Insights into the formation of a low heat flow geothermal system: integrated geochemical and geophysical evidence from Anjiazhuang, China - Weizun Zhang; Yuanzhi Cheng; Meng Wang; Hui Zou; Liang Qie; Yizhuo Dong; Xiaoxiao Zhang; Jing Wang; Shuyang Wang; Qitao Ding; Jiabin Duan; Yulie Gong; et al. (Geothermics, 2026)