In-situ U-Pb Geochronology and Sr Isotope Composition of the Scheelite from the Huangtian Tungsten Deposit, Southeast Yunnan, and Its Metallogenic Revelation

doi:10.19657/j.geoscience.1000-8527.2024.068

Abstract

Abstract:

The Huangtian tungsten deposit is a recently discovered large-scale scheelite deposit on the northern edge of the Laojunshan polymetallic mineralization area, in Southeast Yunnan province. Previous research has investigated the geological characteristics of the deposit and the evolution of mineralization fluids. However, the absence of a precise determination of its mineralization age and the contentious origin of its mineralization and materials have impeded the academic community’s comprehensive comprehension of its mineralization mechanism. To determine this problem, this article conducted in-situ U-Pb dating and in-situ Sr isotope composition on main mineralization stage I scheelite based on detailed drilling core catalogs and mineral microstructure analyses. The results show that the scheelite formed (64.6±3.7) Ma (n=35,MSWD=1.6), reflecting that the mineralization occurred in the early Paleocene. When considered in conjunction with the geological background of the mine area, it is hypothesized that the mineralization is closely related to the deep, concealed granite body in the southern part of the mine section. The ⁸⁷Sr/⁸⁶Sr values (0.720,25-0.728,40) of the Huangtian scheelite are significantly higher than those of the continental lithospheric mantle, indicating a crustal source. The initial Sr isotope ratios of the huangtian scheelite and the laojunshan granite are consistent, suggesting that they may have originated from a common hydrothermal system(long-lived magma chamber). The elevated concentration of Ca in Huangtian scheelite is primarily due to the sericitization of plagioclase in the granodiorite. The W element in Huangtian scheelite originates from the granodiorite by orthomagmatic model. This study defines the metallogenic era of tungsten deposits in Huangtian and traces the source of their mineralized materials. These findings lay a foundation for a deeper understanding of the metallogenic mechanisms and enrich our knowledge of the polymetallic metallogenic belt in Southeast Yunnan. Ultimately, this provides a theoretical basis for further prospecting in the region.

Key words: Southeast Yunnan, scheelite, in-situ U-Pb dating, in-situ Sr isotope, metallogenic significance

CLC Number:

P597
P618.67

WANG Zhongliang, LIN Musen, ZHOU Ruihui. In-situ U-Pb Geochronology and Sr Isotope Composition of the Scheelite from the Huangtian Tungsten Deposit, Southeast Yunnan, and Its Metallogenic Revelation[J]. Geoscience, 2025, 39(01): 133-145.

