湖北宜昌下白垩统五龙组风成砂的发现及其物源分析

王倩; 肖国桥; 高慧; 秦世玉; 黄咸雨

doi:10.19509/j.cnki.dzkq.2022.0091

湖北宜昌下白垩统五龙组风成砂的发现及其物源分析

doi: 10.19509/j.cnki.dzkq.2022.0091

王倩^a,,
肖国桥^{a, b, ,},
高慧^a,
秦世玉^b,
黄咸雨^{a, b}

a.
中国地质大学(武汉)地理与信息工程学院流域关键带演化湖北省重点实验室, 武汉 430078
b.
中国地质大学(武汉)生物地质与环境地质国家重点实验室, 武汉 430078

基金项目:

国家自然科学基金项目 41888101

国家自然科学基金项目 41672338

详细信息

作者简介:
王倩(1997-), 女, 主要从事磁性地层定年和三叠纪牙形石研究工作。E-mail: wangqlao0708@163.com

通讯作者:
肖国桥(1980-), 男, 副教授, 主要从事第四纪地质学与古全球变化研究工作。E-mail: xgqiaocug@gmail.com

中图分类号: P588.21⁺.2.3
计量
- 文章访问数: 641
- PDF下载量: 114
- 被引次数: 0
出版历程
- 收稿日期: 2021-11-10
- 录用日期: 2022-02-13
- 修回日期: 2022-01-28

Discovery of the Lower Cretaceous aeolian sandstones in the Wulong Formation in Yichang, Hubei Province, and its provenance

Wang Qian^a
,,
Xiao Guoqiao^{a, b
, ,},
Gao Hui^a,
Qin Shiyu^b,
Huang Xianyu^{a, b}

a.
Hubei Key Laboratory of Critical Zone Evolution, School of Geography and Information Engineering, China University of Geosciences(Wuhan), Wuhan 430078, China
b.
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences(Wuhan), Wuhan 430078, China

摘要

摘要:
白垩纪时期, 我国中纬度地区广泛发育风成砂岩, 指示了副热带沙漠带的存在。对白垩纪风成砂岩的发育年代、分布范围、物质来源、所记录的古风向等方面的研究, 有助于重建东亚地区白垩纪不同时期的古地理和古气候特征。为此, 对湖北宜昌地区下白垩统五龙组(K₁w)中发育的一套巨厚的白垩纪砂岩开展了系统的野外沉积特征调查、室内粒度分析、石英颗粒表面微观特征的扫描电镜观察, 以及碎屑锆石U-Pb年代学研究, 探讨了其成因和物源特征。结果表明: ①该套砂岩分布于江汉盆地西缘白垩纪洪积扇的扇缘部位, 出露厚度超过40 m, 发育大型高角度交错层理, 其粒度组成十分均一, 其野外特征和粒度组成符合风成沙的特征; ②扫描电镜观察显示, 石英颗粒普遍磨圆较好, 表面发育碟形和新月形撞击坑, 以及溶蚀作用和沉淀作用导致的微观特征, 与风成砂的特征一致; ③该套砂岩的碎屑锆石年龄存在4个主要的峰值, 分别约为2.46, 1.85 Ga, 780, 170 Ma, 这些年龄峰值与秦岭-大别造山带及黄陵隆起之上沉积盖层的碎屑锆石年龄组成一致, 指示其物源可能主要来自黄陵隆起形成后其上覆盖的南华系-侏罗系的侵蚀物, 同时可能也混入了部分秦岭-大别造山带的物质; ④该套砂岩中最年轻的锆石年龄为(119.9±2.8) Ma, 指示该段地层的年龄不早于早白垩世晚期, 与湖北省地质调查院将五龙组划归下白垩统一致。上述结果指示着该套砂岩为早白垩世时期干旱气候条件下发育于干旱盆地洪积扇边缘的沙漠沉积, 指示着湖北宜昌地区在早白垩世副热高压的影响下已出现了地带性沙漠。
- 白垩纪 /
- 风成砂 /
- 碎屑锆石 /
- 物源 /
- 行星风系 /
- 湖北宜昌
Abstract: Objective
Eolian sandstones were widely developed in the middle latitudes of China during the Cretaceous era, which indicated the existence of subtropical desert belts. Studies on the age, distribution, provenance, and paleowind directions of Cretaceous aeolian sandstones would be helpful for the reconstruction of paleogeography and paleoclimate in East Asia during different periods of the Cretaceous era.
Methods
Here, we report the origin and provenance of a >40 m-thick sandstone layer within the Lower Cretaceous Wulong Formation (K₁w) in Yichang, Hubei Province by systematically investigating its sedimentary facies in the field, particle size distribution, quartz grain surface textures, and detrital zircon U-Pb chronology.
Results
The results show that ① The Cretaceous sandstones were developed distal to an alluvial fan system that formed on the western margin of the Jianghan Basin. The thickness of the sandstones outcropped over 40 meters, with large scale high angle cross-bedding, and its grain size is extremely uniform. These sedimentary characteristics are in accordance with modern aeolian sandstones. ②Scanning election microscope images show that the quartz grains are generally well rounded, with disk-shaped and crescent-shaped impact scars and microfeatures caused by dissolution and precipitation on their surface, and these features are consistent with aeolian sands. ③ Four major age peaks were shown at~2.46 Ga, ~1.85 Ga, ~780 Ma and~170 Ma in the detrital zircon spectrum of the sandstones in the Wulong Formation. These peaks are consistent with the zircon ages of the Qinling-Dabie Orogen Belt and the sedimentary cover of the Huangling Dome, indicating that the sandstones may be mainly derived from the erosion of the Nanhua-Jurassic strata after the uplift of the Huangling Dome, as well as erosions from the Qinling-Dabie Orogen. ④ The youngest zircon grain in the sandstone was (119.9±2.8) Ma, indicating that the age of the Wulong Formation was not earlier than the late Early Cretaceous and was consistent with the conclusion from geological survey which considered the Lower Cretaceous Wulong Formation.
Conclusion
These results show that the sandstones were desert deposits that developed at the margin of diluvial fan of arid basin under the late Early Cretaceous arid climate, indicating that the Yichang area of Hubei Province was within the zonal deserts since the Early Cretaceous period under the influence of the subtropical high.
- Cretaceous area /
- eolian sandstones /
- detrital zircon /
- provenance /
- planetary wind system /
- Yichang, Hubei Province
注释:

