从白垩纪到中系南北的古地理相关性与演化。

A. Alonso, J. Mas
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引用次数: 17

摘要

本文通过对西班牙中央山脉北段和南段白垩系露头岩相和古地理事件的比较,以期更好地认识白垩系北北盆地(Meseta Norcastellana)南缘的历史演化,并对该盆地与伊比利亚盆地的地质关系提出一些看法。对比了上白垩统北、南矿体最发育的区段,得到了一些沉积学、古构造学和古地质学的结论:与盆地其他地区一样,它们也存在两个沉积旋回(塞诺曼—turonian旋回和塞诺统旋回),具有海侵退的特征。可以识别NW-SE向的矿质滴度阈值,这决定了沉积特征和-NNE-SSW向的矿质古地理方向,决定了矿质盆地的矿质形态。萤石岩第二旋回(塞诺世)产生了成矿条件的h6iie化,不再反映成矿古地理阈值,成矿方向为NNE-SSW,这在第一次旋回非常重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Correlación y evolución paleogeográfica del Cretácico al norte y sur del Sistema Central.
This paper compares the facies and paleogeographic events of the cretacic outcrops, situated in tite Nortiten and Southern parts of the Spanisit Central Mountain Chain in arder to obtain a better comprehension of the historical evolution in the southern margin of the Cretaceous Nortit Basin (Meseta Norcastellana) Besides it wi]l provide some ideas about tite relations between this basin and tite Iberic one. It correlates tite best developed sections of the Upper Cretaceous in tite North and tite South, and some sedimentological, paleotectonical and paleogeo~raphical conclusions are obiained: They also exist two sedimentary cycles (Cenomanian-Turonian Cycle and Senonian Cycle) with transgresive regressive character, like in the rest of the basin. It is possible to recognize tite titresholds of NW-SE direction whicit condition the characteristics of sedimentation and tite paleogeopraphic direction -NNE-SSW which determines tite shape of tite basin. fluringtite second cycle (Senobian) the h6iiie~neization of tite conditions in tite basin is produced and it is not reflected anymore tite paleogeographic thresholds with tite direction NNE-SSW witich was very important during the first cycle.
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