Figures/Tables 12

References 65

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序号	样品号	U(10^-6)	²⁰⁷Pb/²⁰⁶Pb(1σ)	²⁰⁷Pb/²³⁵U(1σ)	²⁰⁶Pb/²³⁸U(1σ)	²⁰⁶Pb/²³⁸U年龄(1σ)	f ²⁰⁶Pb
1	22HT01-01	2.59	0.512(0.024)	1.296(0.052)	0.01965(0.00056)	52.2(4.1)	0.5866
2	22HT01-02	2.54	0.641(0.020)	2.477(0.062)	0.02930(0.00065)	47.1(4.9)	0.7500
3	22HT01-03	2.79	0.552(0.025)	1.618(0.054)	0.02271(0.00058)	52.8(4.8)	0.6378
4	22HT01-04	3.37	0.513(0.022)	1.550(0.051)	0.02283(0.00044)	60.3(4.2)	0.5883
5	22HT01-05	2.73	0.432(0.021)	1.085(0.048)	0.01936(0.00054)	64.0(3.7)	0.4848
6	22HT01-06	2.21	0.627(0.024)	2.614(0.074)	0.03197(0.00072)	54.9(6.3)	0.7321
7	22HT01-07	2.73	0.604(0.023)	2.141(0.058)	0.02705(0.00058)	51.4(5.2)	0.7037
8	22HT01-08	2.11	0.692(0.022)	3.778(0.085)	0.04113(0.00077)	49.0(7.4)	0.8147
9	22HT01-09	2.80	0.533(0.025)	1.408(0.048)	0.02098(0.00053)	52.1(4.4)	0.6131
10	22HT01-10	1.93	0.724(0.018)	5.630(0.110)	0.05837(0.00110)	54.6(8.6)	0.8541
11	22HT01-11	1.40	0.824(0.024)	8.972(0.210)	0.08149(0.00150)	8.0(16.0)	0.9843
12	22HT01-12	1.10	0.684(0.041)	2.672(0.110)	0.03243(0.00110)	40.5(10.9)	0.8055
13	22HT01-13	1.21	0.750(0.031)	4.523(0.130)	0.04701(0.00120)	33.7(11.9)	0.8886
14	22HT01-14	2.29	0.693(0.026)	2.851(0.075)	0.03178(0.00080)	37.4(6.8)	0.8166
15	22HT01-15	3.35	0.482(0.020)	1.317(0.044)	0.02120(0.00052)	61.4(3.7)	0.5487
16	22HT01-16	3.05	0.526(0.024)	1.594(0.053)	0.02355(0.00056)	59.8(4.8)	0.6046
17	22HT01-17	2.15	0.590(0.028)	1.676(0.064)	0.02248(0.00072)	45.5(5.3)	0.6854
18	22HT01-18	2.02	0.583(0.027)	2.001(0.072)	0.02709(0.00077)	56.3(6.1)	0.6758
19	22HT01-19	3.04	0.588(0.025)	1.960(0.056)	0.02593(0.00062)	52.6(5.4)	0.6842
20	22HT01-20	2.63	0.694(0.020)	3.919(0.087)	0.04297(0.00110)	50.5(7.1)	0.8170
21	22HT01-21	2.82	0.628(0.019)	2.726(0.062)	0.03296(0.00074)	56.5(5.2)	0.7325
22	22HT01-22	1.70	0.795(0.024)	7.791(0.16)	0.07494(0.00190)	26.3(14.6)	0.9460
23	22HT01-23	2.06	0.660(0.027)	2.673(0.087)	0.03138(0.00084)	45.5(7.0)	0.7748
24	22HT01-24	3.01	0.548(0.024)	1.851(0.059)	0.02612(0.00068)	61.8(5.3)	0.6317
25	22HT01-25	2.83	0.610(0.038)	1.770(0.060)	0.02389(0.00071)	44.4(7.5)	0.7113
26	22HT01-26	1.94	0.560(0.039)	1.605(0.083)	0.02357(0.00075)	53.3(7.6)	0.6474
27	22HT01-27	3.50	0.502(0.022)	1.331(0.042)	0.02070(0.00058)	56.5(4.0)	0.5744
28	22HT01-28	2.12	0.627(0.028)	2.431(0.083)	0.03041(0.00085)	52.4(7.0)	0.7317
29	22HT01-29	1.41	0.734(0.036)	4.150(0.160)	0.04415(0.00130)	37.2(12.9)	0.8688
30	22HT01-30	2.79	0.530(0.033)	1.408(0.056)	0.02172(0.00065)	54.5(6.0)	0.6091
31	22HT01-31	2.86	0.544(0.026)	1.590(0.059)	0.02309(0.00061)	55.2(5.1)	0.6273
32	22HT01-32	2.66	0.549(0.029)	1.687(0.065)	0.02462(0.00078)	57.9(6.1)	0.6330
33	22HT01-33	3.13	0.421(0.024)	0.886(0.041)	0.01667(0.00047)	56.5(3.6)	0.4719
34	22HT01-34	4.51	0.115(0.012)	0.149(0.015)	0.01141(0.00036)	66.9(2.4)	0.0853
35	22HT01-35	3.09	0.484(0.019)	1.636(0.057)	0.02560(0.00062)	73.7(4.3)	0.5508

