地学前缘 ›› 2020, Vol. 27 ›› Issue (4): 244-254.DOI: 10.13745/j.esf.sf.2019.8.20
李成禄1(), 于援帮1, 袁茂文2, 李胜荣2, 徐文喜1, 朱静3, 李士胜2
收稿日期:
2019-01-15
修回日期:
2019-05-21
出版日期:
2020-07-25
发布日期:
2020-07-25
作者简介:
李成禄(1984—),男,博士,高级工程师,主要从事金矿矿产勘查及研究工作。E-mail: lcl230881@163.com
基金资助:
LI Chenglu1(), YU Yuanbang1, YUAN Maowen2, LI Shengrong2, XU Wenxi1, ZHU Jing3, LI Shisheng2
Received:
2019-01-15
Revised:
2019-05-21
Online:
2020-07-25
Published:
2020-07-25
摘要:
永新金矿床是早白垩世晚期形成的浅成低温热液型金矿床。对其主要金银系列矿物和碲化物研究显示:金银系列矿物中Au质量分数为65.092%~90.713%(平均为83.942%),Ag为5.652%~16.632%(平均为11.285%);以自然金和银金矿为主,成色集中在870.2~941.3(平均为881.1),主要以包体金、粒间金和裂隙金的形式存在,粒径集中在10~20 μm;碲化物主要有辉碲铋矿、碲金银矿、碲银矿和碲铅矿等,以碲银矿数量最多,主要包裹于黄铁矿内部或产于裂隙中,常与自然金和方铅矿连生,粒径多为5~20 μm。综合研究碲化物组合特征、不同标高金矿物的成色、Te/Au值等认为,永新金矿床碲化物形成时成矿流体的lgf(Te2)介于-15.2~-9.4范围,lgf(S2)介于-16.7~-14.0范围,矿床与火山或次火山热液有关,具备中浅成成矿特征,深部尚有较大成矿潜力。
中图分类号:
李成禄, 于援帮, 袁茂文, 李胜荣, 徐文喜, 朱静, 李士胜. 大兴安岭东北部永新金矿床金银系列矿物和碲化物的发现及其意义[J]. 地学前缘, 2020, 27(4): 244-254.
LI Chenglu, YU Yuanbang, YUAN Maowen, LI Shengrong, XU Wenxi, ZHU Jing, LI Shisheng. Discovery and geological significance of gold-silver bearing minerals and tellurides in the Yongxin gold deposit in the northeastern Great Xing'an Range[J]. Earth Science Frontiers, 2020, 27(4): 244-254.
图1 永新金矿床位置(a)及矿区地质图(b) 1—白垩纪流纹岩及流纹质晶屑凝灰岩等酸性火山岩; 2—白垩纪安山岩、安粗岩等中酸性火山岩; 3—中侏罗世花岗闪长岩; 4—晚石炭世—早二叠世花岗岩; 5—糜棱岩; 6—闪长玢岩; 7—花岗斑岩; 8—微晶闪长岩; 9—金矿体。
Fig.1 Geotectonic background (a) and geological map (b) of the Yongxin gold deposit
图2 永新金矿床金矿物赋存状态及共生矿物组合显微照片 a,b,c—包体金包裹于黄铁矿内部;d,e,f—裂隙金产于黄铁矿裂隙中;g,h—粒间金产于黄铁矿边部;i—包体金产于石英内部。Py—黄铁矿;Au—金矿物;Hes—碲银矿;Alt—碲铅矿;Qtz—石英。
Fig.2 Typical photomicrograph showing gold mineral occurrence and mineral assemblage in the Yongxin gold deposit
序号 | 样号 | wB/% | 成色 | 单矿物 | 标高/m | 赋存状态 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Se | As | Ge | S | Pb | Bi | Sb | Fe | Cu | Zn | Te | Ag | Au | Ni | Co | Total | ||||||
1 | 14005-2g141 | 0.022 | 0.502 | 1.076 | 0.004 | 0.082 | 0.349 | 12.209 | 84.977 | 0.097 | 0.089 | 99.407 | 874.4 | 自然金 | 420 | 裂隙金 | |||||
2 | 17006-1g151 | 0.201 | 0.676 | 0.033 | 1.782 | 0.045 | 11.606 | 84.799 | 0.006 | 99.148 | 879.6 | 自然金 | 410 | 包裹金 | |||||||
3 | 17006-1g152 | 0.133 | 0.651 | 2.207 | 0.033 | 0.033 | 8.353 | 88.521 | 0.025 | 99.956 | 913.8 | 自然金 | 410 | 包裹金 | |||||||
4 | 17006-1g152 | 5.555 | 0.581 | 0.031 | 5.572 | 11.337 | 75.973 | 0.009 | 99.058 | 870.2 | 自然金 | 410 | 包裹金 | ||||||||
5 | 17006-1g159 | 0.044 | 2.773 | 0.407 | 0.010 | 3.464 | 0.023 | 0.021 | 0.014 | 11.161 | 81.193 | 0.014 | 99.124 | 879.1 | 自然金 | 410 | 包裹金 | ||||
6 | 17006-1g1510 | 0.024 | 6.666 | 0.351 | 6.524 | 0.021 | 9.096 | 76.313 | 0.027 | 0.023 | 99.045 | 893.5 | 自然金 | 410 | 包裹金 | ||||||
7 | 17006-1g131 | 0.108 | 0.667 | 1.221 | 0.010 | 0.023 | 11.079 | 86.555 | 0.038 | 99.701 | 886.5 | 自然金 | 410 | 包裹金 | |||||||
8 | 17006-1g121 | 0.005 | 0.018 | 10.784 | 0.446 | 9.369 | 0.002 | 0.024 | 12.401 | 67.386 | 0.010 | 100.445 | 844.6 | 银金矿 | 410 | 裂隙金 | |||||
