Model and application of deducing geological body on regional geochemical survey data: A case study on granitic intrusions in China

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质调查局发展研究中心

	Model and application of deducing geological body on regional geochemical survey data: A case study on granitic intrusions in China
	Xiang YunChuan 4; Gong QingJie 1; Liu RongMei ; Yang WanZhi 2
刊名	ACTA PETROLOGICA SINICA
	2014
卷号	30 期号:9 页码:2609-2618
关键词	Regional geochemical survey Deducing model Granitic intrusion Geochemical province Geochemical Map in China
ISSN号	1000-0569
英文摘要	The geochemical survey data obtained by the RGNR (Regional Geochemistry-National Reconnaissance) project are useful for basic geology research and mineral exploration. Based on the China's National Geochimical Mapping, five geochemical domains (Pal-Asia geochemical domain, Qingling-Qilian-Kunlun geochemical domain, Tethys geochemical domain, Yangtze geochemical domain and Marginal Pacific geochemical domain respectivelly) and 25 geochemical provinces are divided in Chinese land surface. In the western of Yunnan Province, granitic intrutions occurring in arc belt clearly are rich in K2O, Th, U, La, Y, Zr, but poor in Co, Ni, V, Cr, Ti, and Fe2O3. Geochemical survey data in the western of Yunnan Province are precessed on the main component factor analysis method and two main factors are selected. One or F2 represents the element assemblage of Th, Y, U, Zr, La, K2O, Al2O3, and Be, which factor score is calculated as F2 = 0. 87Th + 0. 86Y + 0. 77U + 0. 77Zr + 0. 67La + 0. 61K(2)O + 0. 58Al(2)O(3) + 0. 53Be. The other or F1 represents the element assemblage of Fe2O3, Ti, V, Co, Cr, and Ni, which factor score is F1 = 0. 95Fe(2)O(3) + 0. 93V + 0. 93Ti + 0. 92Co + 0. 81Cr + 0. 80Ni. The ratio of these two factor scores is used to deduce the granitic intrusions. The drawing methods of geochemical map and geochemical anomaly map are presented which are used commonly in the RGNR project. The areas of F2/F1 with high values and the anomaly areas of F2/F1 coincide well with the outcrops of granitic intrusions in the western of Yunnan Province. The deducing model to recognize granitic intrusions based on geochemical survey data in the western of Yunnan Province is fulfilled in the Chinese land surface with ca.7 million square kilometers. The middle part of South China is selected to test and apply the deducing model. The results indicate that the anomaly areas of the factor score ratio F2/F1 are consistent well with the outcrops of granitic intrusions in the middle part of South China, especially in the boundary areas of Hunan Province, Guangdong Province and Guangxi Zhuang Autonomous Region. This consistence indicates that the deducing model is feasible to recognize granitic intrusions. This model will play an important potential role on basic geology research in China.
学科主题	地球化学勘查
WOS关键词	AILAOSHAN OROGENIC BELT ; GOLD DEPOSIT ; SOUTHWEST CHINA ; TRACE-ELEMENTS ; MINERALIZATION ; ANOMALIES ; PROVINCE ; EVENTS ; METALS ; YUNNAN
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000343530900012
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40340]
专题	中国地质调查局发展研究中心
作者单位	1.China Geol Survey, Ctr Res & Dev, Beijing 100037, Peoples R China 2.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 3.Xinjiang Inst Geol Survey, Urumqi 830000, Peoples R China 4.中国地质调查局发展研究中心
推荐引用方式 GB/T 7714	Xiang YunChuan,Gong QingJie,Liu RongMei,et al. Model and application of deducing geological body on regional geochemical survey data: A case study on granitic intrusions in China[J]. ACTA PETROLOGICA SINICA,2014,30(9):2609-2618.
APA	Xiang YunChuan,Gong QingJie,Liu RongMei,&Yang WanZhi.(2014).Model and application of deducing geological body on regional geochemical survey data: A case study on granitic intrusions in China.ACTA PETROLOGICA SINICA,30(9),2609-2618.
MLA	Xiang YunChuan,et al."Model and application of deducing geological body on regional geochemical survey data: A case study on granitic intrusions in China".ACTA PETROLOGICA SINICA 30.9(2014):2609-2618.