Geochemical Characteristics and Influencing Factors of Germanium in Surface Soil of Lishui District, Nanjing City

doi:10.19657/j.geoscience.1000-8527.2023.01.23

Abstract

Abstract:

Germanium (Ge) is an essential trace element for life and has extensive health care effects on the human body. It is valuable to develop Ge-rich soil, whereas the research on soil Ge is still insufficient in China.Based on the results of land quality geochemical survey in Lishui district, Nanjing, the content and spatial distribution characteristics of Ge in surface soil and the influence of geological background on soil Ge were studied in this paper.The results revealed that the average Ge content in surface soil of Lishui district was 1.40 mg/kg, which was mainly controlled by geological background and its spatial distribution was highly consistent with geological background.The high value area of Ge content is mainly the outlying area of J₃d^1-2, and the lithology is mainly trachyandensite and andesite, while the Quaternary sediment distribution area has relatively low Ge content.There was no significant relationship between Ge and pH value in the soil, there was a certain negative correlation with organic matter content, and an obvious positive correlation with Cr, Co, Ni and As. The Ge-rich soil area in the study area is 84.18 km², accounting for 10.84% of the total area of the whole region, and there is basically no Ge deficient area in the whole region.In this paper, the content, spatial distribution and influencing factors of Ge in surface soil of Lishui district, Nanjing were discussed, which can provide basic data for the ecological geochemical study of Ge in soil in China, and have guiding significance for the scientific development and utilization of Ge-rich soil resources.

Key words: germanium, soil, distribution characteristics, influencing factor, Lishui district, Nanjing

CLC Number:

P595
X142

ZHOU Mo, LIANG Xiaohong, ZHANG Ming, WEN Bangyong, TANG Zhimin, ZHAN Long. Geochemical Characteristics and Influencing Factors of Germanium in Surface Soil of Lishui District, Nanjing City[J]. Geoscience, 2023, 37(01): 217-226.

Figures/Tables 12

References 25

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序号	指标	分析方法	检出限	序号	指标	分析方法	检出限
1	Ge	AFS	0.1	10	N	VOL	20
2	AS	AFS	1	11	有机质	VOL	0.1^*
3	Hg	AFS	0.000 5	12	Cr	XRF	5
4	B	AES	1	13	Pb	XRF	2
5	Co	ICP-MS	1	14	Zn	XRF	4
6	Cd	ICP-MS	0.03	15	P	XRF	10
7	Ni	ICP-MS	2	16	K₂O	XRF	0.05
8	Mo	ICP-MS	0.3	17	Mn	XRF	10
9	pH	ISE	0.1^**

序号	指标	分析方法	检出限	序号	指标	分析方法	检出限
1	Ge	AFS	0.1	10	N	VOL	20
2	AS	AFS	1	11	有机质	VOL	0.1^*
3	Hg	AFS	0.000 5	12	Cr	XRF	5
4	B	AES	1	13	Pb	XRF	2
5	Co	ICP-MS	1	14	Zn	XRF	4
6	Cd	ICP-MS	0.03	15	P	XRF	10
7	Ni	ICP-MS	2	16	K₂O	XRF	0.05
8	Mo	ICP-MS	0.3	17	Mn	XRF	10
9	pH	ISE	0.1^**

参数	样本数/ 件	算术平均值/ (mg/kg)	最小值/ (mg/kg)	最大值/ (mg/kg)	中位数/ (mg/kg)	标准差	变异系数/ %
全区	8 280	1.41	0.70	6.21	1.39	0.20	14.18
剔除3倍标准差	8 215	1.40	0.83	2.01	1.39	0.14	10.00

参数	样本数/ 件	算术平均值/ (mg/kg)	最小值/ (mg/kg)	最大值/ (mg/kg)	中位数/ (mg/kg)	标准差	变异系数/ %
全区	8 280	1.41	0.70	6.21	1.39	0.20	14.18
剔除3倍标准差	8 215	1.40	0.83	2.01	1.39	0.14	10.00

地质单元	样品数/ 件	平均值/ (mg/kg)	标准差	变异系数/ %	最小值/ (mg/kg)	最大值/ (mg/kg)	岩性描述
第四系下蜀组Q₃x	6 692	1.39	0.14	10	0.70	3.68	下部为浅棕红色、棕黄色粉砂质黏土及粉砂和少量粗砂;上部为浅棕黄色、灰黄色粉砂层含铁锰小球,次为细砂及少量粗砂;底部有灰白色淋滤条纹和豆状铁锰质沉淀
白垩系葛村组K₁g	69	1.41	0.32	23	1.00	3.43	上部为紫红色、棕红色、灰黄色(井下微绿、灰黑色)泥岩、粉砂质泥岩夹泥质粉砂岩;下部为紫红色、灰黄色、灰白色(井下棕色、棕白色)细砂岩夹粉砂质泥岩、粉砂岩、砂砾岩、砾岩
白垩系姚家边组上段K₁y²	247	1.50	0.21	14	1.06	2.91	粗安质角砾岩
侏罗系大王山组上段J₃d²	131	1.52	0.34	23	1.01	4.18	粗安质、安山质火山岩
侏罗系大王山组下段J₃d¹	518	1.54	0.46	30	0.89	6.21	由辉石粗玄岩组成,中部为紫色的粗安岩,局部见有凝灰质粉砂岩
侏罗系龙王山组上段J₃l²	113	1.45	0.18	12	1.04	2.09	灰紫红色夹深灰色、黑灰色玄武安山岩,含角砾安山岩,夹凝灰角砾岩
侏罗系龙王山组下段J₃l¹	133	1.45	0.20	14	1.10	2.31	灰紫色、暗紫色玄武质安山角砾岩及集块岩
侏罗系西横山组J₃x	46	1.47	0.15	10	1.27	2.04	下段紫色、灰白色薄-厚层石灰质砾岩、砂砾岩、长石石英砂岩夹钙质砂岩;上段红色、灰色薄-厚层含砾中粗粒长石石英砂岩、粉砂岩、泥岩、泥灰岩不等厚互层,夹砂砾岩透镜体
燕山期粗安斑岩ταπ	70	1.47	0.21	14	1.04	2.48	粗安质闪长斑岩