نتایج جستجو برای: sedimentary structure

تعداد نتایج: 1577589  

2012
Victor Zochhuana Ralte

A thick succession of sedimentary rocks belonging to Tipam Group is well exposed all along the road cut sections near Buhchang village, Kolasib district, Mizoram. The heavy mineral suite of the Tipam sediments depicts a cosmopolitan nature. It comprises dominantly of non-opaque variety that includes zircon, tourmaline, rutile, staurolite, kyanite, sillimanite, apatite, epidote, garnet and hornb...

Journal: :Science 2001
M M Kuypers P Blokker J Erbacher H Kinkel R D Pancost S Schouten J S Sinninghe Damste

Biogeochemical and stable carbon isotopic analysis of black-shale sequences deposited during an Albian oceanic anoxic event (approximately 112 million years ago) indicate that up to 80 weight percent of sedimentary organic carbon is derived from marine, nonthermophilic archaea. The carbon-13 content of archaeal molecular fossils indicates that these archaea were living chemoautotrophically. The...

The sediments of the Playa Lake are sensitive indicators of local climates that any change in climate, hydrology, and sedimentary environment will cause changes in the physical and chemical properties of the sediments. These sediments create a valuable and important archive with high resolution to examine these changes in the past. One method of studying climate change during quaternary and oft...

Journal: :فیزیک زمین و فضا 0
بنفشه حبیبیان دهکردی دانشجوی دکتری ژئوفیزیک، گروه فیزیک زمین، مؤسسة ژئوفیزیک، دانشگاه تهران، ایران بهروز اسکویی استادیار، گروه فیزیک زمین، مؤسسة ژئوفیزیک، دانشگاه تهران، ایران هاینریش براسه استاد، دانشکده علوم زمین، دانشگاه برلین، آلمان

the conductivity distribution across the trans-european suture zone (tesz) is presented based on the measurements along a 400 km northeastern directed profile, starting from the german-polish basin, crossing the tesz and ending at the east european craton. two-dimensional inversion was applied to magnetotelluric transfer functions and magnetovariational responses corresponding to 38 long-period...

Journal: :Journal of magnetic resonance 2003
Andrew J Fagan Gareth R Davies James M S Hutchison David J Lurie

A prototype continuous wave MRI system operating at 7T has been used successfully to study a variety of heterogeneous materials exhibiting T2 relaxation values ranging from 10 micros to 50 ms. Two-dimensional images of a poly(methly methacrylate) (PMMA) resolution phantom (T2=38 micros) exhibited a spatial resolution of approximately 1mm at a magnetic field gradient strength of 200 mT/m. The te...

2017
Shigeki Wada Akihiro Sawada Yoshihiro Hiramatsu Nayuta Matsumoto Shinsuke Okada Toshiyuki Tanaka Ryo Honda

We have investigated gravity anomalies around the Niigata plain, which is a sedimentary basin in central Japan bounded by mountains, to examine the continuity of subsurface fault structures of a large fault zone—the eastern boundary fault zone of the Niigata plain (EBFZNP). The features of the Bouguer anomaly and its first horizontal and vertical derivatives clearly illustrate the EBFZNP. The s...

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