论文部分内容阅读
达尔马提亚(Dalmatian)地区始新世一中新世复理石盆地底部(东亚得里亚海)中的一些巨厚层状碳酸盐岩的下伏地层和上覆地层均为扇形三角洲砾岩,而薄层浊积岩与扇形三角洲砾岩呈指状穿插关系。扇形三角洲和指状穿插的浊积岩被解释为低水位期或海平面上升早期的产物。认为巨厚层状沉积是海平面加速上升时期形成的发育不全的扇形三角洲。这基于以下观察:(1)它们是一些扇形三角洲砾岩的上覆地层;(2)巨厚层状沉积中的骨屑和岩屑来源于陆上风化的较老的沉积岩;(3)其巨大的厚度说明主要是碎屑堆积且流水频率较低。推测巨厚层状沉积与相关的典型薄层浊积岩形成时海平面是不同的。两者的区别对深海沉积中的层序地层学研究非常重要。
Some of the thick stratigraphic and carbonate strata in the bottom of the Eocene-Pleistocene (East Adriatic) in the Dalmatian area are fan-shaped deltas Conglomerate, and thin turbidite and fan-shaped delta conglomerate interdigital finger interlacing relationship. Fan-shaped delta and interdigitated turbidites are interpreted as products of low water level or early sea level rise. It is thought that the massive thick sediments are hypoplastic fan-shaped deltas formed during the accelerated sea-level rise. This is based on the observation that (1) they are overlying strata of fan-shaped delta conglomerates; (2) bone chips and cuttings from very thick bedded sediments originate from older, over-weathered sediments; (3) Huge thickness indicates that the main debris accumulation and flow frequency is low. It is speculated that the meso-thick sediments are different from the sea-level at the time of the formation of the typical thin-layer turbidite. The difference between the two is very important for the study of sequence stratigraphy in deep-sea sediments.