Tectono-sedimentary setting of the Po Plain and Adriatic foreland
Tectono-sedimentary setting of the Po Plain and Adriatic foreland
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DOI：
10.1007/s12210-010-0102-4
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发表时间：
2010-12-01
影响因子：
2
通讯作者：
Franciosi, R.
中科院分区：
文献类型：
--
作者：
Fantoni, R.;Franciosi, R.
基于60年油气勘探历史中大量的钻井和2D/3D地震控制成果，详细重建了由南阿尔卑斯、迪纳里/阿尔巴尼亚和亚平宁链汇聚而成的亚德里亚板块前陆。8条连接相对带边缘的深度转换地震样带和3张演化的构造-沉积格架时标图说明了研究区浅层地壳几何结构和演化。其新生代挤压构造是叠印于中生代裂谷形成的晚二叠世至早白垩世伸展构造，并在某些地方受其强烈控制的结果。新生代缩短作用对前陆的影响时间不同，构造变形方向不同。从古新世到早中新世和更新世，迪纳尔链和阿尔巴尼亚链分别发生挤压作用。南高山西系和东系分别自早渐新世至迈西世和中新世至更新世起作用，亚平宁系自中新世中晚至更新世起作用。其结果是亚得里亚海前陆在始新世后的破碎化构造演化受历时链段活动及其同期竞争的双重控制。相反链段干扰的影响是一个由不同进化的前深组成的多系统，而不是完全由它们背后的链负荷控制。此外，前陆挠曲的时间和数量还伴随着横向正带的形成，起到了转移带的作用。
Based on the substantial drilling and 2D/3D seismic control achieved during a 60-year-long hydrocarbon exploration history, a detailed reconstruction of the Adria plate foreland shared by the converging Southalpine, Dinaric/Albanian and Apennines chains is presented. Eight depth converted seismic transects joining the opposing belt margins and three time-scaled maps of the evolving tectono-sedimentary framework illustrate the shallow crustal geometry and evolution of the study area. Its Cenozoic compressional architecture results overprinted to and somewhere strongly controlled by the late Permian to early Cretaceous extensional features generated during the Mesozoic rift. The effects of the Cenozoic shortening affected the foreland at different times and with variable directions of tectonic deformation. The Dinaric and Albanian chain compression operated since Paleocene to, respectively, early Miocene and Pleistocene. The western and eastern Southalpine comparts acted on the area since early Oligocene to Messinian and middle Miocene to Pleistocene, respectively, whereas the Apennines system involved it since middle-late Miocene to Pleistocene. The result is a fragmented post-Eocene tectonic evolution of the Adriatic foreland controlled by both the diachronous chain segment activity and their coeval competition. The effect of the opposite chain segment interference was a multiple system of differently evolving foredeeps not exclusively ruled by the chain load at their back. Time and amount of the foreland flexuring were moreover accompanied by formation of transversal positive belts that played the role of transfer zones.