河南省泌阳凹陷安棚地区古近系核桃园组含碱地层层序特征及其意义

doi:10.7605/gdlxb.2016.01.007

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Abstract

Biyang sag,located in the southeast margin of the Nanxiang Basin,is a continental faulted basin and shallower in the northwest than in the southeast. In the central part of Anpeng area,dolostones with huge thickness developed in the Paleogene. The main ore deposits occurred in the upper Member 3 and the lower Member 2 of the Hetaoyuan Formation,and is closely related to dolomitic strata. Based on cores,logging and seismic data,the alkaline rock series stratum of the Paleogene Hetaoyuan Formation can be divided into three second-order cycles,and further can be divided into eight third-order cycles. The trona ore seam is located at the top of the basic sequence and the upper parts of the second-order cycle or third-order cycle,and the alkali rock stratigraphic sequence varies regularly from the laminated dolostone to the trona ore seam. According to trona ore seam vertical change rule, prospecting prediction and predicting seam position in drilling have made good effect. And according to the research of the salt mineral depositional cycle,there may be a potassic salt at the top of the first-order cycle,which indicates the possibility of discovery of potash deposits.

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	Yi Chenglong

Key words： Biyang sag Anpeng area Paleogene Hetaoyuan Formation trona ore

Received: 29 November 2014 Published: 01 February 2016

ZTFLH:

P619.2

About author: About the author：Yi Chenglong,born in 1969,graduated from Changchun Geological University in 1990. Now he is a senior geological engineer,and mainly engaged in geological and mineral exploration work. E-mail: yclycl22@sina.com.

Cite this article:

Yi Chenglong. Sequence stratigraphy characteristics and its significance of alkaliferous strata of the Paleogene Hetaoyuan Formation in Anpeng area,Biyang sag in Henan Province[J]. JOPC, 2016, 18(1): 93-100.

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http://journal09.magtechjournal.com/gdlxb/EN/10.7605/gdlxb.2016.01.007 OR http://journal09.magtechjournal.com/gdlxb/EN/Y2016/V18/I1/93

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