Mineral XRD peak areas and ratios of ODP Site 184-1146 clays, South China Sea

Site 1146 (19°27.40'N, 116°16.37'E) was drilled in ~2092 m water depth in a rift basin on the continental slope of the South China Sea. A total of 607 m of sediment was cored in Hole 1146A, and a composite section from three holes extends down to 640 meters composite depth (mcd). Three stratigraphic sedimentary units were recognized at this site: late Pliocene to Pleistocene nannofossil clay (Unit I), middle Miocene to late Pliocene foraminifer and nannofossil clay mixed sediment (Unit II), and early to middle Miocene nannofossil clay (Unit III). This study reports the mineralogy from the late Miocene through early Pleistocene, 150-440 mcd.

1146站位（北纬19°27.40′，东经116°16.37′）于南海大陆坡裂谷盆地约2092米水深区域开展钻探作业。1146A钻孔共取获607米沉积物岩芯，由三个钻孔拼接得到的复合剖面延伸至640米复合深度（meters composite depth, mcd）。该站位共识别出三套地层沉积单元：上新世晚期至更新世颗石藻粘土（单元I）、中中新世至上新世晚期有孔虫-颗石藻混合粘土沉积物（单元II），以及早-中中新世颗石藻粘土（单元III）。本研究报道了该站位150~440米复合深度区间内晚中新世至早更新世沉积物的矿物学特征。