Genesis of Amphibolite of Sidaolazihe Formation in Fusong Area,Jilin Province

Abstract

Abstract:

The formation age and genetic mechanism of the set of metamorphic rocks of Archean amphibolite facies, outcropped in Fusong area of Jilin Province, is a long-existed and unresolved problem. This paper selected the amphibolite from the metamorphic rocks as the studying object, and analyzed the forming process and discussed the evolution background of the contemporaneous tectonomagmatism by systematically studying petrology, mineralogy, petrogeochemistry and zircon U-Pb chronology characteristics. LA-ICP-MS U-Pb zircon dating of magmatic zircons yields the ages of (2,555±13) Ma, (2,528±13)Ma and (2,529±9.8) Ma, which indicates that the formation age of the magma belongs to Late Neoarchean (2.55-2.50 Ga). The average contents of the major elements are similar to those of basalt; the contents of SiO₂ are ranging from 46.22% to 59.6%with the average of 51.13%; while contents of Al₂O₃ are from 11.83% to 17.59% with the average of 13.42%.The total REE content are ranging from 53.74×10^-6 to 219.07×10^-6,and the average is 108.17×10^-6. The ratios of (La/Yb)_N range from 2.07 to 8.98 with the average of 5.19,which indicates that the light rare earth elements (LREE) are relative enrichment and the light-heavy REEs are obviously fractionated. The contents of trace elements in the amphibolite are characterized by relative enrichment in large ion lithophile elements (LILE), i.e.K, Rb and Ba, and by depletion in high field-strength elements (HFSE), i.e., Zr, Ti, Nd and Ta. The primary rock of this set of metamorphic rock association is regarded as basaltic volcanic by comprehensively studying their mineral composition and geochemical component, thus the metamorphic rocks belong to orthometamorphite. The magma, formed in the island-arc environment, is mainly derived from depleted mantle and simultaneously accompanied by the contamination and reconstruction of a small quantity of old crust. This study area was considered to be the northern extension part of Neoarchean Jilin-Liaoning-Hebei arc-continent collisional accretion-type orogenic belt of North China Craton.

Key words: Neo-Archean, amphibolite, Sidaolazihe Formation, Jilin

CLC Number:

TONG Zhiqiang, ZHENG Changqing, CUI Xuewen, GUO Wenke, TIAN Jiandong. Genesis of Amphibolite of Sidaolazihe Formation in Fusong Area,Jilin Province[J]. Geoscience, 2017, 31(06): 1187-1200.

Figures/Tables 12

Fig.1 The distribution map of Archean rocks in the northeast of the North China Craton (a)modified after LI et al.[5]) and schematic diagram of the study area(b)

Fig.2 Macrographs and micrographs of amphibolites

Table 1 The test sample number and sampling location

样品编号		岩性	构造	所在剖面位置	经纬度坐标
U-Pb01	GXW01	斜长角闪岩	块状构造	PM01	127°00'39″E;42°01'03″N;H=817
U-Pb01	GXW02	斜长角闪岩		PM01	127°00'41″E;42°00'54″N;H=823
U-Pb02	GXW03	斜长角闪岩		PM02	127°06'08″E;42°00'20″N;H=919
U-Pb02	GXW04	斜长角闪岩		PM02	127°06'07″E;42°00'21″N;H=921
U-Pb03	GXW05	斜长角闪岩	片麻状构造	PM17	127°33'24″E;42°05'35″N;H=888
U-Pb03	GXW06	斜长角闪岩	片麻状构造	PM17	127°33'24″E;42°05'33″N;H=885

