U-Pb Zircon, Geochemical and Hf Isotopic Constraints on Origin of the Bayandulan Copper Deposit, Inner Mongolia, China

Abstract

Abstract:

The Bayandulan high-mesothermal vein-type copper deposit is a newly discovered deposit in the Erenhot-East Ujimqin Banner metallogenic belt. In this paper, the authors present the new results of zircon laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) U-Pb dating, rock geochemistry and in-situ Hf isotopic analyses of biotite monzogranite from the deposit. These data provide insights into the timing as well as the mineralization of the Bayandulan deposit. The LA-ICP-MS U-Pb dating yields the crystallization ages of (300.2±2.2) Ma and (300.0±2.0) Ma for biotite monzogranite. The rock geochemistry of the granite is rich in Si, high potassium calc-alkali, weakly peraluminous, together with highly enriched the light rare earth element (LREE), Rb, K and other large-ion lithophile element (LILE), depleted Sr, Nb, Ta and other high field-strength element (HFSE). The granite has high positive ε_Hf(t) values of 6.1-10.7 and two-stage model ages (T_DM2) of 632-924 Ma, which reveals that granites are mainly derived from the partial melting of young accreted lower crust converted from the subduction of oceanic crust. Based on these analytical results, we inferred that the tectonic setting of the Bayandulan deposit has been entered into the post-orogenic stage and gradually turned to widely extension setting, since the Hegenshan back-arc basin closed between Late Carboniferous and Early Permian. During this period, the lithosphere delamination effect after collision and the upwelling of the mantle material under tension mechanism made young accreted lower crust reactivation, then acidic magma mixed with mantle source material, the emplacement of the magma brought sufficient metal elements and hydrothermal fluids, which in the end formed the Bayandulan copper deposit.

Key words: Bayandulan copper deposit, zircon U-Pb geochronology, Hf isotope, post-collisional setting, Erenhot-East Ujimqin Banner metallogenic belt, Inner Mongolia

CLC Number:

P618.41
P597

YU Chao, LIU Zhenjiang, MI Kuifeng, WANG Changbo, ZHANG Jie, WANG Jianping, LIU Jiajun, ZHANG Mei. U-Pb Zircon, Geochemical and Hf Isotopic Constraints on Origin of the Bayandulan Copper Deposit, Inner Mongolia, China[J]. Geoscience, 2017, 31(06): 1095-1113.

