پیوندهای مفید
اخبار و اعلانات
آمار
| تعداد نشریات | 161 |
| تعداد شماره‌ها | 6,572 |
| تعداد مقالات | 71,031 |
| تعداد مشاهده مقاله | 125,501,210 |
| تعداد دریافت فایل اصل مقاله | 98,764,585 |
Palynofacies analysis and paleoenvironmental interpretation of the Dalichai Formation, northeast of Semnan | ||
| Geopersia | ||
| مقاله 3، دوره 7، شماره 1 - شماره پیاپی 22287825، فروردین 2017، صفحه 27-34 اصل مقاله (613.14 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/geope.2017.224223.648291 | ||
| نویسنده | ||
| elahe zarei* | ||
| *Assistant Professor, Department of Geology, Faculty of Geology, Damghan University, | ||
| چکیده | ||
| Palynological and Palynofacies analysis combined with sedimentological studies have been performed on Dalichai Formation, northeast of Semnan, in order to define its paleoenviromental interpretation. Based on petrographic studies of organic matter, three palynofacies types were recognized as PF-1, PF-2, and PF-3. PF-1 is a characteristic of proximal shelf settings or basin. This palynofacies in the lower part of Dalichai Formation represents the shallowest environment because it is comprised almost exclusively of large black phytoclast while PF-1 in limestone successions in the upper part of Dalichai Formation was deposited in distal setting under suboxic environment. This interpretation is supported by sedimentological and paleontological data. PF-2 represents the lower and middle parts of the formation with high contents of brown wood and sporomorphs. In addition, it shows the presence of fluorescent amorphous organic matter and proximate dinocysts deposited in the open marine lagoon (the anoxic-suboxic environment) in agreement with general sedimentological observations. PF-3 has a high diversity of dinocysts, combined with the terrestrial material. A diverse dinocyst assemblage is common in shelf environments, leading us to interpret a possible inner to middle shelf close enough to land to allow accumulation of terrestrially derived organic material. | ||
| کلیدواژه‌ها | ||
| Palynofacies؛ Depositional environment؛ Dalichai Formation؛ Central Alborz | ||
|
سایر فایل های مرتبط با مقاله
|
||
|
آمار تعداد مشاهده مقاله: 1,325 تعداد دریافت فایل اصل مقاله: 1,453 |
||
سامانه مدیریت نشریات علمی. قدرت گرفته از سیناوب