(所有作者声明不存在利益冲突)

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图 1 湖北宜昌地区的大地构造单元(a)及区域地质简图(b)(据文献[27]修改)

Figure 1. Geotectonic units (a) and regional geological schematic map (b) in Yichang, Hubei Province

下载: 全尺寸图片幻灯片

图 2 湖北宜昌地区白垩纪地层的特征

Figure 2. Sedimentary characteristics of the Cretaceous strata in Yichang, Hubei Province

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图 3 湖北宜昌地区下白垩统五龙组砂岩的粒度分布曲线

a.五龙组砂岩的粒度频率分布曲线；b.五龙组砂岩的粒度概率累积曲线

Figure 3. Grain size distribution curves of the sandstones within the Lower Cretaceous Wulong Formation in Yichang, Hubei Province

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图 4 湖北宜昌地区下白垩统五龙组砂岩石英颗粒表面特征

圆圈指示了一些碟形和新月形撞击坑，箭头指示了撞击产生的鳞片状剥落

Figure 4. Surface features of the quartz grain of the sandstones within the Lower Cretaceous Wulong Formation in Yichang, Hubei Province

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图 5 湖北宜昌地区下白垩统五龙组砂岩样品(LQZ)的碎屑锆石Th/U

Figure 5. Detrital zircons Th/U of the sandstone (LQZ) samples within the Lower Cretaceous Wulong Formation in Yichang, Hubei Province

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图 6 江汉盆地不同地层单元碎屑锆石年龄谱图(数据引自文献[18-19, 44-45])

Figure 6. Age spectrum of detrital zircons from different stratigraphic units in Jianghan Basin

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图 7 湖北宜昌地区下白垩统五龙组风成砂岩的成因模式图

Figure 7. A genetic model of the aeolian sandstones within the Lower Cretaceous Wulong Formation in Yichang, Hubei Province

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图 8 下白垩统五龙组砂岩及其潜在物源区的碎屑锆石年龄谱

数据来源：黄陵隆起^[53-56], 秦岭造山带^[57-63], 大别造山带^[64-73], 江南造山带^{[39, 74-76]}, 扬子板块南华纪-侏罗纪地层^[77-83]