Fig.3 CL images of zircons

Table 2 LA-ICP-MS zircon U-Pb data of amphibolites

测点号	含量/10^-6		$T h U$	同位素比值							年龄/Ma
测点号	Th	U	$T h U$	$? 207 P b ? 206 P b$	1σ	$? 207 P b ? 235 U$	1σ	$? 206 P b ? 238 U$	1σ		$? 207 P b ? 206 P b$	1σ	$? 207 P b ? 235 U$	1σ	$? 206 P b ? 238 U$	1σ
U-Pb01-01	388.0	414	0.94	0.173 4	0.001 0	11.243 9	0.124 9	0.468 1	0.004 5	2 591		14	2 544	10	2 475	20
U-Pb01-02	392.0	426	0.92	0.170 0	0.001 0	10.562 7	0.121 8	0.449 2	0.004 8	2 557		11	2 485	11	2 392	22
U-Pb01-03	179.0	343	0.52	0.167 6	0.001 3	11.434 0	0.117 4	0.493 4	0.004 5	2 600		14	2 559	10	2 586	20
U-Pb01-04	83.0	175	0.47	0.170 3	0.001 5	11.539 7	0.154 2	0.490 0	0.005 9	2 561		15	2 568	12	2 571	25
U-Pb01-05	216.0	251	0.86	0.165 2	0.001 3	10.688 3	0.153 1	0.468 8	0.007 3	2 510		13	2 496	13	2 478	32
U-Pb01-06	312.0	407	0.77	0.166 4	0.001 1	10.886 3	0.096 2	0.473 6	0.003 5	2 521		10	2 513	8	2 499	15
U-Pb01-07	320.0	543	0.59	0.168 8	0.001 3	9.374 7	0.133 7	0.402 6	0.006 4	2 545		13	2 375	13	2 181	29
U-Pb01-08	314.0	386	0.81	0.168 8	0.001 0	10.184 2	0.098 7	0.436 4	0.003 5	2 546		15	2 452	9	2 334	16
U-Pb01-09	260.0	333	0.78	0.174 0	0.001 0	11.424 1	0.132 9	0.473 7	0.004 6	2 596		10	2 558	11	2 500	20
U-Pb01-10	372.0	450	0.83	0.168 5	0.001 3	10.168 6	0.121 7	0.436 9	0.004 5	2 542		19	2 450	11	2 337	20
U-Pb01-11	391.0	452	0.87	0.173 5	0.001 1	10.816 0	0.165 0	0.450 2	0.005 6	2 592		11	2 507	14	2 396	25
U-Pb01-12	292.0	386	0.76	0.173 5	0.001 0	11.486 8	0.124 9	0.479 6	0.004 6	2 592		9	2 564	10	2 525	20
U-Pb01-13	129.0	292	0.44	0.166 6	0.001 0	10.734 7	0.111 8	0.466 6	0.004 5	2 523		44	2 500	10	2 469	20
U-Pb01-14	89.4	389	0.23	0.171 0	0.000 9	11.073 4	0.112 9	0.468 7	0.004 5	2 569		9	2 529	9	2 478	20
U-Pb01-15	157.0	372	0.42	0.169 2	0.000 9	10.910 5	0.128 6	0.466 4	0.005 1	2 549		9	2 516	11	2 468	22
U-Pb01-16	300.0	618	0.49	0.163 3	0.002 1	8.703 6	0.196 2	0.383 6	0.005 3	2 490		22	2 307	21	2 093	25
U-Pb01-17	75.7	134	0.57	0.160 2	0.001 1	9.613 6	0.105 8	0.432 9	0.003 8	2 458		11	2 398	10	2 319	17
U-Pb01-18	144.0	423	0.34	0.188 1	0.001 1	13.115 5	0.132 7	0.503 7	0.004 6	2 726		9	2 688	10	2 630	20
U-Pb01-19	243.0	361	0.67	0.163 6	0.001 0	9.980 6	0.135 7	0.440 6	0.005 5	2 494		10	2 433	13	2 353	25
U-Pb01-20	480.0	624	0.77	0.169 9	0.000 9	11.093 2	0.118 7	0.471 2	0.004 2	2 557		8	2 531	10	2 489	19
U-Pb01-21	639.0	118	0.54	0.141 0	0.001 0	3.739 2	0.042 6	0.191 1	0.001 4	2 240		13	1 580	9	1 128	8
U-Pb01-22	102.0	421	0.24	0.170 0	0.000 9	10.563 2	0.105 5	0.448 1	0.003 5	2 558		9	2 485	9	2 387	16
U-Pb01-23	144.0	381	0.38	0.167 9	0.001 1	10.426 3	0.096 8	0.448 4	0.003 2	2 536		11	2 473	9	2 388	14
