کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4718687 1639131 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Occurrence of faecal pellet-filled simple and composite burrows in cold seep carbonates: A glimpse of a complex benthic ecosystem
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
Occurrence of faecal pellet-filled simple and composite burrows in cold seep carbonates: A glimpse of a complex benthic ecosystem
چکیده انگلیسی

Ichnofossils preserved in marine sedimentary records provide unique information on various activities (feeding, dwelling, excretion etc.) of benthic organisms. Here we report faecal pellet-filled tubular (simple and composite) burrow casts from cold seep carbonate layers (16–18 mbsf) deposited at least 46–58 kyr ago in the Krishna–Godavari basin, Bay of Bengal, India. Deposition of these chemosynthetic clam bearing authigenic carbonate sediments with highly depleted carbon stable isotope ratios indicates methane expulsion that resulted in the development of a cold seep ecosystem. Although cold seep communities are extensively reported from the rock record and modern seep sites, hardly any information is available on burrowing activity of the seep biota. Our findings open up a window for future investigation of the ecological significance of such burrows.


► We report burrow casts and faecal pellets in carbonates formed at a paleoseep site.
► Carbon stable isotope ratios suggest AOM as the bicarbonate source.
► We describe composite burrows which indicate existence of a complex ecosystem.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Geology - Volume 289, Issues 1–4, 1 November 2011, Pages 117–121
نویسندگان
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