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The Earth's Lower Mantle - Composition and Structure (Hardcover, 1st ed. 2017)
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The Earth's Lower Mantle - Composition and Structure (Hardcover, 1st ed. 2017)
Series: Springer Geology
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This book presents the first overview of the composition and
structure of the Earth's lower mantle. The first part focuses on
the study of lower-mantle minerals, identified as inclusions in
diamonds from different regions of the world. Three associations
are established among the lower-mantle minerals: ultramafic, mafic,
and carbonatic. The carbonatic association is of particular
interest because it characterizes the media of natural diamond
formation. In turn, the second part analyzes the structure of the
lower mantle, revealing its heterogeneous composition. It is based
on the results of experiments demonstrating phase transitions in
lower-mantle minerals, and on seismological data. Deep-seated
earthquakes point to the presence within the lower mantle of
numerous seismic boundaries caused by mineral structure
transitions. In closing, the last part of the book compares
observed data with experimental data, highlighting several
discrepancies that indicate Earth may have a more complex planetary
history than previously assumed, and examining its primarily
non-chondritic composition.
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