U-Pb01-24	78.1	282	0.28	0.169 0	0.001 4	12.381 0	0.141 6	0.528 8	0.005 4	2 548		14	2 634	11	2 737	23
U-Pb01-25	91.6	273	0.34	0.166 8	0.001 2	10.633 8	0.146 9	0.460 1	0.006 0	2 526		13	2 492	13	2 440	26
U-Pb02-01	50.7	93	0.55	0.168 0	0.001 2	11.394 3	0.135 9	0.490 7	0.005 7	2 538		12	2 556	11	2 574	25
U-Pb02-02	145.0	177	0.82	0.053 9	0.001 9	0.302 6	0.010 0	0.040 8	0.000 6	365		80	268	8	258	3
U-Pb02-03	68.6	94	0.73	0.169 3	0.001 8	10.133 0	0.157 5	0.431 9	0.005 4	2 551		18	2 447	14	2 314	24
U-Pb02-04	54.1	77	0.70	0.169 3	0.001 2	10.818 2	0.122 7	0.461 3	0.004 4	2 550		12	2 508	11	2 445	19
U-Pb02-05	40.5	97	0.42	0.165 6	0.001 1	12.468 1	0.166 3	0.543 4	0.006 5	2 514		11	2 640	13	2 797	27
U-Pb02-06	62.0	87	0.71	0.160 9	0.001 6	10.211 4	0.154 0	0.457 3	0.005 2	2 465		17	2 454	14	2 428	23
U-Pb02-07	43.3	93	0.47	0.169 7	0.002 1	10.326 8	0.163 7	0.440 4	0.006 9	2 554		21	2 465	15	2 353	31
U-Pb02-08	59.1	70	0.85	0.164 8	0.001 3	10.655 8	0.138 9	0.466 8	0.005 2	2 506		14	2 494	12	2 470	23
U-Pb02-09	55.2	88	0.63	0.166 2	0.001 7	11.961 4	0.135 8	0.521 9	0.005 4	2 520		17	2 601	11	2 707	23
U-Pb02-10	122.0	155	0.78	0.166 5	0.001 2	9.940 5	0.145 3	0.431 3	0.005 9	2 524		6	2 429	13	2 312	27
U-Pb02-11	39.3	71	0.55	0.171 0	0.001 2	11.665 8	0.145 6	0.493 4	0.005 1	2 569		12	2 578	12	2 586	22
U-Pb02-12	47.7	73	0.66	0.160 8	0.001 8	8.681 8	0.154 7	0.391 3	0.006 7	2 465		14	2 305	16	2 129	31
U-Pb02-13	115.0	153	0.75	0.166 0	0.001 1	10.873 1	0.120 9	0.474 2	0.004 9	2 518		11	2 512	10	2 502	21
U-Pb02-14	115.0	296	0.39	0.156 6	0.001 1	9.675 6	0.171 6	0.445 9	0.006 5	2 420		11	2 404	16	2 377	29
U-Pb02-15	108.0	154	0.70	0.146 1	0.001 4	7.240 0	0.183 8	0.357 0	0.007 0	2 302		16	2 141	23	1 968	33
U-Pb02-16	48.0	70	0.68	0.166 2	0.001 3	10.598 4	0.104 7	0.463 6	0.004 2	2 520		14	2 489	9	2 455	18
U-Pb02-17	39.1	115	0.34	0.162 5	0.001 0	11.890 5	0.129 8	0.531 4	0.005 5	2 483		10	2 596	10	2 747	23
U-Pb02-18	102.0	241	0.42	0.165 2	0.000 9	11.803 3	0.152 3	0.517 7	0.005 9	2 510		9	2 589	12	2 689	25
U-Pb02-19	111.0	151	0.74	0.171 3	0.001 2	11.059 1	0.124 3	0.468 3	0.004 6	2 570		13	2 528	10	2 476	20
U-Pb02-20	242.0	231	1.05	0.169 5	0.001 0	10.164 9	0.123 8	0.435 1	0.005 3	2 554		10	2 450	11	2 329	24
U-Pb02-21	31.3	50	0.63	0.173 9	0.001 4	11.737 6	0.150 1	0.489 2	0.005 1	2 596		13	2 584	12	2 567	22
U-Pb02-22	161.0	152	1.06	0.171 2	0.001 1	11.425 0	0.098 7	0.483 7	0.003 4	2 569		10	2 558	8	2 543	15
U-Pb02-23	95.7	160	0.60	0.170 6	0.001 6	11.064 0	0.133 7	0.470 3	0.006 1	2 565		16	2 529	11	2 485	27
U-Pb02-24	68.5	115	0.59	0.164 9	0.001 2	10.973 8	0.117 8	0.483 3	0.005 5	2 507		13	2 521	10	2 541	24
