Orbital and sea-level changes regulate the iron-associated sediment supplies from Papua New Guinea to the equatorial Pacific

Understanding the Role of Biogenic Magnetite in Geomagnetic Paleointensity Recording: Insights From Ontong Java Plateau Sediments

“…The contribution of eolian dust to sediments in the western equatorial Pacific Ocean site of core MR1402‐PC4 is small (Rea, 1994; Winckler et al., 2016; Wu et al., 2013). Terrigenous particles in the region studied here are considered to be mainly of fluvial origin from New Guinea (Dang et al., 2020; Wu et al., 2013). The silicate‐hosted magnetic inclusion mass‐fraction concentration in core MR1402‐PC4 is less than 2%, and carries less than 7% of SIRM (Table 2).…”

Influence of Magnetofossils on Paleointensity Estimations Inferred From Principal Component Analyses of First‐Order Reversal Curve Diagrams for Sediments From the Western Equatorial Pacific

“…The positions and water depths of these sites are presented in Table 1. Terrigenous particles in this region are considered to be mainly of fluvial origin (Dang et al., 2020; Wu et al., 2013). Riverine input mainly from the Sepik River in the northern part of New Guinea is delivered to this region by the New Guinea Coastal Undercurrent and Equatorial Under Current.…”

“… Map of the western equatorial Pacific and locations of the studied cores. Arrows show the New Guinea Coastal Undercurrent (NGCUC) and Equatorial Undercurrent (EUC) that deliver fluvial sediment particles in this region (after Dang et al., 2020). Star indicates the location of the mouth of the Sepik River.…”

Millennial‐Scale Precipitation Variability in the Indo‐Pacific Region Over the Last 40 Kyr

“…The Rb/Sr ratios in core MD01-2385 range from 0.65 to 0.95 (see (Aldrian & Susanto, 2003). Locations of millennial-scale paleoclimate reconstructions from each region are marked by symbols (circles, marine cores; squares, stalagmites; triangle, this study) and colored/labeled by region: (A-1) GeoB10053-7 (Mohtadi et al, 2011), (A-2) Gempa Bumi Cave (Krause et al, 2019), (A-3) Liang Luar Cave (Ayliffe et al, 2013;Griffiths et al, 2009), (A-4) SO185-18460 (Kuhnt et al, 2015), (A-5) SO185-18506 (Kuhnt et al, 2015), (A-6) Ball Gown Cave (Denniston et al, 2013), (A-7) MD06-3054 (Xiong et al, 2018), (A-8) MD06-3075 (Fraser et al, 2014), (A-9) GeoB17419-1 (Hollstein et al, 2018), (A-10) MD05-2920 (Tachikawa et al, 2011) and (A-11) KX15-2 (Dang, Wu, et al, 2020) from region A (red); (B-1) Borneo stalagmite (Carolin et al, 2013(Carolin et al, , 2016Partin et al, 2007) and (B-2) Tangga Cave (Wurtzel et al, 2018) from region B (green); and (C-1) MD01-2385 (9-point running mean, this study; note that only the clay mineralogy proxy is shown here), (C-2) MD10-3340 (Dang et al, 2015), and (C-3) Lake Towuti (Russell et al, 2014) Materials and Methods in Supporting Information S1; Figure 2d). Both the CIA and Rb/Sr ratios display similar long-term variations to the record of smectite/(illite + chlorite) ratios, with lower CIA and Rb/Sr ratios generally corresponding to higher smectite/(illite + chlorite) ratios (note the inverse scales for CIA and Rb/Sr ratios on Figure 2).…”

“…(a) Map showing three regions (A, B, and C) with distinct precipitation patterns (inset figures), based on monthly rainfall data from meteorological stations spanning 1961–1993 in the Global Historical Climatology Network database (Aldrian & Susanto, 2003). Locations of millennial‐scale paleoclimate reconstructions from each region are marked by symbols (circles, marine cores; squares, stalagmites; triangle, this study) and colored/labeled by region: (A‐1) GeoB10053‐7 (Mohtadi et al., 2011), (A‐2) Gempa Bumi Cave (Krause et al., 2019), (A‐3) Liang Luar Cave (Ayliffe et al., 2013; Griffiths et al., 2009), (A‐4) SO185‐18460 (Kuhnt et al., 2015), (A‐5) SO185‐18506 (Kuhnt et al., 2015), (A‐6) Ball Gown Cave (Denniston et al., 2013), (A‐7) MD06‐3054 (Xiong et al., 2018), (A‐8) MD06‐3075 (Fraser et al., 2014), (A‐9) GeoB17419‐1 (Hollstein et al., 2018), (A‐10) MD05‐2920 (Tachikawa et al., 2011) and (A‐11) KX15‐2 (Dang, Wu, et al., 2020) from region A (red); (B‐1) Borneo stalagmite (Carolin et al., 2013, 2016; Partin et al., 2007) and (B‐2) Tangga Cave (Wurtzel et al., 2018) from region B (green); and (C‐1) MD01‐2385 (9‐point running mean, this study; note that only the clay mineralogy proxy is shown here), (C‐2) MD10‐3340 (Dang et al., 2015), and (C‐3) Lake Towuti (Russell et al., 2014) from region C (blue). (b) Deglacial precipitation reconstructions in the western Indo‐Pacific region (i.e., eastern Indian Ocean).…”