内蒙乌拉特中旗图古日格二叠纪角闪石岩年龄、岩石成因及构造背景

王键; 孙丰月; 李碧乐; 王英德; 李睿华

doi:10.3799/dqkx.2016.067

内蒙乌拉特中旗图古日格二叠纪角闪石岩年龄、岩石成因及构造背景

doi: 10.3799/dqkx.2016.067

吉林大学地球科学学院，吉林长春 130061

基金项目:

国家自然科学基金项目 41272093

中国地质调查局项目 12120113098300

详细信息

作者简介:
王键(1987-)，男，博士研究生，主要从事岩石学、矿物学、矿床学方面的研究.E-mail: wjian118@hotmail.com

通讯作者:
孙丰月，E-mail: sunfy_66@126.com

中图分类号: P597
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出版历程
- 收稿日期: 2016-02-26
- 刊出日期: 2016-05-15

Age, Petrogenesis and Tectonic Implications of Permian Hornblendite in Tugurige, Urad Zhongqi, Inner Mongolia

College of Earth Sciences, Jilin University, Changchun 130061, China

摘要

摘要: 为了对古亚洲洋的演化提供新的资料，对内蒙中部乌拉特中旗图古日格角闪石岩进行了角闪石电子探针分析、锆石LA-ICP-MS U-Pb年代学，锆石Hf同位素和岩石地球化学分析，以确定其岩石成因及其地球动力学背景.两件测年样品加权平均年龄分别为273.5±1.3 Ma(MSWD=0.48) 和274.4±4.3 Ma(MSWD=0.041)，属于早二叠世晚期.角闪石岩贫SiO₂、Na₂O、K₂O，富Al₂O₃、TFe₂O₃、MgO和CaO，Mg^#值为46.95~63.53，M/F比值为0.87~1.72；稀土元素配分曲线为右倾型，和原始地幔相比明显富集大离子亲石元素(Rb、Ba、K)，而高场强元素Nb、Ta和Ti相对亏损，Th、U同样显示出相对亏损.电子探针分析结果表明角闪石岩中角闪石属于钙质角闪石，具有幔源角闪石的特点.角闪石岩中锆石的ε _Hf(t)值为-0.3~8.5，锆石Hf单阶段模式年龄(t _DM1)为580~920 Ma.研究表明其源区主要为亏损地幔，上涌过程中与富集岩石圈地幔发生相互作用，形成具有富集地幔特征岩浆.结合区域地质演化，认为角闪石岩形成于古亚洲洋闭合后的伸展环境，可能与俯冲板片的断离有关.
- 内蒙 /
- 乌拉特中旗 /
- 晶体化学 /
- 年代学 /
- 地球化学 /
- Hf同位
Abstract: Electron microprobe results, zircon U-Pb dating, Hf isotope data and geochemistry of hornblendite at Tugurige, Urad Zhongqi, Inner Mongolia are reported in the paper, which provide constraints on formation time, magma source, and tectonic setting of the intrusions. The dating results indicate that the hornblendite formed in the late Early Permian (273.5±1.3 Ma, MSWD=0.48; 274.4±4.3 Ma, MSWD=0.041), and it contains low Na₂O and K₂O, high Al₂O₃, TFe₂O₃, MgO, CaO, Mg^#=46.95-63.53, M/F=0.87-1.72. Chondrite-normalized REE patterns show LREE enrichment. On a trace element spider diagram, large ion lithophile elements (LILEs) such as Rb, Ba and K are enriched, whereas the high field strength elements Ti, P, Th and U are relatively depleted. Electronic Probe analysis results show that hornblende belongs to calcic amphibole and has the characteristics of mantle hornblende. The ε _Hf(t) values of zircons from the hornblendite vary between -0.3 and 8.5, and their Hf one-stage model ages vary from 580 to 920 Ma, implying that their magma source was derived from a depleted mantle and may have been added metasomatic enriched lithospheric mantle components. Combined with regional tectonic evolution, the hornblendite formed in the post-collisional extension setting, perhaps triggered by slab break-off.
- Inner Mongolia /
- Urad Zhongqi /
- crystal chemistry /
- geochronology /
- geochemistry /
- Hf isotope

