Focused Fluid Flow, Shallow Gas Hydrate, and Cold Seep in the Qiongdongnan Basin, Northwestern South China Sea

Figure 1

(a) The study area in the QDNB and (b) its corresponding amplified map. The black lines in panel (a) mark the boundary of the QDNB. The gray, orange, and yellow areas indicate sags, uplifts, and low uplifts in the basin, respectively. The red and blue rectangles show the study area and the GMGS5 drilling area, respectively. The red and blue stars label the newly discovered and “Haima” cold seeps, respectively. The black and green lines in panel (b) mark the seismic lines and echogram, respectively. The blue, cyan, and green areas indicate the locations of Figures 5(b), 5(d), and 6(d), Figure 7(e), and Figure 6(b), respectively. BJS: Beijiao Sag; BDS: Baodao Sag; CCS: Changchang Sag; GQS: Ganquan Sag; HGS: Huaguang Sag; LDS: Ledong Sag; LSS: Lingshui Sag; SDS: Songdong Sag; SNS: Songnan Sag; SXS: Songxi Sag; YBS: Yabei Sag; YNS: Yanan Sag; BJU: Beijiao Uplift; STU: Songtao Uplift; YCU: Yacheng Uplift; YLU: Yongle Uplift; LNLU: Lingnan Low Uplift; LSLU: Lingshui Low Uplift; SNLU: Songnan Low Uplift.