四川盆地震旦系、塔里木盆地志留系深部热液与伊犁盆地侏罗系表生热液对比研究

发布时间：2018-06-18 19:06

本文选题：川东南地区 + 塔里木盆地　；参考：《成都理工大学》2017年硕士论文

【摘要】：本论文以受深部热液影响的四川盆地东南部的震旦系白云岩、塔里木盆地志留系碎屑岩及受表生热液影响的伊犁盆地侏罗系碎屑岩为研究对象,通过对川东南地区林1井灯影组白云岩岩性特征、深部热液对白云岩影响分析、塔里木盆地柯坪塔格组碎屑岩胶结物特征、伊犁盆地侏罗系表生热液的产生与运移等方面对比研究后,总结了深部热液对白云岩及碎屑岩改造特点,表生热液的产生运移成矿情况。取得了以下的主要研究成果:川东南地区灯影组白云岩以原生晶粒白云岩为主,受热液影响明显。热液白云石岩石学特征明显。经过电子探针分析,初步了解了热液白云石形成过程中各元素的变化,并发现在热液白云石形成期间发生了数次不同性质的深部热液流体侵入。塔里木盆地柯坪塔格组碎屑岩胶结物中可见多种高温和低温热液矿物组合。研究认为柯坪塔格组碎屑岩地层的碳酸盐矿物形成受热液控制。经过对地质资料、前人研究的总结及岩心的宏微观特征,发现中1井有高温炙烤痕迹,并推测热液溶蚀应发生在二叠纪火山活动期,可形成有利储层。伊犁盆地侏罗系表生热液是刚提出不久的新概念。干旱气候下的自燃煤层在气候转变为湿润气候时,可形成表生热液,流动途径主要是渗透性砂岩层。煤层上红色砂岩是中高温热液影响的结果,白色砂岩为较低温热液影响结果。研究提出了表生热液的影响因素。表生热液与深部热液成因不同,故而性质也不同,对于围岩的改造也不同。深部热液形成于深部的高温流体活动,其热液的主要热源为深部构造热事件提供,流动主要受深部断层等通道控制。表生热液热量来源于煤层自燃,具地表较近,流动受限于渗透性砂岩层顶底板等。
[Abstract]:In this paper, the Sinian dolomite in the southeast of Sichuan Basin, Silurian clastic rock in Tarim Basin and Jurassic clastic rock in Yili Basin affected by deep hydrothermal solution are taken as the research objects. By analyzing the lithologic characteristics of dolostone in Dengying formation of well Lin 1 in southeast Sichuan and the influence of deep hydrothermal solution on dolomite, the cementation characteristics of clastic rocks of Kepingtag formation in Tarim Basin are analyzed. After a comparative study on the generation and migration of Jurassic supergenetic hydrothermal in Yili Basin, the characteristics of deep hydrothermal transformation to dolomite and clastic rock, and the formation, migration and mineralization of supergenetic hydrothermal are summarized. The main results are as follows: the dolomite of Dengying formation in southeast Sichuan is dominated by primary grain dolomite, which is obviously influenced by hydrothermal solution. The petrological characteristics of hydrothermal dolomite are obvious. The changes of various elements in the formation of hydrothermal dolomite were preliminarily understood by electron probe analysis, and it was found that during the formation of hydrothermal dolomite, a number of deep hydrothermal fluid intrusions of different properties took place. Various high and low temperature hydrothermal mineral assemblages can be found in clastic rock cementation of Kepingtag formation in Tarim Basin. The formation of carbonate minerals in clastic strata of Kepingtag formation is controlled by hydrothermal solution. Based on the geological data, the summary of previous studies and the macro and micro characteristics of the cores, it is found that there are high temperature scorching traces in well Zhong1, and it is speculated that hydrothermal dissolution should occur in the Permian volcanic active period, which can form favorable reservoir. The epigenetic hydrothermal system of Jurassic in Yili Basin is a new concept that has just been put forward. The spontaneous combustion coal seams in arid climate can form supergenetic hydrothermal fluid when the climate changes to humid climate, and the flow path is mainly permeable sandstone beds. The red sandstone in coal seam is the result of medium and high temperature hydrothermal effect, and the white sandstone is the result of lower temperature hydrothermal effect. The influencing factors of supergenic hydrothermal solution were studied. The origin of supergenetic hydrothermal fluid is different from that of deep hydrothermal solution, so its properties are different, and the reconstruction of surrounding rock is also different. The deep hydrothermal fluid is formed in the deep high temperature fluid. The main thermal source of the hydrothermal fluid is the deep tectonic thermal event, and the flow is mainly controlled by the deep fault and other channels. The supergene hydrothermal heat comes from spontaneous combustion of coal seam, which is near the surface, and the flow is limited by the roof and bottom plate of permeable sandstone bed.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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