## 1 Introduction
The analysis of the 222 Rn emanation field is of significant importance in geochemical, geophysical, and geodynamic studies [25; 26; 27; 28; 29], as well as in the search for mineral deposits, including non-radioactive ones, such as kimberlites [30]. Consequently, emanation imaging enables the identification of faults that are currently permeable to underground gases but which are concealed beneath sediments [31]. The potential for integrating MSM and radiometric techniques was explored using the Chidvinskaya pipe of the Chidvinskayic field of the ADP [30] as a case study. The results of this test demonstrated the consistency of subvertical fractured zones with radio-geochemical anomalies and deep structure. Nevertheless, the experiment was conducted on a single object and along a single profile. A more detailed examination was conducted on the Lomonosov and Verhnetovskaya pipes. As a consequence, the characteristics of the control structures and the deep structure of the pipes have been identified [15; 20]. Conversely, the composition, age, and physical properties of pipes vary between different kimberlite fields. Consequently, more reliable conclusions can be drawn by continuing the verification process on a wider range of pipes within the ADP. One of the key elements of the diamond deposits is kimberlite-controlling faults. The study of such structures can significantly increase the efficiency of exploration work. On the other hand, the study of control faults is difficult due to the complex geological structure. In particular, faults are narrow disturbances often located at great depths, which significantly complicates their study. Obviously, it is advisable to use new methods to study control structures. In particular, the example of previously conducted work shows that faults near kimberlite pipes are confidently identified by the MSM method [15; 20; 30]. At the same time, anomalous radon flux values are observed at the intersections of faults with the pipe. The listed factors indicate that when using a set of these methods, it is possible to study not only the pipe but also the faults associated with the pipe. To date, only two diamond deposits of the ADP have been identified: Lomonosova and Griba. The set of passive seismic and radiometric methods has been tested on a number of kimberlite pipes. In particular, the set has been tested on the pipes of the Lomonosova deposit. The Griba deposit has not been previously investigated. Concurrently, the Griba deposit is the highest diamond-bearing pipe in the ADP [2]. Therefore, it was important to conduct research at the Griba deposit. The Griba deposit consists of one pipe, which is currently being developed, which precludes the implementation of a set of methods on it. Consequently, the Volchya kimberlite pipe was selected as the test object due to the fact that the pipe is located close to the Griba deposit. Additionally, the Volchya pipe's intricate shape allows testing the capabilities of methods for identifying deep structure features. Thus, the aim of this study was to determine the characteristics of kimberlite-controlling faults and pipes in the area of the Griba deposit based on data from a complex of passive seismic and radiometric methods.