干旱区生态环境知识资源中心(Arid): 川东北早-中三叠世聚盐环境及海水浓缩成钾模式

Arid

	川东北早-中三叠世聚盐环境及海水浓缩成钾模式
其他题名	Evaporatic environment and the concentration model of potash in the Early-Middle Triassic,northeastern Sichuan Basin
	陈安清 1; 王立成 2; 姬广建 1; 曹珂 3; 徐胜林 1; 唐文斌 1
来源期刊	岩石学报
ISSN	1000-0569
出版年	2015
卷号	31 期号:9 页码:2757-2769
中文摘要	川东北地区中下三叠统海相含蒸发岩地层是近十年来油气勘探开发的重点区域,但对其中的蒸发岩沉积序列研究较少,对含钾蒸发岩系的分布规律还不清楚。本文以气钾兼探为指导思想,在钻井岩心、野外露头和大量钻测井资料的基础上,开展了川东北中-下三叠统层序岩相古地理、蒸发岩分布特征和成钾条件研究,结果显示:嘉陵江组沉积时期,蒸发岩明显受三级海平面升降变化的控制,主要发育于高位体系域,即层序SQ1高位期沉积的嘉二段和层序SQ2高位期沉积的嘉四、五段;雷口坡组沉积时期则主要受上扬子区域构造体制转换的控制,盆地整体抬升及周缘古陆或古隆起的形成,造成该时期总体为相对局限的沉积环境,海侵体系域和高位体系域的蒸发岩分布没有明显差别,都有膏盐层发育,且厚度都较小;川东北早-中三叠世在克拉通浅水环境碳酸盐岩局限台地、低纬度温暖干旱气候、海平面下降的联合控制下,海水向中心浓缩咸化,在宣汉-达州地区形成浓缩咸化中心,是最有利的找钾地区。
英文摘要	The Lower-Middle Triassic marine evaporatic-bearing sequences in the northeastern Sichuan Basin received much attention in the petroleum exploration. However,little research was focused on the evaporatic sequences and thus the distribution regularities about potash-bearing sequences are poorly constrained. Based on drilling core,outcrop,and logging data,sequence-based lithofacies-paleogeography,evaporite distribution and conditions for potash formation of the Lower-Middle Triassic in northeastern Sichuan Basin were performed. The results show that evaporite of Jianglingjiang Formation was affected by third order sea-level change obviously and developed mainly in the high system track,corresponding to T_2 j~2 of the SQ1’s HST and T_2 j~(4 + 5) of the SQ2’s HST; The evaporites of the Leikoupo Formation was controlled by tectonic regime change of the Yangtze Block leading to basin uplift integrally and formation of palaeo-land or palaeo-uplift,then restricted environment was formed. Therefore,evaporite distribution bears no obvious difference in TST and HST. Under combined control of carbonate restricted platform of craton shallow marine environment,warm and arid climate in low latitude and falling of sea level,sea water concentrated and salinized centripetally. Xuanhan-Dazhou area is the salinization center,as well as the favorable exploration zone for potash salts.
中文关键词	钾盐 ; 层序岩相古地理 ; 浓缩模式 ; 四川盆地 ; 早中三叠世
英文关键词	Potash salts Sequence-based lithofacies-paleogeography Concentration Model Sichuan Basin Early-Middle Triassic
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:5517916
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233547
作者单位	1.成都理工大学沉积地质研究院, 成都, 四川 610059, 中国; 2.中国地质科学院矿产资源研究所, 国土资源部成矿作用与资源评价重点实验室, 北京 100037, 中国; 3.青岛海洋地质研究所, 国土资源部海洋油气资源与环境地质重点实验室, 青岛, 山东 266071, 中国
推荐引用方式 GB/T 7714	陈安清,王立成,姬广建,等. 川东北早-中三叠世聚盐环境及海水浓缩成钾模式[J],2015,31(9):2757-2769.
APA	陈安清,王立成,姬广建,曹珂,徐胜林,&唐文斌.(2015).川东北早-中三叠世聚盐环境及海水浓缩成钾模式.岩石学报,31(9),2757-2769.
MLA	陈安清,et al."川东北早-中三叠世聚盐环境及海水浓缩成钾模式".岩石学报 31.9(2015):2757-2769.