赣西北九岭中北部晚侏罗世S型花岗岩成矿专属性分析

doi:10.11720/wtyht.2019.1463

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Abstract

The zircon U-Pb geochronology, petrogeochemistry, zircon and biotite mineral geochemistry of biotite monzogranite (-porphyry) in Shimenlou area of northwestern Jiangxi province have been studied. The LA-ICP-MS zircon U-Pb ²⁰⁶Pb/ ²³⁸U weighted average ages of zircons from the biotite monzogranite (-porphyry) are in the range of 145.6~148.4 Ma, suggesting late Late Jurassic. The rock is common low fractionation S-type granite. The magma properties are moderately reductive (the ratio of Fe₂O₃/FeO = 0.18~0.19, the ratio of Ce ⁴⁺/Ce ³⁺ =14~158, log₁₀(fO₂)_D=-22.4~-6.9, averaging -13.8 (> IW-3.6)), strong evolution (the ratio of K/Rb =153~206), low fractionation (the ratio of Rb/Sr =1.6~4.2) and low temperature (T(zircon)_Ti = 619~881℃, averaging 750℃). The magma was derived from the magma source enriched area of the upper crust, which was formed by remelting and regenerating of the Neoproterozoic granitoids derived from the early Mesoproterozoic crustal material (Shuangqiao Mountain Group). The rock has the metallogenic material, time and spatial specialization and metallogenic possibility of forming tungsten deposit.

Key words： S-type granites zircon U-Pb isotope dating magmatic oxygen fugacity metallogenic specialization northwestern Jiangxi Province

Received: 28 December 2018 Published: 25 October 2019

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	Sheng-Bing LIAO
	Ping-Li CHU
	Zheng DUAN
	Wen-Cheng HUANG
	Yan-Hui ZHU
	Xu-Jie SHU

Cite this article:

Sheng-Bing LIAO,Ping-Li CHU,Zheng DUAN, et al. Metallogenic specialization of late Jurassic S-type granites in middle-northern Jiuling Mountain in northwestern Jiangxi[J]. Geophysical and Geochemical Exploration, 2019, 43(5): 1003-1014.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2019.1463 OR https://www.wutanyuhuatan.com/EN/Y2019/V43/I5/1003