9 | 17001-3g211 | 0.319 | 0.545 | 0.003 | 2.794 | 0.011 | 0.073 | 9.097 | 86.564 | 99.406 | 904.9 | 自然金 | 340 | 包裹金 | |||||||
10 | 17001-3g231 | 0.027 | 0.648 | 0.003 | 0.905 | 0.009 | 0.111 | 10.442 | 87.568 | 0.053 | 0.002 | 99.768 | 893.5 | 自然金 | 340 | 裂隙金 | |||||
11 | 17001-3g232 | 0.024 | 0.037 | 0.573 | 1.343 | 0.060 | 0.021 | 9.808 | 87.605 | 0.038 | 99.509 | 899.3 | 自然金 | 340 | 裂隙金 | ||||||
12 | 17001-3g233 | 0.108 | 0.735 | 0.015 | 1.753 | 0.019 | 7.970 | 88.589 | 99.189 | 917.5 | 自然金 | 340 | 裂隙金 | ||||||||
13 | 17001-3g234 | 0.029 | 0.593 | 2.353 | 0.008 | 0.020 | 0.047 | 9.695 | 86.506 | 0.033 | 99.284 | 899.2 | 自然金 | 340 | 包裹金 | ||||||
14 | 17001-3g511 | 0.010 | 0.110 | 0.597 | 1.672 | 0.042 | 10.905 | 86.125 | 0.017 | 0.018 | 99.496 | 887.6 | 自然金 | 340 | 裂隙金 | ||||||
15 | 18003-3g141 | 0.662 | 0.449 | 3.503 | 16.632 | 78.412 | 99.658 | 825.0 | 银金矿 | 300 | 裂隙金 | ||||||||||
16 | 18003-3g149 | 0.006 | 0.013 | 1.748 | 0.424 | 3.566 | 0.024 | 0.082 | 14.128 | 79.919 | 0.017 | 99.927 | 849.8 | 银金矿 | 300 | 裂隙金 | |||||
17 | 18003-3g142 | 0.053 | 0.653 | 2.369 | 0.042 | 0.033 | 15.297 | 81.493 | 0.028 | 0.001 | 99.969 | 842.0 | 银金矿 | 300 | 裂隙金 | ||||||
18 | 18003-3g1477 | 0.051 | 0.588 | 1.447 | 0.002 | 0.021 | 15.058 | 82.255 | 0.048 | 99.470 | 845.3 | 银金矿 | 300 | 裂隙金 | |||||||
19 | 18003-3g148 | 2.378 | 1.709 | 0.081 | 3.484 | 0.043 | 0.044 | 14.896 | 76.648 | 99.283 | 837.3 | 银金矿 | 300 | 包裹金 | |||||||
20 | 18010-1g111 | 0.009 | 0.551 | 0.016 | 1.437 | 0.063 | 11.606 | 85.974 | 0.045 | 99.701 | 881.1 | 自然金 | 280 | 裂隙金 | |||||||
21 | 18010-1g112 | 0.054 | 0.684 | 2.170 | 0.010 | 0.041 | 12.168 | 84.339 | 0.024 | 99.490 | 873.9 | 自然金 | 280 | 裂隙金 | |||||||
22 | 18010-1g113 | 0.084 | 4.187 | 19.224 | 2.310 | 0.026 | 0.066 | 8.891 | 65.092 | 99.880 | 879.8 | 自然金 | 280 | 裂隙金 | |||||||
23 | 18010-1g116 | 0.067 | 0.544 | 2.567 | 0.016 | 0.122 | 10.882 | 84.975 | 0.010 | 0.046 | 99.229 | 886.5 | 自然金 | 280 | 包裹金 | ||||||
24 | 18011-1g141 | 0.017 | 0.085 | 0.588 | 0.949 | 0.004 | 9.096 | 89.018 | 0.006 | 99.763 | 907.3 | 自然金 | 230 | 粒间金 | |||||||
25 | 18011-1g111 | 0.004 | 0.070 | 0.476 | 0.055 | 0.408 | 0.041 | 0.033 | 12.345 | 86.918 | 0.035 | 0.001 | 100.386 | 875.6 | 自然金 | 230 | 裂隙金 | ||||
26 | 18011-1g112 | 0.002 | 0.610 | 0.323 | 0.014 | 0.113 | 8.700 | 89.173 | 0.092 | 0.024 | 99.051 | 911.1 | 自然金 | 230 | 包裹金 | ||||||
27 | 18005-5g121 | 0.004 | 0.021 | 0.438 | 2.103 | 0.027 | 0.145 | 9.435 | 87.726 | 0.051 | 0.047 | 99.997 | 902.9 | 自然金 | 225 | 包裹金 | |||||
28 | 18005-5g111 | 0.086 | 0.532 | 1.405 | 0.002 | 0.014 | 9.140 | 88.167 | 0.008 | 99.354 | 906.1 | 自然金 | 225 | 包裹金 | |||||||
29 | 18005-5g112 | 0.005 | 0.099 | 0.356 | 2.176 | 0.011 | 10.020 | 86.392 | 99.059 | 896.1 | 自然金 | 225 | 包裹金 | ||||||||
30 | 18005-5g161 | 0.043 | 0.045 | 0.466 | 0.017 | 0.888 | 0.033 | 10.519 | 87.348 | 0.003 | 99.362 | 892.5 | 自然金 | 225 | 裂隙金 | ||||||
31 | 17508-1g153 | 0.008 | 0.580 | 1.622 | 0.009 | 0.044 | 12.281 | 85.000 | 0.069 | 0.024 | 99.637 | 873.8 | 自然金 | 200 | 裂隙金 | ||||||
