کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8867371 | 1621547 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pockmarks on the South Aquitaine Margin continental slope: The seabed expression of past fluid circulation and former bottom currents
ترجمه فارسی عنوان
نشانه هایی در شیب قاره افق افریقای جنوبی: بیان موضعی گردش خون مایع و جریان های پایین سابق
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
Inactive and mostly elongated pockmarks of 100-200Â m in dimension were recently discovered on the South Aquitaine Margin continental slope. They are distributed at water depths greater than 350Â m in both interfluve and sediment-wave areas, and are strongly controlled by the sedimentary morphology and architecture. Water column and seafloor backscatter and sub-bottom profiler data do not exhibit present-day or past gas evidence, e.g., massive and continuous gas releases at the seabed and fossil methane-derived authigenic carbonates. It is thus proposed that the pockmarks originated from a shallow source and result from relatively recent and short-duration gas or water expulsion events. Former near-bottom currents may have contributed to the elongation of these WNW-ESE-oriented pockmarks, whereas present-day weaker near-bottom currents may induce upwelling, contributing to the maintenance of the elongated shapes of the pockmarks.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comptes Rendus Geoscience - Volume 349, Issue 8, December 2017, Pages 391-401
Journal: Comptes Rendus Geoscience - Volume 349, Issue 8, December 2017, Pages 391-401
نویسندگان
Guillaume Michel, Stéphanie Dupré, Agnès Baltzer, Axel Ehrhold, Patrice Imbert, Mathilde Pitel, Benoît Loubrieu, Carla Scalabrin, Pascal Lazure, Louis Marié, Jean-Baptiste Geldof, Ãric Deville,