Tectonic position (a) and geological sketch(b) of the study area

分析点号	元素含量/10^-6		Th/U	同位素比值						同位素年龄/Ma
分析点号	Th	U	Th/U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²³⁵U	1σ		²⁰⁶Pb/²³⁸U		1σ		²⁰⁸Pb/²³²Th		1σ
南部中细粒黑云二长花岗岩(样品TW5787-1-5)
1*	129	883	0.15	0.0594	0.0014	0.5491	0.0167	0.0664	0.0013	444		11		414		8		323		16
2	101	1687	0.06	0.0465	0.0019	0.1481	0.0060	0.0229	0.0004	140		5		146		2		119		14
3	653	2712	0.24	0.0483	0.0011	0.1538	0.0037	0.0228	0.0002	145		3		145		2		181		7
4	698	2041	0.34	0.0520	0.0012	0.1660	0.0040	0.0228	0.0003	156		4		146		2		148		5
5*	66	173	0.38	0.0639	0.0022	1.2019	0.0402	0.1358	0.0024	801		19		821		14		834		35
6*	335	303	1.10	0.0500	0.0036	0.1832	0.0114	0.0275	0.0007	171		10		175		5		165		10
7	367	714	0.51	0.0492	0.0020	0.1570	0.0063	0.0229	0.0004	148		6		146		3		131		7
8	507	2186	0.23	0.0486	0.0014	0.1570	0.0047	0.0229	0.0003	148		4		146		2		145		6
9	378	1288	0.29	0.0501	0.0018	0.1601	0.0063	0.0229	0.0006	151		6		146		4		147		7
10*	72	405	0.18	0.0636	0.0016	1.1045	0.0269	0.1240	0.0015	756		13		754		9		808		35
11*	56	370	0.15	0.0639	0.0029	1.0888	0.0465	0.1223	0.0019	748		23		744		11		786		48
12*	67	944	0.07	0.0667	0.0016	1.2760	0.0452	0.1361	0.0034	835		20		823		19		776		50
13	227	1435	0.16	0.0470	0.0019	0.1464	0.0051	0.0228	0.0003	139		5		145		2		152		6
14	1181	3106	0.38	0.0492	0.0015	0.1555	0.0052	0.0227	0.0004	147		5		145		2		148		5
15	652	3257	0.20	0.0488	0.0013	0.1552	0.0052	0.0229	0.0005	146		5		146		3		134		5
东部中粒黑云母二长花岗斑岩(样品TW6328-2-6)
1	1182	825	1.43	0.0563	0.0027	0.1818	0.0101	0.0231	0.0006	170		9		147		4		157		6
2*	119	366	0.33	0.0631	0.0015	1.1994	0.0280	0.1360	0.0015	800		13		822		9		858		29
3	470	1457	0.32	0.0517	0.0015	0.1689	0.0048	0.0235	0.0003	158		4		150		2		180		7
4*	73	417	0.17	0.0650	0.0016	1.1186	0.0292	0.1239	0.0018	762		14		753		11		854		31
5*	228	461	0.49	0.0642	0.0015	1.2129	0.0287	0.1360	0.0016	807		13		822		9		906		31
6*	75	406	0.19	0.0650	0.0017	1.1213	0.0312	0.1241	0.0018	764		15		754		10		788		31
7☆	418	882	0.47	0.0820	0.0062	0.2752	0.0294	0.0230	0.0009	247		24		147		6		217		19
8	6037	3342	1.81	0.0563	0.0016	0.1789	0.0051	0.0231	0.0005	167		4		147		3		136		7
9*	223	689	0.32	0.0617	0.0014	0.6553	0.0201	0.0760	0.0016	512		12		472		10		546		19
10	321	692	0.46	0.0496	0.0037	0.1559	0.0108	0.0230	0.0006	147		10		147		4		147		8
11*	38	380	0.10	0.0641	0.0018	1.2072	0.0316	0.1359	0.0020	804		15		821		12		1126		68
12	355	402	0.88	0.0484	0.0027	0.1548	0.0090	0.0230	0.0006	146		8		147		4		164		10
13☆	927	434	2.14	0.0755	0.0043	0.2457	0.0141	0.0235	0.0006	223		12		150		4		129		6
14*	70	761	0.09	0.0648	0.0013	1.2337	0.0273	0.1362	0.0016	816		12		823		9		780		29
15	66	255	0.26	0.0546	0.0052	0.1701	0.0137	0.0232	0.0009	159		12		148		6		185		24
东部中细粒黑云母二长花岗岩(样品TW6331-1-5)
1	1001	1183	0.85	0.0569	0.0100	0.1747	0.0249	0.0225	0.0010	163		22		144		6		85.7		6
2	418	916	0.46	0.0524	0.0025	0.1677	0.0075	0.0230	0.0005	157		7		147		3		145		8
3☆	624	421	1.48	0.0783	0.0066	0.2803	0.0227	0.0260	0.0007	251		18		166		4		175		9
4*	42	359	0.12	0.0672	0.0026	1.2518	0.0457	0.1338	0.0018	824		21		809		10		806		59
5	623	1629	0.38	0.0484	0.0028	0.1529	0.0080	0.0227	0.0004	144		7		145		3		139		7
6*	38	332	0.11	0.0673	0.0017	1.2872	0.0353	0.1365	0.0019	840		16		825		11		836		42
7	453	1665	0.27	0.0546	0.0024	0.1752	0.0075	0.0229	0.0003	164		7		146		2		176		11
8☆	1095	6438	0.17	0.1291	0.0042	0.4139	0.0181	0.0224	0.0004	352		13		143		2		716		29
9*	56	194	0.29	0.0674	0.0040	1.2900	0.0914	0.1350	0.0030	841		41		816		17		1106		99
10*	66	639	0.10	0.0671	0.0015	1.2812	0.0303	0.1361	0.0019	837		14		823		11		875		35
11	384	400	0.96	0.0493	0.0023	0.1563	0.0073	0.0228	0.0004	147		6		145		2		158		6
12*	199	628	0.32	0.0655	0.0018	1.2375	0.0319	0.1349	0.0016	818		15		816		9		836		25
13	629	931	0.68	0.0598	0.0028	0.1898	0.0073	0.0229	0.0005	176		6		146		3		167		8
14	615	827	0.74	0.0514	0.0022	0.1623	0.0062	0.0228	0.0004	153		5		146		2		148		6
15*	176	731	0.24	0.0496	0.0020	0.1991	0.0080	0.0287	0.0005	184		7		182		3		195		12