U-Pb02-25	37.6	52	0.72	0.168 5	0.001 4	11.301 6	0.116 9	0.487 0	0.005 2	2 542		15	2 548	10	2 558	22
U-Pb03-01	22.7	40	0.57	0.168 5	0.001 5	11.406 9	0.141 9	0.490 0	0.004 6	2 542		15	2 557	12	2 571	20
U-Pb03-02	16.2	25	0.66	0.168 8	0.002 0	11.405 7	0.163 1	0.488 9	0.004 6	2 546		19	2 557	13	2 566	20
U-Pb03-03	15.1	33	0.46	0.171 4	0.001 8	11.534 0	0.164 6	0.486 6	0.005 1	2 571		17	2 567	13	2 556	22
U-Pb03-04	15.8	46	0.35	0.156 6	0.001 5	8.984 6	0.134 6	0.415 2	0.005 1	2 420		17	2 336	14	2 238	23
U-Pb03-05	16.9	26	0.65	0.166 7	0.001 8	11.167 1	0.166 6	0.484 3	0.004 9	2 524		18	2 537	14	2 546	21
U-Pb03-06	20.4	40	0.51	0.166 4	0.002 2	9.099 8	0.287 1	0.395 0	0.011 4	2 522		23	2 348	29	2 146	53
U-Pb03-07	11.4	22	0.51	0.168 5	0.002 3	10.785 4	0.164 8	0.464 2	0.004 7	2 543		23	2 505	14	2 458	21
U-Pb03-08	34.6	89	0.39	0.167 4	0.001 2	11.411 3	0.133 8	0.493 1	0.004 9	2 532		12	2 557	11	2 584	21
U-Pb03-09	17.0	36	0.47	0.167 4	0.001 6	11.788 6	0.167 7	0.510 2	0.006 2	2 532		16	2 588	13	2 658	26
U-Pb03-10	189.0	266	0.71	0.162 9	0.000 9	10.291 7	0.149 8	0.456 4	0.005 6	2 487		9	2 461	13	2 423	25
U-Pb03-11	18.9	41	0.46	0.164 9	0.001 6	11.071 1	0.184 8	0.487 3	0.007 6	2 506		12	2 529	16	2 559	33
U-Pb03-12	19.3	38	0.50	0.167 5	0.001 6	11.243 7	0.169 0	0.485 2	0.005 2	2 533		16	2 544	14	2 550	23
U-Pb03-13	87.9	133	0.66	0.167 3	0.001 2	11.112 6	0.130 1	0.480 9	0.004 8	2 531		11	2 533	11	2 531	21
U-Pb03-14	11.6	30	0.38	0.168 4	0.001 6	11.453 3	0.170 4	0.491 7	0.005 3	2 542		15	2 561	14	2 578	23
U-Pb03-15	14.2	31	0.46	0.169 0	0.001 8	11.367 1	0.167 3	0.487 2	0.004 8	2 547		17	2 554	14	2 558	21
U-Pb03-16	17.1	47	0.37	0.166 2	0.001 6	10.478 0	0.144 4	0.457 1	0.005 2	2 520		16	2 478	13	2 427	23
U-Pb03-17	199.0	399	0.50	0.169 1	0.000 9	10.305 8	0.116 4	0.441 2	0.004 8	2 550		9	2 463	10	2 356	21
U-Pb03-18	38.3	152	0.25	0.155 2	0.001 6	9.285 3	0.190 7	0.431 3	0.007 2	2 406		18	2 367	19	2 312	32
U-Pb03-19	305.0	681	0.45	0.151 7	0.001 5	6.073 1	0.093 8	0.289 2	0.003 5	2 365		18	1 986	13	1 637	18
U-Pb03-20	9.88	28	0.35	0.169 9	0.002 1	11.255 8	0.188 3	0.480 4	0.006 3	2 557		21	2 545	16	2 529	28
U-Pb03-21	75.8	101	0.75	0.168 0	0.001 2	12.045 2	0.169 0	0.518 4	0.006 2	2 539		11	2 608	13	2 692	26
U-Pb03-22	391.0	699	0.56	0.157 8	0.001 7	8.139 7	0.141 6	0.373 1	0.005 9	2 432		19	2 247	16	2 044	27
U-Pb03-23	49.7	108	0.46	0.164 6	0.001 2	11.653 6	0.155 0	0.512 1	0.004 8	2 503		13	2 577	12	2 666	21
U-Pb03-24	39.3	66	0.59	0.166 6	0.001 4	10.245 6	0.207 3	0.443 9	0.006 3	2 524		15	2 457	19	2 368	28
U-Pb03-25	25.1	48	0.53	0.168 9	0.002 5	11.228 6	0.242 1	0.481 3	0.006 0	2 547		25	2 542	20	2 533	26

