摘要
了解准噶尔盆地五彩湾地区地层、褶皱、断裂、砂体等砂岩铀成矿环境,对于该区铀资源的预测评价具有重要意义。针对该区以往方法构造探测和砂体解释精度较低等不足,利用二维地震勘探技术开展铀成矿环境探测试验研究。在以往技术方法的基础上,通过试验研究改进了相关技术,建立了适用于准噶尔盆地五彩湾地区的基于可控震源的砂岩型铀矿地震数据采集方法、针对性强的地震数据处理技术流程、基于线性拟合声波重构技术的地震反演砂体识别方法;据此基本查明了该区"沙丘河背斜、芦草沟向斜、火烧山背斜、西大沟向斜、帐篷沟背斜"的褶皱形态、火烧山背斜两翼存在控矿断裂分布以及目标层砂体发育特征等,并预测了1片成矿有利区。表明利用建立和改进的准噶尔盆地砂岩型铀矿地震勘探技术可较好地解决该区铀成矿环境探测问题。
The study of the ore-forming environments of sandstone-type uranium,such as strata,folds,fractures and sand bodies,is significant for predicting and evaluating the uranium resource in Wucaiwan area of Junggar Basin.The technology of the two-dimensional seismic exploration was used to detect the ore-forming environment of sandstone-type uranium deposits for the first time and to tackle the problem that the traditional methods have low accuracy in surveying the structures and interpreting the sands in this area.On the basis of the previous methods,the related technology was improved through experimental research,a seismic data acquisition method based on vibroseis for sandstone-type uranium deposits in Junggar Basin was set up,a set of processing flow for the seismic data characteristics in the area was established,and the method for identifying the sand body was founded based on the seismic inversion technique of linear quasi-acoustic reconstruction.On such a basis,the fold morphology of"Shaqiuhe anticline,Lucaogou syncline,Huoshaoshan anticline,Xidagou syncline and Zhangpenggou anticline"in this area was basically ascertained.It is found that there exist ore-controlling fractures in the two wings of the Huoshaoshan anticline,and there exist the developing characteristics of sand bodies in target beds;meanwhile,an ore-forming favorable area was predicted.In conclusion,the established and improved seismic exploration technology for sandstone-type uranium deposits in the Junggar Basin can solve the problem of detecting the metallogenic environment of uranium deposits in this area.
作者
吴曲波
曹成寅
李子伟
WU Qu-Bo;CAO Cheng-Yin;LI Zi-Wei(Beijing Research Institute of Uranium Geology,Beijing 100029,China;CNNC Key Laboratory of Uranium Exploration and Evaluation Technology,Beijing 100029,China)
出处
《物探与化探》
CAS
CSCD
北大核心
2018年第6期1134-1143,共10页
Geophysical and Geochemical Exploration
基金
中核集团"龙灿"示范工程科研项目(第二阶段)(中核科发[2018]111号)
关键词
准噶尔盆地
五彩湾地区
砂岩型铀矿
成矿环境
地震勘探技术
Junggar Basin
Wucaiwan area
sandstone type uranium deposits
metallogenic environment
seismic exploration technique