序号	样品号	U(10^-6)	²⁰⁷Pb/²⁰⁶Pb(1σ)	²⁰⁷Pb/²³⁵U(1σ)	²⁰⁶Pb/²³⁸U(1σ)	²⁰⁶Pb/²³⁸U年龄(1σ)	f ²⁰⁶Pb
1	22HT01-01	2.59	0.512(0.024)	1.296(0.052)	0.01965(0.00056)	52.2(4.1)	0.5866
2	22HT01-02	2.54	0.641(0.020)	2.477(0.062)	0.02930(0.00065)	47.1(4.9)	0.7500
3	22HT01-03	2.79	0.552(0.025)	1.618(0.054)	0.02271(0.00058)	52.8(4.8)	0.6378
4	22HT01-04	3.37	0.513(0.022)	1.550(0.051)	0.02283(0.00044)	60.3(4.2)	0.5883
5	22HT01-05	2.73	0.432(0.021)	1.085(0.048)	0.01936(0.00054)	64.0(3.7)	0.4848
6	22HT01-06	2.21	0.627(0.024)	2.614(0.074)	0.03197(0.00072)	54.9(6.3)	0.7321
7	22HT01-07	2.73	0.604(0.023)	2.141(0.058)	0.02705(0.00058)	51.4(5.2)	0.7037
8	22HT01-08	2.11	0.692(0.022)	3.778(0.085)	0.04113(0.00077)	49.0(7.4)	0.8147
9	22HT01-09	2.80	0.533(0.025)	1.408(0.048)	0.02098(0.00053)	52.1(4.4)	0.6131
10	22HT01-10	1.93	0.724(0.018)	5.630(0.110)	0.05837(0.00110)	54.6(8.6)	0.8541
11	22HT01-11	1.40	0.824(0.024)	8.972(0.210)	0.08149(0.00150)	8.0(16.0)	0.9843
12	22HT01-12	1.10	0.684(0.041)	2.672(0.110)	0.03243(0.00110)	40.5(10.9)	0.8055
13	22HT01-13	1.21	0.750(0.031)	4.523(0.130)	0.04701(0.00120)	33.7(11.9)	0.8886
14	22HT01-14	2.29	0.693(0.026)	2.851(0.075)	0.03178(0.00080)	37.4(6.8)	0.8166
15	22HT01-15	3.35	0.482(0.020)	1.317(0.044)	0.02120(0.00052)	61.4(3.7)	0.5487
16	22HT01-16	3.05	0.526(0.024)	1.594(0.053)	0.02355(0.00056)	59.8(4.8)	0.6046
17	22HT01-17	2.15	0.590(0.028)	1.676(0.064)	0.02248(0.00072)	45.5(5.3)	0.6854
18	22HT01-18	2.02	0.583(0.027)	2.001(0.072)	0.02709(0.00077)	56.3(6.1)	0.6758
19	22HT01-19	3.04	0.588(0.025)	1.960(0.056)	0.02593(0.00062)	52.6(5.4)	0.6842
20	22HT01-20	2.63	0.694(0.020)	3.919(0.087)	0.04297(0.00110)	50.5(7.1)	0.8170
21	22HT01-21	2.82	0.628(0.019)	2.726(0.062)	0.03296(0.00074)	56.5(5.2)	0.7325
22	22HT01-22	1.70	0.795(0.024)	7.791(0.16)	0.07494(0.00190)	26.3(14.6)	0.9460
23	22HT01-23	2.06	0.660(0.027)	2.673(0.087)	0.03138(0.00084)	45.5(7.0)	0.7748
24	22HT01-24	3.01	0.548(0.024)	1.851(0.059)	0.02612(0.00068)	61.8(5.3)	0.6317
25	22HT01-25	2.83	0.610(0.038)	1.770(0.060)	0.02389(0.00071)	44.4(7.5)	0.7113
26	22HT01-26	1.94	0.560(0.039)	1.605(0.083)	0.02357(0.00075)	53.3(7.6)	0.6474
27	22HT01-27	3.50	0.502(0.022)	1.331(0.042)	0.02070(0.00058)	56.5(4.0)	0.5744
28	22HT01-28	2.12	0.627(0.028)	2.431(0.083)	0.03041(0.00085)	52.4(7.0)	0.7317
29	22HT01-29	1.41	0.734(0.036)	4.150(0.160)	0.04415(0.00130)	37.2(12.9)	0.8688
30	22HT01-30	2.79	0.530(0.033)	1.408(0.056)	0.02172(0.00065)	54.5(6.0)	0.6091
31	22HT01-31	2.86	0.544(0.026)	1.590(0.059)	0.02309(0.00061)	55.2(5.1)	0.6273
32	22HT01-32	2.66	0.549(0.029)	1.687(0.065)	0.02462(0.00078)	57.9(6.1)	0.6330
33	22HT01-33	3.13	0.421(0.024)	0.886(0.041)	0.01667(0.00047)	56.5(3.6)	0.4719
34	22HT01-34	4.51	0.115(0.012)	0.149(0.015)	0.01141(0.00036)	66.9(2.4)	0.0853
35	22HT01-35	3.09	0.484(0.019)	1.636(0.057)	0.02560(0.00062)	73.7(4.3)	0.5508

