松辽盆地南部中央凹陷区姚家组砂岩地球化学特征及沉积物源

doi:10.13686/j.cnki.dzyzy.2021.05.004

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Abstract The sediment provenance is of indicative significance to study the distribution of uranium sand body and migration channel of uranium fluid. Taking the Yaojia Formation in Central Depression of southern Songliao Basin as object, based on the systematic geochemical testing of sandstone samples and collected data of neighboring Qianjiadian uranium deposit, the paper discusses the geochemistry, formation environment and sediment provenance of sandstone of Yaojia Formation and compares with those in Qianjiadian area. The results show that the sandstone detrital of Yaojia Formation is relatively rich in Si and Al, with the main rock types of lithic sandstone and arkose. The REE content is 160.12×10^-6-253.74×10^-6, characterized by enriched LREEs (La, Ce, Pr, etc.), flat HREEs (Ho, Er, Tm, Yb and Lu) and moderate negative Eu anomaly. The analysis of major, trace and rare earth elements reveal that the sandstone was formed in arid-semiarid climate, without high degree of chemical alteration, and the tectonic setting of provenance is active continental margin. Combined with the regional tectonic background, it is considered that the provenance component of the study area is similar to that of Qianjiadian area, but the source directions are different. The parent material for sandstone detrital of Yaojia Formation in the study area is derived from the northeast or southwest provenance, with the main source rocks of granodiorite and granite.

Key words： petrogeochemistry sediment provenance Yaojia Formation uranium deposit Songliao Basin

Received: 12 August 2021

PACS:	P595
	P619.14

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	Articles by authors
	ZHANG Sen
	LIU Chao
	HU Hui-ting
	LI Jun-hui
	SHI Lei
	BUHE Bateer

Cite this article:

ZHANG Sen,LIU Chao,HU Hui-ting等. GEOCHEMISTRY AND SEDIMENT PROVENANCE OF SANDSTONE FROM YAOJIA FORMATION IN CENTRAL DEPRESSION, SOUTHERN SONGLIAO BASIN[J]. GEOLOGY AND RESOURCES, 2021, 30(5): 544-554.

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http://manu25.magtech.com.cn/Jweb_dzyzy/EN/10.13686/j.cnki.dzyzy.2021.05.004 OR http://manu25.magtech.com.cn/Jweb_dzyzy/EN/Y2021/V30/I5/544

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