Petrographic key parameters, modal proportions, amount of alteration and principal rock names for 39 gabbro samples form the Oman Ophiolite (Wadi Gideah Transect)

doi:doi:10.1594/PANGAEA.934700

Petrographic key parameters, modal proportions, amount of alteration and principal rock names for 39 gabbro samples form the Oman Ophiolite (Wadi Gideah Transect)

We have selected 39 gabbro samples from the Wadi Gideah Transect sample suite, representing a full coherent crustal profile from the Moho transition zone (MTZ) to the dike/gabbro transition with an average sample spacing of about 120 m along the crustal depth. All samples were taken at outcrops of fresh gabbro along the Wadi. The height above Moho (h.a.M.) was calculated with respect to the MTZ reference latitude of 22.9152N DD, assuming a generalized average dip of 28° for the layering of the lower gabbros in the Wadi Gideah area. The freshest and primary region of each hand specimen was cut into a block with a water-cooled diamond-blade saw, avoiding areas influenced by secondary weathering and hydrothermal overprint, and subsequently processed to a polished thin-section. We studied the thin-sections using a polarized light microscope to identify petrographic key parameters, which are presented here.

BibTex:

@dataset{Müller_Samuel_and_Garbe-Schönberg_Dieter_and_Koepke_Jürgen_and_Hoernle_Kaj_2021,
    abstract = {We have selected 39 gabbro samples from the Wadi Gideah Transect sample suite, representing a full coherent crustal profile from the Moho transition zone (MTZ) to the dike/gabbro transition with an average sample spacing of about 120 m along the crustal depth. All samples were taken at outcrops of fresh gabbro along the Wadi. The height above Moho (h.a.M.) was calculated with respect to the MTZ reference latitude of 22.9152N DD, assuming a generalized average dip of 28° for the layering of the lower gabbros in the Wadi Gideah area. The freshest and primary region of each hand specimen was cut into a block with a water-cooled diamond-blade saw, avoiding areas influenced by secondary weathering and hydrothermal overprint, and subsequently processed to a polished thin-section. We studied the thin-sections using a polarized light microscope to identify petrographic key parameters, which are presented here.},
    author = {Müller, Samuel and Garbe-Schönberg, Dieter and Koepke, Jürgen and Hoernle, Kaj},
    doi = {10.1594/PANGAEA.934700},
    institution = {PANGAEA (Lithosphere)},
    keyword = {'EMPA', 'EPMA', 'Geochemistry', 'ICP', 'ICPMS', 'LA', 'MS', 'Mineral compositions', 'Oman Ophiolite', 'Petrography', 'Samail Ophiolite', 'Temperature', 'Wadi Gideah', 'Wadi Gideah Transect', 'and major elements', 'crystallization temperature', 'foliated gabbro', 'fossile ocean crust', 'gabbro', 'in situ data', 'layered gabbro', 'major and trace element data', 'major and trace elements', 'major element analysis', 'major elements', 'microscopy', 'mineral data', 'modal proportions', 'ocean crust accretion', 'ocean crust formation', 'oceanic crust', 'olivine', 'ophiolite', 'rock description', 'section', 'thin', 'trace', 'trace element', 'trace elements'},
    title = {Petrographic key parameters, modal proportions, amount of alteration and principal rock names for 39 gabbro samples form the Oman Ophiolite (Wadi Gideah Transect)},
    url = {https://service.tib.eu/ldmservice/vdataset/png-doi-10-1594-pangaea-934700},
    year = {2021}
}