序号	样品	⁸⁵Rb(v)	⁸⁸Sr(v)	⁸⁴Sr/⁸⁶Sr(2σ)	⁸⁷Rb/⁸⁶Sr(2σ)	⁸⁷Sr/⁸⁶Sr(2σ)	(⁸⁷Sr/⁸⁶Sr)_i
1	22HT01-1-01	0.000043	0.912870	0.05684(0.00186)	0.000158(0.000071)	0.72472(0.00018)	0.72472
2	22HT01-1-02	0.000043	0.591750	0.05724(0.00270)	0.000228(0.000151)	0.72354(0.00026)	0.72354
3	22HT01-1-03	0.000060	0.695067	0.05594(0.00245)	0.000280(0.000106)	0.72328(0.00025)	0.72328
4	22HT01-2-01	0.000037	0.877332	0.05582(0.00185)	0.000138(0.000093)	0.72688(0.00023)	0.72688
5	22HT01-2-02	0.000038	0.890591	0.05702(0.00191)	0.000137(0.000079)	0.72343(0.00018)	0.72343
6	22HT01-2-03	0.000071	0.687341	0.05639(0.00204)	0.000338(0.000123)	0.72277(0.00023)	0.72277
7	22HT04-1-01	0.000058	0.402537	0.05624(0.00384)	0.000479(0.000142)	0.72429(0.00038)	0.72429
8	22HT04-1-02	0.000004	0.251385	0.05733(0.00672)	0.000122(0.000310)	0.72616(0.00053)	0.72616
9	22HT04-1-03	0.000021	0.374930	0.05633(0.00407)	0.000184(0.000223)	0.72815(0.00045)	0.72815
10	22HT07-01	0.000067	0.886601	0.05416(0.00178)	0.000256(0.000097)	0.72025(0.00019)	0.72025
11	22HT07-02	0.000133	0.919538	0.05612(0.00170)	0.000475(0.000074)	0.72060(0.00017)	0.72060
12	22HT12-1-01	0.000076	1.173541	0.05682(0.00129)	0.000212(0.000067)	0.72449(0.00014)	0.72449
13	22HT12-1-02	0.000076	1.066293	0.05608(0.00141)	0.000235(0.000089)	0.72468(0.00018)	0.72468
14	22HT12-1-03	0.000118	0.447647	0.05674(0.00349)	0.000838(0.000186)	0.72275(0.00034)	0.72275
15	22HT12-1-04	0.000057	0.594362	0.05619(0.00256)	0.000312(0.000122)	0.72840(0.00032)	0.72840
16	22HT12-2-01	0.000048	0.792939	0.05686(0.00203)	0.000204(0.000095)	0.72433(0.00022)	0.72433
17	22HT12-2-02	0.000072	0.386895	0.05644(0.00370)	0.000611(0.000209)	0.72360(0.00043)	0.72360

序号	样品	⁸⁵Rb(v)	⁸⁸Sr(v)	⁸⁴Sr/⁸⁶Sr(2σ)	⁸⁷Rb/⁸⁶Sr(2σ)	⁸⁷Sr/⁸⁶Sr(2σ)	(⁸⁷Sr/⁸⁶Sr)_i
1	22HT01-1-01	0.000043	0.912870	0.05684(0.00186)	0.000158(0.000071)	0.72472(0.00018)	0.72472
2	22HT01-1-02	0.000043	0.591750	0.05724(0.00270)	0.000228(0.000151)	0.72354(0.00026)	0.72354
3	22HT01-1-03	0.000060	0.695067	0.05594(0.00245)	0.000280(0.000106)	0.72328(0.00025)	0.72328
4	22HT01-2-01	0.000037	0.877332	0.05582(0.00185)	0.000138(0.000093)	0.72688(0.00023)	0.72688
5	22HT01-2-02	0.000038	0.890591	0.05702(0.00191)	0.000137(0.000079)	0.72343(0.00018)	0.72343
6	22HT01-2-03	0.000071	0.687341	0.05639(0.00204)	0.000338(0.000123)	0.72277(0.00023)	0.72277
7	22HT04-1-01	0.000058	0.402537	0.05624(0.00384)	0.000479(0.000142)	0.72429(0.00038)	0.72429
8	22HT04-1-02	0.000004	0.251385	0.05733(0.00672)	0.000122(0.000310)	0.72616(0.00053)	0.72616
9	22HT04-1-03	0.000021	0.374930	0.05633(0.00407)	0.000184(0.000223)	0.72815(0.00045)	0.72815
10	22HT07-01	0.000067	0.886601	0.05416(0.00178)	0.000256(0.000097)	0.72025(0.00019)	0.72025
11	22HT07-02	0.000133	0.919538	0.05612(0.00170)	0.000475(0.000074)	0.72060(0.00017)	0.72060
12	22HT12-1-01	0.000076	1.173541	0.05682(0.00129)	0.000212(0.000067)	0.72449(0.00014)	0.72449
13	22HT12-1-02	0.000076	1.066293	0.05608(0.00141)	0.000235(0.000089)	0.72468(0.00018)	0.72468
14	22HT12-1-03	0.000118	0.447647	0.05674(0.00349)	0.000838(0.000186)	0.72275(0.00034)	0.72275
15	22HT12-1-04	0.000057	0.594362	0.05619(0.00256)	0.000312(0.000122)	0.72840(0.00032)	0.72840
16	22HT12-2-01	0.000048	0.792939	0.05686(0.00203)	0.000204(0.000095)	0.72433(0.00022)	0.72433
17	22HT12-2-02	0.000072	0.386895	0.05644(0.00370)	0.000611(0.000209)	0.72360(0.00043)	0.72360