32 | 17508-1g154 | 0.018 | 0.679 | 1.178 | 13.700 | 84.332 | 0.005 | 99.912 | 860.2 | 自然金 | 200 | 裂隙金 | |||||||||
33 | 17508-1g156 | 0.029 | 0.563 | 2.229 | 0.105 | 0.068 | 11.574 | 85.723 | 0.035 | 100.326 | 881.0 | 自然金 | 200 | 粒间金 | |||||||
34 | 17508-1g141 | 0.008 | 0.091 | 0.595 | 1.835 | 0.060 | 12.681 | 84.521 | 0.043 | 99.834 | 869.5 | 自然金 | 200 | 裂隙金 | |||||||
35 | 17508-1g111 | 0.111 | 0.590 | 2.999 | 0.351 | 12.334 | 82.936 | 0.033 | 0.027 | 99.381 | 870.5 | 自然金 | 200 | 裂隙金 | |||||||
36 | 17508-1g113 | 0.003 | 0.069 | 0.684 | 2.955 | 0.005 | 5.652 | 90.713 | 0.017 | 0.012 | 100.110 | 941.3 | 自然金 | 200 | 包裹金 | ||||||
37 | 18017-2g141 | 0.002 | 0.012 | 0.527 | 0.304 | 0.024 | 0.016 | 11.922 | 86.600 | 99.407 | 879.0 | 自然金 | 120 | 包裹金 | |||||||
38 | 18017-2g142 | 0.020 | 0.035 | 0.651 | 1.258 | 12.121 | 85.843 | 0.005 | 99.933 | 876.3 | 自然金 | 120 | 裂隙金 | ||||||||
39 | 18017-2g161 | 0.064 | 0.545 | 1.241 | 0.019 | 11.907 | 86.061 | 0.009 | 99.846 | 878.5 | 自然金 | 120 | 裂隙金 | ||||||||
40 | 18017-2g181 | 0.002 | 2.497 | 0.335 | 4.393 | 0.030 | 0.044 | 11.706 | 80.468 | 0.018 | 99.493 | 873.0 | 自然金 | 120 | 包裹金 | ||||||
41 | 18017-2g1151 | 0.145 | 0.600 | 1.498 | 0.087 | 12.505 | 85.509 | 0.004 | 100.348 | 872.4 | 自然金 | 120 | 裂隙金 | ||||||||
42 | 18017-2g1152 | 0.006 | 0.041 | 0.507 | 1.272 | 0.031 | 9.980 | 87.196 | 0.028 | 99.061 | 897.3 | 自然金 | 120 | 裂隙金 | |||||||
43 | 18017-2g1154 | 0.008 | 0.535 | 2.267 | 0.007 | 0.013 | 11.011 | 85.182 | 99.023 | 885.5 | 自然金 | 120 | 裂隙金 | ||||||||
44 | 18017-2g1155 | 0.332 | 0.557 | 1.948 | 9.249 | 87.146 | 0.052 | 99.284 | 904.1 | 自然金 | 120 | 包裹金 | |||||||||
45 | 18017-2g1111 | 0.008 | 0.006 | 0.559 | 0.033 | 1.885 | 0.022 | 10.921 | 85.896 | 99.330 | 887.2 | 自然金 | 120 | 包裹金 | |||||||
46 | 18017-2g121 | 0.011 | 0.030 | 0.577 | 0.083 | 0.766 | 0.027 | 10.333 | 87.960 | 0.063 | 0.008 | 99.858 | 894.9 | 自然金 | 120 | 粒间金 | |||||
47 | 18017-2g131 | 0.119 | 0.509 | 0.012 | 1.767 | 0.042 | 11.562 | 85.418 | 0.002 | 99.431 | 880.8 | 自然金 | 120 | 包裹金 | |||||||
48 | 18021-1g121 | 0.030 | 0.034 | 5.597 | 0.682 | 0.028 | 6.376 | 0.083 | 16.278 | 70.198 | 0.016 | 0.028 | 99.350 | 811.8 | 银金矿 | 115 | 裂隙金 |
表1 永新金矿床金矿物电子探针分析结果
Table 1 Results of electron microprobe analysis of gold minerals in the Yongxin gold deposit
序号 | 样号 | wB/% | 成色 | 单矿物 | 标高/m | 赋存状态 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Se | As | Ge | S | Pb | Bi | Sb | Fe | Cu | Zn | Te | Ag | Au | Ni | Co | Total | ||||||
1 | 14005-2g141 | 0.022 | 0.502 | 1.076 | 0.004 | 0.082 | 0.349 | 12.209 | 84.977 | 0.097 | 0.089 | 99.407 | 874.4 | 自然金 | 420 | 裂隙金 | |||||
2 | 17006-1g151 | 0.201 | 0.676 | 0.033 | 1.782 | 0.045 | 11.606 | 84.799 | 0.006 | 99.148 | 879.6 | 自然金 | 410 | 包裹金 | |||||||
3 | 17006-1g152 | 0.133 | 0.651 | 2.207 | 0.033 | 0.033 | 8.353 | 88.521 | 0.025 | 99.956 | 913.8 | 自然金 | 410 | 包裹金 | |||||||
4 | 17006-1g152 | 5.555 | 0.581 | 0.031 | 5.572 | 11.337 | 75.973 | 0.009 | 99.058 | 870.2 | 自然金 | 410 | 包裹金 | ||||||||