Analysis data of LA-ICP-MS zircon U-Pb in the Late Jurassic biotite monzogranite in the study area

Harmonic map of zircon U-Pb age and weighted average diagram of biotite monzogranite

分析点号	Ti		La		Ce	Pr		Nd	Sm	Eu		Gd	Tb		Dy		Ho	Er		Tm		Yb	Lu		Y
南部中细粒黑云二长花岗岩(样品TW5787-1-5)
1^*	6.37		0.02		2.46	0.03		0.68	3.25	0.19		27.2	11.9		153		56	261		55		593	101		1916
2	14.06		0.54		5.19	0.30		2.01	1.47	0.26		11.1	4.3		72		31	161		39		471	83		1068
3	0		0.13		16.24	0.09		1.19	3.65	0.44		23.5	9.1		119		45	212		45		493	82		1500
4	8.65		2.52		19.59	1.07		7.55	9.13	1.57		45.5	15.3		182		64	294		60		643	105		2172
5^*	9.81		0		0.99	0.04		0.93	3.18	0.17		20.9	8.1		113		46	226		47		522	93		1488
6^*	6.08		1.56		16.00	0.76		7.99	10.12	2.63		44.9	13.1		144		49	218		43		447	75		1621
7	8.41		1.37		22.26	0.72		5.30	6.96	1.49		36.3	12.3		155		56	259		52		556	91		1894
8	2.20		1.51		16.15	0.76		4.77	5.10	0.64		30.0	10.6		133		47	216		45		473	76		1579
9	35.72		0.49		14.50	0.36		3.12	5.53	0.82		29.3	10.3		130		46	213		45		489	76		1561
10^*	140.30		0.32		2.79	0.16		1.80	4.24	0.43		28.1	11.7		161		64	306		63		689	116		2137
11^*	7.63		0.13		0.70	0.10		1.09	3.09	0.09		24.7	10.7		151		57	270		56		595	102		1922
12^*	8.22		0.14		2.73	0.10		0.82	2.08	0.19		19.5	9.7		150		61	321		76		921	165		2080
13	8.78		0.11		10.48	0.17		1.69	3.59	0.53		21.7	8.4		111		42	205		44		500	82		1434
14	11.70		1.56		25.50	1.08		8.61	12.02	1.77		65.3	21.6		248		85	385		77		802	126		2923
15	3.87		0.60		24.57	0.60		4.23	6.21	1.14		35.1	13.5		177		66	311		66		720	115		2230
东部中粒黑云母二长花岗斑岩(样品TW6328-2-6)
1	11.25		3.42		58.74	3.02		29.12	29.07	6.92		99.0	26.6		283		91	402		80		874	139		3225
2^*	3.92		0.02		2.85	0.07		1.96	5.19	0.31		41.0	16.9		237		94	464		94		1018	172		3266
3	9.50		7.86		41.55	3.23		17.78	7.99	1.88		24.9	7.6		92		33	158		33		369	61		1171
4^*	35.70		0.73		3.15	0.47		3.26	5.10	0.12		42.9	19.5		280		105	487		92		961	149		3881
5^*	0		0.15		1.89	0.32		5.49	14.04	0.28		101.1	39.1		524		198	906		174		1774	277		7170
6^*	13.35		0.06		0.59	0.08		1.17	4.46	0.07		36.5	15.2		205		77	358		73		793	127		2667
7^☆	8.53		18.09		34.24	3.33		17.58	9.17	1.99		31.8	10.0		111		39	181		36		403	65		1353
8	29.49		8.37		126.28	4.78		29.19	22.44	3.63		86.2	26.4		297		100	427		80		811	123		3492
9^*	6.43		0.18		5.54	0.20		2.47	5.15	0.37		35.6	13.9		187		72	348		70		765	126		2524
10	9.82		0.08		23.27	0.34		4.98	10.86	4.39		49.5	15.4		153		41	151		25		244	32		1472
11^*	2.61		0.32		1.41	0.11		0.81	1.77	0.12		17.9	8.3		122		47	240		53		635	111		1699