Figure 8. Age spectrum of detrital zircons of the aeolian sandstones within the Lower Cretaceous Wulong Formation and its potential sources

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表 1 湖北宜昌地区下白垩统五龙组砂岩粒度参数

Table 1. Grain-size parameters of the sandstone within the Lower Cretaceous Wulong Formation in Yichang, Hubei Province

样品	粒度平均值Mz/ϕ	偏度SK	峰态K_L
Y-1	4.35	0.27	0.87
Y-2	4.36	0.26	0.86
Y-3	4.38	0.27	0.86
Y-4	4.38	0.29	0.75
Y-5	4.39	0.28	0.75
Y-6	4.02	0.52	0.81
Y-7	4.02	0.52	0.81
平均值	4.27	0.34	0.82
注：测试单位为中国地质大学(武汉)流域关键带演化湖北省重点实验室; 测试仪器为Mastersizer 3000型激光粒度仪

下载: 导出CSV

表 2 湖北宜昌地区五龙组风成砂岩碎屑锆石年龄

Table 2. Detrital zircons U-Pb ages of the aeolian sandstones within the Wulong Formation in Yichang, Hubei Province

样品号	Th/U	比值							年龄/Ma						谐和度/%	最佳年龄/Ma	1σ
样品号	Th/U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ		²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	谐和度/%	最佳年龄/Ma	1σ
LQZ-1	0.98	0.051 92	0.002 01	0.266 55	0.010 36	0.037 36	0.000 58		283.4	88.9	239.9	8.3	236.5	3.6	98	236.5	3.6
LQZ-2	0.61	0.101 44	0.002 19	4.149 13	0.089 68	0.298 44	0.003 24		1 650.3	44.9	1 664.0	17.7	1 683.6	16.1	98	1 650.3	44.9
LQZ-3	1.19	0.065 90	0.001 36	1.225 96	0.024 66	0.135 56	0.001 22		1 200.0	47.2	812.5	11.3	819.5	7.0	99	819.5	7.0
LQZ-4	0.30	0.112 87	0.001 24	5.355 08	0.062 81	0.344 34	0.002 80		1 846.0	19.0	1 877.7	10.1	1 907.5	13.4	98	1 846.0	19.0
LQZ-5	0.49	0.116 43	0.001 39	5.650 03	0.069 54	0.352 62	0.002 99		1 902.2	21.8	1 923.8	10.7	1 947.1	14.3	98	1 902.2	21.8
LQZ-6	0.62	0.047 31	0.001 06	0.130 78	0.002 95	0.020 09	0.000 19		64.9	53.7	124.8	2.7	128.2	1.2	97	128.2	1.2
LQZ-7	0.41	0.102 91	0.001 63	4.314 68	0.071 42	0.305 04	0.003 05		1 677.5	29.3	1 696.2	13.7	1 716.2	15.1	98	1 677.5	29.3
LQZ-8	0.25	0.113 61	0.001 34	4.483 52	0.054 76	0.286 97	0.002 62		1 857.7	21.5	1 727.9	10.2	1 626.4	13.2	93	1 857.7	21.5
LQZ-9	0.81	0.172 91	0.002 55	11.674 33	0.179 08	0.491 73	0.005 33		2 587.0	24.4	2 578.6	14.5	2 578.1	23.1	99	2 587.0	24.4
LQZ-10	0.59	0.061 38	0.001 37	0.833 34	0.018 35	0.098 91	0.000 96		653.7	47.1	615.5	10.2	608.0	5.6	98	608.0	5.6
LQZ-11	1.02	0.054 74	0.001 90	0.276 71	0.009 53	0.037 13	0.000 46		466.7	75.9	248.0	7.6	235.0	2.8	94	235.0	2.8
LQZ-12	0.23	0.115 48	0.001 23	5.410 38	0.060 16	0.340 58	0.003 00		1 887.4	-13.4	1 886.5	9.6	1 889.5	14.5	99	1 887.4	-13.4
LQZ-14	0.65	0.068 82	0.001 54	1.225 78	0.028 47	0.129 07	0.001 13		894.4	41.7	812.4	13.0	782.5	6.5	96	782.5	6.5