5 | 17006-1g159 | 0.044 | 2.773 | 0.407 | 0.010 | 3.464 | 0.023 | 0.021 | 0.014 | 11.161 | 81.193 | 0.014 | 99.124 | 879.1 | 自然金 | 410 | 包裹金 | ||||
6 | 17006-1g1510 | 0.024 | 6.666 | 0.351 | 6.524 | 0.021 | 9.096 | 76.313 | 0.027 | 0.023 | 99.045 | 893.5 | 自然金 | 410 | 包裹金 | ||||||
7 | 17006-1g131 | 0.108 | 0.667 | 1.221 | 0.010 | 0.023 | 11.079 | 86.555 | 0.038 | 99.701 | 886.5 | 自然金 | 410 | 包裹金 | |||||||
8 | 17006-1g121 | 0.005 | 0.018 | 10.784 | 0.446 | 9.369 | 0.002 | 0.024 | 12.401 | 67.386 | 0.010 | 100.445 | 844.6 | 银金矿 | 410 | 裂隙金 | |||||
9 | 17001-3g211 | 0.319 | 0.545 | 0.003 | 2.794 | 0.011 | 0.073 | 9.097 | 86.564 | 99.406 | 904.9 | 自然金 | 340 | 包裹金 | |||||||
10 | 17001-3g231 | 0.027 | 0.648 | 0.003 | 0.905 | 0.009 | 0.111 | 10.442 | 87.568 | 0.053 | 0.002 | 99.768 | 893.5 | 自然金 | 340 | 裂隙金 | |||||
11 | 17001-3g232 | 0.024 | 0.037 | 0.573 | 1.343 | 0.060 | 0.021 | 9.808 | 87.605 | 0.038 | 99.509 | 899.3 | 自然金 | 340 | 裂隙金 | ||||||
12 | 17001-3g233 | 0.108 | 0.735 | 0.015 | 1.753 | 0.019 | 7.970 | 88.589 | 99.189 | 917.5 | 自然金 | 340 | 裂隙金 | ||||||||
13 | 17001-3g234 | 0.029 | 0.593 | 2.353 | 0.008 | 0.020 | 0.047 | 9.695 | 86.506 | 0.033 | 99.284 | 899.2 | 自然金 | 340 | 包裹金 | ||||||
14 | 17001-3g511 | 0.010 | 0.110 | 0.597 | 1.672 | 0.042 | 10.905 | 86.125 | 0.017 | 0.018 | 99.496 | 887.6 | 自然金 | 340 | 裂隙金 | ||||||
15 | 18003-3g141 | 0.662 | 0.449 | 3.503 | 16.632 | 78.412 | 99.658 | 825.0 | 银金矿 | 300 | 裂隙金 | ||||||||||
16 | 18003-3g149 | 0.006 | 0.013 | 1.748 | 0.424 | 3.566 | 0.024 | 0.082 | 14.128 | 79.919 | 0.017 | 99.927 | 849.8 | 银金矿 | 300 | 裂隙金 | |||||
17 | 18003-3g142 | 0.053 | 0.653 | 2.369 | 0.042 | 0.033 | 15.297 | 81.493 | 0.028 | 0.001 | 99.969 | 842.0 | 银金矿 | 300 | 裂隙金 | ||||||
18 | 18003-3g1477 | 0.051 | 0.588 | 1.447 | 0.002 | 0.021 | 15.058 | 82.255 | 0.048 | 99.470 | 845.3 | 银金矿 | 300 | 裂隙金 | |||||||
19 | 18003-3g148 | 2.378 | 1.709 | 0.081 | 3.484 | 0.043 | 0.044 | 14.896 | 76.648 | 99.283 | 837.3 | 银金矿 | 300 | 包裹金 | |||||||
20 | 18010-1g111 | 0.009 | 0.551 | 0.016 | 1.437 | 0.063 | 11.606 | 85.974 | 0.045 | 99.701 | 881.1 | 自然金 | 280 | 裂隙金 | |||||||
21 | 18010-1g112 | 0.054 | 0.684 | 2.170 | 0.010 | 0.041 | 12.168 | 84.339 | 0.024 | 99.490 | 873.9 | 自然金 | 280 | 裂隙金 | |||||||
22 | 18010-1g113 | 0.084 | 4.187 | 19.224 | 2.310 | 0.026 | 0.066 | 8.891 | 65.092 | 99.880 | 879.8 | 自然金 | 280 | 裂隙金 | |||||||
23 | 18010-1g116 | 0.067 | 0.544 | 2.567 | 0.016 | 0.122 | 10.882 | 84.975 | 0.010 | 0.046 | 99.229 | 886.5 | 自然金 | 280 | 包裹金 | ||||||
24 | 18011-1g141 | 0.017 | 0.085 | 0.588 | 0.949 | 0.004 | 9.096 | 89.018 | 0.006 | 99.763 | 907.3 | 自然金 | 230 | 粒间金 | |||||||
25 | 18011-1g111 | 0.004 | 0.070 | 0.476 | 0.055 | 0.408 | 0.041 | 0.033 | 12.345 | 86.918 | 0.035 | 0.001 | 100.386 | 875.6 | 自然金 | 230 | 裂隙金 | ||||
26 | 18011-1g112 | 0.002 | 0.610 | 0.323 | 0.014 | 0.113 | 8.700 | 89.173 | 0.092 | 0.024 | 99.051 | 911.1 | 自然金 | 230 | 包裹金 | ||||||
27 | 18005-5g121 | 0.004 | 0.021 | 0.438 | 2.103 | 0.027 | 0.145 | 9.435 | 87.726 | 0.051 | 0.047 | 99.997 | 902.9 | 自然金 | 225 | 包裹金 | |||||
