Structural inheritance in the Chukchi shelf, Alaska
Structural inheritance in the Chukchi shelf, Alaska
复制标题
阿拉斯加楚科奇陆架的结构继承
DOI：
10.1016/j.marpetgeo.2022.105812
复制
发表时间：
2022
影响因子：
4.2
通讯作者：
Houseknecht, David W.
中科院分区：
文献类型：
--
作者：
Connors, Christopher D.;Houseknecht, David W.
对来自美国楚科奇大陆架的超过100，000行-公里的重新处理的2D、时间迁移、地震反射数据的解释记录了过去4亿年中至少4次构造事件。产生了独特的遗传结构。一个分层良好的经济基底，其内部几何形状清楚地定义了一个前密西西比，薄皮褶皱和冲断带代表了该地区最早的可识别的构造作用，一个容纳东西（今天的坐标）缩短，可能在泥盆纪。(1)第一个反转事件和楚科奇大陆架的主要地壳特征是汉纳海槽，这是一个南北走向的断裂系统，容纳了10多公里的石炭-侏罗纪同裂谷和裂谷后（凹陷）地层。前密西西比期收缩组构对前造山带石炭纪伸展塌陷形成汉纳海槽的影响是不均匀的。许多裂谷期正断层沿着前密西西比逆冲断层分离，形成独特的合成生长地层，限制了伸展的几何形状。其他正断层穿过前密西西比地层，在生长地层中显示出更典型的翻转几何形状，在更多分布的负反转中切割前裂谷地层中的收缩构造。(2)经过一段时间的宾夕法尼亚州到早侏罗世的沉降，在楚科奇大陆架的中南部，几个南北向的裂谷期正断层在晚侏罗世到早白垩世的第二次事件中反转，形成了局部的、不对称的、正反转的构造，这是由于东西向的缩短，可能与楚科奇造山带的远场效应有关。然后，汉纳海槽被埋在白垩纪和新生代前陆盆地沉积物之下>2 km，在此期间，该地区发生了复杂的附加变形。(3)北楚科奇高压是由晚白垩世-古近纪深部逆冲作用（南北向）和穿越复杂的古老构造组构的可能的压扭反转作用造成的。(4)北方汉纳海槽新生代东西向伸展和走滑断层活动重新激活了石炭纪裂谷构造，西部主要是在老断层上的离散运动，而东部则以更分散的方式在老裂谷附近合并，并在最后的负反转期间切割晚白垩世-古近纪收缩构造。楚科奇大陆架多期构造继承性的记录对于揭示该地区的构造历史和对油气系统的影响至关重要。
Interpretation of over 100,000 line-km of reprocessed 2D, time-migrated, seismic-reflection data from the U.S. Chukchi shelf documents at least four tectonic events in the last 400 m.y. that generated distinct inherited structures. A well stratified economic basement whose internal geometry clearly defines a pre-Mississippian, thin-skinned fold-and-thrust belt represents the earliest recognizable tectonism in the area, one that accommodated west-east (present-day coordinates) shortening, probably in the Devonian. (1) The first inversion event, and dominant crustal feature in the Chukchi shelf, is the Hanna Trough, a north-south, failed rift system that accommodated more than 10 km of Carboniferous-Jurassic syn-rift and post-rift (sag) strata. Carboniferous extensional collapse of the previous orogenic belt to form the Hanna Trough was influenced heterogeneously by the pre-Mississippian contractional fabrics. Many rift-phase normal faults detach along pre-Mississippian thrust faults in discrete negative inversion, creating distinctive synthetic growth strata that constrain the geometry of extension. Other normal faults cut across pre-Mississippian stratigraphy showing more typical rollover geometries in growth strata and dissection of contractional structures in the pre-rift strata in more distributed negative inversion. (2) After a period of Pennsylvanian to Early Jurassic subsidence, in the south-central Chukchi shelf several north-south, rift-phase normal faults were inverted in a second event in the Late Jurassic to Early Cretaceous, forming local, asymmetric, positive inversion structures due to west-east shortening likely associated with far-field effects of the Chukotkan orogeny. The Hanna Trough then was buried beneath >2 km of Cretaceous and Cenozoic foreland-basin deposits during which complex additional deformation occurred in the region. (3) The North Chukchi high resulted from Late Cretaceous-Paleogene deep thrusting, both south- and north-directed, and possible transpressional inversion across a complex older structural fabric. (4) Cenozoic east-west extension and strike-slip faulting in the northern Hanna Trough reactivated Carboniferous rift structures, in the west as dominantly discrete motion on the older faults, and in the east in more distributed fashion coalescing near older rifts and cutting Late Cretaceous-Paleogene contractional structures during a final negative inversion. Documentation of multi-phase structural inheritance in the Chukchi shelf is vital to unraveling the tectonic history and influences on petroleum systems in the area.
登录
查看更多内容
晚侏罗世-早白垩世裂谷结构的反转，以及裂谷后不整合面石油系统元素的联系，美国楚科奇陆架，北极阿拉斯加
影响因子：
--
作者：
D. Houseknecht;C. Connors
通讯作者：
C. Connors
利用碎屑锆石 U-Pb 测年量化中白垩世北极阿拉斯加的大规模大陆架边缘增长和动态
影响因子：
5.8
作者：
R. Lease;D. Houseknecht;A. Kylander‐Clark
通讯作者：
A. Kylander‐Clark
阿拉斯加北极地区一个巨大的白垩纪（阿普天-塞诺曼阶）斜层中重大新石油发现的石油系统框架
影响因子：
3.5
作者：
D. Houseknecht
通讯作者：
D. Houseknecht
加拿大北极群岛劳伦大陆北缘早奥陶世至早泥盆世构造发育
DOI：
10.1130/b35017.1
发表时间：
2019
期刊：
GSA Bulletin
影响因子：
--
作者：
K. Dewing;T. Hadlari;D. G. Pearson;W. Matthews
通讯作者：
W. Matthews
影响因子：
--
作者：
Albert W. Bally
通讯作者：
Albert W. Bally