辽宁北部秀水盆地白垩系义县组泥岩地球化学特征及地质意义

doi:10.19657/j.geoscience.1000-8527.2019.02.04

摘要/Abstract

摘要：

沉积岩的地球化学特征蕴含了大量的地质信息,对于沉积环境的重塑及物源研究具有重要意义。通过对辽宁北部秀水盆地秀D1井义县组泥岩样品常量、微量及稀土元素等地球化学特征的研究表明:泥岩样品轻稀土元素富集,重稀土元素亏损严重,配分曲线“右倾”,可见中等Eu负异常和微弱的Ce负异常,指示稳定的上地壳物源注入。盆地北东—东部的侏罗系、二叠系酸性侵入岩与义县组沉积岩具有较好的亲缘性,可能为其主要物源,源区构造背景主要为活动大陆边缘。B、Sr/Ba、La_N/Sm_N、V/(V+Ni)、Fe²⁺/Fe³⁺、Cu/Zn及Ce_anom等地球化学指标表明义县组沉积时期为淡水环境,古沉积环境为深水还原环境。

关键词: 秀水盆地, 义县组, 秀D1井, 地球化学, 沉积环境, 物源, 构造背景

Abstract:

The geochemical characteristics of sedimentary rocks contain a large amount of geological information, which is of great significance for restoring the sedimentary environments and the provenances. Through the analysis on geochemical characteristics such as major, trace elements and REE of mudstone samples of the Yi-xian Formation from Well Xiu-D1, the results show: REE in mudstones are enriched of LREE with a deficit of HREE. The REE patterns incline to the right, with slightly negative Ce anomalies and moderately negative Eu anomalies, indicates stable provenance input from upper continental crust. The acidic intrusive rocks of the Jurassic and Permian in the northeast-east part of the basin have a great affinity with sedimentary strata of the Yixian Formation,so acidic intrusive are highly likely to be provenance of sedimentary strata. The tectonic setting of provenance area is mainly active continental margin. The geochemical indicators such as B, Sr/Ba, La_N/Sm_N,V/(V+Ni), Fe²⁺/Fe³⁺, Cu/Zn and Ce_anom indicate that the Yixian Formation was deposited in fresh, deep water with a reductive environment.

Key words: Xiushui Basin, Yixian Formation, Well Xiu-D1, geochemistry, sedimentary environment, provenance, tectonic setting

中图分类号:

P588.22

李文博, 李晓海, 丁秋红, 陈树旺, 张健. 辽宁北部秀水盆地白垩系义县组泥岩地球化学特征及地质意义[J]. 现代地质, 2019, 33(02): 284-292.

LI Wenbo, LI Xiaohai, DING Qiuhong, CHEN Shuwang, ZHANG Jian. Geochemical Characteristics of the Cretaceous Yixian Formation Mudstones in Xiushui Basin of Northern Liaoning and Their Geological Significance[J]. Geoscience, 2019, 33(02): 284-292.

