Two petrosals from the Late Oligocene of the northern Junggar Basin, Xinjiang Uygur Autonomous Region of China are described and are assigned to ?Yindirtemys and ?Sinolagomys or Desmatolagus based on sizes and morphol...Two petrosals from the Late Oligocene of the northern Junggar Basin, Xinjiang Uygur Autonomous Region of China are described and are assigned to ?Yindirtemys and ?Sinolagomys or Desmatolagus based on sizes and morphologies. The unit formed by a fused bulla and petrosal, the spongy bullar wall and the anterior position of the entrance for the stapedial artery into the tympanic cavity indicate that petrosal A is most likely from an ochotonid. Absence of grooves and formina for the internal carotid artery around the promontorium suggests petrosal B probably belongs to the ctenodactylid Yindirtemys. If the identifications are confirmed, these specimens represent the first records of ear regions in the two taxa.展开更多
晚渐新世-中中新世,南海南部经历了重要的构造变革,北康盆地物源发生了重大变化,引起分散体系的变化,从而影响油气资源分布,因此物源研究具有重要意义.利用地震反射资料,开展地震属性分析,通过RMS(均方根振幅)地层切片,分析分散体系,并...晚渐新世-中中新世,南海南部经历了重要的构造变革,北康盆地物源发生了重大变化,引起分散体系的变化,从而影响油气资源分布,因此物源研究具有重要意义.利用地震反射资料,开展地震属性分析,通过RMS(均方根振幅)地层切片,分析分散体系,并探讨物源变化及其控制因素.在晚渐新世-中中新世,北康盆地的沉积物源主要来自南侧,分散体系自南向北;不整合面之后海水突然加深,形成以早中新世不整合面(E M U)为界的2个沉积旋回;在每个旋回内,沉积物补给逐渐增多;在中中新世,沉积物源逐渐向北西方向迁移.通过区域分析,认为北康盆地的物源主要来自南部的曾母前陆盆地,物源的变化是曾母前陆盆地逐渐淤浅成陆和向北推进所致.展开更多
文摘Two petrosals from the Late Oligocene of the northern Junggar Basin, Xinjiang Uygur Autonomous Region of China are described and are assigned to ?Yindirtemys and ?Sinolagomys or Desmatolagus based on sizes and morphologies. The unit formed by a fused bulla and petrosal, the spongy bullar wall and the anterior position of the entrance for the stapedial artery into the tympanic cavity indicate that petrosal A is most likely from an ochotonid. Absence of grooves and formina for the internal carotid artery around the promontorium suggests petrosal B probably belongs to the ctenodactylid Yindirtemys. If the identifications are confirmed, these specimens represent the first records of ear regions in the two taxa.
文摘晚渐新世-中中新世,南海南部经历了重要的构造变革,北康盆地物源发生了重大变化,引起分散体系的变化,从而影响油气资源分布,因此物源研究具有重要意义.利用地震反射资料,开展地震属性分析,通过RMS(均方根振幅)地层切片,分析分散体系,并探讨物源变化及其控制因素.在晚渐新世-中中新世,北康盆地的沉积物源主要来自南侧,分散体系自南向北;不整合面之后海水突然加深,形成以早中新世不整合面(E M U)为界的2个沉积旋回;在每个旋回内,沉积物补给逐渐增多;在中中新世,沉积物源逐渐向北西方向迁移.通过区域分析,认为北康盆地的物源主要来自南部的曾母前陆盆地,物源的变化是曾母前陆盆地逐渐淤浅成陆和向北推进所致.