Figures/Tables 18

References 75

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样品编号	岩性	SiO₂	TiO₂		Al₂O₃		FeO		Fe₂O₃		MnO		MgO		CaO		Na₂O		K₂O		P₂O₅		烧失量		总量
BL1-1	黑云母二长花岗岩	70.39	0.41		14.99		2.26		0.46		0.05		0.79		0.48		4.50		4.28		0.11		(0.06)		98.66
BL1-2		69.16	0.38		15.32		2.07		0.46		0.05		0.71		1.20		4.09		4.36		0.10		0.84		98.74
BL-Z1		68.33	0.40		15.44		2.29		0.58		0.05		0.51		1.20		4.16		4.77		0.09		1.26		99.06
BL-Z2		68.69	0.44		15.55		2.20		0.93		0.08		0.93		2.00		3.94		4.01		0.11		0.87		99.75
BL-Z1BT	暗色微粒包体	52.49	1.34		17.54		8.35		2.33		0.22		3.45		3.35		4.33		2.07		0.35		2.82		97.15
BL-Z2BT	暗色微粒包体	52.65	1.34		17.57		8.20		2.51		0.23		3.46		3.35		4.33		2.07		0.35		2.77		97.38
4437-1	二长花岗岩	72.44	0.15		15.52		0.12		0.74		0.10		0.24		0.67		4.83		4.26		0.07		0.67		99.81
4437-2		74.22	0.13		14.71		0.20		0.54		0.08		0.20		0.59		4.35		4.28		0.06		0.52		99.88
4437-3		73.59	0.17		14.56		0.47		0.92		0.10		0.36		1.01		4.48		3.57		0.09		0.65		99.97
4437-4		71.56	0.15		16.38		0.18		0.65		0.07		0.21		0.58		4.94		4.35		0.05		0.74		99.86
样品编号	岩性	Rb		Ba		Th		U		Nb		Ta		La		Ce		Pr		Sr		Nd		Sm
BL1-1	黑云母二长花岗岩	113.50		892.00		14.10		2.30		10.20		1.20		24.50		52.20		5.93		205.00		22.10		5.56
BL1-2		122.00		917.00		13.95		2.71		9.90		1.20		34.20		69.70		7.44		354.00		27.60		5.88
BL-Z1		117.50		817.00		10.55		7.76		8.90		0.70		48.50		95.40		10.80		229.00		39.80		6.85
BL-Z2		165.50		615.00		14.90		8.17		11.90		1.70		26.70		51.20		6.38		256.00		24.60		5.05
BL-Z1BT	暗色微粒包体	212.00		161.50		11.25		20.20		23.70		1.30		45.60		102.00		13.90		383.00		57.20		13.95
BL-Z2BT	暗色微粒包体	251.00		187.00		13.30		25.20		28.60		1.50		53.00		116.00		16.20		441.00		66.50		16.15
4437-1	二长花岗岩	177.00		706.00		6.63		3.18		10.50		0.97		5.50		17.20		1.28		203.00		4.39		0.86
4437-2		162.00		298.00		12.40		5.33		10.50		2.31		16.90		31.40		3.65		135.00		12.90		2.47
4437-3		190.00		475.00		15.50		4.65		7.91		1.51		14.10		28.60		2.70		101.00		9.11		1.61
4437-4		174.00		468.00		14.80		4.47		9.51		1.85		31.50		60.40		6.26		110.00		21.30		3.66
样品编号	岩性	Zr		Hf		Eu		Gd		Tb		Dy		Y		Ho		Er		Tm		Yb		Lu
BL1-1	黑云母二长花岗岩	386.00		10.50		1.29		4.67		0.79		4.17		24.30		0.94		2.84		0.47		3.05		0.55
BL1-2		369.00		10.00		1.36		4.73		0.78		4.43		25.70		0.97		2.71		0.49		2.96		0.53
BL-Z1		493.00		10.70		1.31		5.23		0.73		4.06		28.20		0.85		2.20		0.31		2.08		0.35
BL-Z2		316.00		7.50		0.88		4.35		0.72		4.15		30.20		0.88		2.63		0.42		2.78		0.44
BL-Z1BT	暗色微粒包体	306.00		7.40		1.37		11.95		1.92		10.60		68.00		2.23		6.14		0.89		6.17		0.92
BL-Z2BT	暗色微粒包体	336.00		8.40		1.56		14.40		2.42		13.30		78.00		2.68		7.56		1.08		7.03		1.11
4437-1	二长花岗岩	149.00		11.50		0.33		0.85		0.16		1.02		5.30		0.23		0.70		0.11		0.77		0.12
4437-2		68.90		2.70		0.32		2.19		0.34		1.89		11.00		0.40		1.15		0.19		1.24		0.19
4437-3		73.80		2.86		0.30		1.58		0.23		1.23		6.39		0.25		0.71		0.10		0.66		0.09
4437-4		62.60		2.70		0.44		3.21		0.41		1.92		9.54		0.37		1.00		0.15		0.92		0.14