LQZ-15	0.21	0.113 70	0.001 12	4.963 74	0.055 92	0.316 97	0.002 92		1 861.1	17.1	1 813.2	9.6	1 774.9	14.3	97	1 861.1	17.1
LQZ-16	0.62	0.131 18	0.001 66	7.143 95	0.093 52	0.395 82	0.003 62		2 113.9	22.5	2 129.5	11.7	2 149.8	16.7	99	2 113.9	22.5
LQZ-17	0.83	0.223 17	0.002 39	18.803 50	0.232 20	0.610 90	0.005 38		3 005.6	17.0	3 031.8	12.1	3 073.6	21.6	98	3 005.6	17.0
LQZ-18	0.45	0.076 17	0.001 06	2.001 32	0.028 99	0.191 08	0.001 80		1 099.7	27.8	1 116.0	9.8	1 127.2	9.8	98	1 099.7	27.8
LQZ-19	1.66	0.066 82	0.001 98	0.972 33	0.025 48	0.107 47	0.001 60		831.5	63.0	689.7	13.1	658.0	9.3	95	658.0	9.3
LQZ-20	1.41	0.068 13	0.001 56	1.240 09	0.029 19	0.132 35	0.001 35		872.2	43.5	818.9	13.2	801.3	7.7	97	801.3	7.7
LQZ-21	2.34	0.065 51	0.003 12	1.072 21	0.047 84	0.120 32	0.002 47		790.7	100.0	739.8	23.4	732.4	14.2	98	732.4	14.2
LQZ-22	0.48	0.194 08	0.002 05	13.701 43	0.147 57	0.513 23	0.004 57		2 776.9	16.5	2 729.3	10.4	2 670.4	19.5	97	2 776.9	16.5
LQZ-23	0.63	0.063 95	0.001 07	1.127 59	0.018 98	0.128 30	0.001 20		738.9	35.2	766.6	9.1	778.2	6.9	98	778.2	6.9
LQZ-25	0.63	0.135 96	0.001 73	6.919 77	0.089 85	0.369 67	0.003 25		2 176.2	22.2	2 101.2	11.6	2 027.9	15.3	96	2 176.2	22.2
LQZ-26	1.13	0.066 59	0.002 29	1.202 48	0.039 07	0.132 22	0.001 92		833.3	71.4	801.7	18.0	800.5	11.0	99	800.5	11.0
LQZ-27	0.52	0.154 11	0.001 72	9.426 51	0.106 38	0.443 90	0.003 43		2 392.3	18.8	2 380.4	10.5	2 368.1	15.4	99	2 392.3	18.8
LQZ-28	1.06	0.065 80	0.001 22	1.182 00	0.020 98	0.131 02	0.001 26		1 200.0	38.9	792.2	9.8	793.7	7.2	99	793.7	7.2
LQZ-29	0.72	0.131 17	0.001 76	5.837 74	0.084 59	0.323 27	0.003 16		2 113.9	19.4	1 952.0	12.6	1 805.7	15.4	92	2 113.9	19.4
LQZ-30	0.07	0.055 48	0.001 58	0.525 89	0.014 55	0.069 19	0.000 79		431.5	64.8	429.1	9.7	431.3	4.8	99	431.3	4.8
LQZ-31	0.15	0.116 50	0.001 27	5.306 61	0.060 71	0.330 54	0.002 73		1 903.4	20.2	1 869.9	9.9	1 841.0	13.3	98	1 903.4	20.2
LQZ-32	0.22	0.074 49	0.001 91	1.672 05	0.042 45	0.163 61	0.001 75		1 054.6	47.2	998.0	16.1	976.8	9.7	97	976.8	9.7
LQZ-33	1.08	0.070 33	0.002 36	1.139 22	0.037 57	0.118 67	0.001 56		938.9	63.9	772.1	17.8	722.9	9.0	93	722.9	9.0
LQZ-34	0.65	0.053 89	0.002 62	0.346 54	0.015 31	0.046 24	0.000 67		364.9	109.2	302.1	11.5	291.4	4.2	96	291.4	4.2
LQZ-35	0.28	0.056 06	0.001 37	0.558 51	0.013 56	0.072 68	0.000 74		453.8	55.6	450.6	8.8	452.3	4.5	99	452.3	4.5