12	7.84		6.51		47.09	1.61		10.10	6.44	1.55		27.6	8.5		106		39	180		36		394	66		1351
13^☆	7.66		11.00		62.06	4.14		26.77	22.00	2.94		60.1	15.0		143		43	174		31		311	48		1426
14^*	6.69		0.06		0.72	0.02		0.73	3.41	0.05		34.5	18.7		264		87	346		60		581	86		3479
15	9.02		0.02		2.69	0.02		0.65	1.63	0.32		6.1	1.5		13		4	12		3		29	4		121
东部中细粒黑云母二长花岗岩(样品TW6331-1-5)
1	16.80		8.28		73.48	5.25		34.10	16.70	5.13		51.9	13.3		151		52	230		46		475	75		1801
2	2.13		2.44		20.03	1.44		9.52	8.68	1.10		36.6	11.6		136		50	224		46		489	76		1625
3^☆	10.39		57.36		180.78	23.79		119.54	37.68	3.57		67.1	14.4		131		39	154		28		276	45		1251
4^*	4.97		0.02		0.69	0.03		0.61	2.43	0.13		23.5	10.8		154		60	289		61		651	114		2050
5	10.06		0.08		35.23	0.36		4.61	9.59	1.99		41.3	14.0		166		57	250		52		564	89		1927
6^*	2.58		0.01		0.34	0.03		0.67	3.07	0.08		25.2	11.3		154		57	266		56		597	100		1959
7	12.08		3.47		25.28	1.57		9.26	7.99	1.10		36.5	12.4		145		53	247		50		528	88		1822
8^☆	119.18		7.91		56.09	6.35		37.19	22.75	4.72		62.7	22.0		270		92	434		93		1020	158		3169
9^*	7.94		0.05		1.16	0.02		1.32	5.38	0.12		32.5	11.3		156		61	284		58		616	106		1994
10^*	8.49		0.02		0.60	0.04		0.74	3.52	0.14		32.5	16.0		237		95	480		105		1150	195		3314
11	11.65		0.14		25.17	0.42		6.38	10.00	2.57		43.4	12.2		136		44	195		37		389	63		1478
12^*	0		0.15		3.08	0.10		1.41	6.72	0.24		46.6	20.3		293		114	544		107		1086	182		3925
13	23.29		0.37		23.38	0.44		4.28	7.75	1.39		34.4	10.9		125		43	195		38		390	64		1446
14	12.17		0.22		26.61	0.44		7.05	12.11	2.64		55.3	16.7		192		66	291		57		584	93		2166
15^*	2.16		0.01		4.07	0.03		0.53	1.52	0.23		8.8	3.4		41		14	64		14		150	24		484
点号		谐和度		²⁰⁶Pb/²³⁸U			Ce⁴⁺/Ce³⁺		(Ce/Ce^*)_N		(Ce/Ce^*)_D			(Eu/Eu^*)_N		T/℃			lg(fO₂)_D		ΔFMQ_D			ΔIW_D
南部中细粒黑云二长花岗岩(样品TW5787-1-5)
1^*		93%		414			44		27		60			0.06		705			-14.8		1.9			6.2
2		96%		146			66		3		89			0.20		779			-9.6		5.3			9.4
3		99%		145			158		37		209			0.15
4		93%		146			22		3		29			0.24		732			-16.1		-0.1			4.1
5^*		97%		821			14				19			0.07		744			-17.1		-1.3			2.9
6^*		97%		175			12		4		16			0.38		701			-20.0		-3.2			1.1
7		98%		146			39		5		51			0.29		730			-14.1		1.9			6.1
8		98%		146			34		4		45			0.16		621			-20.9		-1.9			2.6
9		96%		146			43		8		57			0.20		881			-6.9		6.0			9.9
10^*		99%		754			21		3		28			0.12		1074			-3.1		6.8			10.4
11^*		99%		744			8		2		12			0.03		721			-19.9		-3.6			0.6
12^*		98%		823			83		6		115			0.09		728			-11.2		5.0			9.2
13		95%		145			78		19		103			0.18		734			-11.3		4.7			8.9