样品编号	岩性	SiO₂	TiO₂		Al₂O₃		FeO		Fe₂O₃		MnO		MgO		CaO		Na₂O		K₂O		P₂O₅		烧失量		总量
BL1-1	黑云母二长花岗岩	70.39	0.41		14.99		2.26		0.46		0.05		0.79		0.48		4.50		4.28		0.11		(0.06)		98.66
BL1-2		69.16	0.38		15.32		2.07		0.46		0.05		0.71		1.20		4.09		4.36		0.10		0.84		98.74
BL-Z1		68.33	0.40		15.44		2.29		0.58		0.05		0.51		1.20		4.16		4.77		0.09		1.26		99.06
BL-Z2		68.69	0.44		15.55		2.20		0.93		0.08		0.93		2.00		3.94		4.01		0.11		0.87		99.75
BL-Z1BT	暗色微粒包体	52.49	1.34		17.54		8.35		2.33		0.22		3.45		3.35		4.33		2.07		0.35		2.82		97.15
BL-Z2BT	暗色微粒包体	52.65	1.34		17.57		8.20		2.51		0.23		3.46		3.35		4.33		2.07		0.35		2.77		97.38
4437-1	二长花岗岩	72.44	0.15		15.52		0.12		0.74		0.10		0.24		0.67		4.83		4.26		0.07		0.67		99.81
4437-2		74.22	0.13		14.71		0.20		0.54		0.08		0.20		0.59		4.35		4.28		0.06		0.52		99.88
4437-3		73.59	0.17		14.56		0.47		0.92		0.10		0.36		1.01		4.48		3.57		0.09		0.65		99.97
4437-4		71.56	0.15		16.38		0.18		0.65		0.07		0.21		0.58		4.94		4.35		0.05		0.74		99.86
样品编号	岩性	Rb		Ba		Th		U		Nb		Ta		La		Ce		Pr		Sr		Nd		Sm
BL1-1	黑云母二长花岗岩	113.50		892.00		14.10		2.30		10.20		1.20		24.50		52.20		5.93		205.00		22.10		5.56
BL1-2		122.00		917.00		13.95		2.71		9.90		1.20		34.20		69.70		7.44		354.00		27.60		5.88
BL-Z1		117.50		817.00		10.55		7.76		8.90		0.70		48.50		95.40		10.80		229.00		39.80		6.85
BL-Z2		165.50		615.00		14.90		8.17		11.90		1.70		26.70		51.20		6.38		256.00		24.60		5.05
BL-Z1BT	暗色微粒包体	212.00		161.50		11.25		20.20		23.70		1.30		45.60		102.00		13.90		383.00		57.20		13.95
BL-Z2BT	暗色微粒包体	251.00		187.00		13.30		25.20		28.60		1.50		53.00		116.00		16.20		441.00		66.50		16.15
4437-1	二长花岗岩	177.00		706.00		6.63		3.18		10.50		0.97		5.50		17.20		1.28		203.00		4.39		0.86
4437-2		162.00		298.00		12.40		5.33		10.50		2.31		16.90		31.40		3.65		135.00		12.90		2.47
4437-3		190.00		475.00		15.50		4.65		7.91		1.51		14.10		28.60		2.70		101.00		9.11		1.61
4437-4		174.00		468.00		14.80		4.47		9.51		1.85		31.50		60.40		6.26		110.00		21.30		3.66
样品编号	岩性	Zr		Hf		Eu		Gd		Tb		Dy		Y		Ho		Er		Tm		Yb		Lu
BL1-1	黑云母二长花岗岩	386.00		10.50		1.29		4.67		0.79		4.17		24.30		0.94		2.84		0.47		3.05		0.55
BL1-2		369.00		10.00		1.36		4.73		0.78		4.43		25.70		0.97		2.71		0.49		2.96		0.53
BL-Z1		493.00		10.70		1.31		5.23		0.73		4.06		28.20		0.85		2.20		0.31		2.08		0.35
BL-Z2		316.00		7.50		0.88		4.35		0.72		4.15		30.20		0.88		2.63		0.42		2.78		0.44
BL-Z1BT	暗色微粒包体	306.00		7.40		1.37		11.95		1.92		10.60		68.00		2.23		6.14		0.89		6.17		0.92
BL-Z2BT	暗色微粒包体	336.00		8.40		1.56		14.40		2.42		13.30		78.00		2.68		7.56		1.08		7.03		1.11
4437-1	二长花岗岩	149.00		11.50		0.33		0.85		0.16		1.02		5.30		0.23		0.70		0.11		0.77		0.12
4437-2		68.90		2.70		0.32		2.19		0.34		1.89		11.00		0.40		1.15		0.19		1.24		0.19
4437-3		73.80		2.86		0.30		1.58		0.23		1.23		6.39		0.25		0.71		0.10		0.66		0.09
4437-4		62.60		2.70		0.44		3.21		0.41		1.92		9.54		0.37		1.00		0.15		0.92		0.14