图/表 11

参考文献 31

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样号	La	Ce	Pr	Nd	Sm		Eu		Gd		Tb	Dy		Ho		Er		Tm
1	21.6	26.3	5.04	17.5	3.43		0.45		2.58		0.54	3.30		0.67		1.81		0.36
2	17.4	27.0	4.04	14.3	2.91		0.40		2.24		0.47	3.06		0.65		1.78		0.35
3	11.3	34.2	2.84	10.6	2.51		0.40		2.10		0.51	3.55		0.74		1.93		0.39
4	26.8	29.4	5.74	18.9	3.51		0.42		2.65		0.51	3.24		0.65		1.76		0.35
5	17.2	21.3	3.90	13.6	2.74		0.38		2.06		0.47	3.06		0.63		1.74		0.34
6	36.7	65.8	7.23	26.8	4.32		1.38		3.33		0.52	2.62		0.44		1.02		0.16
7	29.2	54.4	5.73	20.6	3.38		1.09		2.71		0.40	1.98		0.35		0.85		0.13
8	32.3	58.3	6.17	22.4	3.70		1.13		3.00		0.44	2.10		0.38		0.91		0.14
9	61.8	157.0	12.00	41.6	6.17		0.75		5.46		0.72	3.55		0.68		1.71		0.29
10	57.3	97.0	10.40	35.1	5.15		1.02		4.26		0.57	2.64		0.46		1.14		0.19
11	52.8	89.8	9.70	32.6	4.90		0.97		3.96		0.52	2.42		0.42		1.04		0.17
12	52.9	88.8	9.86	31.6	4.83		0.97		3.82		0.53	2.72		0.46		1.12		0.17
13	51.3	85.5	9.34	31.6	4.74		0.94		3.89		0.51	2.44		0.43		1.06		0.17
14	53.0	88.2	9.57	32.1	4.71		0.97		3.94		0.54	2.61		0.47		1.16		0.19
15	55.9	91.7	10.30	34.9	5.16		1.08		4.32		0.58	2.78		0.47		1.12		0.18
16	54.9	91.8	10.40	33.0	5.07		1.03		4.12		0.54	2.39		0.44		1.11		0.17
17	73.0	160.0	14.20	48.4	6.90		0.75		5.91		0.79	3.93		0.74		1.89		0.32
18	44.1	100.0	8.59	28.9	4.22		0.47		3.51		0.39	1.62		0.35		0.83		0.13
平均值	41.64	75.92	8.06	27.47	4.35		0.81		3.55		0.53	2.78		0.52		1.33		0.23
样号	Yb	Lu	Y	ΣREE		LREE		HREE		LREE/ HREE			球粒陨石标准化
样号	Yb	Lu	Y	ΣREE		LREE		HREE		LREE/ HREE			La_N/Yb_N		δEu		δCe
1	2.62	0.38	17.90	86.58		74.32		12.26		6.06			4.79		0.44		0.59
2	2.59	0.37	16.30	77.56		66.05		11.51		5.74			3.90		0.46		0.76
3	2.82	0.40	17.90	74.29		61.85		12.44		4.97			2.33		0.52		1.43
4	2.54	0.37	16.40	96.84		84.77		12.07		7.02			6.13		0.40		0.55
5	2.60	0.36	16.60	70.38		59.12		11.26		5.25			3.85		0.47		0.61
6	1.05	0.15	9.55	151.52		142.23		9.29		15.31			20.32		1.07		0.93
7	0.88	0.13	8.30	121.83		114.40		7.43		15.40			19.29		1.06		0.97
8	0.98	0.14	9.07	132.09		124.00		8.09		15.33			19.16		1.00		0.95
9	2.06	0.31	16.20	294.10		279.32		14.78		18.90			17.44		0.39		1.33
10	1.29	0.18	12.10	216.70		205.97		10.73		19.20			25.82		0.65		0.91
11	1.14	0.16	11.00	200.60		190.77		9.83		19.41			26.92		0.65		0.91
12	1.21	0.17	11.50	199.16		188.96		10.20		18.53			25.41		0.67		0.89
13	1.18	0.17	12.00	193.27		183.42		9.85		18.62			25.27		0.65		0.89
14	1.26	0.19	12.20	198.91		188.55		10.36		18.20			24.45		0.67		0.89
15	1.18	0.17	10.90	209.84		199.04		10.80		18.43			27.54		0.68		0.87
16	1.15	0.18	10.60	206.30		196.20		10.10		19.43			27.75		0.67		0.88
17	2.21	0.33	6.76	319.37		303.25		16.12		18.81			19.20		0.35		1.15
18	0.98	0.14	15.20	194.23		186.28		7.95		23.43			26.16		0.36		1.18
平均值	1.65	0.24	12.80	169.09		158.25		10.84		14.89			18.10		0.62		0.93