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图 1 中亚造山带东部构造地质简图

据Xiao et al.(2009)

Fig. 1. Tectonic sketch of eastern Central Asian orogenic belt

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图 2 乌拉特中旗图古日格地区地质

据核工业二〇八大队内部资料(2013) 改

Fig. 2. Detailed geological sketch of Tugurige, Urad Zhongqi

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图 3 图古日格早二叠世角闪石岩显微照片

a，b.角闪石呈长柱状，粒状，边部可见少量绿帘石化(单偏光)；c.角闪石两组斜交节理，Ⅱ级蓝干涉色(正交偏光)；d.角闪石岩中的白云母化(正交偏光)；Mg-Hs.镁铝钙闪石；Mag.磁铁矿；Chl.绿泥石；Ms.白云母

Fig. 3. Microphotographs of Early Permian hornblendite

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图 4 角闪石的成分变化与定名

Ca_B.B位置Ca原子数；(Na+K)_A.A位置Na与K原子数之和；TSi.T位置Si原子数；Al^Ⅵ.C位置Al^Ⅵ的原子数；Fe³⁺.C位置Fe³⁺的原子数；据Leake(1997)

Fig. 4. Classification of hornblendes

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图 5 图古日格角闪石岩部分锆石阴极发光图像

Fig. 5. Cathodoluminescence images of analyzed zircons from Tugurige hornblendite

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图 6 角闪石岩样品中锆石的U-Pb年龄谐和图和加权平均年龄

a.样品1##中锆石U-Pb年龄谐和图；b.样品1##锆石年龄加权图；c.样品TG-3中锆石U-Pb年龄谐和图；d.样品TG-3锆石年龄加权图

Fig. 6. Zircons U-Pb concordia diagram and weighted average ages diagram for hornblendite

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图 7 图古日格角闪石岩稀土元素配分模式(a)和微量元素蛛网图(b)

图a球粒陨石值据Boynton(1984); 图b原始地幔值据Sun and McDonough(1989)

Fig. 7. >Chondrite-normalized REE patterns(a) and primitive mantle-normalized trace element patterns(b) for the Tugurige hornblendite

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图 8 角闪石Al-Si图解

图据姜常义和安三元(1984)修改

Fig. 8. Al-Si Diagram of crystal-chemical genesis of horblende

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图 9 图古日格角闪石岩Th/Yb-Nb/Yb图解(a)、Ba/Th-Th/Nb图解(b)和Nb/Zr-Th/Zr图解(c)

图a据Pearce(2008)；图b据Hanyu et al.(2006)；图c据Woodhead et al.(2001)

Fig. 9. Th/Yb-Nb/Yb, Ba/Th-Th/Nb and Nb/Zr-Th/Zr diagrams of Tugurige hornblendite

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图 10 图古日格角闪石岩锆石ε_Hf(t)-t图解

据Yang et al.(2006)

