摘要
为深化黔中铝土矿的研究,在贵州中部铝土矿西南缘的织金岔河地区选取了仰天窝、堰塘和大栗树三条铝土矿含矿岩系剖面进行了系统描述及采样。经分析得出本区铝土矿含矿岩系具有下部铁质层,上部铝质层的铁-铝结构特征。具有沉积环境指示意义的Sr/Ba值、Th/U值、δCe值表明本区的沉积环境大体如下:东端的堰塘剖面在铝土矿沉积时地势较低,且距离海岸相对较近,受海水侵入的影响较为强烈;西端的大栗树及南端的仰天窝剖面在铝土矿沉积时相对远离海岸,受海水的影响较小,主要为淡水沉积。结合成矿特征,反映出弱还原环境、淡水沉积的大栗树剖面较有利于优质铝土矿的形成,还原环境、受海水影响的堰塘剖面成矿环境最差。综合分析,表明成矿物源来源于研究区北面,大栗树和仰天窝间的区域可作为下步勘查的有利区域。
In order to facilitate the study of bauxite in central Guizhou,three ore-bearing rock series profiles of Chahe bauxite called Yangtianwo,Yantang and Dalishu were selected for systematic description and sampling in the field.It is concluded that the ore-bearing rock series of bauxite in this area are characteristic of the iron-aluminum structure,where the lower layer is iron-rich and the upper layer is aluminum-rich.The Sr/Ba value,Th/U value andδCe value indicate sedimentary environment of this area are as follows.The topography of Yantang section at the eastern end is lower,relatively close to the coast and strongly affected by the seawater;The profiles of Dalishu in the west end and Yangtianwo in the south end are relatively far from the coast,less affected by seawater and mainly composed of freshwater deposits.Combined with the metallogenic characteristics,it is shown that Dalishu profile with weak reduction environment and fresh water deposition is relatively favorable to the formation of high-quality bauxite.Yantang profile with the reduction environment and the influence of sea water has the worst metallogenic environment.The comprehensive analysis shows that the mineralization source comes from the north of the study area,and the area between the Dalishu and Yangtianwo can be considered as the favorable area for further exploration.
作者
周汝贤
杨瑞东
陈圣光
ZHOU Ru-xian;YANG Rui-dong;CHEN Sheng-guang(College of Mining Engineering,Guizhou University of Enginerring Science,Bijie 551700,China;College of Geoscience and Surveying Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China;College of Resource and Environment Engineering,Guizhou University,Guiyang 550025,China)
出处
《科学技术与工程》
北大核心
2020年第7期2554-2563,共10页
Science Technology and Engineering
基金
贵州省省、市、院科技联合基金(黔科合LH字[2016]7046号)
贵州省科技厅科技平台及人才团队计划(黔科合[2018]5613)。
关键词
含矿岩系
铝土矿
成矿因素
织金
贵州
ore-bearing rock series
bauxite
metallogenic factors
Zhijin
Guizhou