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黄金科学技术 ›› 2023, Vol. 31 ›› Issue (3): 359-377.doi: 10.11872/j.issn.1005-2518.2023.03.137

• 矿产勘查与资源评价 •    下一篇

柴达木巴伦马海盆地锂稀有轻金属黏土型矿赋存特征

潘彤1(),陈建洲2,3(),丁成旺2,3,马玉亮2,3,梁辉4,张涛2,3,杜小春2,3   

  1. 1.青海省地质矿产勘查开发局,青海 西宁 810008
    2.青海省第四地质勘查院,青海 西宁 810001
    3.青海省页岩气资源重点实验室,青海 西宁 810001
    4.青海瞻远地质勘探有限责任公司,青海 西宁 810008
  • 收稿日期:2022-10-08 修回日期:2023-01-11 出版日期:2023-06-30 发布日期:2023-07-20
  • 通讯作者: 陈建洲 E-mail:pant66@163.com;qhchjzh@163.com
  • 作者简介:潘彤(1966-),男,青海乐都人,教授级高级工程师,从事区域成矿规律研究工作。pant66@163.com
  • 基金资助:
    青海省“昆仑英才·高端创新创业人才”计划项目、青海省地质矿产勘查开发局高层次人才培养项目“青海省沉积型锂矿成矿研究”(2023-3-18);企业地勘项目“青海省茫崖市巴伦马海稀有轻金属矿地质调查”和“ 青海省茫崖市巴伦马海稀有轻金属矿可利用性研究”联合资助

Occurrence Characteristics of Lithium Rare Light Metal Clay-type Deposits in Balunmahai Basin of Qaidam Basin

Tong PAN1(),Jianzhou CHEN2,3(),Chengwang DING2,3,Yuliang MA2,3,Hui LIANG4,Tao ZHANG2,3,Xiaochun DU2,3   

  1. 1.Qinghai Bureau of Geology and Mineral Exploration and Development, Xining 810008, Qinghai, China
    2.The Fourth Geological Exploration Institute of Qinghai Province, Xining 810001, Qinghai, China
    3.Qinghai Key Laboratory of Shale Gas Resources, Xining 810001, Qinghai, China
    4.Qinghai Zhanyuan Geological Exploration Co. , Ltd. , Xining 810008, Qinghai, China
  • Received:2022-10-08 Revised:2023-01-11 Online:2023-06-30 Published:2023-07-20
  • Contact: Jianzhou CHEN E-mail:pant66@163.com;qhchjzh@163.com

摘要:

为了查明黏土层中稀有金属矿的赋存形式、富集特征和分布范围,了解稀有轻金属矿组分变化特征,评价资源潜力,在柴达木巴伦马海盆地开展了以锂稀有轻金属为主攻矿种的地质调查评价工作。在全新统(Qh)、上更新统(Qp3)和中更新统(Qp2)圈定含矿黏土层3层,估算LiCl潜在资源总量可达114.41万t。选矿试验锂浸取率达到51%~55%。含矿黏土层厚度和Li、Rb、Cs含量变化稳定。锂以铁锰结合态为主,残渣态次之。黏土矿物以伊利石为主,Li、Rb和Cs含量与黏土含量呈正相关关系。本区黏土型锂矿中既有结构型锂,也有吸附型锂,是介于碳酸盐黏土型锂矿与火山岩黏土型锂矿之间的一类黏土型锂矿。首次针对黏土层开展了锂稀有轻金属矿的调查评价工作并发现了黏土型锂稀有轻金属资源,其与液体矿、固体盐矿相生相伴,是盐湖资源的重要组成部分。

关键词: 黏土型锂矿, 赋存特征, 沉积型锂矿, 稀有金属矿床, 资源潜力, 调查评价

Abstract:

In order to identify the occurrence, enrichment, storage conditions and distribution characteristics of rare metal ore in the clay layer,to study the sedimentary characteristics,variation law and metallogenic law of the Qaidam Basin,the evaluation of resource potential were studied in Balunhaima Basin of Qaidam Basin. The investigation and evaluation of lithium rare light metals as the main minerals in Balunmahai salt lake Basin of Qaidam Basin has been carried out, including drilling, sample collection and testing, statistical analysis of data, correlation of rock and ore-bearing clay layers, law summary and research work on the availability of ore-bearing clay. Three layers of ore-bearing clay layers were delineated in the Quaternary Holocene (Qh), Upper Pleistocene (Qp3) and Middle Pleistocene (Qp2). It is estimated that the total potential resources of LiCl can reach 1.1441 million tons, which is converted into the total potential resources of Li2O, Rb2O and Cs2O reaching 403 200 tons, 357 200 tons and 31 300 tons respectively.The lithium leaching rate reaches 51%~55% with 10% sulfuric acid concentration,25% pulp concentration,1 hour leaching time and 25 ℃ leaching temperature.The thickness of ore-bearing clay layer and the contents of Li,Rb and Cs are stable. Lithium is mainly composed of Fe-Mn binding state,followed by residue state,Rb and Cs are mainly composed of residue state.The clay minerals are mainly illite,and the contents of Li,Rb and Cs are positively correlated with the clay content. It is concluded that there are both structural lithium and adsorbed lithium in clay-type lithium deposits in this area,which is a kind of clay-type lithium deposits between carbonate clay-type lithium deposits and volcanic clay-type lithium deposits.This type is a new type in Balunmahai Basin,and the mining area has the conditions for extraction and utilization.In this paper,the investigation and evaluation of rare light metal lithium deposits were carried out for the first time in clay layer,and the clay-type lithium rare light metal resources were found.The orebody is associated with liquid ore and solid salt ore,which is an important part of salt lake resources.The research lays a foundation for the overall planning,development and efficient utilization of the evaluation area of the Balunmahai Basin.