Fig. 10. ε_Hf(t)-t diagram of Tugurige hornblendite

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图 11 图古日格角闪石岩Ti-Zr图解

Fig. 11. Ti-Zr diagram of Tugurige hornblendite

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图 12 图古日格角闪石岩形成构造模式

Fig. 12. Structure model diagram of Tugurige hornblendite

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表 1 图古日格角闪石岩中角闪石电子探针分析结果

Table 1. Results of electron microprobe analysis of Tugurige hornblendite

	样品	TG3-1	TG3-2	TG3-3	TG3-4	TG3-5	TG3-6	TG4-1	TG4-2	TG4-3	TG4-4	TG4-5	TG4-6
	SiO₂	40.96	41.75	40.91	43.37	41.27	40.57	41.84	41.19	41.29	42.06	42.09	41.58
	TiO₂	2.47	2.34	2.41	1.91	2.64	2.39	1.06	2.10	3.19	2.56	2.41	2.28
	Al₂O₃	13.28	12.69	13.21	10.87	13.58	12.99	13.17	12.72	12.63	12.33	12.19	12.86
	TFeO	13.40	14.54	14.07	15.49	12.90	16.14	15.53	12.81	13.28	13.07	13.97	12.52
百分含量	Cr₂O₃	0.02	0.00	0.00	0.00	0.01	0.01	0.14	0.00	0.00	0.01	0.00	0.02
	MnO	0.18	0.20	0.17	0.24	0.17	0.22	0.21	0.14	0.14	0.15	0.20	0.18
	MgO	11.84	11.60	11.59	11.82	12.24	10.49	11.23	11.91	12.35	12.65	12.00	12.34
	CaO	11.13	11.05	11.25	10.87	11.19	11.01	11.10	11.30	11.08	11.40	11.05	11.33
	CoO	0.01	0.06	0.07	0.04	0.01	0.00	0.07	0.04	0.07	0.03	0.02	0.04
	NiO	0.01	0.03	0.02	0.00	0.02	0.02	0.00	0.00	0.00	0.00	0.01	0.04
	K₂O	0.96	1.08	0.90	0.88	0.80	0.97	0.74	0.92	0.85	0.91	1.00	0.79
	Na₂O	2.36	2.23	2.33	2.06	2.28	2.18	2.22	2.21	2.13	2.17	2.18	2.27
	Total	96.61	97.56	96.94	97.55	97.11	96.99	97.31	95.34	96.99	97.34	97.12	96.25
T	Si	6.17	6.29	6.16	6.53	6.22	6.11	6.30	6.20	6.22	6.34	6.34	6.26
T	Al^Ⅳ	1.83	1.71	1.84	1.47	1.78	1.89	1.70	1.80	1.78	1.66	1.66	1.74
C	Al^Ⅵ	0.52	0.54	0.50	0.46	0.62	0.41	0.64	0.46	0.46	0.52	0.50	0.54
	Ti	0.25	0.23	0.24	0.19	0.26	0.24	0.11	0.21	0.32	0.26	0.24	0.23
	Cr	0.00	0.00	0.00	0.00	0.00	0.00	0.02	0.00	0.00	0.00	0.00	0.00
	Fe³⁺	1.47	1.58	1.53	1.65	1.33	1.53	1.69	1.04	1.42	1.35	1.52	1.40
	Mn	0.02	0.03	0.02	0.03	0.02	0.03	0.03	0.02	0.02	0.02	0.03	0.02
	Mg	2.67	2.62	2.62	2.67	2.77	2.37	2.54	2.69	2.79	2.86	2.71	2.79
	Fe²⁺	0.06	0.00	0.08	0.00	0.00	0.42	0.00	0.58	0.00	0.00	0.00	0.01
B	Ca	1.80	1.78	1.82	1.75	1.81	1.78	1.79	1.82	1.79	1.84	1.78	1.83
B	Na	0.20	0.22	0.18	0.25	0.19	0.22	0.21	0.18	0.21	0.16	0.22	0.17
A	Na	0.48	0.43	0.50	0.36	0.47	0.41	0.44	0.47	0.41	0.47	0.42	0.49
A	K	0.18	0.21	0.17	0.17	0.15	0.19	0.14	0.18	0.16	0.18	0.19	0.15
Fe³⁺+Fe²⁺		1.53	1.58	1.61	1.65	1.33	1.95	1.69	1.62	1.42	1.35	1.52	1.42
Mg/(Mg+Fe²⁺)		0.98	1.00	0.97	1.00	1.00	0.85	1.00	0.82	1.00	1.00	1.00	1.00
Si/(Si+Ti+Al)		0.703	0.717	0.705	0.755	0.700	0.706	0.721	0.716	0.709	0.722	0.725	0.714
Ca/(Ca+Mg+Fe)		0.30	0.30	0.30	0.29	0.31	0.29	0.30	0.30	0.30	0.30	0.30	0.30

