Geothermal resource is indispensable as a clean, renewable, stable and cheap resource. Nowadays in China, the Gonghe Basin, located in northeastern Qinghai Province, has been thought to be a promising geothermal area. To explore geothermal energy potential in and around the Gonghe Basin, geophysical means including magnetic and gravity methods were used to plot distribution. Firstly, we inversed Moho depth and Curie point depth in and around the basin using gravity and magnetic data, respectively, through an improved Parker-Oldenburg algorithm. Secondly, seven different thermal models were established, considering radiogenic heat, basement depth, anomalous heat source and simulated corresponding temperature field and heat flow. These were analyzed numerically and we found the high heat flow in the Gonghe Basin coacted with radiogenic heat, an anomalous heat source and conductive heat. The distribution of seismic activities indicates that the Langshan-Wuwei-Gonghe Fault might have provided channels for transporting heat effectively.

<p>The Dome Fuji (DF) region in Antarctica is a potential site for holding an ice record older than one million years. Here, we combine the internal airborne radar stratigraphy with a 1-D inverse model to reconstruct the age field of ice in the DF region. As part of the Beyond EPICA - Oldest Ice reconnaissance (OIR), the region around DF was surveyed with a total of 19000 km of radar lines in the 2016/17 Antarctic summer. Internal stratigraphy in this region has now been traced. Through these tracked radar isochrones, we transfer the age-depth scale from DF ice core to the adjacent 500 km<sup>2</sup> region. A 1-D inverse model has been applied at each point of the survey to extend the age estimates to deeper regions of the ice sheet where no direct or continuous link of internal stratigraphy to the ice cores is possible, and to construct basal thermal state and accumulation rates. Through the reliability index of each model, we can evaluate the reliability of the 1-D assumption. Mapped age of basal ice and age density imply there might exist promising sites with ice older than 1.5 million years in the DF region. Moreover, the deduced basal state, i.e., melting rates and stagnant ice provide constraints for finding old-ice sites with a cold base. The accumulation rate ranges from 0.014 to 0.038 m a<sup>-1</sup> (in ice equivalent) in the DF region, which is also an important criterion for potential old ice.</p>

With the rapid development of city construction, it’s necessary to make archaeological exploration process more convenient, efficient and undamaged. As a result, some geophysical methods begin to be used firstly to find anomaly roughly during exploration. Ground penetrating radar (GPR), as a non-destructive and high-resolution method, should be an effective method in relatively shallow archaeological exploration. To verify the effectiveness of GPR, this paper mainly discusses the application of a combining method of GPR and Luoyang Spade – a traditional archaeological method at pre-Qin period site in Shi Village, Xia County, Yuncheng City, Shanxi Province, used GPR to find the anomaly area, then used Luoyang Spade to excavate to verify. This method can greatly shorten exploration time and reduce damage of culture relics.