LQZ-36	0.36	0.067 02	0.001 20	1.311 36	0.024 28	0.142 48	0.001 52		838.9	-162.0	850.7	10.7	858.7	8.6	99	858.7	8.6
LQZ-37	0.66	0.050 19	0.001 78	0.144 68	0.004 97	0.021 10	0.000 24		211.2	81.5	137.2	4.4	134.6	1.5	98	134.6	1.5
LQZ-38	0.60	0.051 27	0.002 22	0.254 26	0.010 91	0.036 40	0.000 59		253.8	100.0	230.0	8.8	230.5	3.7	99	230.5	3.7
LQZ-39	0.93	0.039 97	0.003 26	0.156 06	0.007 31	0.021 41	0.000 44		error	error	147.2	6.4	136.6	2.8	92	136.6	2.8
LQZ-40	0.65	0.166 68	0.001 55	11.201 76	0.108 64	0.487 90	0.003 62		2 524.4	15.7	2 540.1	9.2	2 561.6	15.8	99	2 524.4	15.7
LQZ-41	0.40	0.113 99	0.001 19	5.049 81	0.056 13	0.322 02	0.002 81		1 864.8	13.9	1 827.7	9.5	1 799.6	13.7	98	1 864.8	13.9
LQZ-42	0.71	0.162 05	0.002 02	10.865 50	0.156 54	0.486 98	0.004 96		2 476.8	20.2	2 511.7	13.5	2 557.6	21.5	98	2 476.8	20.2
LQZ-43	0.51	0.119 62	0.001 29	5.872 43	0.070 47	0.356 71	0.003 37		1 950.3	19.0	1 957.2	10.5	1 966.5	16.1	99	1 950.3	19.0
LQZ-44	0.25	0.115 08	0.001 15	5.409 27	0.063 30	0.341 43	0.003 27		1 881.2	17.1	1 886.3	10.1	1 893.5	15.8	99	1 881.2	17.1
LQZ-45	0.92	0.118 32	0.001 32	5.793 07	0.068 27	0.355 78	0.003 07		1 931.5	20.1	1 945.4	10.3	1 962.2	14.6	99	1 931.5	20.1
LQZ-46	1.39	0.121 14	0.001 29	5.735 18	0.070 40	0.343 69	0.003 13		1 973.2	18.8	1 936.7	10.7	1 904.4	15.0	98	1 973.2	18.8
LQZ-47	0.98	0.063 19	0.000 92	1.071 37	0.016 07	0.123 24	0.001 05		714.5	31.5	739.4	7.9	749.2	6.1	98	749.2	6.1
LQZ-48	0.84	0.113 54	0.001 76	4.473 21	0.077 31	0.286 03	0.002 91		1 857.4	28.1	1 726.0	14.4	1 621.7	14.6	93	1 857.4	28.1
LQZ-49	0.42	0.103 39	0.001 39	4.329 76	0.058 91	0.304 51	0.002 56		1 687.0	24.5	1 699.0	11.3	1 713.6	12.7	99	1 687.0	24.5
LQZ-50	0.29	0.113 26	0.001 38	5.095 88	0.065 53	0.326 64	0.002 68		1 853.7	22.2	1 835.4	11.0	1 822.1	13.0	99	1 853.7	22.2
LQZ-51	0.68	0.113 51	0.001 33	5.414 53	0.070 12	0.346 20	0.003 04		1 857.4	21.3	1 887.2	11.2	1 916.4	14.6	98	1 857.4	21.3
LQZ-52	0.89	0.112 41	0.002 09	5.407 24	0.100 76	0.349 18	0.003 27		1 838.6	33.2	1 886.0	16.0	1 930.7	15.6	97	1 838.6	33.2
LQZ-53	0.25	0.049 06	0.000 99	0.188 52	0.003 86	0.027 95	0.000 26		150.1	48.1	175.4	3.3	177.7	1.7	98	177.7	1.7
LQZ-54	0.34	0.114 47	0.001 19	5.332 30	0.066 98	0.337 83	0.003 20		1 872.2	23.1	1 874.1	10.8	1 876.2	15.5	99	1 872.2	23.1
LQZ-55	0.21	0.116 45	0.001 15	5.530 69	0.063 66	0.344 47	0.002 91		1 902.8	17.6	1 905.4	10.0	1 908.2	14.0	99	1 902.8	17.6
LQZ-56	0.67	0.115 47	0.001 74	5.647 62	0.080 00	0.356 54	0.003 28		1 887.4	26.4	1 923.4	12.3	1 965.7	15.6	97	1 887.4	26.4
