Sequence Stratigraphy of Lower Cretaceous (Barremian-Albian) Carbonate Platforms of Northeastern Mexico: Regional and Global Correlations
Sequence Stratigraphy of Lower Cretaceous (Barremian-Albian) Carbonate Platforms of Northeastern Mexico: Regional and Global Correlations
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墨西哥东北部下白垩统（巴雷姆-阿尔布阶）碳酸盐台地层序地层学：区域和全球相关性
DOI：
10.1306/2dc40917-0e47-11d7-8643000102c1865d
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发表时间：
2000
影响因子：
2
通讯作者：
I. Montañez
中科院分区：
文献类型：
--
作者：
C. Lehmann;D. Osleger;I. Montañez
墨西哥东北部的下白垩世丘比特（Cupido）和科阿韦拉（Coahuila）地台是环绕墨西哥湾祖先的广阔碳酸盐岩地台体系的一部分。在新获得的生物地层资料和C、Sr同位素地层学的约束下，根据垂直旋回叠加模式的区域对比，建立了巴雷系—阿尔贝系台地的层序地层模型。丘比多陆架泻湖（巴雷米亚-阿普tian）由多达150个潮外旋回组成，这些旋回叠加成跨陆架相关的高频序列。丘比特多高频层序形成了下部分复合层序（Cu1）、上覆完全复合层序（Cu2）和第三层复合层序（Cu-Co3）的海侵基底，与丘比特多地台的退步有关。Cu-Co3的高位部分记录于Coahuila台地（Aptian-Albian）的蒸发岩相和碳酸盐岩相。超过80米尺度的蒸发岩-碳酸盐旋回是Coahuila地台有限内部的特征，并叠加成两个完整的复合层序（Co4, Co5）。科阿韦拉台地在阿尔比尼亚晚期或塞诺曼尼亚早期被淹没，终止了该地区的浅水碳酸盐岩沉积。墨西哥东北部沉积层序与同期德克萨斯台地和墨西哥湾北部台地的区域对比表明，丘比多陆架下部的两个复合层序与德克萨斯州Sligo-Hosston台地下部的沉积层序相对应。德克萨斯州的Sligo组和Pearsall组记录了丘比多-拉佩纳组第三复合层序的海侵体系域。第三复合层序（Coahuila台地）的高位体系域和不整合顶部可能与德克萨斯州上格伦罗斯台地同时代。第4和第5复合层序分别与Fredericksburg台地和德克萨斯州washata - devils河台地相关。我们保守地将我们的层序-地层格架与来自其他几个盆地的复合“全球”层序和“上升”曲线进行了比较。考虑到可用的时间分辨率，结果是可变的，但Cu-Co3和Co5顶部的序列边界似乎具有明确的盆间等效。
ABSTRACT The Lower Cretaceous Cupido and Coahuila platforms of northeastern Mexico form part of the extensive carbonate platform system that surrounded the ancestral Gulf of Mexico. A sequence-stratigraphic model for these Barremian to Albian platforms was constructed from regional correlations of vertical cycle stacking patterns constrained by newly acquired biostratigraphic data and C and Sr isotope stratigraphy. The Cupido shelf lagoon (Barremian-Aptian) is composed of up to 150 peritidal cycles, which stack into high-frequency sequences that are correlated across the shelf. Cupido high-frequency sequences build into a lower partial composite sequence (Cu1), an overlying full composite sequence (Cu2), and the transgressive base of a third composite sequence (Cu-Co3) related to backstepping of the Cupido platform. The highstand part of Cu-Co3 is recorded in evaporite and carbonate facies of the Coahuila platform (Aptian-Albian). More than 80 meter-scale evaporite-to-carbonate cycles characterize the restricted interior of the Coahuila platform and stack into two full composite sequences (Co4, Co5). The Coahuila platform was drowned in the latest Albian or earliest Cenomanian, terminating shallow-water carbonate sedimentation in the region. Regional correlations of the depositional sequences in northeast Mexico with coeval platforms in Texas and the northern Gulf coast indicate that the lower two composite sequences of the Cupido shelf correlate with the lower part of the Sligo-Hosston platform in Texas. The transgressive systems tract of the third composite sequence of the Cupido-La Pena is recorded in Texas by the upper Sligo and Pearsall formations. The highstand systems tract and the disconformable top of the third composite sequence (Coahuila platform) is likely coeval with the upper Glen Rose platform in Texas. The fourth and fifth composite sequences are correlative with the Fredericksburg platform and the Washita-Devils River platforms of Texas, respectively. We conservatively correlated our sequence-stratigraphic framework with composite "global" sequences and "eustatic" curves derived from several other basins. Given the available time resolution, results are variable, but sequence boundaries at the top of Cu-Co3 and Co5 appear to have clear interbasinal equivalents.