测试点号	Th/10^-6	U/10^-6	Pb/10^-6	Th/U	同位素比值					年龄/Ma
测试点号	Th/10^-6	U/10^-6	Pb/10^-6	Th/U	²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U			²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
BL1-02	158.56	381.55	19.10	0.42	0.343 92	0.012 05	0.047 90	0.000 66	300		9	302	4
BL1-03	103.84	228.17	11.61	0.46	0.343 24	0.020 28	0.047 67	0.000 75	300		15	300	5
BL1-04	141.01	361.77	17.98	0.39	0.340 40	0.012 07	0.047 28	0.000 63	297		9	298	4
BL1-05	113.38	236.93	12.11	0.48	0.340 96	0.015 88	0.047 61	0.000 70	298		12	300	4
BL1-08	226.42	383.68	20.25	0.59	0.345 99	0.011 48	0.047 71	0.000 63	302		9	300	4
BL1-10	75.99	276.89	14.18	0.27	0.367 37	0.015 50	0.047 09	0.000 63	318		12	297	4
BL1-11	119.22	242.37	13.04	0.49	0.363 79	0.018 47	0.047 82	0.000 70	315		14	301	4
BL1-12	109.67	166.53	9.73	0.66	0.358 41	0.020 61	0.047 14	0.000 75	311		15	297	5
BL1-18	382.47	1 420.89	72.04	0.27	0.352 21	0.010 35	0.048 27	0.000 59	306		8	304	4
BL1-20	65.31	629.05	30.57	0.10	0.349 42	0.009 16	0.048 35	0.000 60	304		7	304	4
BL1-26	110.78	356.60	17.93	0.31	0.354 06	0.010 52	0.047 31	0.000 60	308		8	298	4
BL1-27	48.78	124.22	6.40	0.39	0.344 00	0.015 79	0.047 38	0.000 67	300		12	298	4
BL1-28	58.24	153.42	7.94	0.38	0.343 43	0.011 69	0.047 77	0.000 64	300		9	301	4
BL1-29	76.28	214.89	11.12	0.35	0.346 31	0.011 11	0.047 92	0.000 62	302		8	302	4
BL2-01	390.64	1241.56	75.02	0.31	0.336 86	0.016 23	0.046 02	0.000 56	295		12	290	3
BL2-06	45.92	118.34	5.86	0.39	0.348 09	0.021 83	0.048 38	0.000 83	303		16	305	5
BL2-07	95.76	209.94	24.94	0.46	0.339 91	0.018 41	0.047 21	0.000 77	297		14	297	5
BL2-08	38.33	101.05	5.14	0.38	0.344 18	0.030 08	0.047 65	0.000 85	300		23	300	5
BL2-09	91.05	267.87	13.83	0.34	0.345 68	0.012 33	0.047 76	0.000 65	301		9	301	4
BL2-10	98.96	291.63	14.47	0.34	0.347 12	0.017 65	0.048 00	0.000 66	303		13	302	4
BL2-11	79.50	181.09	9.38	0.44	0.342 00	0.022 42	0.047 46	0.000 71	299		17	299	4
BL2-13	102.03	236.30	13.85	0.43	0.340 33	0.022 64	0.046 14	0.000 67	297		17	291	4
BL2-15	136.33	288.44	14.74	0.47	0.346 03	0.013 20	0.047 81	0.000 63	302		10	301	4
BL2-17	65.25	162.95	8.35	0.40	0.343 77	0.024 67	0.047 63	0.000 83	300		19	300	5
BL2-18	61.13	163.36	8.41	0.37	0.347 48	0.015 44	0.047 97	0.000 65	303		12	302	4
BL2-19	249.00	798.83	40.19	0.31	0.355 07	0.006 89	0.049 12	0.000 56	309		5	309	3
BL2-21	189.26	405.58	22.24	0.47	0.341 33	0.013 57	0.047 08	0.000 58	298		10	297	4
BL2-23	82.87	227.96	10.89	0.36	0.335 95	0.018 47	0.047 03	0.000 74	294		14	296	5
BL2-24	268.72	1 029.77	51.11	0.26	0.376 44	0.009 93	0.047 55	0.000 56	324		7	299	3
BL2-27	316.44	741.82	40.68	0.43	0.342 46	0.014 46	0.047 48	0.000 60	299		11	299	4
BL2-29	112.13	449.76	24.43	0.25	0.362 19	0.009 63	0.047 96	0.000 56	314		7	302	3
BL2-30	103.47	278.62	15.14	0.37	0.352 11	0.013 71	0.047 71	0.000 61	306		10	300	4
BL2-31	91.25	290.46	13.06	0.31	0.379 16	0.012 64	0.048 10	0.000 65	326		9	303	4