样号	La	Ce	Pr	Nd	Sm		Eu		Gd		Tb	Dy		Ho		Er		Tm
1	21.6	26.3	5.04	17.5	3.43		0.45		2.58		0.54	3.30		0.67		1.81		0.36
2	17.4	27.0	4.04	14.3	2.91		0.40		2.24		0.47	3.06		0.65		1.78		0.35
3	11.3	34.2	2.84	10.6	2.51		0.40		2.10		0.51	3.55		0.74		1.93		0.39
4	26.8	29.4	5.74	18.9	3.51		0.42		2.65		0.51	3.24		0.65		1.76		0.35
5	17.2	21.3	3.90	13.6	2.74		0.38		2.06		0.47	3.06		0.63		1.74		0.34
6	36.7	65.8	7.23	26.8	4.32		1.38		3.33		0.52	2.62		0.44		1.02		0.16
7	29.2	54.4	5.73	20.6	3.38		1.09		2.71		0.40	1.98		0.35		0.85		0.13
8	32.3	58.3	6.17	22.4	3.70		1.13		3.00		0.44	2.10		0.38		0.91		0.14
9	61.8	157.0	12.00	41.6	6.17		0.75		5.46		0.72	3.55		0.68		1.71		0.29
10	57.3	97.0	10.40	35.1	5.15		1.02		4.26		0.57	2.64		0.46		1.14		0.19
11	52.8	89.8	9.70	32.6	4.90		0.97		3.96		0.52	2.42		0.42		1.04		0.17
12	52.9	88.8	9.86	31.6	4.83		0.97		3.82		0.53	2.72		0.46		1.12		0.17
13	51.3	85.5	9.34	31.6	4.74		0.94		3.89		0.51	2.44		0.43		1.06		0.17
14	53.0	88.2	9.57	32.1	4.71		0.97		3.94		0.54	2.61		0.47		1.16		0.19
15	55.9	91.7	10.30	34.9	5.16		1.08		4.32		0.58	2.78		0.47		1.12		0.18
16	54.9	91.8	10.40	33.0	5.07		1.03		4.12		0.54	2.39		0.44		1.11		0.17
17	73.0	160.0	14.20	48.4	6.90		0.75		5.91		0.79	3.93		0.74		1.89		0.32
18	44.1	100.0	8.59	28.9	4.22		0.47		3.51		0.39	1.62		0.35		0.83		0.13
平均值	41.64	75.92	8.06	27.47	4.35		0.81		3.55		0.53	2.78		0.52		1.33		0.23
样号	Yb	Lu	Y	ΣREE		LREE		HREE		LREE/ HREE			球粒陨石标准化
样号	Yb	Lu	Y	ΣREE		LREE		HREE		LREE/ HREE			La_N/Yb_N		δEu		δCe
1	2.62	0.38	17.90	86.58		74.32		12.26		6.06			4.79		0.44		0.59
2	2.59	0.37	16.30	77.56		66.05		11.51		5.74			3.90		0.46		0.76
3	2.82	0.40	17.90	74.29		61.85		12.44		4.97			2.33		0.52		1.43
4	2.54	0.37	16.40	96.84		84.77		12.07		7.02			6.13		0.40		0.55
5	2.60	0.36	16.60	70.38		59.12		11.26		5.25			3.85		0.47		0.61
6	1.05	0.15	9.55	151.52		142.23		9.29		15.31			20.32		1.07		0.93
7	0.88	0.13	8.30	121.83		114.40		7.43		15.40			19.29		1.06		0.97
8	0.98	0.14	9.07	132.09		124.00		8.09		15.33			19.16		1.00		0.95
9	2.06	0.31	16.20	294.10		279.32		14.78		18.90			17.44		0.39		1.33
10	1.29	0.18	12.10	216.70		205.97		10.73		19.20			25.82		0.65		0.91
11	1.14	0.16	11.00	200.60		190.77		9.83		19.41			26.92		0.65		0.91
12	1.21	0.17	11.50	199.16		188.96		10.20		18.53			25.41		0.67		0.89
13	1.18	0.17	12.00	193.27		183.42		9.85		18.62			25.27		0.65		0.89
14	1.26	0.19	12.20	198.91		188.55		10.36		18.20			24.45		0.67		0.89
15	1.18	0.17	10.90	209.84		199.04		10.80		18.43			27.54		0.68		0.87
16	1.15	0.18	10.60	206.30		196.20		10.10		19.43			27.75		0.67		0.88
17	2.21	0.33	6.76	319.37		303.25		16.12		18.81			19.20		0.35		1.15
18	0.98	0.14	15.20	194.23		186.28		7.95		23.43			26.16		0.36		1.18
平均值	1.65	0.24	12.80	169.09		158.25		10.84		14.89			18.10		0.62		0.93

