Nondestructive density determination on marine sediment cores from gamma-ray attenuation measurements |
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| Authors: | Sebastian Gerland Heinrich Villinger |
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| Institution: | (1) Alfred Wegener Institute for Polar and Marine Research, Postfach 120161, D-27515 Bremerhaven, Germany;(2) FB Geowissenschaften, Universität Bremen, Postfach 330440, D-28334 Bremen, Germany |
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| Abstract: | We describe an improved nondestructive technique for density measurement based on gamma-ray absorption that permits construction of high-resolution density profiles of marine sediment cores. The system is capable of resolving vertical density variations with a spatial resolution of 4 mm and absolute accuracy of ± 1%. Comparison with conventional density determination on samples confirms the absolute accuracy. In addition to standard vertical profiling, a core rotation option is included to measure density as a function of rotation angle. This allows the quantification of the variability of density within a layer and detection of inhomogenities like icerafted debris or biogenic structures. |
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