地球化学基因的构建与检验

doi:10.19657/j.geoscience.1000-8527.2020.049

现代地质 ›› 2020, Vol. 34 ›› Issue (05): 865-882.DOI: 10.19657/j.geoscience.1000-8527.2020.049

地球化学基因的构建与检验

龚庆杰¹(), 吴轩², 严桃桃³, 刘宁强¹, 李晓蕾², 李睿堃¹^,⁴, 刘梦翔¹^,⁵

1.中国地质大学(北京) 地球科学与资源学院,北京 100083
2.中国地质调查局发展研究中心,北京 100037
3.中国地质科学院地球物理地球化学勘查研究所,河北廊坊 065000
4.清华大学环境学院,北京 100084
5.广东省有色金属地质局九三五队,广东惠州 516000

收稿日期:2020-07-18 修回日期:2020-08-18 出版日期:2020-10-28 发布日期:2020-10-29
作者简介:龚庆杰,男,教授,博士生导师,1972年出生,地球化学专业,主要从事元素地球化学和勘查地球化学的教学与科研工作。Email: qjiegong@cugb.edu.cn。
基金资助:
国家重点研发计划重点项目(2017YFC0803807);中央高校基本科研业务费专项(2652018285);中央高校基本科研业务费专项(2652017221)

Construction and Test of Geochemical Genes: Case Studies in China

GONG Qingjie¹(), WU Xuan², YAN Taotao³, LIU Ningqiang¹, LI Xiaolei², LI Ruikun¹^,⁴, LIU Mengxiang¹^,⁵

1. School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China
2. Development and Research Center,China Geological Survey,Beijing 100037,China
3. Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang,Hebei 065000,China
4. School of Environment,Tsinghua University,Beijing 100084,China
5. Team 935 of Geology Bureau for Nonferrous Metals of Guangdong Province,Huizhou,Guangdong 516000,China

Received:2020-07-18 Revised:2020-08-18 Online:2020-10-28 Published:2020-10-29

摘要/Abstract

摘要：

地球化学基因是近年来提出的新技术。在分析地球化学基因构建方法的基础上提出了一种新的岩性地球化学基因LG01,并将早先提出的岩性地球化学基因命名为LG02,同时提出了两种稀土元素地球化学基因REEG01和REEG02。选择分别发育在广东连阳花岗岩体、广东佛冈花岗岩体、海南海口玄武岩、北京房山花岗闪长岩体上的4条风化剖面对岩性地球化学基因和稀土元素地球化学基因进行检验,结果发现岩石风化产物中的岩性基因和稀土元素基因均具有一定的稳定性,表现为稳定的遗传性和继承性;LG01岩性基因相对于LG02岩性基因具有更好的稳定性,REEG01稀土元素基因较REEG02稀土元素基因更稳定。建议将样品相对于中国酸性岩(由中国酸性岩元素丰度值代表的虚拟样品)的基因相似度称为酸性相似度,依据样品在LG01岩性基因方面的酸性相似度可将铝硅酸盐地质样品划分为类酸性成分、类基性成分和类中性成分3类(或类中酸性成分和类中基性成分两类)。从4个风化剖面样品及其表层土壤样品验证了LG01岩性基因的酸性相似度在物源示踪方面具有潜在应用价值。基于全国区域地球化学调查数据库和目标样品在不同地球化学基因中的相似度空间分析有可能实现对目标样品的溯源定位。

关键词: 地球化学基因, 风化剖面, 遗传性与继承性, 成分分类与物源示踪, 样品溯源

Abstract:

Geochemical gene is a new technique presented recently. According to the construction steps of a geochemical gene, a new lithogene called LG01 was presented and the early presented lithogene was named as LG02. Meanwhile, two rare earth element (REE) geochemical genes were also presented labeled as REEG01 and REEG02. These geochemical genes were tested on four weathering profiles which are LY18D06 profile developed over the Lianyang granite intrusion located in Guangdong Province, TT profile formed on the Fogang granite intrusion also in Guangdong Province, HK06 profile formed on the Neogene basalt in Hainan Province, and ZKD2 profile developed over a granodiorite intrusion in Beijing, China. The results indicate that lithogenes and REE genes are stable or have subtle differences in the weathered products. Furthermore, LG01 gene is more stable than LG02 gene and REEG01 gene is more stable than REEG02 gene in these weathering profiles. The sample’s gene similarity relative to the acidic rock in China (a virtual sample with the elemental abundance of acidic rocks in China) is called acidic similarity. According to the acidic similarities of LG01 gene, samples can be classified into three groups as acidic-like composition, intermediate-like composition, and basic-like composition (or two groups as intermediate-acidic-like composition and intermediate-basic-like composition). The acidic similarity of LG01 gene can be used as a tool to recognize the provenance of soils or weathered products tested on samples from the four weathered profiles. Based on the regional geochemical survey database and the geochemical gene techniques, (forensic) geological samples may be traced or located.