Key words: clay-type lithium ore, occurrence characteristics, sedimentary lithium ore, rare metal deposits, resource potential, investigation and evaluation

中图分类号: 

  • P618.71

图1

柴达木马海盆地地质简图1.全新世沉积;2.上更新世沉积;3.中更新世沉积;4.下更新世沉积;5.干柴沟组;6.油沙山组;7.狮子沟组;8.现代湖水;9.实测地质界线及不整合地质界线;10.背斜轴;11.逆断层;12.推测断层;13.地层产状;14.调查评价区;15.剖面及编号"

图2

巴伦马海盆地地层综合柱状图(修改自马金元等,2010)"

表1

潜在资源估算各含矿黏土层块段指标参数"

黏土层编号样品数/个厚度/m面积/km2体重/(t·m-3湿度/%湿度校正系数
范围平均值范围平均值范围平均值范围平均值范围平均值
N80.51~5.682.590.126~1.9730.9452.06~2.122.0716.39~16.7516.6281.33~83.5483.38
N361.95~20.259.820.201~24.8415.0291.96~2.082.0616.12~19.3716.7282.11~83.8883.28
N100.78~6.003.480.329~4.0531.2452.05~2.102.0616.01~16.4616.3683.54~83.9983.64

图3

巴伦马海盆地评价区发育的不同颜色黏土层(a)灰褐色黏土;(b)灰绿色黏土;(c)黑色含炭黏土;(d)灰褐色+黑色含炭黏土"

图4

巴伦马海盆地评价区发育的不同组分黏土层(a)含石膏黏土;(b)含石盐黏土;(c)含粉砂黏土;(d)黑色含炭黏土"

表2

巴伦马海盆地评价区各类黏土层及含矿黏土层特征统计"

黏土层

分类

控制工程数/个

分布

深度/m

单工程或含矿黏土层厚度/mLiCl含量/(×10-6Rb2O含量/(×10-6Cs2O含量/(×10-6岩石组合、结构构造特征
最小值最大值平均值最小值最大值平均值最小值最大值平均值最小值最大值平均值
褐色黏土870~44.800.7222.3510.2243.09477.01352.2662.73215.40120.085.4019.7410.12岩石组合:灰褐色含石膏黏土、含粉砂黏土、含石盐黏土等
灰绿色黏土640.75~36.100.5410.104.14163.69447.09324.7348.23138.8891.284.2213.268.92岩石组合:灰绿色含石膏黏土、含粉砂黏土、含石盐黏土等

黑色含炭

黏土

380.45~42.100.5110.954.06160.63461.99345.4440.14134.5894.064.0413.268.84岩石组合:含石盐含炭黏土、含粉砂含炭黏土、含石膏含炭黏土、黑色含炭黏土等
含粉砂黏土673.40~40.300.8217.686.38228.51477.01331.5466.40154.20117.823.4215.2610.4岩石组合:灰褐、灰绿色含粉砂黏土、含炭含粉砂黏土、粉砂—黏土等
含石膏黏土702.10~35.100.7620.927.69245.72455.02356.4853.70155.56106.184.5613.289.09岩石组合:含石膏黏土、含粉砂石膏黏土、含石膏石盐黏土、含石膏含炭黏土等
含石盐黏土440~38.100.7022.804.56149.64517.02333.0644.40219.11103.073.5418.138.37岩石组合:灰褐、灰绿色含石盐黏土、含石膏石盐黏土、含粉砂石盐黏土等

N含矿

黏土层

13-0.5111.0512.55298.05422.16351.464.36140.68106.925.1113.268.84岩石组合:灰褐、灰绿色含石盐石膏黏土、灰黑色含炭黏土、棕褐色含石膏黏土、黑色含粉砂含炭黏土等;结构构造:不含夹石,结构简单,属于中厚含矿黏土层,大部分可采,多为粉砂泥质结构,松散