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表 2 图古日格角闪石岩锆石LA-ICP-MS U-Pb同位素定年结果

Table 2. Results of LA-ICP-MS zircon U-Pb dating of Tugurige hornblendite

测点号	Pb(10^-6)	Th(10^-6)	U(10^-6)	Th/U	²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁶Pb/²³⁸U
测点号	Pb(10^-6)	Th(10^-6)	U(10^-6)	Th/U	比值	1σ	比值	1σ	比值	1σ	年龄(Ma)	1σ
1##-1	43.7	177.2	311.1	0.57	0.052 1	0.002 3	0.309 2	0.013 4	0.043 2	0.000 5	273	3
1##-2	34.6	130.8	258.1	0.51	0.051 8	0.002 1	0.310 5	0.012 7	0.043 3	0.000 4	273	3
1##-3	58.3	246.1	348.6	0.71	0.052 8	0.005 7	0.313 3	0.033 3	0.043 2	0.000 8	273	5
1##-4	47.4	200.3	302.0	0.66	0.049 6	0.001 9	0.297 3	0.011 1	0.043 8	0.000 5	277	3
1##-5	89.0	345.4	632.2	0.55	0.051 5	0.001 9	0.312 5	0.012 2	0.043 8	0.000 5	276	3
1##-6	50.1	208.5	363.4	0.57	0.047 4	0.001 9	0.281 7	0.011 5	0.043 0	0.000 4	271	3
1##-7	76.1	330.6	440.5	0.75	0.049 5	0.001 9	0.292 6	0.011 0	0.042 8	0.000 4	270	2
1##-8	118.8	510.9	742.6	0.69	0.050 5	0.001 3	0.302 2	0.008 2	0.043 0	0.000 3	272	2
1##-9	26.4	101.1	179.6	0.56	0.051 7	0.003 5	0.310 1	0.021 6	0.043 3	0.000 7	273	5
1##-10	72.0	318.5	488.0	0.65	0.050 0	0.002 7	0.299 2	0.015 5	0.043 3	0.000 6	273	4
1##-11	55.3	233.1	358.6	0.65	0.053 1	0.004 1	0.318 1	0.024 1	0.043 8	0.000 7	276	4
1##-12	29.9	135.2	249.8	0.54	0.049 2	0.004 9	0.299 5	0.031 0	0.043 5	0.000 8	275	5
1##-13	38.7	154.9	285.9	0.54	0.050 9	0.002 2	0.304 9	0.013 0	0.043 6	0.000 5	275	3
1##-14	66.0	289.4	398.8	0.73	0.050 2	0.001 8	0.299 4	0.010 6	0.043 1	0.000 4	272	2
1##-15	39.3	161.9	265.1	0.61	0.050 4	0.002 3	0.303 7	0.013 8	0.043 5	0.000 5	275	3
1##-16	52.8	227.3	357.5	0.64	0.050 5	0.002 8	0.303 6	0.015 6	0.043 7	0.000 6	276	3
1##-17	49.0	200.4	353.8	0.57	0.053 0	0.001 7	0.316 7	0.010 4	0.043 1	0.000 4	272	2
1##-18	55.5	218.9	365.3	0.60	0.051 1	0.001 9	0.307 2	0.011 0	0.043 5	0.000 4	275	2
1##-19	190.4	854.3	746.0	1.15	0.050 7	0.001 4	0.306 8	0.008 2	0.043 7	0.000 3	276	2
1##-20	25.3	100.5	170.5	0.59	0.052 7	0.003 2	0.307 8	0.017 3	0.043 5	0.000 6	274	3
TG-3-1	14.0	200.3	247.8	0.81	0.051 8	0.002 9	0.310 5	0.019 0	0.043 5	0.001 8	274	11
