滇中地区梁山组黏土岩锂富集作用分析及找矿预测

陈希; 田应贵; 程家龙; 李维忠; 耿齐卫; 蒋家明; 李昊; 吴帆

doi:10.13686/j.cnki.dzyzy.2023.06.007

滇中地区梁山组黏土岩锂富集作用分析及找矿预测

云南省地质矿产勘查院, 云南昆明 650051

基金项目:
云南地矿总公司(集团)科技创新项目"云南省锂资源找矿预测及靶区调查"(云地集团[2019]188号)

详细信息

作者简介: 陈希(1985-), 男, 高级工程师, 从事地质矿产勘查工作, 通信地址云南省昆明市盘龙区东风东路东风巷87号, E-mail//414569767@qq.com

通讯作者: 田应贵(1971-), 男, 高级地质工程师, 从事区域地质调查及矿产勘查工作, 通信地址云南省昆明市盘龙区东风东路东风巷87号, E-mail//437348841@qq.com

中图分类号: P618.7

收稿日期: 2022-11-14

修回日期: 2022-12-12

刊出日期: 2023-12-25

LITHIUM ENRICHMENT IN THE CLAY ROCKS OF LIANGSHAN FORMATION AND PROSPECTING PREDICTION IN CENTRAL YUNNAN PROVINCE

Yunnan Institute of Geology and Mineral Exploration, Kunming 650051, China

More Information

Corresponding author: TIAN Ying-gui, 437348841@qq.com

Received Date: 14 November 2022

Revised Date: 12 December 2022

Publish Date: 25 December 2023

摘要

摘要:
滇中地区中二叠统梁山组富锂黏土岩分布于梁山期滇中古陆东侧河口湾、滨海平原沼泽区的泥坪带. 梁山组黏土岩由4种岩性类型组成: 灰-灰褐色含铁铝土(矿)岩、灰白杂红色高岭石黏土岩、灰-灰绿色黏土岩、灰黑-黑色水云母碳质黏土岩. 研究发现, 半咸水向咸水转变、弱氧化-还原、低能、滞留局限的古地理环境有利于形成富锂黏土岩. 在稳定的大地构造环境, 温暖、潮湿的古气候, 丘陵为主的古地形条件下, 滇中古陆的寒武系-泥盆系镁质碳酸盐岩在次生风化作用下形成的富锂黏土, 经过搬运、沉积作用形成富锂黏土岩. 在昆明市东川-富民、玉溪市红塔-建水、丽江市永胜-宁蒗地区具较好的富锂黏土岩找矿潜力.
- 锂资源 /
- 黏土岩 /
- 岩相古地理 /
- 沉积相 /
- 找矿预测 /
- 云南省
Abstract:
The Li-rich clay rocks of Middle Permian Liangshan Formation in central Yunnan Province are distributed in the mudflat zone of estuary and coastal plain swamp area on the east side of central Yunnan archicontinent during Liangshan Period. The clay rocks of Liangshan Formation are composed of four lithologic types, including gray-greyish brown ferric bauxite rock, grayish white-red kaolinite clay rock, gray-greyish green clay rock, and gray black-black hydromica carbonaceous clay rock. It is found that the paleogeographical environment of brackish water transition to saline water, weak oxidation-reduction, low energy and limited retention is conducive to the formation of Li-rich clay rocks. Under the stable tectonic environment and the condition of warm-humid paleoclimate and hilly paleoterrain, the Cambrian-Devonian magnesian carbonate rocks in central Yunnan archicontinent form the Li-rich clay by secondary weathering, and then Li-rich clay rocks through transport and sedimentation. Dongchuan-Fumin of Kunming, Hongta-Jianshui of Yuxi and Yongsheng-Ninglang of Lijiang are prospect areas for Li-rich clay rocks.
- lithium resources /
- clay rock /
- lithofacies palaeogeography /
- sedimentary facies /
- prospecting prediction /
- Yunnan Province

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图 1 滇中地区中二叠世梁山期岩相古地理图

Figure 1.

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图 2 Ni/Co含量比值与Li₂O含量相关图

Figure 2.

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图 3 Ni与Li₂O含量相关图

Figure 3.

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图 4 滇中某地区中二叠世梁山期河口湾与滨海沼泽平原沉积岩相古地理图

Figure 4.

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图 5 富锂黏土岩纵向岩性变化及沉积环境示意图

Figure 5.

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图 6 滇中地区梁山组黏土岩锂富集模式简图

Figure 6.

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表 1 富锂黏土岩中主要矿物XRD分析结果表

Table 1. XRD analysis results of main minerals in Li-rich clay rocks

样品号	岩石名称	水云母	高岭石	软水铝石	锐钛矿	石英	赤铁矿	三水铝石	硬水铝石	Li₂O
BT4-R1	灰色豆状高岭石铝土岩	4.1	48.3	24.9	7.6	/	15.1	/	/	0.2751
BT35-R3	砖红色、灰色含水云母高岭石黏土岩	19.3	58.9	8.6	5.5	/	7.7	/	/	0.3808
BT36-R3	深灰色豆状铁质铝土岩	13.2	23.8	/	6.2	/	20.9	18.5	17.4	0.2293
BT39-R3	黑色含碳质水云母黏土岩	89.6	/	/	6.2	/	4.2	/	/	0.251
BT41-R2	灰色砖红色水云母黏土岩	92.7	/	/	5.1	/	2.2	/	/	0.289
BT41-R4	黑色碳质水云母高岭石黏土岩	31.4	62.8	/	3.7	/	2.1	/	/	0.4138
BT41-R5	黑色碳质水云母高岭石黏土岩	58.1	26.3	/	6.1	6.3	3.2	/	/	0.4787
BT43-R1	灰绿色鲕-豆状铝土岩	12.7	25.2	24.2	4.9	/	3.1	/	29.9	0.317
测试单位：自然资源部昆明矿产资源监督检测中心，2021-06. 含量单位：%.

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