOI:10.19826/j.cnki.1009-3850.2024.11001
滇东北地区二叠系梁山组岩相古地理及其对铝土矿的控矿意义
Ore-controlling significance and paleogeography of the Permian Liangshan Formation in northeastern Yunnan Province
摘要
Abstract
This study investigates the bauxite resources of the Permian Liangshan Formation in northeastern Yunnan Province through detailed lithofacies paleogeography research based on outcrop and drill observations.Utilizing petrological,paleontological,element geochemical,and laboratory analyses,the sedimentary facies are classified into backshore,coastal swamp,foreshore,and nearshore facies.Lithofacies and paleogeography studies show that,during the early Middle Permian,extensive karstification of the carbonate basement lead to negative landforms such as karst depressions and funnels in the area of Yaoshan in Qiaojia-Taiyangba in Daguan-Zhongming in Yiliang,providing ideal accumulation space for ore-bearing rock series.The area was dominated by a low-energy coastal swamp environment occasionally subjected to wave action.During the Permian,the Yangtze Block was generally located in the low latitudes near the equator,and the suitable hot and humid climate facilitated fresh water leaching,including rain,leading to the accumulation and mineralization of aluminaceous materials.From a regional perspective,the South Chongqing-North Guizhou area and the northeastern Yunnan area belong to the coastal swamp facies belt,and the northeastern Yunnan area is expected to become another bauxite-rich area of the Liangshan Formation,comparable to the Wuchuan-Zheng'an-Daozhen bauxite area.关键词
滇东北/梁山组/沉积相/岩相古地理/铝土矿/控矿意义Key words
northeastern Yunnan Province/Liangshan Formation/sedimentary facies/lithofacies paleogeography/bauxite/ore-controlling significance分类
天文与地球科学引用本文复制引用
葛祥英,李星,唐建东,牟传龙,王子正,崔晓亮,牛浩斌,周邦国,夏彧,王启宇,陈子聪..滇东北地区二叠系梁山组岩相古地理及其对铝土矿的控矿意义[J].沉积与特提斯地质,2025,45(3):459-471,13.基金项目
中国地质调查局项目"上扬子西缘大关安宁地区铜钴锂铝土矿等矿产矿调查评价"(DD20230283),"渝南黔北铝土矿大型资源基地综合地质调查"(DD20242003),"中上扬子地区岩相古地理与资源环境效应"(DD20242564),"滇东北铝磷矿大型资源基地综合地质调查"(DD20242114) （DD20230283）
国家自然科学基金联合基金项目"扬子西北缘早古生代海相盆地多幕次构造-沉积转换及其成烃成储响应"(U2344209) （U2344209）