N含矿

黏土层

87-0.8230.4014.11204.78624.85346.9461.90151.06107.555.0113.269.32岩石组合:灰褐—灰绿—灰黑色含石膏黏土、灰褐—灰绿—灰黑色含石盐黏土、灰褐—灰绿色含粉砂黏土、含石膏—含石盐—含粉砂黑色含炭黏土;结构构造:全区可采,含矿黏土层较为稳定,厚度较大,属于中厚含矿黏土层,含夹石多为1层,局部3~5层,结构为简单—较简单含矿黏土层,多为粉砂泥质结构、泥质结构,松散

N含矿

黏土层

14-0.608.002.9238.20478.80348.3472.90153.10111.85.4913.019.32岩石组合:灰褐色含粉砂黏土、灰褐色含石膏石盐黏土、灰褐色含石膏粉砂黏土、灰绿色含石膏粉砂黏土;结构构造:大部分可采,不含夹石,结构简单,多为粉砂泥质结构,松散

图5

NⅣ含矿黏土层特征参数等值线图(a)NⅣ含矿黏土层分布及厚度等值线图;(b)NⅣ含矿黏土层LiCl含量等值线图"

图6

NⅢ含矿黏土层特征参数等值线图(a)NⅢ含矿黏土层分布及厚度等值线图;(b)NⅢ含矿黏土层LiCl含量等值线图"

图7

含矿黏土层与石盐层厚度对比图(a)含矿黏土层厚度等值线图;(b)石盐层厚度等值线图"

图8

南北卤渠中各层位垂向厚度变化特征1.黑色含炭黏土;2.灰绿色黏土;3.深褐色黏土;4.灰褐色含粉砂石盐;5.浅黄色含石盐粉砂"

图9

卤渠中D6点处黏土层位影像"

图10

巴伦马海盆地评价区B-B′剖面示意图1.钻孔位置及编号;2.地层时代代号;3.含矿黏土层编号"

图11

巴伦马海盆地评价区80线纵剖面示意图1.钻孔位置及编号;2.地层时代代号;3.含矿黏土层编号"

图12

巴伦马海盆地评价区稀有轻金属元素含量变化图"

表3

稀有金属元素在不同介质内的含量变化特征"

类别含量指标LiRbCsLi2ORb2OCs2O
全区最大值93.80174.0017.60201.90190.2918.66
最小值2.934.280.306.314.680.32
平均值49.8489.717.61107.2898.118.07
粉砂层最大值71.80118.007.90154.55129.058.38
最小值12.4030.601.3026.6933.471.38
平均值31.7775.253.5168.3882.303.72
石盐层最大值46.3098.803.5099.66108.053.71
最小值2.934.280.306.314.680.32
平均值18.4438.511.5239.6942.121.62
全区黏土层最大值92.50174.0016.30199.11190.2917.28
最小值19.3022.401.0041.5424.501.06
平均值56.3599.188.92121.29108.479.46
灰褐色黏土最大值92.20174.0017.60198.46190.2918.66
最小值24.5040.601.0052.7444.401.06
平均值57.58107.099.28123.94117.129.84
灰绿色黏土最大值86.50142.0014.20186.19155.3015.05
最小值21.3025.002.6445.8527.342.80
平均值53.1283.098.36114.3490.878.86
黑色含炭黏土最大值92.50143.0014.20199.11156.3915.05
最小值19.3022.401.8741.5424.501.98
平均值54.8485.678.31118.0493.698.81
含粉砂黏土最大值84.90174.0016.30182.75190.2917.28
最小值26.8042.803.8757.6946.814.10
平均值54.75107.289.79117.85117.3310.38
含石膏黏土最大值93.80164.0015.80201.90179.3616.75
最小值21.3039.202.6045.8542.872.76
平均值57.8897.028.55124.59106.109.06
含石盐黏土最大值91.80162.0014.20197.60177.1715.05
最小值23.9025.002.6451.4427.342.80
平均值56.2693.637.86121.10102.408.33

表4

含矿黏土样品矿物含量"

矿物名称灰褐色黏土+灰绿色黏土+黑色含炭黏土黑色含炭黏土灰褐色黏土+灰绿色黏土
石膏19.119.64.9
石盐18.014.919.5
石英20.020.320.8
文石3.205.0
斜长石5.65.78.3
菱铁矿000
光卤石4.63.47.4
白云石2.43.63.2
方解石3.63.25.6
黄铁矿1.20.21.7
黏土矿物22.329.223.6

图13

6号样黏土矿物X射线衍射分析图谱"

表5

黏土矿物相对含量"

样品编号黏土矿物相对含量
伊蒙混层伊利石高岭石绿泥石
6号样1660915
7号样2160712
8号样1464814

表6

7号样综合样品的中稀有金属元素的化学物相分析结果"