28 | 18005-5g111 | 0.086 | 0.532 | 1.405 | 0.002 | 0.014 | 9.140 | 88.167 | 0.008 | 99.354 | 906.1 | 自然金 | 225 | 包裹金 | |||||||
29 | 18005-5g112 | 0.005 | 0.099 | 0.356 | 2.176 | 0.011 | 10.020 | 86.392 | 99.059 | 896.1 | 自然金 | 225 | 包裹金 | ||||||||
30 | 18005-5g161 | 0.043 | 0.045 | 0.466 | 0.017 | 0.888 | 0.033 | 10.519 | 87.348 | 0.003 | 99.362 | 892.5 | 自然金 | 225 | 裂隙金 | ||||||
31 | 17508-1g153 | 0.008 | 0.580 | 1.622 | 0.009 | 0.044 | 12.281 | 85.000 | 0.069 | 0.024 | 99.637 | 873.8 | 自然金 | 200 | 裂隙金 | ||||||
32 | 17508-1g154 | 0.018 | 0.679 | 1.178 | 13.700 | 84.332 | 0.005 | 99.912 | 860.2 | 自然金 | 200 | 裂隙金 | |||||||||
33 | 17508-1g156 | 0.029 | 0.563 | 2.229 | 0.105 | 0.068 | 11.574 | 85.723 | 0.035 | 100.326 | 881.0 | 自然金 | 200 | 粒间金 | |||||||
34 | 17508-1g141 | 0.008 | 0.091 | 0.595 | 1.835 | 0.060 | 12.681 | 84.521 | 0.043 | 99.834 | 869.5 | 自然金 | 200 | 裂隙金 | |||||||
35 | 17508-1g111 | 0.111 | 0.590 | 2.999 | 0.351 | 12.334 | 82.936 | 0.033 | 0.027 | 99.381 | 870.5 | 自然金 | 200 | 裂隙金 | |||||||
36 | 17508-1g113 | 0.003 | 0.069 | 0.684 | 2.955 | 0.005 | 5.652 | 90.713 | 0.017 | 0.012 | 100.110 | 941.3 | 自然金 | 200 | 包裹金 | ||||||
37 | 18017-2g141 | 0.002 | 0.012 | 0.527 | 0.304 | 0.024 | 0.016 | 11.922 | 86.600 | 99.407 | 879.0 | 自然金 | 120 | 包裹金 | |||||||
38 | 18017-2g142 | 0.020 | 0.035 | 0.651 | 1.258 | 12.121 | 85.843 | 0.005 | 99.933 | 876.3 | 自然金 | 120 | 裂隙金 | ||||||||
39 | 18017-2g161 | 0.064 | 0.545 | 1.241 | 0.019 | 11.907 | 86.061 | 0.009 | 99.846 | 878.5 | 自然金 | 120 | 裂隙金 | ||||||||
40 | 18017-2g181 | 0.002 | 2.497 | 0.335 | 4.393 | 0.030 | 0.044 | 11.706 | 80.468 | 0.018 | 99.493 | 873.0 | 自然金 | 120 | 包裹金 | ||||||
41 | 18017-2g1151 | 0.145 | 0.600 | 1.498 | 0.087 | 12.505 | 85.509 | 0.004 | 100.348 | 872.4 | 自然金 | 120 | 裂隙金 | ||||||||
42 | 18017-2g1152 | 0.006 | 0.041 | 0.507 | 1.272 | 0.031 | 9.980 | 87.196 | 0.028 | 99.061 | 897.3 | 自然金 | 120 | 裂隙金 | |||||||
43 | 18017-2g1154 | 0.008 | 0.535 | 2.267 | 0.007 | 0.013 | 11.011 | 85.182 | 99.023 | 885.5 | 自然金 | 120 | 裂隙金 | ||||||||
44 | 18017-2g1155 | 0.332 | 0.557 | 1.948 | 9.249 | 87.146 | 0.052 | 99.284 | 904.1 | 自然金 | 120 | 包裹金 | |||||||||
45 | 18017-2g1111 | 0.008 | 0.006 | 0.559 | 0.033 | 1.885 | 0.022 | 10.921 | 85.896 | 99.330 | 887.2 | 自然金 | 120 | 包裹金 | |||||||
46 | 18017-2g121 | 0.011 | 0.030 | 0.577 | 0.083 | 0.766 | 0.027 | 10.333 | 87.960 | 0.063 | 0.008 | 99.858 | 894.9 | 自然金 | 120 | 粒间金 | |||||
47 | 18017-2g131 | 0.119 | 0.509 | 0.012 | 1.767 | 0.042 | 11.562 | 85.418 | 0.002 | 99.431 | 880.8 | 自然金 | 120 | 包裹金 | |||||||
48 | 18021-1g121 | 0.030 | 0.034 | 5.597 | 0.682 | 0.028 | 6.376 | 0.083 | 16.278 | 70.198 | 0.016 | 0.028 | 99.350 | 811.8 | 银金矿 | 115 | 裂隙金 |
序号 | 样号 | wB/% | 矿物 | 分子式 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Se | As | Ge | S | Pb | Bi | Sb | Fe | Cu | Zn | Te | Ag | Au | Ni | Co | Total | ||||
1 | 18502-141 | 0.011 | 0.265 | 0.158 | 2.056 | 36.703 | 60.817 | 0.058 | 0.002 | 100.070 | 碲银矿 | Ag1.99Fe0.16Te1 | |||||||