Table 2 LA-ICP-MS zircon U-Pb data of amphibolites

测点号	含量/10^-6		$T h U$	同位素比值							年龄/Ma
测点号	Th	U	$T h U$	$? 207 P b ? 206 P b$	1σ	$? 207 P b ? 235 U$	1σ	$? 206 P b ? 238 U$	1σ		$? 207 P b ? 206 P b$	1σ	$? 207 P b ? 235 U$	1σ	$? 206 P b ? 238 U$	1σ
U-Pb01-01	388.0	414	0.94	0.173 4	0.001 0	11.243 9	0.124 9	0.468 1	0.004 5	2 591		14	2 544	10	2 475	20
U-Pb01-02	392.0	426	0.92	0.170 0	0.001 0	10.562 7	0.121 8	0.449 2	0.004 8	2 557		11	2 485	11	2 392	22
U-Pb01-03	179.0	343	0.52	0.167 6	0.001 3	11.434 0	0.117 4	0.493 4	0.004 5	2 600		14	2 559	10	2 586	20
U-Pb01-04	83.0	175	0.47	0.170 3	0.001 5	11.539 7	0.154 2	0.490 0	0.005 9	2 561		15	2 568	12	2 571	25
U-Pb01-05	216.0	251	0.86	0.165 2	0.001 3	10.688 3	0.153 1	0.468 8	0.007 3	2 510		13	2 496	13	2 478	32
U-Pb01-06	312.0	407	0.77	0.166 4	0.001 1	10.886 3	0.096 2	0.473 6	0.003 5	2 521		10	2 513	8	2 499	15
U-Pb01-07	320.0	543	0.59	0.168 8	0.001 3	9.374 7	0.133 7	0.402 6	0.006 4	2 545		13	2 375	13	2 181	29
U-Pb01-08	314.0	386	0.81	0.168 8	0.001 0	10.184 2	0.098 7	0.436 4	0.003 5	2 546		15	2 452	9	2 334	16
U-Pb01-09	260.0	333	0.78	0.174 0	0.001 0	11.424 1	0.132 9	0.473 7	0.004 6	2 596		10	2 558	11	2 500	20
U-Pb01-10	372.0	450	0.83	0.168 5	0.001 3	10.168 6	0.121 7	0.436 9	0.004 5	2 542		19	2 450	11	2 337	20
U-Pb01-11	391.0	452	0.87	0.173 5	0.001 1	10.816 0	0.165 0	0.450 2	0.005 6	2 592		11	2 507	14	2 396	25
U-Pb01-12	292.0	386	0.76	0.173 5	0.001 0	11.486 8	0.124 9	0.479 6	0.004 6	2 592		9	2 564	10	2 525	20
U-Pb01-13	129.0	292	0.44	0.166 6	0.001 0	10.734 7	0.111 8	0.466 6	0.004 5	2 523		44	2 500	10	2 469	20
U-Pb01-14	89.4	389	0.23	0.171 0	0.000 9	11.073 4	0.112 9	0.468 7	0.004 5	2 569		9	2 529	9	2 478	20
U-Pb01-15	157.0	372	0.42	0.169 2	0.000 9	10.910 5	0.128 6	0.466 4	0.005 1	2 549		9	2 516	11	2 468	22
U-Pb01-16	300.0	618	0.49	0.163 3	0.002 1	8.703 6	0.196 2	0.383 6	0.005 3	2 490		22	2 307	21	2 093	25
U-Pb01-17	75.7	134	0.57	0.160 2	0.001 1	9.613 6	0.105 8	0.432 9	0.003 8	2 458		11	2 398	10	2 319	17
U-Pb01-18	144.0	423	0.34	0.188 1	0.001 1	13.115 5	0.132 7	0.503 7	0.004 6	2 726		9	2 688	10	2 630	20
U-Pb01-19	243.0	361	0.67	0.163 6	0.001 0	9.980 6	0.135 7	0.440 6	0.005 5	2 494		10	2 433	13	2 353	25
U-Pb01-20	480.0	624	0.77	0.169 9	0.000 9	11.093 2	0.118 7	0.471 2	0.004 2	2 557		8	2 531	10	2 489	19
U-Pb01-21	639.0	118	0.54	0.141 0	0.001 0	3.739 2	0.042 6	0.191 1	0.001 4	2 240		13	1 580	9	1 128	8
U-Pb01-22	102.0	421	0.24	0.170 0	0.000 9	10.563 2	0.105 5	0.448 1	0.003 5	2 558		9	2 485	9	2 387	16
U-Pb01-23	144.0	381	0.38	0.167 9	0.001 1	10.426 3	0.096 8	0.448 4	0.003 2	2 536		11	2 473	9	2 388	14
U-Pb01-24	78.1	282	0.28	0.169 0	0.001 4	12.381 0	0.141 6	0.528 8	0.005 4	2 548		14	2 634	11	2 737	23
U-Pb01-25	91.6	273	0.34	0.166 8	0.001 2	10.633 8	0.146 9	0.460 1	0.006 0	2 526		13	2 492	13	2 440	26
U-Pb02-01	50.7	93	0.55	0.168 0	0.001 2	11.394 3	0.135 9	0.490 7	0.005 7	2 538		12	2 556	11	2 574	25
U-Pb02-02	145.0	177	0.82	0.053 9	0.001 9	0.302 6	0.010 0	0.040 8	0.000 6	365		80	268	8	258	3
U-Pb02-03	68.6	94	0.73	0.169 3	0.001 8	10.133 0	0.157 5	0.431 9	0.005 4	2 551		18	2 447	14	2 314	24
U-Pb02-04	54.1	77	0.70	0.169 3	0.001 2	10.818 2	0.122 7	0.461 3	0.004 4	2 550		12	2 508	11	2 445	19
U-Pb02-05	40.5	97	0.42	0.165 6	0.001 1	12.468 1	0.166 3	0.543 4	0.006 5	2 514		11	2 640	13	2 797	27
U-Pb02-06	62.0	87	0.71	0.160 9	0.001 6	10.211 4	0.154 0	0.457 3	0.005 2	2 465		17	2 454	14	2 428	23
U-Pb02-07	43.3	93	0.47	0.169 7	0.002 1	10.326 8	0.163 7	0.440 4	0.006 9	2 554		21	2 465	15	2 353	31
U-Pb02-08	59.1	70	0.85	0.164 8	0.001 3	10.655 8	0.138 9	0.466 8	0.005 2	2 506		14	2 494	12	2 470	23
U-Pb02-09	55.2	88	0.63	0.166 2	0.001 7	11.961 4	0.135 8	0.521 9	0.005 4	2 520		17	2 601	11	2 707	23
U-Pb02-10	122.0	155	0.78	0.166 5	0.001 2	9.940 5	0.145 3	0.431 3	0.005 9	2 524		6	2 429	13	2 312	27
U-Pb02-11	39.3	71	0.55	0.171 0	0.001 2	11.665 8	0.145 6	0.493 4	0.005 1	2 569		12	2 578	12	2 586	22
