沉积型铝土矿及其含矿岩系在溶蚀洼地中的沉积特征——以遵义后槽矿区为例.pdf

第43卷第2期
中国地质
Vol 43. No. 2
2016年4月
GEOLOGY IN CHINA
pr.,2016
刘平,廖友常,张雅静.沉积型铝土矿及其含矿岩系在溶蚀注地中的沉积特征一以遵义后槽矿区为例[.中国地质,2016,43(2):546-563
Liu Ping, Liao Youchang, Zhang Yaing. Sedimentary characteristis of eimentary bauxite and orc-bcaring rock series in corroded depression: A
case study of the Houcao mining area in Zun ] Geology in China, 2016, 43(2): 546-(Chinese with English abstract)
沉积型铝土矿及其含矿岩系在溶蚀洼地中的
沉积特征一一以遵义后槽矿区为例
刘平廖友常张雅静
费州省地矿局106地质大队,贵州遵义563000
提要:位于遵义铝土矿带中部的后槽矿区,受NE-SW向岩溶盆地控制,溶盆内分布有众多形态各异的中、小型溶
注、溶坑和溶沟,在这些溶蚀洼地屮,沉积了下石炭统九架炉组的铝土矿含矿岩系。其中主要有似泥石流沉积、
泽、泥炭沼泽沉积和洪泛漫流沉积。似泥石流沉积物与沼泽、泥炭沼泽沉积物多次交替重叠,构成了多个沉积旋回,
表明沉积环境发生过多次周期性变化。似泥石流沉积和洪泛覆流沉积,是形成铝土矿的主要沉积作用。洪泛漫流
沉积形成的、覆盖全区所有溶蚀注地的铝土矿体最为重要,称为“主流面状矿体”。“主流闻状矿体”形成之后,本区原
始的红土风化壳物质向九架炉组铝土矿含矿岩系沉积物的转变阶段即告终结。铝土含矿岩系的形成,主要是在
各种溶蚀注地中陆相复合沉积作用的结果
关键词:沉积型铝土矿;溶蚀洼地;沉积特征;后槽矿区;遵义
中图分类号:P536文献标志码:A文章编号:10003657(2016)02-0546-18
Sedimentary characteristics of sedimentary bauxite and ore-bearing rock series
in corroded depression: A case study of the Houcao mining area in Zunyi
LIU Ping, LIAO You chang, ZHANG Ya-jing
(No. 106 Geological Part Bureaw ofgeogy and Mineral Exploration and Development of Guizhou Province, Zunyi 563000,
Guizhou, China)
Abstract: There are many medium and small karst depressions, karst pits and karst ditches with varied morphology in the NE-SW
karst basin of the Houcao mining ar a in the middle of Zunyi bauxite belt. The bauxite-bearing rock series of Lower Carboniferous
Jiujialu Formation was deposited in these corroded depressions. The sedimentary types were mainly debris flow-like deposition,
swamp deposition, peat bog deposition and flooding sheetflood deposition. Sediments of these sedimentary types were altematively
deposited in multiple depositional cyeles. This shows that the depositional environment changed repeatedly and periodically. Debris
flow deposit and flooding sheetflood deposit seem to have been the main sedimentary types in the bauxite mineralization process
Bauxite orebodies were formed by flooding sheetflood deposition, alled mainstream planar orebodies",which constituted the main
收稿日期:2015-03-02;改回日期:2015-04-26
作者简介:刘平,男,1935年生,高级工程师,长期从事地质和矿产资源勘査工作;:E-mai:lbc106@163.com。
ht: geochina.cgs.gov.cn中国地质,2016,43(2)
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