Key words: geochemical gene, weathering profile, heredity and inheritance, compositional classification and provenance tracing, sample traceability

中图分类号:

P595
P632

龚庆杰, 吴轩, 严桃桃, 刘宁强, 李晓蕾, 李睿堃, 刘梦翔. 地球化学基因的构建与检验[J]. 现代地质, 2020, 34(05): 865-882.

GONG Qingjie, WU Xuan, YAN Taotao, LIU Ningqiang, LI Xiaolei, LI Ruikun, LIU Mengxiang. Construction and Test of Geochemical Genes: Case Studies in China[J]. Geoscience, 2020, 34(05): 865-882.

图/表 7

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元素序号	岩性地球化学基因				稀土元素地球化学基因
	LG01^①		LG02^②		REEG01^③		REEG02^④
	元素	参考值	元素	参考值	元素	参考值	元素	参考值
1	Zr	147.0	Al₂O₃	11115.19	Pr	7.1	La	30
2	Ti	4 016	SiO₂	65.9	Nd	26	Ce	64
3	Al₂O₃	14.8	P	580	Sm	4.5	Pr	7.1
4	TFe₂O₃	6.4	Ti	3 000	Gd	3.8	Nd	26
5	SiO₂	60	La	30	Tb	0.64	Sm	4.5
6	P	756	TFe₂O₃	5	Dy	3.5	Eu	0.88
7	Pb	19	Th	10.7	Ho	0.8	Gd	3.8
8	Mn	940	Zr	190	Er	2.3	Tb	0.64
9	Th	5.72	Nb	12	Tm	0.33	Dy	3.5
10	Nb	14.5	Y	22	Yb	2.2	Ho	0.8
11	U	1.2	U	2.8	Lu	0.32	Er	2.3
12							Tm	0.33
13							Yb	2.2
14							Lu	0.32

元素序号	岩性地球化学基因				稀土元素地球化学基因
	LG01^①		LG02^②		REEG01^③		REEG02^④
	元素	参考值	元素	参考值	元素	参考值	元素	参考值
1	Zr	147.0	Al₂O₃	11115.19	Pr	7.1	La	30
2	Ti	4 016	SiO₂	65.9	Nd	26	Ce	64
3	Al₂O₃	14.8	P	580	Sm	4.5	Pr	7.1
4	TFe₂O₃	6.4	Ti	3 000	Gd	3.8	Nd	26
5	SiO₂	60	La	30	Tb	0.64	Sm	4.5
6	P	756	TFe₂O₃	5	Dy	3.5	Eu	0.88
7	Pb	19	Th	10.7	Ho	0.8	Gd	3.8
8	Mn	940	Zr	190	Er	2.3	Tb	0.64
9	Th	5.72	Nb	12	Tm	0.33	Dy	3.5
10	Nb	14.5	Y	22	Yb	2.2	Ho	0.8
11	U	1.2	U	2.8	Lu	0.32	Er	2.3
12							Tm	0.33
13							Yb	2.2
14							Lu	0.32

地球化学基因的构建与检验

Construction and Test of Geochemical Genes: Case Studies in China

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基因及相似度		中国酸性岩	中国中性岩	中国基性岩	中国土壤	中国水系沉积物	上陆壳
基因	LG01	10202020202	11111201112	12020202020	10112020202	10112020202	10202010202
	LG02	11012020211	11210202110	10210202200	11121011101	11121012110	11111111111
	REEG01	11111111111	11111111111	11111111111	11111111111	—	11111111111
	REEG02	11111121111111	11111201111111	11111201111111	11111111111111	—	11111111111111
相似度	LG01_R酸^①	100	45	0	90	90	95
	LG01_R中	45	100	55	55	55	50
	LG01_R基	0	55	100	10	10	5
	LG01_R土或水	90	55	10	100	100	85
	LG01_R上	95	50	5	85	85	100
	LG02_R酸	100	40	35	65	60	70
	LG02_R中	40	100	85	55	70	70
	LG02_R基	35	85	100	50	55	55
	LG02_R土	65	55	50	100	85	85
	LG02_R水	60	70	55	85	100	80
	LG02_R上	70	70	55	85	80	100
	REEG01_R^②100	100	100	100	100	—
	REEG02_R酸96	100	88	88	96	—
	REEG02_R中或基92	88	100	100	92	—
	REEG02_R土或上100	96	92	92	100	—

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