Geochemical Characteristics of the Cretaceous Yixian Formation Mudstones in Xiushui Basin of Northern Liaoning and Their Geological Significance

doi:10.19657/j.geoscience.1000-8527.2019.02.04

Abstract

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

CLC Number:

P588.22

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.

Figures/Tables 11

References 31

[1]	陈树旺, 丁秋红, 郑月娟, 等. 松辽盆地外围新区、新层系——油气基础地质调查进展与认识[J]. 地质通报, 2013,32(8):1147-1158.
[2]	丁秋红, 陈树旺, 李晓海, 等. 辽宁北部秀水盆地秀 D1井孢粉组合及其地层意义[J]. 地质通报, 2017,36(8):1305-1318.
[3]	姚玉来, 李晓海, 司江福, 等. 辽宁北部秀水盆地秀 D1井烃源岩评价[J]. 地质与资源, 2018,27(2):186-191.
[4]	孙鹏, 唐友军, 张健, 等. 松辽盆地南部秀水断陷油砂地球化学特征[J]. 地质论评, 2017,63(增刊1):131-132.
[5]	HASKIN M A, HASKIN L A. Rare earths in European shales: A redetermination[J]. Science, 1966,154:507-509.
[6]	WALKER C T, PRICE N B. Departure curves for computing paleosalinity from boron in illites and shales[J]. AAPG, 1963,47(5):833-841.
[7]	COUCH E L. Calculation of paleosalinities from boron and clay mineral data[J]. AAPG, 1971,55(10):1829-1837.
[8]	李成凤, 肖继风. 用微量元素研究胜利油田东营盆地沙河街组的古盐度[J]. 沉积学报, 1988,6(4):100-107.
[9]	邓宏文, 钱凯. 沉积地球化学与环境分析 [M]. 兰州: 甘肃科学技术出版社, 1993: 1-154.
[10]	ELDERFIELD H, GREAVES M J. The rare earth elements in seawater[J]. Nature, 1982,296:214-219. DOI URL
[11]	FRANCOIS R. A study on the regulation of the concentrations of some trace metals(Rb, Sr, Zn, Cu, Ni, Mn, and Mo) in Saanich Inlet Sediments, British Columbia,Canada[J]. Marine Geology, 1988,83(1):285-308. DOI URL
[12]	RUSSELL A D, MORFORD J L. The behavior of redox-sensitive metals across a laminated-massive-laminated transition in Saanich Inlet, British Columbia[J]. Marine Geology, 2001,174(1/4):341-354. DOI URL
[13]	TRIBOVILLARD N, ALGEO T J, LYONS T, et al. Trace metals as paleoredox and paleoproductivity proxies: An update[J]. Chemical Geology, 2006,232(1/2):12-32. DOI URL
[14]	张天福, 孙立新, 张云, 等. 鄂尔多斯盆地北缘侏罗纪延安组、直罗组泥岩微量、稀土元素地球化学特征及其古沉积环境意义[J]. 地质学报, 2016,90(12):3454-3472.
[15]	JONES B, MANNING D A C. Comparison of geochemical indices used for the interpretation of paleoredox conditions in ancient mudstones[J]. Chemical Geology, 1994,111(1/4):111-129. DOI URL
[16]	梅水泉. 岩石化学在湖南前震旦系沉积环境及铀来源研究中的应用[J]. 湖南地质, 1988(3):27-33.
[17]	杨江海, 杜远生, 朱杰. 甘肃景泰崔家墩下奥陶统阴沟组砂岩化学组分特征及物源区构造背景判别[J]. 古地理学报, 2007,9(2):197-206. DOI URL
[18]	ROSER B P, KORSCH R J. Determination of tectonic setting of sandstone-mudstone suites using SiO₂ content and K₂O/Na₂O ratio[J]. The Journal of Geology, 1986,94(5):635-650. DOI URL
[19]	雷开宇, 刘池洋, 张龙, 等. 鄂尔多斯盆地北部侏罗系泥岩地球化学特征:物源与古沉积环境恢复[J]. 沉积学报, 2017,35(3):621-636.
[20]	BHATIA M R. Rare earth element geochemistry of Australian Paleozoic graywackers and mudrocks: provenance and tectonic control[J]. Sedimentary Geology, 1985,45(1/2):97-113. DOI URL
[21]	胡俊杰, 李琦, 方念乔, 等. 藏北羌塘盆地中央隆起带下二叠统展金组沉积岩稀土元素地球化学特征及其地质意义[J]. 古地理学报, 2014,16(6):926-934. DOI URL
[22]	BHATIA M R, CROOK K A W. Trace element characteristics of graywackers and tectonic setting discrimination of sedimentary basins[J]. Contributions to Mineralogy and Petrology, 1986,92(2):181-193. DOI URL
[23]	毛光周, 刘池洋. 地球化学在物源及沉积背景分析中的应用[J]. 地球科学与环境学报, 2011,33(4):337-348.
[24]	张金亮, 张鑫. 塔中地区志留系砂岩元素地球化学特征与物源判别意义[J]. 岩石学报, 2007,23(11):2990-3002.
[25]	侯伟, 刘招君, 王伟涛, 等. 黑龙江省东部绥滨坳陷下白垩统泥岩稀土元素地球化学特征[J]. 古地理学报, 2007,9(3):207-215.
[26]	ALLEGRE C J, MINSTER J F. Quantitative models of trace element behavior in magmatic processes[J]. Earth and Planetary Science Letters, 1978,38(1):1-25. DOI URL
[27]	刘英俊, 曹励明. 元素地球化学导论[M]. 北京: 地质出版社, 1987: 57-80.
[28]	杨国臣, 于炳松, 陈建强, 等. 川西前陆盆地上侏罗统—白垩系泥质岩稀土元素地球化学[J]. 现代地质, 2010,24(1):140-150.
[29]	陈有炘, 裴先治, 李瑞保, 等. 东昆仑东段纳赤台岩群变沉积岩地球化学特征及构造意义[J]. 现代地质, 2014,28(3):489-500.
[30]	曹花花. 华北板块北缘东段晚古生代—早中生代火成岩的年代学与地球化学研究[D]. 长春:吉林大学, 2013: 113-128.
[31]	唐杰, 许文良, 王枫, 等. 古太平洋板块在欧亚大陆下的俯冲历史:东北亚陆缘中生代—古近纪岩浆记录[J]. 中国科学:地球科学, 2018,48(5):549-583.

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