样号	B	Ba	Cr	Cu	Ga	Ni	Rb	Sr	V	Zn	Co	Th	U	Sc	Sr/Ba	Cu/Zn	V/ (V+Ni)
1	82.70	697.00	55.90	30.60	26.20	36.50	232.00	306.00	92.90	115.00	15.90	14.70	2.59	14.00	0.44	0.27	0.72
2	95.10	648.00	55.80	29.70	24.20	32.80	166.00	335.00	106.00	112.00	13.10	13.80	2.59	12.90	0.52	0.27	0.76
3	38.70	673.00	58.90	32.60	24.10	37.90	178.00	401.00	121.00	138.00	16.60	14.40	2.91	13.90	0.60	0.24	0.76
4	56.90	794.00	46.00	37.50	25.60	34.70	165.00	358.00	77.40	132.00	15.30	14.00	3.54	11.30	0.45	0.28	0.69
5	47.50	626.00	44.80	28.20	21.60	23.60	161.00	300.00	90.50	115.00	12.00	12.20	2.50	10.50	0.48	0.25	0.79
6	42.10	684.00	51.00	32.10	23.40	30.80	197.00	344.00	109.00	133.00	13.60	13.70	3.03	12.80	0.50	0.24	0.78
7	26.10	622.00	55.70	35.50	19.10	27.90	133.00	331.00	98.60	108.00	12.80	10.20	3.34	10.60	0.53	0.33	0.78
8	68.70	612.00	58.90	35.40	24.80	45.60	184.00	325.00	108.00	118.00	16.00	16.80	3.29	12.60	0.53	0.30	0.70
9	9.61	788.00	49.20	20.00	20.80	13.90	144.00	237.00	85.60	32.60	2.43	11.00	3.41	10.20	0.30	0.61	0.86
10	26.20	780.00	43.30	30.60	21.40	31.00	157.00	321.00	79.70	107.00	11.80	10.30	3.05	8.66	0.41	0.29	0.72
11	31.50	656.00	52.70	38.20	20.80	34.60	160.00	266.00	104.00	110.00	13.70	11.60	3.68	10.60	0.41	0.35	0.75
12	37.00	662.00	57.80	36.10	25.90	47.00	170.00	338.00	98.40	123.00	16.00	15.10	3.68	13.40	0.51	0.29	0.68
13	45.00	674.00	52.30	25.70	20.70	33.70	122.00	390.00	88.30	86.20	12.20	10.80	2.55	10.90	0.58	0.30	0.72
14	32.90	645.00	64.40	35.10	23.80	43.60	151.00	378.00	95.40	104.00	15.70	13.00	4.12	12.30	0.59	0.34	0.69
15	61.30	821.00	51.10	37.70	28.70	42.60	201.00	481.00	86.20	113.00	16.30	16.10	4.10	11.80	0.59	0.33	0.67
16	50.50	725.00	55.70	32.10	23.80	31.30	164.00	483.00	94.20	99.90	14.30	13.90	3.70	11.70	0.67	0.32	0.75
17	39.70	581.00	59.80	40.10	23.40	43.20	149.00	231.00	91.20	118.00	13.90	12.20	3.58	12.10	0.40	0.34	0.68
18	14.40	696.00	25.60	14.70	22.40	14.80	146.00	149.00	40.00	88.60	7.14	14.70	4.54	9.06	0.21	0.17	0.73
平均值	44.77	688.00	52.16	31.77	23.37	33.64	165.56	331.89	92.58	108.52	13.27	13.25	3.34	11.63	0.48	0.31	0.74

样号	B	Ba	Cr	Cu	Ga	Ni	Rb	Sr	V	Zn	Co	Th	U	Sc	Sr/Ba	Cu/Zn	V/ (V+Ni)
1	82.70	697.00	55.90	30.60	26.20	36.50	232.00	306.00	92.90	115.00	15.90	14.70	2.59	14.00	0.44	0.27	0.72
2	95.10	648.00	55.80	29.70	24.20	32.80	166.00	335.00	106.00	112.00	13.10	13.80	2.59	12.90	0.52	0.27	0.76
3	38.70	673.00	58.90	32.60	24.10	37.90	178.00	401.00	121.00	138.00	16.60	14.40	2.91	13.90	0.60	0.24	0.76
4	56.90	794.00	46.00	37.50	25.60	34.70	165.00	358.00	77.40	132.00	15.30	14.00	3.54	11.30	0.45	0.28	0.69
5	47.50	626.00	44.80	28.20	21.60	23.60	161.00	300.00	90.50	115.00	12.00	12.20	2.50	10.50	0.48	0.25	0.79
6	42.10	684.00	51.00	32.10	23.40	30.80	197.00	344.00	109.00	133.00	13.60	13.70	3.03	12.80	0.50	0.24	0.78
7	26.10	622.00	55.70	35.50	19.10	27.90	133.00	331.00	98.60	108.00	12.80	10.20	3.34	10.60	0.53	0.33	0.78
8	68.70	612.00	58.90	35.40	24.80	45.60	184.00	325.00	108.00	118.00	16.00	16.80	3.29	12.60	0.53	0.30	0.70
9	9.61	788.00	49.20	20.00	20.80	13.90	144.00	237.00	85.60	32.60	2.43	11.00	3.41	10.20	0.30	0.61	0.86
10	26.20	780.00	43.30	30.60	21.40	31.00	157.00	321.00	79.70	107.00	11.80	10.30	3.05	8.66	0.41	0.29	0.72
11	31.50	656.00	52.70	38.20	20.80	34.60	160.00	266.00	104.00	110.00	13.70	11.60	3.68	10.60	0.41	0.35	0.75
12	37.00	662.00	57.80	36.10	25.90	47.00	170.00	338.00	98.40	123.00	16.00	15.10	3.68	13.40	0.51	0.29	0.68
13	45.00	674.00	52.30	25.70	20.70	33.70	122.00	390.00	88.30	86.20	12.20	10.80	2.55	10.90	0.58	0.30	0.72
14	32.90	645.00	64.40	35.10	23.80	43.60	151.00	378.00	95.40	104.00	15.70	13.00	4.12	12.30	0.59	0.34	0.69
15	61.30	821.00	51.10	37.70	28.70	42.60	201.00	481.00	86.20	113.00	16.30	16.10	4.10	11.80	0.59	0.33	0.67
16	50.50	725.00	55.70	32.10	23.80	31.30	164.00	483.00	94.20	99.90	14.30	13.90	3.70	11.70	0.67	0.32	0.75
17	39.70	581.00	59.80	40.10	23.40	43.20	149.00	231.00	91.20	118.00	13.90	12.20	3.58	12.10	0.40	0.34	0.68
18	14.40	696.00	25.60	14.70	22.40	14.80	146.00	149.00	40.00	88.60	7.14	14.70	4.54	9.06	0.21	0.17	0.73
平均值	44.77	688.00	52.16	31.77	23.37	33.64	165.56	331.89	92.58	108.52	13.27	13.25	3.34	11.63	0.48	0.31	0.74