TG-3-2	31.1	440.1	569.0	0.77	0.052 0	0.001 9	0.311 4	0.013 9	0.043 5	0.001 7	274	11
TG-3-3	11.1	121.8	194.8	0.63	0.052 0	0.002 5	0.310 6	0.016 8	0.043 3	0.001 8	273	11
TG-3-4	55.7	556.4	1 068.0	0.52	0.054 3	0.001 8	0.324 9	0.013 6	0.043 4	0.001 7	274	11
TG-3-5	95.6	1 012.1	2 146.9	0.47	0.051 2	0.001 6	0.306 4	0.012 5	0.043 4	0.001 7	274	11
TG-3-6	40.3	761.4	630.6	1.21	0.051 9	0.002 1	0.311 0	0.014 9	0.043 5	0.001 8	274	11
TG-3-7	29.9	449.6	536.7	0.84	0.054 2	0.002 6	0.319 8	0.017 1	0.042 8	0.001 8	270	11
TG-3-8	25.1	398.3	472.4	0.84	0.051 5	0.002 0	0.309 2	0.014 1	0.043 6	0.001 8	275	11
TG-3-9	73.8	1 344.4	1 332.0	1.01	0.051 7	0.001 7	0.308 5	0.013 0	0.043 3	0.001 7	273	11
TG-3-10	88.3	1 763.9	1 250.1	1.41	0.051 5	0.002 9	0.309 3	0.018 6	0.043 6	0.001 8	275	11
TG-3-11	165.9	3 119.5	2 847.9	1.10	0.052 0	0.001 7	0.310 0	0.013 0	0.043 3	0.001 7	273	11
TG-3-12	120.6	1 872.8	2 096.7	0.89	0.051 1	0.001 6	0.307 1	0.012 5	0.043 6	0.001 8	275	11
TG-3-13	75.8	1 936.6	1 132.4	1.71	0.051 8	0.001 8	0.310 9	0.013 3	0.043 5	0.001 8	275	11
TG-3-14	29.0	299.4	504.7	0.59	0.051 6	0.002 5	0.308 6	0.016 8	0.043 4	0.001 8	274	11
TG-3-15	94.2	957.8	2 041.9	0.47	0.051 7	0.001 8	0.309 2	0.013 2	0.043 4	0.001 8	274	11
TG-3-16	21.8	133.7	448.8	0.30	0.050 0	0.001 9	0.298 9	0.013 5	0.043 3	0.001 8	274	11
TG-3-17	74.7	1 094.6	1 281.5	0.85	0.051 5	0.002 1	0.310 1	0.014 6	0.043 7	0.001 8	276	11
TG-3-18	42.2	397.3	860.0	0.46	0.051 5	0.001 9	0.308 1	0.014 0	0.043 4	0.001 8	274	11
TG-3-19	37.9	744.2	537.2	1.39	0.052 3	0.003 1	0.312 6	0.020 1	0.043 3	0.001 8	273	11
TG-3-20	22.9	184.4	435.1	0.42	0.050 0	0.001 8	0.309 2	0.013 4	0.044 8	0.001 8	283	11
TG-3-21	28.7	225.1	581.0	0.39	0.051 6	0.001 9	0.308 4	0.013 8	0.043 3	0.001 8	274	11
TG-3-22	124.2	4 611.9	1 706.3	2.70	0.051 3	0.002 0	0.308 4	0.014 4	0.043 6	0.001 8	275	11
TG-3-23	47.6	555.1	910.0	0.61	0.051 3	0.003 2	0.313 8	0.020 8	0.044 3	0.001 9	280	12
TG-3-24	178.6	2 543.6	3 706.5	0.69	0.051 1	0.001 8	0.306 6	0.013 2	0.043 5	0.001 8	275	11
TG-3-25	29.4	257.3	556.8	0.46	0.051 9	0.003 6	0.309 6	0.022 5	0.043 3	0.001 9	273	11

