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首页> 外文期刊>Facies >Late Cretaceous sedimentary evolution of a northern sector of the Adriatic Carbonate Platform (Matarsko Podolje,SW Slovenia)
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Late Cretaceous sedimentary evolution of a northern sector of the Adriatic Carbonate Platform (Matarsko Podolje,SW Slovenia)

机译：亚得里亚海碳酸盐岩台地北部部分的晚白垩纪沉积演化（斯洛文尼亚，马塔斯科·波多利耶）

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摘要

Cretaceous shallow-marine carbonate rocks of SW Slovenia were deposited in the northern part of the Adriatic Carbonate Platform. A 560-m-thick continuous Upper Cenomanian to Santonian carbonate succession has been studied near Hrunica Village in Matarsko Podolje. With regard to lithological, sedimentological, and stratigraphical characteristics, the succession has been divided into nine lithostratigraphic units, mainly reXecting regressive and transgressive intervals of larger scale. During the latest Cenomanian and Early Turonian, hemipelagic limestones were deposited on top of shallow-marine lagoon and peritidal Upper Cenomanian deposits indicating relative sea-level rise. Subsequently, the deeper marine depositional setting was gradually Wlled by clinoform bioclastic sand bodies overlain by peritidal and shallow-marine low-energy mainly lagoonal lithofacies. Similar lithofacies of predominately inner ramp/shelf depositional settings prevail over the upper part (i.e., Coniacian to Santonian) of the succession. In the area, the Upper Cetaceous carbonate rocks are separated from the overlying Lower Eocene (Upper Paleocene?) carbonate sequence by regional unconformity denoted by distinct paleokarstic features. On the Adriatic Carbonate Platform the deeper marine carbonate setting, developed at the Cenomanian/Turonian boundary, is usually correlated with OAE2 and related eustatic sea-level rise. Similarly, subsequent reestablished shallow-marine conditions are related to Late Turonian long- and shortterm sea-level fall. However, we are suggesting that deeper marine deposits were deposited in a tectonically induced intraplatform basin formed simultaneously with the uplift of the northern and northeastern marginal parts of the Adriatic Carbonate Platform.
机译：斯洛文尼亚西南部的白垩纪浅海碳酸盐岩沉积在亚得里亚海碳酸盐岩台地的北部。在Matarsko Podolje的Hrunica村附近研究了一个560米厚的上西诺曼期至桑顿期连续碳酸盐岩演替。在岩性，沉积学和地层学特征方面，该演替被划分为9个岩性地层学单位，主要反映较大范围的回归和海进间隔。在最新的西诺曼尼亚和早期土伦期，半海洋石灰石沉积在浅海泻湖和蠕动的上西诺曼尼亚沉积上，表明相对海平面上升。随后，深层的海洋沉积环境逐渐被蠕状和浅海低能，主要是泻湖岩相覆盖的斜形生物碎屑砂体覆盖。类似的岩相主要为内部斜坡/陆架沉积背景，分布在该演替的上部（即科尼亚期至桑顿期）。在该地区，上白垩统碳酸盐岩与上覆下新世（上古新世？）碳酸盐岩层段之间以区域不整合面分开，该不整合面具有明显的古地貌特征。在亚得里亚海碳酸盐台地上，在塞诺曼尼亚/ Turonian边界发育的更深的海洋碳酸盐环境通常与OAE2和相关的欣喜海平面上升有关。同样，随后重新建立的浅海条件与晚突尼斯的长期和短期海平面下降有关。但是，我们建议在与亚得里亚海碳酸盐岩台地北部和东北部边缘隆升同时形成的构造诱发的台内盆地中沉积更深的海相沉积物。

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