Laboratory measurements of ‘porosity-free’ intrinsicVpandVsin an olivine gabbro of the Oman ophiolite: Implication for interpretation of the seismic structure of lower oceanic crust

Island Arc ◽  
2015 ◽  
Vol 24 (2) ◽  
pp. 131-144 ◽  
Author(s):  
Satoshi Saito ◽  
Masahiro Ishikawa ◽  
Makoto Arima ◽  
Yoshiyuki Tatsumi
Keyword(s):  
Oceanic Crust ◽  
Olivine Gabbro ◽  
Seismic Structure ◽  
Laboratory Measurements ◽  
Oman Ophiolite ◽  
Lower Oceanic Crust

scholarly journals Petro-geochemical characteristics and origin of the quartz in the lower oceanic crust, example from IODP-Hole U1473A

2020 ◽  
Vol 61 (4) ◽  
pp. 67-74
Author(s):  
Du Khac Nguyen ◽  
Tomoaki Morishita ◽  
Keyword(s):  
Oceanic Crust ◽  
Crystallization Mechanism ◽  
Southwest Indian Ridge ◽  
Precipitation Process ◽  
Olivine Gabbro ◽  
Magmatic Origin ◽  
Fracture Systems ◽  
Atlantis Bank ◽  
Lower Oceanic Crust ◽  
Felsic Rocks

IODP-Hole U1473A was drilled on the summit of Atlantis bank, Southwest Indian Ridge recovered large amounts of gabbroic rocks including mainly olivine gabbro. Felsic rocks are minor, approximately 1,5% of the total volume, which are comprising significant amount of quartz in some samples. The Ti concentrations and the estimated temperatures of the quartz in veins are relatively high, ranging from 30÷130 ppm and 540÷7000C, coupled with the myrmekitic textures in some veins are unambigeous evidence for the late magmatic origin. In addition to the crystallization mechanism in free spaces, such as crack/ fracture systems during the penetration of SiO2 - saturated magmas; the quartz is also formed by re-precipitation process at the same location leaving behind after the previous olivine in the host gabro has been dissolved.

scholarly journals The composition of the lower oceanic crust in the Wadi Khafifah section of the southern Samail (Oman) ophiolite

2021 ◽  
Author(s):  
J. A. VanTongeren ◽  
P. B. Kelemen ◽  
C. J. Garrido ◽  
M. Godard ◽  
K. Hanghoj ◽  
...  
Keyword(s):  
Oceanic Crust ◽  
Oman Ophiolite ◽  
Lower Oceanic Crust

Synmagmatic normal faulting in the lower oceanic crust: Evidence from the Oman ophiolite

Geology ◽  
2011 ◽  
Vol 39 (4) ◽  
pp. 391-394 ◽  
Author(s):  
B. Abily ◽  
G. Ceuleneer ◽  
P. Launeau
Keyword(s):  
Oceanic Crust ◽  
Normal Faulting ◽  
Oman Ophiolite ◽  
Lower Oceanic Crust

scholarly journals Partial Melting of Lower Oceanic Crust Gabbro: Constraints From Poikilitic Clinopyroxene Primocrysts

2018 ◽  
Vol 6 ◽  
Author(s):  
Julien Leuthold ◽  
C. Johan Lissenberg ◽  
Brian O'Driscoll ◽  
Ozge Karakas ◽  
Trevor Falloon ◽  
...  
Keyword(s):  
Partial Melting ◽  
Oceanic Crust ◽  
Lower Oceanic Crust
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