化学物相态LiRbCs

含量

/(×10-6

分配率

/%

含量

/(×10-6

分配率

/%

含量

/(×10-6

分配率

/%

总量111.12100.0051.17100.004.27100.00
离子结合态5.695.120.571.120.000.00
碳酸盐结合态5.725.150.761.480.000.00
铁锰结合态75.9168.315.3510.460.286.62
有机结合态4.233.812.675.210.9622.60
残渣态19.5717.6141.8281.733.0270.79

表7

样品元素相关关系矩阵"

LiBeNaMgAlSiSKCaMnFeCoNiCuZnRbCs
Li1
Be0.15161
Na0.11570.01591
Mg0.75130.12490.16111
Al0.79390.15980.14740.73261
Si0.77230.16410.16220.70360.89751
S0.49460.09920.25040.47790.58990.58601
K0.79500.16350.22090.71390.88930.86780.52131
Ca-0.4988-0.1011-0.2709-0.4829-0.5851-0.5807-0.9398-0.53591
Mn0.45170.07350.09550.49880.40940.41240.29290.40560.29751
Fe0.55650.083330.08340.77330.48500.45930.34000.43990.36200.45421
Co0.33480.05640.05740.30820.279230.28400.18210.28270.18380.21330.27271
Ni0.40820.076780.03130.40650.35800.343810.23080.34290.21940.21280.34260.18051
Cu0.24610.04687-0.00230.24570.21180.20730.12740.21460.15450.14860.25280.12100.13231
Zn0.18730.01353-0.07410.319820.12390.1077-0.00910.10310.03730.17520.37740.09930.13720.08091
Rb0.58450.12490.10700.48020.63400.62050.40610.65850.40320.29790.29330.22420.28450.16100.05111
Cs0.74280.14140.10540.57450.70280.70710.44030.74090.43240.36070.37600.32690.35490.22420.10330.59021

图14

Li-Si-Al-K元素线扫描含量变化图解(a)Li-Si元素线扫描含量变化图;(b)Li-Al元素线扫描含量变化图;(c)Li-K元素线扫描含量变化图"

表8

原矿粒度筛析结果"

样品类型粒级/mm产品产率/%品位/(×10-6回收率/%
LiRbCsLiRbCs
混合样品-1.000+0.33557.0571.4963.355.8657.9554.0153.74
-0.335+0.20013.7873.5769.116.8914.4114.2315.27
-0.200+0.1257.7286.2569.946.719.468.068.33
-0.125+0.1004.1560.3866.736.193.564.144.13
-0.100+0.0743.8060.7470.766.223.284.023.80
-0.074+0.0386.1052.6374.316.274.566.786.15
-0.0387.4164.4579.187.216.788.768.59
原矿100.0070.3766.926.22100.00100.00100.00
黑色含炭黏土-1.000+0.33560.9668.1561.075.9659.9957.5957.74
-0.335+0.20014.1963.3266.916.4112.9714.6914.45
-0.200+0.1256.78103.6272.947.6910.157.658.29
-0.125+0.1003.7467.4565.386.293.643.783.74
-0.100+0.0743.4766.9567.086.443.353.603.55
-0.074+0.0385.1763.5768.966.584.755.525.41
-0.0385.6862.6781.527.565.147.176.83
原矿100.0069.2564.646.29100.00100.00100.00

表9

柴达木盆地盐湖类矿床类型对比"

分类特征

成矿

作用

成矿

地质体

矿体形状及规模矿石结构构造(水化学类型)矿石矿物有用组分的赋存形式
第四纪现代盐湖矿床蒸发沉积作用盐湖卤水、盐岩

形状:盐湖盆地控制液相,固

体呈似层状、透镜状;规模:

大型、超大型

固液相共存,以液相为主。

固相呈自形、半自形结构,

粒状、块状、层状构造

KCl、NaCl、MgCl2、MgSO4等,钾石盐、光卤石、石盐、芒硝

晶间卤水、孔隙卤水;

盐类矿物

砂砾孔隙卤水矿床化学沉积作用承压卤水

形状:由含水层控制;

规模:小型、中型、大型

液相KCl、NaCl、MgCl2、MgSO4

晶间卤水、孔隙卤水、

裂隙水

古近纪—新近纪盐类矿床化学沉积作用盐岩

形状:似层状、层状、透镜状;

规模:小型、中型、大型、超大型

固相,自形、半自形结构,粒

状、块状、层状构造

天青石、菱锶矿、石膏、石盐盐类矿物
黏土型矿床沉积吸附作用黏土层

形状:似层状、层状;

规模:大型、超大型

固相,粉砂泥质结构、泥质

结构,松散

含Li、Rb、Cs、Sr、B的伊利石、绿泥石、高岭石、伊蒙混层

吸附于黏土矿物中或

赋存于矿物晶格中,与

黏土矿物含量呈正比

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