LQZ-57	1.12	0.155 31	0.002 14	8.291 61	0.111 65	0.388 69	0.003 58		2 405.2	22.7	2 263.4	12.3	2 116.8	16.6	93	2 405.2	22.7
LQZ-59	0.52	0.132 44	0.002 45	6.968 02	0.141 29	0.381 74	0.005 11		2 131.5	32.4	2 107.4	18.1	2 084.4	23.9	98	2 131.5	32.4
LQZ-60	0.55	0.065 51	0.001 39	1.104 97	0.022 12	0.123 11	0.001 24		790.7	44.4	755.8	10.7	748.5	7.1	99	748.5	7.1
LQZ-61	0.25	0.112 99	0.001 19	4.695 69	0.055 00	0.301 55	0.002 72		1 847.8	52.3	1 766.5	9.9	1 699.0	13.5	96	1 847.8	52.3
LQZ-62	0.70	0.112 42	0.001 26	5.072 08	0.063 35	0.327 22	0.002 91		1 839.2	19.3	1 831.4	10.7	1 824.9	14.2	99	1 839.2	19.3
LQZ-63	0.34	0.068 36	0.001 77	1.376 23	0.034 96	0.147 11	0.001 58		879.6	49.1	878.8	14.9	884.8	8.9	99	884.8	8.9
LQZ-64	0.52	0.065 14	0.000 94	1.149 81	0.017 12	0.128 20	0.001 12		788.9	29.6	777.2	8.1	777.6	6.4	99	777.6	6.4
LQZ-65	1.20	0.060 24	0.001 72	0.490 45	0.013 62	0.059 15	0.000 67		613.0	61.1	405.2	9.3	370.5	4.1	91	370.5	4.1
LQZ-66	1.95	0.040 65	0.003 94	0.135 74	0.008 23	0.018 77	0.000 44		error	error	129.2	7.4	119.9	2.8	92	119.9	2.8
LQZ-67	0.70	0.045 39	0.003 98	0.154 47	0.009 04	0.021 39	0.000 46		error		145.8	8.0	136.4	2.9	93	136.4	2.9
LQZ-69	0.81	0.112 15	0.001 28	5.290 03	0.063 06	0.342 67	0.002 99	1 835.2	20.7	1 867.3	10.3	1 899.5	14.4	98	1 835.2	20.7
LQZ-70	0.11	0.126 69	0.001 43	5.276 53	0.060 05	0.302 14	0.002 50	2 053.7	20.1	1 865.1	9.8	1 701.9	12.4	90	2 053.7	20.1
LQZ-71	0.75	0.104 74	0.002 13	4.471 64	0.087 15	0.311 67	0.003 02	1 709.6	37.2	1 725.7	16.2	1 748.9	14.9	98	1 709.6	37.2
LQZ-72	0.69	0.067 10	0.000 86	1.325 45	0.018 39	0.143 24	0.001 19	842.6	32.4	856.9	8.1	863.0	6.7	99	863.0	6.7
LQZ-73	0.48	0.105 79	0.001 30	4.128 12	0.054 88	0.283 08	0.002 26	1 728.1	22.4	1 659.9	10.9	1 606.8	11.4	96	1 728.1	22.4
LQZ-74	0.72	0.066 58	0.001 03	1.212 71	0.018 11	0.132 42	0.001 02	833.3	32.6	806.4	8.3	801.7	5.8	99	801.7	5.8
LQZ-75	0.71	0.113 26	0.001 40	5.249 83	0.068 52	0.336 54	0.002 92	1 853.7	22.2	1 860.7	11.2	1 870.0	14.1	99	1 853.7	22.2
LQZ-76	0.28	0.050 34	0.000 75	0.189 61	0.002 93	0.027 35	0.000 25	209.3	39.8	176.3	2.5	174.0	1.6	98	174.0	1.6
LQZ-77	0.36	0.114 64	0.001 23	5.055 46	0.058 41	0.320 02	0.002 68	1 875.9	19.9	1 828.7	9.9	1 789.8	13.1	97	1 875.9	19.9
LQZ-78	0.77	0.051 01	0.002 54	0.152 11	0.007 11	0.020 87	0.000 31	242.7	114.8	143.8	6.3	133.2	1.9	92	133.2	1.9