U-Pb02-12	47.7	73	0.66	0.160 8	0.001 8	8.681 8	0.154 7	0.391 3	0.006 7	2 465		14	2 305	16	2 129	31
U-Pb02-13	115.0	153	0.75	0.166 0	0.001 1	10.873 1	0.120 9	0.474 2	0.004 9	2 518		11	2 512	10	2 502	21
U-Pb02-14	115.0	296	0.39	0.156 6	0.001 1	9.675 6	0.171 6	0.445 9	0.006 5	2 420		11	2 404	16	2 377	29
U-Pb02-15	108.0	154	0.70	0.146 1	0.001 4	7.240 0	0.183 8	0.357 0	0.007 0	2 302		16	2 141	23	1 968	33
U-Pb02-16	48.0	70	0.68	0.166 2	0.001 3	10.598 4	0.104 7	0.463 6	0.004 2	2 520		14	2 489	9	2 455	18
U-Pb02-17	39.1	115	0.34	0.162 5	0.001 0	11.890 5	0.129 8	0.531 4	0.005 5	2 483		10	2 596	10	2 747	23
U-Pb02-18	102.0	241	0.42	0.165 2	0.000 9	11.803 3	0.152 3	0.517 7	0.005 9	2 510		9	2 589	12	2 689	25
U-Pb02-19	111.0	151	0.74	0.171 3	0.001 2	11.059 1	0.124 3	0.468 3	0.004 6	2 570		13	2 528	10	2 476	20
U-Pb02-20	242.0	231	1.05	0.169 5	0.001 0	10.164 9	0.123 8	0.435 1	0.005 3	2 554		10	2 450	11	2 329	24
U-Pb02-21	31.3	50	0.63	0.173 9	0.001 4	11.737 6	0.150 1	0.489 2	0.005 1	2 596		13	2 584	12	2 567	22
U-Pb02-22	161.0	152	1.06	0.171 2	0.001 1	11.425 0	0.098 7	0.483 7	0.003 4	2 569		10	2 558	8	2 543	15
U-Pb02-23	95.7	160	0.60	0.170 6	0.001 6	11.064 0	0.133 7	0.470 3	0.006 1	2 565		16	2 529	11	2 485	27
U-Pb02-24	68.5	115	0.59	0.164 9	0.001 2	10.973 8	0.117 8	0.483 3	0.005 5	2 507		13	2 521	10	2 541	24
U-Pb02-25	37.6	52	0.72	0.168 5	0.001 4	11.301 6	0.116 9	0.487 0	0.005 2	2 542		15	2 548	10	2 558	22
U-Pb03-01	22.7	40	0.57	0.168 5	0.001 5	11.406 9	0.141 9	0.490 0	0.004 6	2 542		15	2 557	12	2 571	20
U-Pb03-02	16.2	25	0.66	0.168 8	0.002 0	11.405 7	0.163 1	0.488 9	0.004 6	2 546		19	2 557	13	2 566	20
U-Pb03-03	15.1	33	0.46	0.171 4	0.001 8	11.534 0	0.164 6	0.486 6	0.005 1	2 571		17	2 567	13	2 556	22
U-Pb03-04	15.8	46	0.35	0.156 6	0.001 5	8.984 6	0.134 6	0.415 2	0.005 1	2 420		17	2 336	14	2 238	23
U-Pb03-05	16.9	26	0.65	0.166 7	0.001 8	11.167 1	0.166 6	0.484 3	0.004 9	2 524		18	2 537	14	2 546	21
U-Pb03-06	20.4	40	0.51	0.166 4	0.002 2	9.099 8	0.287 1	0.395 0	0.011 4	2 522		23	2 348	29	2 146	53
U-Pb03-07	11.4	22	0.51	0.168 5	0.002 3	10.785 4	0.164 8	0.464 2	0.004 7	2 543		23	2 505	14	2 458	21
U-Pb03-08	34.6	89	0.39	0.167 4	0.001 2	11.411 3	0.133 8	0.493 1	0.004 9	2 532		12	2 557	11	2 584	21
U-Pb03-09	17.0	36	0.47	0.167 4	0.001 6	11.788 6	0.167 7	0.510 2	0.006 2	2 532		16	2 588	13	2 658	26
U-Pb03-10	189.0	266	0.71	0.162 9	0.000 9	10.291 7	0.149 8	0.456 4	0.005 6	2 487		9	2 461	13	2 423	25
U-Pb03-11	18.9	41	0.46	0.164 9	0.001 6	11.071 1	0.184 8	0.487 3	0.007 6	2 506		12	2 529	16	2 559	33
U-Pb03-12	19.3	38	0.50	0.167 5	0.001 6	11.243 7	0.169 0	0.485 2	0.005 2	2 533		16	2 544	14	2 550	23
U-Pb03-13	87.9	133	0.66	0.167 3	0.001 2	11.112 6	0.130 1	0.480 9	0.004 8	2 531		11	2 533	11	2 531	21
U-Pb03-14	11.6	30	0.38	0.168 4	0.001 6	11.453 3	0.170 4	0.491 7	0.005 3	2 542		15	2 561	14	2 578	23
U-Pb03-15	14.2	31	0.46	0.169 0	0.001 8	11.367 1	0.167 3	0.487 2	0.004 8	2 547		17	2 554	14	2 558	21
U-Pb03-16	17.1	47	0.37	0.166 2	0.001 6	10.478 0	0.144 4	0.457 1	0.005 2	2 520		16	2 478	13	2 427	23
U-Pb03-17	199.0	399	0.50	0.169 1	0.000 9	10.305 8	0.116 4	0.441 2	0.004 8	2 550		9	2 463	10	2 356	21
U-Pb03-18	38.3	152	0.25	0.155 2	0.001 6	9.285 3	0.190 7	0.431 3	0.007 2	2 406		18	2 367	19	2 312	32
U-Pb03-19	305.0	681	0.45	0.151 7	0.001 5	6.073 1	0.093 8	0.289 2	0.003 5	2 365		18	1 986	13	1 637	18
U-Pb03-20	9.88	28	0.35	0.169 9	0.002 1	11.255 8	0.188 3	0.480 4	0.006 3	2 557		21	2 545	16	2 529	28
U-Pb03-21	75.8	101	0.75	0.168 0	0.001 2	12.045 2	0.169 0	0.518 4	0.006 2	2 539		11	2 608	13	2 692	26
U-Pb03-22	391.0	699	0.56	0.157 8	0.001 7	8.139 7	0.141 6	0.373 1	0.005 9	2 432		19	2 247	16	2 044	27
U-Pb03-23	49.7	108	0.46	0.164 6	0.001 2	11.653 6	0.155 0	0.512 1	0.004 8	2 503		13	2 577	12	2 666	21
U-Pb03-24	39.3	66	0.59	0.166 6	0.001 4	10.245 6	0.207 3	0.443 9	0.006 3	2 524		15	2 457	19	2 368	28
U-Pb03-25	25.1	48	0.53	0.168 9	0.002 5	11.228 6	0.242 1	0.481 3	0.006 0	2 547		25	2 542	20	2 533	26

