Unraveling the Complex Features of the Seismic Scatterers in the Mid‐Lower Mantle Through Phase Transition of (Al, H)‐Bearing Stishovite

• Published in: Geophysical research letters Vol. 52; no. 14
• Main Authors: Yu, Yingxin, Zhang, Youyue, Li, Luo, Zhang, Xinyue, Wang, Denglei, Mao, Zhu, Sun, Ningyu, Zhang, Yanyao, Li, Xinyang, Li, Wancai, Speziale, Sergio, Zhang, Dongzhou, Lin, Jung‐Fu, Yoshino, Takashi
• Format: Journal Article
• Language: English
• Published: Washington John Wiley & Sons, Inc 28.07.2025; Wiley
• Subjects: (Al, H)‐bearing stishovite; Aluminum; Concretions; Crusts; Lower mantle; mid‐lower mantle; Oceanic crust; phase transition; Phase transitions; Raman spectroscopy; Silica; Silicon dioxide; small‐scale seismic scatterers; Spectroscopy; Stishovite; Subduction; Subduction (geology); Subduction zones; Transition pressure; X-ray diffraction

Small‐scale scatterers observed in the mid‐lower mantle beneath the subduction zones are thought to result from the phase transition of stishovite within subducted oceanic crusts. Here we investigate the phase transition of (Al, H)‐bearing stishovite with four compositions at simultaneously high P‐T...