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表 3 图古日格角闪石岩中锆石Lu-Hf同位素组成

Table 3. Zircon Lu-Hf isotopic compositions of hornblendite in Tugurige

点号	年龄(Ma)	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	2σ	(¹⁷⁶Hf/¹⁷⁷Hf)_i	ε_Hf(0)	ε_Hf(t)	t_DM1(Ma)	f_Lu/Hf
1##-1	273	0.028 163	0.000 848	0.282 697	0.000 013	0.282 692	-2.7	3.2	784	-0.97
1##-2	273	0.027 582	0.000 835	0.282 648	0.000 011	0.282 644	-4.4	1.5	851	-0.97
1##-3	273	0.062 803	0.001 763	0.282 840	0.000 013	0.282 831	2.4	8.1	596	-0.95
1##-4	273	0.035 875	0.001 088	0.282 719	0.000 012	0.282 713	-1.9	3.9	757	-0.97
1##-5	273	0.041 498	0.001 236	0.282 731	0.000 013	0.282 725	-1.4	4.3	743	-0.96
1##-6	273	0.037 576	0.001 129	0.282 717	0.000 012	0.282 711	-1.9	3.9	760	-0.97
1##-7	273	0.026 663	0.000 813	0.282 681	0.000 013	0.282 677	-3.2	2.6	805	-0.98
1##-8	273	0.029 553	0.000 909	0.282 675	0.000 013	0.282 671	-3.4	2.4	815	-0.97
1##-9	273	0.026 114	0.000 811	0.282 662	0.000 011	0.282 658	-3.9	2.0	831	-0.98
1##-10	273	0.030 634	0.000 930	0.282 684	0.000 013	0.282 679	-3.1	2.7	803	-0.97
1##-11	273	0.021 323	0.000 653	0.282 650	0.000 012	0.282 646	-4.3	1.6	845	-0.98
1##-12	273	0.020 151	0.000 613	0.282 656	0.000 009	0.282 653	-4.1	1.8	835	-0.98
1##-13	273	0.065 582	0.001 881	0.282 852	0.000 015	0.282 842	2.8	8.5	580	-0.94
1##-14	273	0.029 505	0.000 880	0.282 680	0.000 012	0.282 676	-3.2	2.6	807	-0.97
1##-15	273	0.023 300	0.000 701	0.282 597	0.000 012	0.282 593	-6.2	-0.3	920	-0.98
注：ε_Hf(0)=[(¹⁷⁶Hf/¹⁷⁷Hf)_S/(¹⁷⁶Hf/¹⁷⁷Hf)_{CHUR, 0}-1]×10⁴；ε_Hf(t)={[(¹⁷⁶Hf/¹⁷⁷Hf)_S-(¹⁷⁶Lu/¹⁷⁷Hf)_S×(e^λt-1)]/[(¹⁷⁶Hf/¹⁷⁷Hf)_{CHUR, 0}-(¹⁷⁶Lu/¹⁷⁷Hf)_CHUR×(e^λt-1)]-1}×10⁴；t_DM1=1/λ×{1+[(¹⁷⁶Hf/¹⁷⁷Hf)_S-(¹⁷⁶Hf/¹⁷⁷Hf)_DM)/(¹⁷⁶Lu/¹⁷⁷Hf)_S-(¹⁷⁶Lu/¹⁷⁷Hf)_DM]}；f_Lu/Hf=(¹⁷⁶Lu/¹⁷⁷Hf)_S/(¹⁷⁶Lu/¹⁷⁷Hf)_CHUR-1；其中，(¹⁷⁶Lu/¹⁷⁷Hf)_S和(¹⁷⁶Hf/¹⁷⁷Hf)_S为样品测定值，(¹⁷⁶Lu/¹⁷⁷Hf)_CHUR=0.032 200，(¹⁷⁶Hf/¹⁷⁷Hf)_{CHUR, 0}=0.282 772；(¹⁷⁶Lu/¹⁷⁷Hf)_DM=0.038 400，(¹⁷⁶Hf/¹⁷⁷Hf)_DM=0.283 250；f_CC、f_S、f_DM分别为大陆地壳、样品和亏损地幔的f_Lu/Hf，t为样品形成时间，λ=1.867×10^-11 a^-1.