LQZ-79	0.78	0.065 73	0.001 29	1.129 95	0.020 54	0.125 69	0.001 16	798.2	36.1	767.7	9.8	763.2	6.7	99	763.2	6.7
LQZ-80	0.23	0.114 12	0.001 12	5.210 58	0.059 27	0.330 86	0.002 56	1 865.7	17.9	1 854.3	9.8	1 842.6	12.4	99	1 865.7	17.9
LQZ-81	0.62	0.160 15	0.001 61	10.702 47	0.120 54	0.484 22	0.003 57	2 457.1	17.7	2 497.6	10.6	2 545.6	15.6	98	2 457.1	17.7
LQZ-82	0.43	0.114 46	0.001 51	5.251 36	0.072 65	0.333 41	0.003 05	1 872.2	24.1	1 861.0	11.9	1 854.9	14.8	99	1 872.2	24.1
LQZ-83	1.07	0.158 85	0.001 76	9.691 28	0.111 62	0.443 00	0.003 61	2 443.5	18.8	2 405.9	10.7	2 364.0	16.2	98	2443.5	18.8
LQZ-84	1.26	0.053 52	0.001 67	0.307 73	0.009 31	0.042 12	0.000 45	350.1	70.4	272.4	7.2	266.0	2.8	97	266.0	2.8
LQZ-85	0.97	0.111 87	0.001 22	4.634 40	0.059 00	0.300 34	0.002 57	1 831.5	19.9	1 755.5	10.7	1 693.0	12.8	96	1 831.5	19.9
LQZ-86	1.47	0.165 45	0.001 65	10.568 72	0.125 67	0.463 13	0.003 90	2 512.0	16.7	2 486.0	11.2	2 453.4	17.2	98	2 512.0	16.7
LQZ-87	0.68	0.175 07	0.002 33	11.719 98	0.158 27	0.486 85	0.004 15	2 606.5	22.2	2 582.3	12.8	2 557.0	18.0	99	2 606.5	22.2
LQZ-88	1.11	0.159 32	0.001 67	10.458 16	0.122 99	0.476 49	0.003 91	2 450.0	17.4	2 476.2	11.0	2 512.0	17.1	98	2 450.0	17.4
LQZ-89	0.53	0.165 62	0.001 58	11.133 19	0.163 44	0.487 62	0.006 11	2 513.9	16.8	2 534.3	13.8	2 560.4	26.5	98	2 513.9	16.8
LQZ-90	0.97	0.069 50	0.002 95	1.334 21	0.052 39	0.140 02	0.001 89	922.2	82.4	860.7	22.8	844.8	10.7	98	844.8	10.7
LQZ-91	0.59	0.068 38	0.000 95	1.362 86	0.019 75	0.144 68	0.001 12	879.6	28.9	873.1	8.5	871.1	6.3	99	871.1	6.3
LQZ-92	0.71	0.074 42	0.002 01	1.528 07	0.041 33	0.149 73	0.001 58	1 053.7	54.2	941.7	16.6	899.5	8.8	95	899.5	8.8
LQZ-93	0.40	0.127 98	0.003 31	6.289 68	0.160 53	0.361 29	0.005 12	2 070.1	46.5	2 017.0	22.4	1 988.3	24.3	98	2 070.1	46.5
LQZ-94	1.02	0.106 65	0.001 52	4.282 39	0.066 08	0.291 62	0.002 69	1 742.9	26.1	1 690.0	12.8	1 649.6	13.5	97	1 742.9	26.1
LQZ-96	2.29	0.063 37	0.000 71	0.954 13	0.014 17	0.109 35	0.001 30	720.4	24.1	680.2	7.4	669.0	7.6	98	669.0	7.6
LQZ-97	0.57	0.107 82	0.001 39	4.383 17	0.063 34	0.294 95	0.002 65	1 762.7	23.9	1 709.2	12.0	1 666.2	13.2	97	1 762.7	23.9
LQZ-98	1.09	0.069 13	0.002 15	1.231 63	0.038 64	0.130 06	0.001 41	901.9	63.0	815.1	17.6	788.2	8.1	96	788.2	8.1
LQZ-99	0.86	0.116 07	0.001 35	5.427 33	0.064 93	0.339 88	0.003 08	1 898.2	20.8	1 889.2	10.3	1 886.1	14.8	99	1 898.2	20.8
LQZ-101	0.65	0.130 16	0.001 62	7.360 33	0.100 95	0.410 67	0.003 97	2 101.9	21.1	2 156.2	12.3	2 218.0	18.2	97	2 101.9	21.1