Fig.4 U-Pb concordia diagrams of zircon samples

Table 3 Major(%),REE and trace elements (10-6) of amphibolites

样品编号	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	FeO	MnO	MgO		CaO		Na₂O		K₂O	P₂O₅		烧失量	总量
GXW01	46.22	1.37	11.99	6.24	8.72	0.21	10.94		8.96		1.45		1.23	0.12		3.16	100.61
GXW02	53.61	2.16	13.28	11.48	5.10	0.15	3.29		2.47		3.02		1.42	0.40		4.59	100.97
GXW03	49.07	1.25	11.84	5.46	6.71	0.19	10.44		8.96		2.09		1.65	0.11		2.59	100.36
GXW04	47.99	1.57	17.59	5.48	5.58	0.15	5.57		7.49		3.30		1.73	0.29		3.62	100.36
GXW05	59.60	0.40	11.83	3.37	4.37	0.14	5.51		6.22		3.51		1.26	0.08		3.89	100.18
GXW06	50.32	0.57	14.01	5.82	6.96	0.17	8.56		4.98		2.79		1.10	0.07		5.15	100.49
样品编号	A/CNK	Mg^#	La	Ce	Pr	Nd	Sm		Eu		Gd		Tb	Dy		Ho	Er
GXW01	0.599	49.18	20.4	24.3	5.62	23.0	5.64		1.85		5.32		0.96	4.94		1.00	2.57
GXW02	1.208	33.22	45.3	77.7	11.00	45.8	9.95		2.95		8.68		1.47	6.96		1.36	3.47
GXW03	0.550	54.54	16.1	27.3	4.33	18.3	4.39		1.32		3.87		0.69	3.36		0.70	1.70
GXW04	0.841	43.50	30.6	59.4	7.73	31.1	7.07		2.23		6.29		1.09	5.52		1.18	3.10
GXW05	0.641	49.30	10.7	29.9	4.67	21.4	5.72		1.13		4.85		0.93	5.23		1.08	3.04
GXW06	0.944	48.68	7.46	17.4	2.55	10.8	2.81		0.94		2.54		0.53	3.11		0.69	1.88
样品编号	Tm	Yb	Lu	δEu	δCe	(La /Yb)_N		ΣREE		LREE		HREE			LREE /HREE		Cs
GXW01	0.42	2.65	0.35	1.02	0.53	5.20		99.03		80.81		18.22			4.44		0.54
GXW02	0.56	3.41	0.46	0.95	0.80	8.98		219.07		192.70		26.37			7.31		0.78
GXW03	0.27	1.66	0.24	0.96	0.76	6.55		84.23		71.74		12.49			5.74		0.75
GXW04	0.54	3.33	0.50	1.00	0.89	6.21		159.68		138.13		21.55			6.41		0.73
GXW05	0.54	3.49	0.50	0.64	0.99	2.07		93.18		73.52		19.66			3.74		1.64
GXW06	0.34	2.35	0.33	1.05	0.93	2.15		53.74		41.96		11.78			3.56		2.06
样品编号	Rb	Ba	Th	U	Zr	Hf	Sr		Y		Nb		Ta	Ga		Cr	V
GXW01	60.7	415	2.48	0.375	34.4	1.42	182		28.3		4.60		0.344	20.9		823	331
GXW02	54.5	689	3.59	0.481	27.9	1.40	312		36.6		11.70		0.735	26.3		7	348
GXW03	52.3	427	2.33	0.382	13.5	0.75	274		17.8		7.30		0.446	17.6		716	250
GXW04	47.2	557	6.98	1.620	201.0	5.57	775		31.2		11.90		0.807	21.2		18	272
GXW05	46.7	186	7.93	2.480	28.9	1.56	235		31.1		9.64		1.150	18.4		214	166
GXW06	53.0	302	1.63	1.620	19.0	0.87	249		20.4		5.71		0.703	18.8		127	211

