ophiolitic การใช้

• The Br関enne Unit is an ophiolitic nappe of Upper Devonian age.
• The back-arc basin closes and ophiolitic obduction occurs.
• They can be networks of ophiolitic fragments.
• Oldest rocks in the region are pre-Tertiary metamorphics and ophiolitic suite of rocks of Cretaceous age.
• Fragments of the inverted oceanic ophiolitic complexes in this area, including the Larsen Harbour complex on South Georgia.
• Limited exposures of post-ophiolitic sedimentary rocks of Eocene age suggest dominant erosional processes from Paleocene to Eocene period.
• The northward dip of thrusts at the base of, and within, the ophiolitic rocks is interpreted to be caused by rotation of initially south-dipping thrust planes due to the dominantly south-dipping post-Variscan extensional faults.
• An ophiolitic suite is found in the Nicoya Complex, which is made up of cherts, graywackes, formations are uplifted to the southeast and are overlain in the northwest by a slightly tilted marine near-shore sequence, the El Fraile formation.
• Basically nappes ( thrust sheets ) from each plate collide and begin to stack one on top of the other; evidence of this process can be seen in preserved ophiolitic nappes ( preserved in the Himalaya ), and in rocks with an inverted metamorphic gradient.
• The Chimaera gas seep, near Antalya ( SW Turkey ), new and thorough molecular and isotopic analyses including methane ( ~ 87 % v / v; D13C1 from-7.9 to-12.3 0; D13D1 from-119 to-124 0 ), light alkanes ( C2 + C3 + C4 + C5 = 0.5 %; C6 + : 0.07 %; D13C2 from-24.2 to-26.5 0; D13C3 from-25.5 to-27 0 ), hydrogen ( 7.5 to 11 % ), carbon dioxide ( 0.01-0.07 %; D13CCO2 :-15 0 ), helium ( ~ 80 ppmv; R / Ra : 0.41 ) and nitrogen ( 2-4.9 %; D15N from-2 to-2.8 0 ) converge to indicate that the seep releases a mixture of organic thermogenic gas, related to mature Type III kerogen occurring in Paleozoic and Mesozoic organic rich sedimentary rocks, and abiogenic gas produced by low temperature serpentinization in the Tekirova ophiolitic unit.