样号	SiO₂	TiO₂	Al₂O₃	TFe₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	烧失量	Fe²⁺/Fe³⁺
1	60.52	0.80	17.35	5.18	2.97	0.10	2.02	0.93	1.69	4.78	0.21	6.53	1.76
2	58.41	0.65	16.07	8.04	5.53	0.34	1.62	1.09	1.69	2.76	0.30	9.43	3.24
3	56.43	0.60	16.24	8.26	5.53	0.57	1.72	1.25	1.27	2.58	0.44	11.01	2.90
4	63.77	0.82	16.16	4.15	2.92	0.04	1.58	0.88	1.96	3.15	0.18	7.40	3.58
5	64.90	0.58	13.72	5.75	3.95	0.26	1.59	0.96	1.51	2.69	0.19	8.09	3.22
6	58.74	0.63	15.60	7.02	4.68	0.39	1.85	1.60	1.35	3.01	0.53	9.52	2.86
7	62.12	0.62	11.77	6.42	4.85	0.41	2.13	3.15	0.85	1.88	0.82	10.17	5.22
8	60.70	0.66	16.15	6.30	4.63	0.22	1.76	1.14	1.47	3.17	0.22	8.51	4.45
9	66.87	0.65	13.70	3.53	0.54	0.05	1.34	1.94	2.32	3.91	0.15	5.40	0.20
10	65.50	0.62	13.77	5.07	3.55	0.13	1.91	1.55	1.90	3.30	0.22	6.20	3.50
11	65.12	0.55	12.80	5.56	4.27	0.38	1.82	1.34	1.25	2.82	0.29	8.33	5.81
12	60.76	0.78	17.30	5.44	3.72	0.08	2.18	1.41	1.92	3.52	0.19	6.54	3.16
13	61.14	0.58	14.01	6.13	4.90	0.23	1.75	2.45	1.95	2.98	0.23	8.87	7.94
14	61.42	0.74	16.66	5.74	4.04	0.07	1.92	1.75	2.17	3.28	0.22	6.26	3.59
15	62.72	0.84	18.71	2.82	2.16	0.03	1.38	1.31	2.32	5.07	0.30	4.49	5.71
16	61.21	0.74	15.95	5.12	4.31	0.07	1.60	1.96	1.97	4.10	0.25	7.26	14.44
17	61.95	0.72	15.44	5.96	4.49	0.15	1.88	1.43	1.82	3.04	0.20	7.69	5.13
18	68.26	0.46	14.86	4.22	3.10	0.07	1.90	1.06	0.95	3.77	0.15	4.43	4.44
平均值	62.25	0.67	15.35	5.60	3.90	0.20	1.78	1.51	1.69	3.32	0.28	7.56	4.51