Table 3 Major(%),REE and trace elements (10-6) of amphibolites

样品编号	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	FeO	MnO	MgO		CaO		Na₂O		K₂O	P₂O₅		烧失量	总量
GXW01	46.22	1.37	11.99	6.24	8.72	0.21	10.94		8.96		1.45		1.23	0.12		3.16	100.61
GXW02	53.61	2.16	13.28	11.48	5.10	0.15	3.29		2.47		3.02		1.42	0.40		4.59	100.97
GXW03	49.07	1.25	11.84	5.46	6.71	0.19	10.44		8.96		2.09		1.65	0.11		2.59	100.36
GXW04	47.99	1.57	17.59	5.48	5.58	0.15	5.57		7.49		3.30		1.73	0.29		3.62	100.36
GXW05	59.60	0.40	11.83	3.37	4.37	0.14	5.51		6.22		3.51		1.26	0.08		3.89	100.18
GXW06	50.32	0.57	14.01	5.82	6.96	0.17	8.56		4.98		2.79		1.10	0.07		5.15	100.49
样品编号	A/CNK	Mg^#	La	Ce	Pr	Nd	Sm		Eu		Gd		Tb	Dy		Ho	Er
GXW01	0.599	49.18	20.4	24.3	5.62	23.0	5.64		1.85		5.32		0.96	4.94		1.00	2.57
GXW02	1.208	33.22	45.3	77.7	11.00	45.8	9.95		2.95		8.68		1.47	6.96		1.36	3.47
GXW03	0.550	54.54	16.1	27.3	4.33	18.3	4.39		1.32		3.87		0.69	3.36		0.70	1.70
GXW04	0.841	43.50	30.6	59.4	7.73	31.1	7.07		2.23		6.29		1.09	5.52		1.18	3.10
GXW05	0.641	49.30	10.7	29.9	4.67	21.4	5.72		1.13		4.85		0.93	5.23		1.08	3.04
GXW06	0.944	48.68	7.46	17.4	2.55	10.8	2.81		0.94		2.54		0.53	3.11		0.69	1.88
样品编号	Tm	Yb	Lu	δEu	δCe	(La /Yb)_N		ΣREE		LREE		HREE			LREE /HREE		Cs
GXW01	0.42	2.65	0.35	1.02	0.53	5.20		99.03		80.81		18.22			4.44		0.54
GXW02	0.56	3.41	0.46	0.95	0.80	8.98		219.07		192.70		26.37			7.31		0.78
GXW03	0.27	1.66	0.24	0.96	0.76	6.55		84.23		71.74		12.49			5.74		0.75
GXW04	0.54	3.33	0.50	1.00	0.89	6.21		159.68		138.13		21.55			6.41		0.73
GXW05	0.54	3.49	0.50	0.64	0.99	2.07		93.18		73.52		19.66			3.74		1.64
GXW06	0.34	2.35	0.33	1.05	0.93	2.15		53.74		41.96		11.78			3.56		2.06
样品编号	Rb	Ba	Th	U	Zr	Hf	Sr		Y		Nb		Ta	Ga		Cr	V
GXW01	60.7	415	2.48	0.375	34.4	1.42	182		28.3		4.60		0.344	20.9		823	331
GXW02	54.5	689	3.59	0.481	27.9	1.40	312		36.6		11.70		0.735	26.3		7	348
GXW03	52.3	427	2.33	0.382	13.5	0.75	274		17.8		7.30		0.446	17.6		716	250
GXW04	47.2	557	6.98	1.620	201.0	5.57	775		31.2		11.90		0.807	21.2		18	272
GXW05	46.7	186	7.93	2.480	28.9	1.56	235		31.1		9.64		1.150	18.4		214	166
GXW06	53.0	302	1.63	1.620	19.0	0.87	249		20.4		5.71		0.703	18.8		127	211

Fig.5 Chondrite-normalized REE patterns(a.normalization values after BOYNTON[18]) and primitive mantle-normalized trace element patterns(b.normalization vslues after SUN et al.[19])of amphibolites

Fig.6 Protolith reconstruction diagrams of amphibolites(a.base map after VAN et al.[19];b.base map after Wang Renming et al.[20];c.base map after SIMONEN[21])

Fig.7 P2O5-TiO2 and MgO/FeO*-Y relationship diagram of amphibolites(after OU YANG[36])

Fig.8 Tectonic discrimination diagrams of protoliths of amphibolites((a)base map after COWDIE[37];(b)base map after WOOD[41];(c)base map after PEARCE[42];(d)base map after CONDIE[43])

Table 4 Basalt classification screens and amphibolite parameters

样品	第一级划分											样品		第二级划分
	优先参数				其次参数									第二级划分
	Nb/La	Hf/Ta	La/Ta	Ti/Y	Ti/V	TiO₂/%		Ta/10^-6		Nb/10^-6				Hf/Th		Ce/Nb
WPB-MORB	>1	<5	≤15	≥350	>30	>1.25		>0.7		>12		WPB,T-EMORB		<8		≤2
ARCB-NMORB	≤1	≥5	>15	<350	≤30	≤1.25		≤0.7		≤12		NMORB		≥8		>2
GXW01	0.23	4.13	59.30	290.22	24.81	1.37		0.34		4.60		GXW01
GXW02	0.26	1.90	61.63	353.80	37.21	2.16		0.74		11.70		GXW02
GXW03	0.45	1.67	36.10	421.00	29.98	1.25		0.45		7.30		GXW03
GXW04	0.39	6.90	37.92	301.67	34.60	1.57		0.81		11.90		GXW04
GXW05	0.90	1.36	9.30	77.49	14.52	0.40		1.15		9.64		GXW05
GXW06	0.77	1.24	10.61	166.63	16.11	0.57		0.70		5.71		GXW06
样品	第三级划分				样品		第四级划分				样品		第五级划分
样品	Th/Yb	Th/Nb	Nb/La	Hf/Th	样品		Zr/Y		Ta/Yb		样品		Th/Yb		Ti/Zr		La/Ta
NMORB	≤0.1	≤0.07	>0.8	≥8	IAT-CAB		<3		≤0.1		IAT		≤0.3		≥85		>50
ARCB	>0.1	>0.07	≤0.8	<8	CABC		≥3		>0.1		CAB		>0.3		<85		≤50
GXW01	0.94	0.54	0.23	0.57	GXW01		1.22		0.13		GXW01		0.94		238.75		59.30
GXW02	1.05	0.31	0.26	0.39	GXW02		0.76		0.22		GXW02		1.05		464.13		61.63
GXW03	1.40	0.32	0.45	0.32	GXW03		0.76		0.27		GXW03		1.40		555.09		36.10
GXW04	2.10	0.59	0.39	0.80	GXW04		6.44		0.24		GXW04		2.10		46.83		37.92
GXW05	2.27	0.82	0.90	0.20	GXW05		0.93		0.33		GXW05		2.27		83.39		9.30
GXW06	0.69	0.29	0.77	0.54	GXW06		0.93		0.30		GXW06		0.69		178.90		10.61

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