2 | 18003-3g111 | 0.013 | 0.267 | 0.036 | 2.129 | 0.006 | 0.058 | 40.674 | 52.301 | 3.744 | 99.228 | Ag1.96Fe0.13Te1 | |||||||
3 | 18003-3g143 | 0.068 | 0.814 | 2.276 | 36.948 | 58.694 | 0.415 | 0.003 | 0.003 | 99.221 | Ag1.52Fe0.12Te1 | ||||||||
4 | 18003-3g144 | 0.016 | 0.169 | 1.327 | 39.605 | 59.580 | 0.169 | 0.003 | 0.013 | 100.882 | Ag1.88Fe0.14Te1 | ||||||||
5 | 18003-3g145 | 0.027 | 0.226 | 0.030 | 0.134 | 1.810 | 0.011 | 0.019 | 38.426 | 59.617 | 0.089 | 100.389 | Ag1.78Fe0.08Te1 | ||||||
6 | 17508-1g121 | 0.046 | 0.062 | 1.406 | 0.012 | 36.828 | 60.978 | 0.061 | 0.034 | 99.427 | Ag1.83Fe0.11Te1 | ||||||||
7 | 17508-1g157 | 0.073 | 0.156 | 0.103 | 1.525 | 37.121 | 60.216 | 0.208 | 0.039 | 0.034 | 99.475 | Ag1.96Fe0.09Te1 | |||||||
8 | 17508-1g112 | 0.067 | 0.166 | 2.840 | 1.840 | 0.025 | 35.566 | 58.419 | 0.175 | 0.003 | 99.101 | Ag1.92Fe0.09Te1 | |||||||
9 | 17508-1g114 | 0.084 | 0.102 | 1.165 | 37.173 | 59.942 | 0.013 | 98.479 | Ag1.94Fe0.12Te1 | ||||||||||
10 | 17508-1g116 | 0.139 | 0.025 | 0.033 | 0.194 | 0.178 | 0.030 | 37.658 | 61.090 | 0.118 | 0.030 | 99.495 | Ag1.91Fe0.07Te1 | ||||||
11 | 18017-2153 | 0.149 | 0.039 | 0.140 | 1.236 | 0.006 | 37.253 | 60.561 | 0.302 | 0.004 | 99.690 | Ag1.92Fe0.01Te1 | |||||||
12 | 14005-2g144 | 0.042 | 0.012 | 0.168 | 38.197 | 60.624 | 0.029 | 99.072 | Ag1.92Fe0.07Te1 | ||||||||||
13 | 18010-1g115 | 0.083 | 0.037 | 0.094 | 1.325 | 1.594 | 0.020 | 39.500 | 57.868 | 0.248 | 0.036 | 100.805 | Ag1.88Fe0.01Te1 | ||||||
14 | 18011-1g112 | 0.050 | 0.042 | 0.011 | 0.145 | 0.001 | 38.256 | 60.597 | 0.096 | 0.011 | 99.209 | Ag1.73Fe0.09Te1 | |||||||
15 | 17508-1g115 | 0.080 | 0.100 | 0.001 | 52.241 | 0.288 | 0.011 | 0.004 | 35.821 | 11.833 | 0.048 | 100.427 | 碲铅矿 | Pb0.89Ag0.39Te1 | |||||
16 | 17508-1g131 | 0.118 | 0.107 | 0.056 | 59.041 | 2.385 | 0.003 | 0.086 | 35.831 | 1.369 | 0.024 | 99.020 | Pb1.01Ag0.04Te1 | ||||||
17 | 18017-223 | 0.193 | 0.123 | 0.063 | 59.298 | 2.014 | 0.018 | 0.006 | 37.142 | 0.987 | 99.844 | Pb0.98Ag0.03Te1 | |||||||
18 | 18010-1g114 | 0.041 | 0.132 | 0.656 | 56.744 | 2.847 | 37.286 | 2.234 | 0.011 | 99.951 | Pb0.94Ag0.07Te1 | ||||||||
19 | 18017-262 | 0.097 | 0.056 | 0.151 | 1.457 | 0.030 | 33.524 | 40.016 | 24.839 | 100.170 | 碲金银矿 | Ag2.8Au0.96Fe0.2Te2 | |||||||
20 | 18017-222 | 0.004 | 0.153 | 0.061 | 2.046 | 0.026 | 36.276 | 42.751 | 18.727 | 0.009 | 0.001 | 100.054 | Ag2.8Au0.66Fe0.26Te2 | ||||||
21 | 14005-2g143 | 0.063 | 0.035 | 0.308 | 0.393 | 0.026 | 34.692 | 43.093 | 20.505 | 0.033 | 0.006 | 99.154 | Ag2.94Au0.76Fe0.06Te2 | ||||||
22 | 14005-2g112 | 0.014 | 0.041 | 0.056 | 0.164 | 1.277 | 0.049 | 34.904 | 42.985 | 20.137 | 0.015 | 99.642 | Ag2.92Au0.74Fe0.16Te2 | ||||||
23 | 14005-2g111 | 0.092 | 0.013 | 4.233 | 59.549 | 0.267 | 0.430 | 35.071 | 0.025 | 0.008 | 99.688 | 辉碲铋矿 | Bi2.08Fe0.34Te2S0.96 | ||||||
24 | 17006-1g158 | 0.152 | 4.224 | 60.417 | 1.106 | 0.011 | 33.471 | 0.103 | 0.002 | 99.486 | Bi2.2Fe0.14Te2S1 | ||||||||