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表 4 图古日格角闪石岩主量元素(%)、微量元素(10^-6)和稀土元素(10^-6)分析结果

Table 4. Major elements, trace elements and rare elements analyses of the Tugurige hornblendite

样品	1##-1	1##-2	1##-3	1##-4	1##-5	1##-6
SiO₂	43.46	43.54	45.30	45.29	46.30	43.33
Al₂O₃	16.15	17.57	15.84	11.02	10.87	15.52
TFe₂O₃	14.22	14.01	13.91	13.99	13.34	15.14
MgO	7.59	6.26	7.43	11.89	11.73	7.93
CaO	9.34	9.44	9.90	11.35	11.10	10.25
Na₂O	2.10	2.29	2.43	1.88	1.86	2.20
K₂O	2.36	2.11	1.37	0.99	0.97	1.73
MnO	0.21	0.19	0.21	0.20	0.20	0.21
TiO₂	1.52	1.49	1.47	1.89	1.85	1.67
P₂O₅	0.44	0.50	0.39	0.05	0.05	0.36
LOI	2.56	2.54	1.72	1.42	1.67	1.62
Total	99.95	99.94	99.97	99.97	99.94	99.96
Mg^#	51.39	46.95	51.41	62.74	63.53	50.92
M/F	1.04	0.87	1.04	1.66	1.72	1.02
La	20.0	18.3	19.7	12.5	13.7	21.4
Ce	58.8	52.2	52.0	34.8	36.5	56.1
Pr	8.91	7.74	8.04	5.74	5.80	8.90
Nd	37.4	34.6	38.1	29.5	28.5	42.2
Sm	7.57	6.93	8.70	7.51	7.40	9.41
Eu	1.80	1.83	2.13	1.85	1.84	2.46
Gd	7.06	6.32	7.82	7.10	6.58	8.47
Tb	1.15	1.05	1.27	1.16	1.14	1.42
Dy	5.87	5.32	6.39	6.13	6.01	6.89
Ho	1.12	1.05	1.14	1.10	1.00	1.24
Er	3.27	3.11	3.13	2.93	2.69	3.50
Tm	0.51	0.47	0.47	0.44	0.41	0.53
Yb	2.87	2.82	2.67	2.47	2.34	3.09
Lu	0.45	0.42	0.39	0.35	0.34	0.45
REE	156.33	141.74	151.56	113.23	113.91	165.51
LREE	134.48	121.60	128.67	91.90	93.74	140.37
HREE	21.85	20.14	22.89	21.33	20.17	25.14
δEu	0.74	0.83	0.77	0.76	0.79	0.83
LREE/HREE	6.15	6.04	5.62	4.31	4.65	5.58
(La/Yb)_N	4.70	4.38	4.97	3.41	3.95	4.67
(La/Sm)_N	1.66	1.66	1.42	1.05	1.16	1.43
(Gd/Lu)_N	1.95	1.87	2.49	2.52	2.41	2.34
V	317	290	289	439	480	368
Cr	124.0	63.2	94.2	272.0	268.0	87.2
Co	37.8	30.7	38.5	56.0	53.9	46.1
Ni	21.3	18.8	15.8	35.3	35.1	15.9
Ga	33.0	33.3	23.6	17.6	17.2	24.8
Rb	93.5	105.0	37.4	20.2	16.5	55.3
Sr	576	882	569	295	249	573
Y	35.2	32.1	31.1	29.1	27.8	34.3
Ba	303	540	710	1105	239	497
Pb	9.64	13.00	6.14	4.47	4.70	6.64
Th	2.54	2.89	2.23	1.50	3.01	2.41
U	0.72	0.91	0.86	0.45	0.97	0.89
Nb	6.55	6.27	6.03	5.34	5.49	6.74
Ta	0.284	0.266	0.320	0.325	0.365	0.320
Zr	116.0	152.0	96.2	60.1	67.0	115.0
Hf	3.64	4.20	3.49	2.67	2.93	3.89
La/Sm	2.64	2.64	2.26	1.66	1.85	2.27
Sr/Nd	15.40	25.49	14.93	10.00	8.74	13.58

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