LQZ-102	0.84	0.067 60	0.000 86	1.251 65	0.019 49	0.134 19	0.001 38	857.4	25.9	824.2	8.8	811.7	7.9	98	811.7	7.9
LQZ-103	0.61	0.079 33	0.001 45	1.756 36	0.043 94	0.160 51	0.002 89	1 180.6	36.3	1 029.5	16.2	959.6	16.1	92	959.6	16.1
LQZ-104	1.61	0.064 71	0.001 42	1.175 21	0.026 55	0.132 09	0.001 29	764.8	45.5	789.1	12.4	799.8	7.3	98	799.8	7.3
LQZ-105	0.49	0.118 63	0.001 37	5.702 71	0.070 41	0.349 31	0.003 09	1 935.5	25.0	1 931.8	10.7	1 931.3	14.8	99	1 935.5	25.0
LQZ-106	0.37	0.081 02	0.001 11	2.297 59	0.032 86	0.206 11	0.001 80	1 221.9	27.8	1 211.5	10.2	1 208.1	9.6	99	1 221.9	27.8
LQZ-107	0.64	0.052 95	0.001 81	0.309 71	0.010 59	0.042 68	0.000 52	327.8	105.5	274.0	8.2	269.4	3.2	98	269.4	3.2
LQZ-108	0.16	0.068 42	0.000 96	1.505 39	0.023 19	0.159 52	0.001 38	881.2	27.8	932.6	9.4	954.1	7.7	97	954.1	7.7
LQZ-109	1.06	0.061 56	0.001 62	0.585 18	0.014 58	0.069 29	0.000 84	657.4	55.6	467.8	9.3	431.8	5.1	92	431.8	5.1
LQZ-110	0.36	0.118 72	0.001 20	5.626 62	0.060 36	0.343 84	0.002 44	1 938.9	17.4	1 920.2	9.3	1 905.1	11.8	99	1 938.9	17.4
LQZ-111	0.12	0.116 44	0.001 35	5.211 49	0.063 46	0.325 03	0.002 56	1 902.2	21.5	1 854.5	10.5	1 814.2	12.5	97	1 902.2	21.5
LQZ-112	0.53	0.160 44	0.001 77	10.275 06	0.130 37	0.464 54	0.004 20	2 460.2	18.1	2 459.9	11.9	2 459.6	18.5	99	2 460.2	18.1
LQZ-113	0.76	0.067 09	0.000 89	1.151 38	0.016 62	0.124 45	0.001 04	840.4	32.4	777.9	7.9	756.1	6.0	97	756.1	6.0
LQZ-114	0.49	0.054 95	0.001 27	0.218 22	0.005 07	0.028 91	0.000 27	409.3	47.2	200.4	4.2	183.7	1.7	91	183.7	1.7
LQZ-115	0.37	0.126 37	0.001 52	5.189 78	0.069 40	0.298 06	0.002 81	2 047.8	20.8	1 850.9	11.5	1 681.7	14.0	90	2 047.8	20.8
LQZ-116	0.71	0.157 79	0.002 29	8.124 52	0.124 67	0.375 37	0.004 62	2 431.8	25.2	2 245.0	14.0	2 054.6	21.7	91	2 431.8	25.2
LQZ-117	0.75	0.110 64	0.002 78	4.618 16	0.111 89	0.306 63	0.003 91	1 810.2	45.2	1 752.6	20.3	1 724.1	19.3	98	1 810.2	45.2
LQZ-118	0.78	0.069 17	0.001 51	1.042 71	0.021 02	0.110 43	0.001 24	903.4	45.2	725.3	10.5	675.2	7.2	92	675.2	7.2
LQZ-119	0.05	0.050 75	0.001 76	0.273 52	0.009 34	0.039 16	0.000 46	227.8	81.5	245.5	7.4	247.6	2.8	99	247.6	2.8
LQZ-120	1.13	0.149 51	0.002 11	8.966 14	0.153 68	0.435 91	0.005 64	2 340.4	23.9	2 334.6	15.7	2 332.3	25.3	99	2 340.4	23.9
注：测试单位为中国地质大学(武汉)地质过程与矿产资源国家重点实验室；测试仪器为LA-ICP-MS激光剥蚀等离子体质谱仪

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参考文献(86)

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