In this paper, the determination and analysis of oxygen and carbon isotopes were carried out on 155 core and 180 core respectively. These data provides us with a fundamental understanding of the paleotemperature and p...In this paper, the determination and analysis of oxygen and carbon isotopes were carried out on 155 core and 180 core respectively. These data provides us with a fundamental understanding of the paleotemperature and paleoenvironmental evolution features and climate-stratigraphic classification of central Okinawa Trough since the late-glacial.展开更多
Based on δ^18O,δD,δ^30Si and δ^34S values stable isotope determinations and previous studies, the hydrothermal chimneys in the Mariana Trough is the silicic chimney consisting dominantly of amorphous SiO2(opal) wh...Based on δ^18O,δD,δ^30Si and δ^34S values stable isotope determinations and previous studies, the hydrothermal chimneys in the Mariana Trough is the silicic chimney consisting dominantly of amorphous SiO2(opal) whose oxygen isotope temperature is generally lower than 200℃,reflectingintermediate-low temperature type. Volcanic hydrothermal sulfides with the metallic mineral has a intermediate-higher oxygen isotope temperature(peak value 275℃) in the Mariana Arc. hydrothermal sulfides in the Mariana Trough is closely related to the oceanic environment and not affected by atmospheric precipitation.展开更多
文摘In this paper, the determination and analysis of oxygen and carbon isotopes were carried out on 155 core and 180 core respectively. These data provides us with a fundamental understanding of the paleotemperature and paleoenvironmental evolution features and climate-stratigraphic classification of central Okinawa Trough since the late-glacial.
文摘Based on δ^18O,δD,δ^30Si and δ^34S values stable isotope determinations and previous studies, the hydrothermal chimneys in the Mariana Trough is the silicic chimney consisting dominantly of amorphous SiO2(opal) whose oxygen isotope temperature is generally lower than 200℃,reflectingintermediate-low temperature type. Volcanic hydrothermal sulfides with the metallic mineral has a intermediate-higher oxygen isotope temperature(peak value 275℃) in the Mariana Arc. hydrothermal sulfides in the Mariana Trough is closely related to the oceanic environment and not affected by atmospheric precipitation.
