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ANALYSIS OF THE SEDIMENTARY ENVIRONMENT AND DISCUSSION OF THE STRUCTURAL SETTING OF THE JURASSIC LONGSHAN FORMATION IN THE SOUTHERN KUNLUN OF GELA
Author(s): 
Pages: 17-23
Year: Issue:  1
Journal: GEOLOGY OF SHAANXI

Keyword:  侏罗纪龙山组礁灰岩火山岩浅海台地相伸展环境;
Abstract: 在开展1:25万<康西瓦>、<岔路口>等四幅区域地质调查过程中,在岔路口及鸡冠石一带相继发现了侏罗纪基-酸性火山岩及发育完好的礁灰岩、硅质岩.依据灰岩中广泛发育的鲕粒构造、生物碎屑灰岩及礁灰岩,初步确定龙山组为一套滨-浅海台地相碳酸盐岩;通过构造环境分析,针对侏罗系龙山组中发育大量的基性火山岩,对前人认为是前陆盆地构造环境的观点提出质疑,并依据岩石组合、沉积相,结合该套地层呈大规模带状展布的特征,认为其形成于伸展构造环境.
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