Journal
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
Volume 73, Issue 1, Pages 1-12Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10064-013-0486-3
Keywords
Aggregates; Alteration; Geometrical properties; Ophiolitic rocks; Primary minerals; Secondary minerals
Funding
- European Social Fund (ESF)
- Operational Program for Educational and Vocational Training II (EPEAEK II)
- PYTHAGORAS
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The study investigated the influence of petrographic characteristics on the geometrical properties of ultrabasic and basic ophiolitic aggregates from Greece. Quantitative petrographic analysis indicates that the studied lithologies display various percentages of secondary mineral phases. Statistical analyses indicate that the geometrical characteristics of ultrabasic rocks tend to improve as the micropetrographic index I (rep) , the degree of serpentinisation, the ratio of soft to hard minerals and the ratio of secondary to primary minerals decrease. The aggregate particles of the basic lithotypes tend to be more elongated and flaky when the ratio of soft to hard minerals increases. The higher flakiness and elongation index values of the ultrabasic samples are attributed to the high percentage of serpentine, the local preferred orientation of the olivine grains and the existence of oriented transgranular microcracks.
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