测试点号	Th/10^-6	U/10^-6	Pb/10^-6	Th/U	同位素比值					年龄/Ma
测试点号	Th/10^-6	U/10^-6	Pb/10^-6	Th/U	²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U			²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
BL1-02	158.56	381.55	19.10	0.42	0.343 92	0.012 05	0.047 90	0.000 66	300		9	302	4
BL1-03	103.84	228.17	11.61	0.46	0.343 24	0.020 28	0.047 67	0.000 75	300		15	300	5
BL1-04	141.01	361.77	17.98	0.39	0.340 40	0.012 07	0.047 28	0.000 63	297		9	298	4
BL1-05	113.38	236.93	12.11	0.48	0.340 96	0.015 88	0.047 61	0.000 70	298		12	300	4
BL1-08	226.42	383.68	20.25	0.59	0.345 99	0.011 48	0.047 71	0.000 63	302		9	300	4
BL1-10	75.99	276.89	14.18	0.27	0.367 37	0.015 50	0.047 09	0.000 63	318		12	297	4
BL1-11	119.22	242.37	13.04	0.49	0.363 79	0.018 47	0.047 82	0.000 70	315		14	301	4
BL1-12	109.67	166.53	9.73	0.66	0.358 41	0.020 61	0.047 14	0.000 75	311		15	297	5
BL1-18	382.47	1 420.89	72.04	0.27	0.352 21	0.010 35	0.048 27	0.000 59	306		8	304	4
BL1-20	65.31	629.05	30.57	0.10	0.349 42	0.009 16	0.048 35	0.000 60	304		7	304	4
BL1-26	110.78	356.60	17.93	0.31	0.354 06	0.010 52	0.047 31	0.000 60	308		8	298	4
BL1-27	48.78	124.22	6.40	0.39	0.344 00	0.015 79	0.047 38	0.000 67	300		12	298	4
BL1-28	58.24	153.42	7.94	0.38	0.343 43	0.011 69	0.047 77	0.000 64	300		9	301	4
BL1-29	76.28	214.89	11.12	0.35	0.346 31	0.011 11	0.047 92	0.000 62	302		8	302	4
BL2-01	390.64	1241.56	75.02	0.31	0.336 86	0.016 23	0.046 02	0.000 56	295		12	290	3
BL2-06	45.92	118.34	5.86	0.39	0.348 09	0.021 83	0.048 38	0.000 83	303		16	305	5
BL2-07	95.76	209.94	24.94	0.46	0.339 91	0.018 41	0.047 21	0.000 77	297		14	297	5
BL2-08	38.33	101.05	5.14	0.38	0.344 18	0.030 08	0.047 65	0.000 85	300		23	300	5
BL2-09	91.05	267.87	13.83	0.34	0.345 68	0.012 33	0.047 76	0.000 65	301		9	301	4
BL2-10	98.96	291.63	14.47	0.34	0.347 12	0.017 65	0.048 00	0.000 66	303		13	302	4
BL2-11	79.50	181.09	9.38	0.44	0.342 00	0.022 42	0.047 46	0.000 71	299		17	299	4
BL2-13	102.03	236.30	13.85	0.43	0.340 33	0.022 64	0.046 14	0.000 67	297		17	291	4
BL2-15	136.33	288.44	14.74	0.47	0.346 03	0.013 20	0.047 81	0.000 63	302		10	301	4
BL2-17	65.25	162.95	8.35	0.40	0.343 77	0.024 67	0.047 63	0.000 83	300		19	300	5
BL2-18	61.13	163.36	8.41	0.37	0.347 48	0.015 44	0.047 97	0.000 65	303		12	302	4
BL2-19	249.00	798.83	40.19	0.31	0.355 07	0.006 89	0.049 12	0.000 56	309		5	309	3
BL2-21	189.26	405.58	22.24	0.47	0.341 33	0.013 57	0.047 08	0.000 58	298		10	297	4
BL2-23	82.87	227.96	10.89	0.36	0.335 95	0.018 47	0.047 03	0.000 74	294		14	296	5
BL2-24	268.72	1 029.77	51.11	0.26	0.376 44	0.009 93	0.047 55	0.000 56	324		7	299	3
BL2-27	316.44	741.82	40.68	0.43	0.342 46	0.014 46	0.047 48	0.000 60	299		11	299	4
BL2-29	112.13	449.76	24.43	0.25	0.362 19	0.009 63	0.047 96	0.000 56	314		7	302	3
BL2-30	103.47	278.62	15.14	0.37	0.352 11	0.013 71	0.047 71	0.000 61	306		10	300	4
BL2-31	91.25	290.46	13.06	0.31	0.379 16	0.012 64	0.048 10	0.000 65	326		9	303	4

