scholarly journals Map of marine geology of Upper Muir and Wachusett inlets, Glacier Bay, Alaska; sediment distribution and thickness, bathymetry, and interpreted seismic profiles

1984 ◽  
Author(s):  
Bruce F. Molnia ◽  
T.J. Atwood ◽  
P.R. Carlson ◽  
Austin Post ◽  
S.C. Vath
Keyword(s):  
Marine Geology ◽  
Seismic Profiles ◽  
Sediment Distribution ◽  
Glacier Bay

Palynology of Holocene Lake Baikal sediments

2020 ◽  
Author(s):  
Alienor Labes ◽  
Adriano Mazzini ◽  
Grigorii G. Akhmanov ◽  
Wolfram M. Kürschner
Keyword(s):  
Lake Baikal ◽  
Marine Geology ◽  
State University ◽  
Seismic Profiles ◽  
Scientific Center ◽  
Surrounding Matrix ◽  
Plant Fossil ◽  
Lake Bottom Sediments ◽  
Palynological Study ◽  
Moscow State University

<p class="p1"><span class="s1">The Class@Baikal 2019 expedition led by UNESCO-Moscow State University Educational-Scientific Center for Marine Geology and Geophysics (the Department of Geology, Moscow State University Lomonosov) sailed several transects between the southern and central part of the Lake Baikal, Russia. Seismic profiles were made to map the lake bottom sediments and structures as well as several short piston cores were drilled. The drilling sites were located a) following a nearshore to offshore transect to study the sedimentary processes and b) in areas where mud volcanoes were located in the geophysical data. Intriguingly, the sediments retrieved from the cores contained a high amount of plant debris, such as wood and conifer needles. The present palynological study has been started with the goal to better understand the sedimentological processes resulting in these distinct horizons of plant fossil rich sediments. Another goal is to obtain a stratigraphic age for the mud clasts and the surrounding matrix sediments of the presumed mud volcano structures. The first sediment samples appear to be rich in pollen and spores which allows to establish a palynostratigraphic framework for the studied cores.</span></p> <p class="p2"> </p>

scholarly journals Shoreline Changes Using Seabed Bathymetric, Sediments Scan and Profiles Observations in “Zarum” Gas Field Offshore Niger Delta

2019 ◽  
Vol 2 (4) ◽  
Keyword(s):  
Niger Delta ◽  
Outer Shelf ◽  
High Fidelity ◽  
Marine Geology ◽  
Gas Field ◽  
Sediment Distribution ◽  
Shore Line ◽  
Astronomical Tide ◽  
Seabed Bathymetry ◽  
Jack Up

Seabed bathymetry, sediment scan and profiles are relevant geological and hydrographic observations widely used in marine geology to predict shore line changes as it concerns offshore fields development in the Niger Delta. Reliefs and heterogeneous sediment distribution, both across the seabed surface and in the shallow seabed profiles below, were examined. This study of the “Zarum gas Field” in the outer shelf environment offshore eastern Niger-Delta was from the results of measurements using high fidelity onboard instrumentation: Edgetech 4600 Multibeam and Sidescan, and Edgetech Sub Bottom Profiler. These instruments were side mounted on MV Cosco and towed along survey grids, within the designed corridor with the survey speed of 3knots.Seabed features were interpreted based on the acoustic sound reflectivity and refractions. The bathymetric values were reduced to the lowest astronomical tide, LAT of Opobo River entrance and range from 20.20m-25.89m with a deepening trend from the northwest to southeast caused by seabed current regimes and storm processes affecting the shoreline zones. The sediments of the scan vary from sand, through silt to clay which are of arenitic origin. Weak seismostratigraphic layer of 30m thick was observed below the seabed, which is presently undergoing secondary lithification. The study also shows existence of depressions and sediment fill in them called spud cans which vary between 10m-40m in diameter and debris, associated with previous rig movements; jack up barges and their drags. Observed are some subsea facilities pipelines and jackets. Based on findings, recommendations have been formulated for development of this gas Field.

Marine geology and geologic history of Miho Bay, Southwest Japan, since the Late Pleistocene based on seismic profiles

2005 ◽  
Vol 111 (5) ◽  
pp. 255-268 ◽  
Author(s):  
Takahiko Inoue ◽  
Fujihiko Shioya ◽  
Naoya Iwamoto ◽  
Atsuko Amano ◽  
Yoshio Inouchi
Keyword(s):  
Late Pleistocene ◽  
Marine Geology ◽  
Southwest Japan ◽  
Seismic Profiles ◽  
Geologic History ◽  
History Of

Evaluation of Capacity of Salandi Reservoir Using Remote Sensing Data Along With Qgis Software

2018 ◽  
Vol 6 (8) ◽  
pp. 339
Author(s):  
Rupali Dhal ◽  
D. P. Satapathy
Keyword(s):  
Remote Sensing ◽  
Satellite Data ◽  
Remote Sensing Data ◽  
Project Work ◽  
Space Technology ◽  
Reservoir Water ◽  
Sediment Distribution ◽  
Sensing Data ◽  
Spread Area ◽  
Water Spread

The dynamic aspects of the reservoir which are water spread, suspended sediment distribution and concentration requires regular and periodical mapping and monitoring. Sedimentation in a reservoir affects the capacity of the reservoir by affecting both life and dead storages. The life of a reservoir depends on the rate of siltation. The various aspects and behavior of the reservoir sedimentation, like the process of sedimentation in the reservoir, sources of sediments, measures to check the sediment and limitations of space technology have been discussed in this report. Multi satellite remote sensing data provide information on elevation contours in the form of water spread area. Any reduction in reservoir water spread area at a specified elevation corresponding to the date of satellite data is an indication of sediment deposition. Thus the quality of sediment load that is settled down over a period of time can be determined by evaluating the change in the aerial spread of the reservoir at various elevations. Salandi reservoir project work was completed in 1982 and the same is taken as the year of first impounding. The original gross and live storages capacities were 565 MCM& 556.50 MCM respectively. In SRS CWC (2009), they found that live storage capacity of the Salandi reservoir is 518.61 MCM witnessing a loss of 37.89 MCM (i.e. 6.81%) in a period of 27 years.The data obtained through satellite enables us to study the aspects on various scales and at different stages. This report comprises of the use of satellite to obtain data for the years 2009-2013 through remote sensing in the sedimentation study of Salandi reservoir. After analysis of the satellite data in the present study(2017), it is found that live capacity of the reservoir of the Salandi reservoir in 2017 is 524.19MCM witnessing a loss of 32.31 MCM (i.e. 5.80%)in a period of 35 years. This accounts for live capacity loss of 0.16 % per annum since 1982. The trap efficiencies of this reservoir evaluated by using Brown’s, Brune’s and Gill’s methods are 94.03%, 98.01and 99.94% respectively. Thus, the average trap efficiency of the Salandi Reservoir is obtained as 97.32%.

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