25 | 17006-1g122 | 0.145 | 4.179 | 59.731 | 2.262 | 0.036 | 33.044 | 0.114 | 0.020 | 99.531 | Bi2.2Fe0.32Te2S1 | ||||||||
26 | 14005-2g121 | 0.025 | 0.055 | 5.994 | 25.049 | 1.794 | 27.206 | 21.073 | 19.281 | 0.025 | 100.502 | 碲金银矿 +方铅矿 | Au0.92Ag1.84Te2+ Pb1.14Fe0.3S1.76 | ||||||
27 | 17006-1g155 | 0.333 | 0.176 | 1.115 | 19.622 | 35.346 | 42.623 | 0.027 | 99.242 | 碲金银矿 +银金矿 | Ag3Au0.73Fe0.27Te2+ Ag1.2Au2.07 | ||||||||
28 | 17006-1g154 | 11.321 | 10.289 | 0.032 | 26.655 | 43.883 | 7.412 | 0.003 | 0.003 | 99.598 | 碲银矿 +黄铁矿 | Ag1.95Au0.18Te1+ Fe0.88S1.69 | |||||||
29 | 17508-1g155 | 0.223 | 11.124 | 70.277 | 2.120 | 8.254 | 7.486 | 0.436 | 99.920 | 碲银矿 +方铅矿 | Ag1.07Fe0.59Te1+ Pb5.24S5.36 |
表2 永新金矿床碲化物电子探针分析结果
Table 2 Results of electron microprobe analysis of telluride in the Yongxin gold deposit
序号 | 样号 | wB/% | 矿物 | 分子式 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Se | As | Ge | S | Pb | Bi | Sb | Fe | Cu | Zn | Te | Ag | Au | Ni | Co | Total | ||||
1 | 18502-141 | 0.011 | 0.265 | 0.158 | 2.056 | 36.703 | 60.817 | 0.058 | 0.002 | 100.070 | 碲银矿 | Ag1.99Fe0.16Te1 | |||||||
2 | 18003-3g111 | 0.013 | 0.267 | 0.036 | 2.129 | 0.006 | 0.058 | 40.674 | 52.301 | 3.744 | 99.228 | Ag1.96Fe0.13Te1 | |||||||
3 | 18003-3g143 | 0.068 | 0.814 | 2.276 | 36.948 | 58.694 | 0.415 | 0.003 | 0.003 | 99.221 | Ag1.52Fe0.12Te1 | ||||||||
4 | 18003-3g144 | 0.016 | 0.169 | 1.327 | 39.605 | 59.580 | 0.169 | 0.003 | 0.013 | 100.882 | Ag1.88Fe0.14Te1 | ||||||||
5 | 18003-3g145 | 0.027 | 0.226 | 0.030 | 0.134 | 1.810 | 0.011 | 0.019 | 38.426 | 59.617 | 0.089 | 100.389 | Ag1.78Fe0.08Te1 | ||||||
6 | 17508-1g121 | 0.046 | 0.062 | 1.406 | 0.012 | 36.828 | 60.978 | 0.061 | 0.034 | 99.427 | Ag1.83Fe0.11Te1 | ||||||||
7 | 17508-1g157 | 0.073 | 0.156 | 0.103 | 1.525 | 37.121 | 60.216 | 0.208 | 0.039 | 0.034 | 99.475 | Ag1.96Fe0.09Te1 | |||||||
8 | 17508-1g112 | 0.067 | 0.166 | 2.840 | 1.840 | 0.025 | 35.566 | 58.419 | 0.175 | 0.003 | 99.101 | Ag1.92Fe0.09Te1 | |||||||
9 | 17508-1g114 | 0.084 | 0.102 | 1.165 | 37.173 | 59.942 | 0.013 | 98.479 | Ag1.94Fe0.12Te1 | ||||||||||
10 | 17508-1g116 | 0.139 | 0.025 | 0.033 | 0.194 | 0.178 | 0.030 | 37.658 | 61.090 | 0.118 | 0.030 | 99.495 | Ag1.91Fe0.07Te1 | ||||||
11 | 18017-2153 | 0.149 | 0.039 | 0.140 | 1.236 | 0.006 | 37.253 | 60.561 | 0.302 | 0.004 | 99.690 | Ag1.92Fe0.01Te1 | |||||||
12 | 14005-2g144 | 0.042 | 0.012 | 0.168 | 38.197 | 60.624 | 0.029 | 99.072 | Ag1.92Fe0.07Te1 | ||||||||||
13 | 18010-1g115 | 0.083 | 0.037 | 0.094 | 1.325 | 1.594 | 0.020 | 39.500 | 57.868 | 0.248 | 0.036 | 100.805 | Ag1.88Fe0.01Te1 | ||||||
14 | 18011-1g112 | 0.050 | 0.042 | 0.011 | 0.145 | 0.001 | 38.256 | 60.597 | 0.096 | 0.011 | 99.209 | Ag1.73Fe0.09Te1 | |||||||
15 | 17508-1g115 | 0.080 | 0.100 | 0.001 | 52.241 | 0.288 | 0.011 | 0.004 | 35.821 | 11.833 | 0.048 | 100.427 | 碲铅矿 | Pb0.89Ag0.39Te1 | |||||
16 | 17508-1g131 | 0.118 | 0.107 | 0.056 | 59.041 | 2.385 | 0.003 | 0.086 | 35.831 | 1.369 | 0.024 | 99.020 | Pb1.01Ag0.04Te1 | ||||||
