摘要
QZ2006-40地震测线的构造变形样式及其平衡剖面缩短量分析表明,黔中隆起及邻区具有明显的分带性变形特征:自NW至SE依次可以划分为黔西北构造带、黔中构造带、麻江-凯里构造带、雪峰构造带,黔西北构造带的构造变形整体上以隔挡式褶皱及其组合为主,黔中构造带的构造变形样式以平缓的褶皱及其组合为主,麻江-凯里构造带以隔槽式褶皱及其组合为主,雪峰构造带以梵净山群、板溪群和南华系褶皱岩系变形为主。平衡剖面分析结果表明研究区经历了多期复杂的构造活动,不同构造带的缩短率揭示不同时期构造活动在不同带所表现的强度不同。总的来说,寒武纪以来麻江-凯里构造带构造活动最强烈,其次为黔中构造带,黔西北构造带构造活动最弱。整体体现出明显的分带性变形特征。
The structure styles shown in seismic line QZ2006-40 and the results from balanced section showed that the Qianzhong （Central Guizhou） and its adjacent areas have characteristics of zonation obviously, and 4 structural belts can be recognized as northwest Guizhou, Qianzhong, Majiang-Kaili, and Xuefeng tectonic belt. The main structural style in northwest Guizhou tectonic belt is ejective fold, Qianzhong tectonic belt has characteristics of broad fold, Majiang-Kail tectonic belt has characteristics of trough-like fold, and Xuefeng tectonic belt is mainly composed of folded rocks of Fanjingshan Group, Banxi Group and Nanhuan. The balanced section of QZ2006-40 seismic line showed that this area experienced multiphase complicated tectonic movements. The shortening ratio of different tectonic belt showed that these tectonic movements caused different effects on them. In general, the tectonic movement of Majiang-Kaili tectonic belt is most intensive, that of the Qianzhong is less intensive, and that of the northwest Guizhou tectonic belt is weakest, which show evident zonation.
出处
《地质学报》
CAS
CSCD
北大核心
2008年第3期316-320,共5页
Acta Geologica Sinica
基金
国家“973”计划项目(编号2005CB422107,G1999043305)
国家自然科学基金项目(编号40672143,40472107,40172076)
中石化勘探南方分公司项目(编号G0800-06-ZS-181)
中石化科技发展部项目(编号P05073)
石油天然气成藏机理教育部重点实验室开放基金项目(编号2003-01)联合资助的成果
