کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4682072 1635141 2016 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Paleoenvironmental reconstruction based on palynofacies analyses of the Cansona Formation (Late Cretaceous), Sinú-San Jacinto Basin, northwest Colombia
ترجمه فارسی عنوان
بازسازی زمین های زیست محیطی بر اساس تجزیه پالینوفسس از سازند کانسونا (کرتاسه پسین)، حوضه سینآئو سن ژیزینتو، شمال غربی کلمبیا
کلمات کلیدی
ماده آلی رسوبی، سانتونین (؟) - ماستریچستان، شمال امریکا جنوبی، روندهای قاره ای دریایی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی


• Stratigraphic and lateral distribution of palynofacies associations of the Sinú-San Jacinto Basin, northwest Colombia.
• The four revealed palynofacies shows different depositional environments.
• From Cerro Cansona and Chálan to Lorica and Monteria areas, the areas are more marine proximal to deeper settings.

To reconstruct the paleoenvironments of the Cansona Formation, a Cretaceous succession in Colombia that has controversial paleoenvironmental interpretation, occasionally deep marine and occasionally shallow marine, palynofacies analyses were conducted on 93 samples from four sections of the Sinú San Jacinto Basin in the north, midwest, and southwest sectors. For the palynofacies analyses, the kerogen categories were counted and subjected to cluster analyses. Four palynofacies associations were revealed for the four sections: Palynofacies Association I (PA I), which consisted of microforaminiferal linings, scolecodonts, dinoflagellate cysts, pollen grains, and fungi hyphae; PA II, which consisted of phytoclast translucent non-biostructured and biostructured, opaque phytoclasts (equidimensional and lath shaped); PA III, which consisted of pseudoamorphous particles, cuticles, resin, and fungal spores; and PA IV, which consisted of fluorescent and non-fluorescent amorphous organic matter and the fresh-water algae Botryococcus. In contrast to early studies that suggested a generalization of the depositional environment for the Cansona Formation (deep or shallow conditions), this study suggests that the formation reflects conspicuous stratigraphic and lateral changes and hence different depositional environments. The Cerro Cansona (CC4 section) and Chalán (AP section) areas are a more marine proximal settings (Early Campanian-Maastrichtian), and there is an intermediate setting for the Lorica area (SC section) and deeper conditions for the Montería area (CP2 section).

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of South American Earth Sciences - Volume 69, August 2016, Pages 103–118
نویسندگان
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