17 | 18017-223 | 0.193 | 0.123 | 0.063 | 59.298 | 2.014 | 0.018 | 0.006 | 37.142 | 0.987 | 99.844 | Pb0.98Ag0.03Te1 | |||||||
18 | 18010-1g114 | 0.041 | 0.132 | 0.656 | 56.744 | 2.847 | 37.286 | 2.234 | 0.011 | 99.951 | Pb0.94Ag0.07Te1 | ||||||||
19 | 18017-262 | 0.097 | 0.056 | 0.151 | 1.457 | 0.030 | 33.524 | 40.016 | 24.839 | 100.170 | 碲金银矿 | Ag2.8Au0.96Fe0.2Te2 | |||||||
20 | 18017-222 | 0.004 | 0.153 | 0.061 | 2.046 | 0.026 | 36.276 | 42.751 | 18.727 | 0.009 | 0.001 | 100.054 | Ag2.8Au0.66Fe0.26Te2 | ||||||
21 | 14005-2g143 | 0.063 | 0.035 | 0.308 | 0.393 | 0.026 | 34.692 | 43.093 | 20.505 | 0.033 | 0.006 | 99.154 | Ag2.94Au0.76Fe0.06Te2 | ||||||
22 | 14005-2g112 | 0.014 | 0.041 | 0.056 | 0.164 | 1.277 | 0.049 | 34.904 | 42.985 | 20.137 | 0.015 | 99.642 | Ag2.92Au0.74Fe0.16Te2 | ||||||
23 | 14005-2g111 | 0.092 | 0.013 | 4.233 | 59.549 | 0.267 | 0.430 | 35.071 | 0.025 | 0.008 | 99.688 | 辉碲铋矿 | Bi2.08Fe0.34Te2S0.96 | ||||||
24 | 17006-1g158 | 0.152 | 4.224 | 60.417 | 1.106 | 0.011 | 33.471 | 0.103 | 0.002 | 99.486 | Bi2.2Fe0.14Te2S1 | ||||||||
25 | 17006-1g122 | 0.145 | 4.179 | 59.731 | 2.262 | 0.036 | 33.044 | 0.114 | 0.020 | 99.531 | Bi2.2Fe0.32Te2S1 | ||||||||
26 | 14005-2g121 | 0.025 | 0.055 | 5.994 | 25.049 | 1.794 | 27.206 | 21.073 | 19.281 | 0.025 | 100.502 | 碲金银矿 +方铅矿 | Au0.92Ag1.84Te2+ Pb1.14Fe0.3S1.76 | ||||||
27 | 17006-1g155 | 0.333 | 0.176 | 1.115 | 19.622 | 35.346 | 42.623 | 0.027 | 99.242 | 碲金银矿 +银金矿 | Ag3Au0.73Fe0.27Te2+ Ag1.2Au2.07 | ||||||||
28 | 17006-1g154 | 11.321 | 10.289 | 0.032 | 26.655 | 43.883 | 7.412 | 0.003 | 0.003 | 99.598 | 碲银矿 +黄铁矿 | Ag1.95Au0.18Te1+ Fe0.88S1.69 | |||||||
29 | 17508-1g155 | 0.223 | 11.124 | 70.277 | 2.120 | 8.254 | 7.486 | 0.436 | 99.920 | 碲银矿 +方铅矿 | Ag1.07Fe0.59Te1+ Pb5.24S5.36 |
图4 永新金矿床碲化物赋存状态及共生矿物组合显微照片 a—近椭圆状辉碲铋矿包裹于黄铁矿内;b—不规则条状的碲银矿充填在黄铁矿裂隙中;c—碲银矿、自然金和方铅矿呈连生体充填于黄铁矿裂隙中;d—碲银矿、自然金与方铅矿的连生体包裹于黄铁矿中;e—碲银矿与自然金的连生体及独立碲银矿包裹于黄铁矿中;f—碲银矿、自然金和方铅矿的连生体产于黄铁矿裂隙中;g—碲金银矿、自然金和方铅矿三者呈连生体产于黄铁矿裂隙中;h—碲金银矿与自然金的连生体产于黄铁矿裂隙中;i—碲铅矿和碲银矿连生体产于晚期黄铁矿中。Py—黄铁矿;Au—自然金;Ttd—辉碲铋矿;Pz—碲金银矿;Hes—碲银矿;Alt—碲铅矿;Gn—方铅矿;Qtz—石英。
Fig.4 Typical photomicrograph showing telluride occurrence and mineral assemblage in the Yongxin gold deposit
图5 永新金矿床碲化物赋存状态背散射图像 a—辉碲铋矿产于黄铁矿内部;b—碲银矿与方铅矿连生体及自然金与方铅矿的连生体产于黄铁矿内;c—碲铅矿充填于黄铁矿裂隙中;d—碲金银矿与自然金连生并存在于黄铁矿颗粒间;e—碲银矿、自然金和碲铅矿等产于黄铁矿边部;f—辉碲铋矿包裹于黄铁矿中,碲金银矿充填在黄铁矿裂隙中,碲银矿包裹于石英中;g—碲银矿与碲铅矿连生并包裹于黄铁矿中;h—碲银矿与自然金连生产于黄铁矿内;i—自然金、碲银矿、碲铅矿、碲银矿与碲铅矿的连生体等存在于石英中。Py—黄铁矿;Au—自然金;Ttd—辉碲铋矿;Pz—碲金银矿;Hes—碲银矿;Alt—碲铅矿;Gn—方铅矿。
Fig.5 Backscattered electron image of telluride showing its mode of occurrence in the Yongxin gold deposit
图6 200 ℃条件下不同金属元素的碲化物-硫化物的f(Te2)-f(S2)图解(底图据文献[16])
Fig.6 f(Te2) vs. f(S2) diagram calculated at 200 ℃ for tellurides and sulfides. Adapted from [16].
图8 永新金矿床Au(a)、Te(b)元素构造叠加晕水平投影等值线图
Fig.8 Horizontal projection contour map showing different levels of Au (a) and Te (b) anomalies in the structural superimposed halos within the Yongxin gold deposit
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