14		98%		145			23		5		30			0.19		761			-14.6		0.8			4.9
15		99%		146			68		10		89			0.24		664			-15.7		2.1			6.5
东部中粒黑云母二长花岗斑岩(样品TW6328-2-6)
1		86%		147			14		4		19			0.40		757			-16.4		-1.0			3.1
2^*		97%		822			29		19		41			0.06		665			-18.5		-0.7			3.6
3		94%		150			28		2		36			0.41		741			-14.9		0.9			5.1
4^*		98%		753			19		1		27			0.02		881			-9.7		3.1			7.0
5^*		98%		822			4				7			0.02
6^*		98%		754			8		2		12			0.02		774			-17.3		-2.3			1.8
7^☆		49%		147			20		1		27			0.36		731			-16.5		-0.4			3.8
8		87%		147			37		5		47			0.25		859			-8.5		4.8			8.7
9^*		91%		472			40		7		55			0.08		706			-15.1		1.5			5.8
10		99%		147			21		34		27			0.58		744			-15.8		0.0			4.1
11^*		97%		821			51		2		73			0.07		634			-18.3		0.3			4.8
12		99%		147			60		4		78			0.36		723			-12.9		3.3			7.6
13^☆		60%		150			10		2		13			0.25		721			-19.6		-3.3			0.9
14^*		99%		823			14		5		20			0.01		709			-18.7		-2.1			2.2
15		92%		148			15		31		20			0.30		736			-17.4		-1.5			2.7
东部中细粒黑云母二长花岗岩(样品TW6331-1-5)
1		87%		144			18		3		23			0.53		797			-13.8		0.7			4.8
2		93%		147			24		3		32			0.19		619			-22.4		-3.2			1.3
3^☆		59%		166			5		1		7			0.22		749			-20.5		-4.9			-0.7
4^*		98%		809			26		7		38			0.05		684			-17.7		-0.5			3.8
5		99%		145			81		51		107			0.31		746			-10.5		5.2			9.3
6^*		98%		825			9		6		13			0.03		633			-24.7		-6.0			-1.6
7		88%		146			36		3		47			0.20		764			-12.7		2.5			6.7
8^☆		15%		143			17		2		23			0.38		1047			-4.7		5.5			9.2
9^*		96%		816			12		9		18			0.03		724			-18.3		-2.1			2.1
10^*		98%		823			21		5		31			0.04		731			-15.9		0.2			4.4
11		98%		145			32		26		42			0.38		760			-13.3		2.1			6.2
12^*		99%		816			39		6		55			0.04
13		81%		146			54		14		70			0.26		832			-8.1		5.7			9.7
14		95%		146			35		21		46			0.31		765			-12.7		2.5			6.6
15^*		98%		182			103		70		139			0.19		620			-16.8		2.3			6.8

Analysis data and calculation parameters of zircon trace elements of biotite monzogranite10^-6

Analysis results of biotite monzogranite main elements, rare earth and trace elements

Lithochemistry classification map of biotite monzogranite

Chondrites standardized rare earth element distribution diagram of biotite monzogranite

9]
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A (Al-Na-K)-C (Ca)-F (Mg+Fe²⁺)Genesis type discriminant illustrationof biotite monzogranite
(Base image according to White and Chappell, 1977)^[9]

Illustration of rocks genetic types of biotite monzogranite

Fe₂O₃/FeO-Rb/Sr diagram(a) and Fe₂O₃/FeO-SiO₂ diagram(b)

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