年龄类型	序号	采样位置	岩石(矿物)类型	测试方法	年龄(Ma)	数据来源
成岩年龄	1	老君山	花岗岩	LA-ICP-MS锆石U-Pb	96.0±2.0	张斌辉等^[27]
	2		花岗岩	LA-ICP-MS锆石U-Pb	91.4±2.5	刘艳宾等^[28]
	3		花岗岩	LA-ICP-MS锆石U-Pb	88.4±4.3	李进文等^[29]
	4		花岗岩	LA-ICP-MS锆石U-Pb	88.0±4.0	Xu et al^[30]
	5		花岗岩	LA-ICP-MS锆石U-Pb	86.9±1.4	刘玉平等^[31]
	6		花岗岩	LA-ICP-MS锆石U-Pb	86.3±0.3	Feng et al^[32]
	7		花岗岩	LA-ICP-MS锆石U-Pb	88.0±5.0	赵震宇等^[33]
	8	个旧	花岗岩	LA-ICP-MS锆石U-Pb	81.2±3.8	程彦博等^[34]
	9		花岗岩	LA-ICP-MS锆石U-Pb	89.8±0.4	李宝龙等^[35]
	10		花岗岩	LA-ICP-MS锆石U-Pb	81.5±0.4	黄文龙等^[36]
	11	薄竹山	花岗岩	LA-ICP-MS锆石U-Pb	87.3±0.7	黄建国等^[37]
	12		花岗岩	LA-ICP-MS锆石U-Pb	89.3±2.0	李建德等^[38]
	13		花岗岩	LA-ICP-MS锆石U-Pb	91.6±1.0	Zhang et al^[39]
成矿年龄	1	老君山	白钨矿	LA-ICP-MS白钨矿U-Pb	64.6±3.7	本文
	2		闪锌矿	Rb-Sr等时线法	79.1±9.1	刘玉平等^[40]
	3		锡石	LA-ICP-MS锡石U-Pb	82.0±2.5	王小娟等^[41]
	4		辉钼矿	Re-Os等时线法	77.1±2.1	李进文等^[29]
	5		白钨矿	Sm-Nd等时线法	97.0±9.0	杜胜江等^[42]
	6		萤石	Sm-Nd等时线法	78.8±3.2	杜胜江等^[42]
	7		闪锌矿	Rb-Sr等时线法	85.2±0.7	刘明军等^[3]
	8		锡石	LA-ICP-MS锡石U-Pb	84.3±4.7	刘明军等^[3]
	9		白云母	⁴⁰Ar-³⁹Ar定年	85.3±1.6	刘玉平等^[31]
	10	个旧	白钨矿	Sm-Nd等时线法	83.2±4.2	彭强^[43]
	11		辉钼矿	Re-Os等时线法	83.4±2.1	杨宗喜等^[44]
	12		白云母	⁴⁰Ar-³⁹Ar定年	76.1±0.6	李宝龙等^[45]
	13		白云母	⁴⁰Ar-³⁹Ar定年	79.7±1.0	张娟等^[46]
	14		金云母	⁴⁰Ar-³⁹Ar定年	85.6±0.4	张娟等^[47]
	15	薄竹山	白钨矿	LA-ICP-MS石榴子石U-Pb	87.6±2.3	刘益等^[48]
	16		黑钨矿	LA-ICP-MS黑钨矿U-Pb	86.2±2.2	刘艳宾^[49]
	17		锡石	LA-ICP-MS锡石U-Pb	88.2±3.8	刘艳宾^[49]
	18		花岗岩	LA-ICP-MS锆石U-Pb	87.9±0.5	李开文等^[50]