摘要
震积岩是古地震事件的重要记录,依托大比例尺区域地质调查,在滇西楚雄盆地西侧陆相红层冯家河组中识别出一套陆相震积岩体系。通过对宏观露头和岩石薄片微观观察,总结了该套地层的震积岩标志,主要包括微断裂、震褶岩、液化变形构造、砂岩脉、沙火山、负荷构造、火焰构造、枕状构造、球状构造、角砾岩化、地裂缝等原地相的震积构造及震浊积岩、震积泥石流等异地相震积岩。综合地层柱状结构图,建立了冯家河组陆相震积岩垂向震积岩结构序列。冯家河组震积岩的发现对研究楚雄盆地构造演化具有重要意义,并为楚雄盆地油气勘探提供了地质依据。
Seismites constitute the important recorder of ancient earthquake. By the observation of sheet geological survey and the studies of thin section, the seismites were recognized in Fengjiahe Formation, West Chuxiong Basin. The syn-sedimentary deformation serves as the main marker, the seismic structure of the in-situ phase includes such factors as stepmicro-faults, seismo-folds, fluidized soft structures, fluidized veins, sandy volcano, load casts, flame structures, pillow structures, ball structures, brecciation, seistoo-cracks, whereas the dissimilarly seismites include seismoturbidite and debris flow rocks. Shock fold rock, vibrational liquefaction clay veins, flame structure, convolution beddings and pinch and swell structures. Through the study of stratigraphic column, seismite sequence was put forward. The establishment of Fengjiahe Formation seismites has important significance for the study of tectonic evolution in Chuxiong Basin, and can provide important foundation for the exploration of oil-gas in Chuxiong Basin.
作者
曾文涛
刘桂春
马进华
孙柏东
王晓林
陈光艳
何兆荣
张虎
ZENG Wentao;LIU Guichun;MA Jinhua;SUN Baidong;WANG Xiaolin;CHEN Guangyan;HE Zhaorong;ZHANG Hu(Yunnan Institute of Geological Survey,Kunming 650216,Yunnan,China;Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization,Ministry of Natural Resources,Kunming 650061,Yunnan,China)
出处
《地质通报》
CAS
CSCD
北大核心
2018年第11期1997-2006,共10页
Geological Bulletin of China
基金
中国地质调查局项目<云南区域地质调查片区总结与服务产品开发>(编号:DD20160345-02)
<云南1:5万二街
易门
鸣矣河
上浦贝幅区域地质调查>(编号:DD20160017)
国家自然科学基金项目<滇西南原特提斯及其与古特提斯演化关系研究>(批准号:41672222)
云南省科技领军人才培养计划项目<西南"三江"叠合成矿作用与成矿预测>(编号:2013HA001)
关键词
震积岩
软沉积变形
楚雄盆地西缘
冯家河组
seismites
syn-sedimentary deformation
west Chuxiong Basin
Fengjiahe Formation