测试点号	年龄/Ma	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	2σ	ε_Hf(0)	f_Lu/Hf	ε_Hf(t)	T_DM1	T_DM2
BL1-02	302.00	0.02	0.000 7	0.282 897	0.000 009	4.4	-0.98	10.9	499	619
BL1-03	300.00	0.03	0.001 0	0.282 885	0.000 010	4.0	-0.97	10.4	521	652
BL1-04	298.00	0.03	0.001 0	0.282 829	0.000 008	2.0	-0.97	8.4	599	775
BL1-05	300.00	0.02	0.000 8	0.282 866	0.000 007	3.3	-0.98	9.8	545	691
BL1-08	300.00	0.04	0.001 3	0.282 840	0.000 010	2.4	-0.96	8.8	588	754
BL1-10	297.00	0.04	0.001 3	0.282 836	0.000 010	2.2	-0.96	8.5	595	766
BL1-11	301.00	0.03	0.000 9	0.282 863	0.000 009	3.2	-0.97	9.7	550	699
BL1-18	304.00	0.03	0.001 0	0.282 866	0.000 007	3.3	-0.97	9.8	547	693
BL1-20	304.00	0.05	0.001 7	0.282 761	0.000 007	-0.4	-0.95	6.0	709	939
BL1-26	298.00	0.02	0.000 6	0.282 803	0.000 009	1.1	-0.98	7.5	630	830
BL1-27	298.00	0.02	0.000 7	0.282 866	0.000 010	3.3	-0.98	9.7	543	690
BL1-28	301.00	0.03	0.000 8	0.282 851	0.000 012	2.8	-0.97	9.2	566	726
BL1-29	302.00	0.02	0.000 7	0.282 843	0.000 008	2.5	-0.98	9.0	576	742
BL2-01	290.00	0.02	0.000 7	0.282 847	0.000 008	2.7	-0.98	9.1	569	732
BL2-06	305.00	0.02	0.000 7	0.282 867	0.000 009	3.4	-0.98	9.8	541	687
BL2-09	301.00	0.02	0.000 7	0.282 821	0.000 010	1.7	-0.98	8.2	605	790
BL2-10	302.00	0.03	0.000 8	0.282 893	0.000 009	4.3	-0.98	10.7	506	629
BL2-11	299.00	0.02	0.000 7	0.282 859	0.000 009	3.1	-0.98	9.5	552	705
BL2-13	291.00	0.03	0.001 0	0.282 779	0.000 012	0.2	-0.97	6.6	671	890
BL2-17	300.00	0.02	0.000 6	0.282 850	0.000 009	2.7	-0.98	9.2	564	725
BL2-18	302.00	0.01	0.000 5	0.282 881	0.000 011	3.8	-0.99	10.3	519	654
BL2-19	309.00	0.02	0.000 8	0.282 895	0.000 008	4.3	-0.98	10.8	503	626
BL2-21	297.00	0.05	0.001 5	0.282 894	0.000 009	4.3	-0.96	10.6	513	635
BL2-24	299.00	0.02	0.000 7	0.282 846	0.000 008	2.6	-0.98	9.1	570	734
BL2-27	299.00	0.04	0.001 5	0.282 856	0.000 022	3.0	-0.95	9.3	568	722
BL2-29	302.00	0.03	0.000 9	0.282 814	0.000 008	1.5	-0.97	7.9	618	808
BL2-30	300.00	0.06	0.001 6	0.282 831	0.000 009	2.1	-0.95	8.4	605	778