Studying the Depth Structure of the Kyrgyz Tien Shan by Using the Seismic Tomography and Magnetotelluric Sounding Methodsстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 29 апреля 2021 г.
Аннотация:This paper presents new results of detailed seismic tomography (ST) on the deep structure
beneath the Middle Tien Shan to a depth of 60 km. For a better understanding of the detected
heterogeneities, the obtained velocity models were compared with the results of magnetotelluric
sounding (MTS) along the Kekemeren and Naryn profiles, running parallel to the 74 and 76 meridians,
respectively. We found that in the study region the velocity characteristics and geoelectric
properties correlate with each other. The high-velocity high-resistivity anomalies correspond to the
parts of the Tarim and Kazakhstan-Junggar plates submerged under the Tien Shan. We revealed
that the structure of the Middle Tien Shan crust is conditioned by the presence of the Central Tien
Shan microcontinent. It manifests itself as two anomalies lying one below the other: the lower
low-velocity low-resistivity anomaly, and the upper high-velocity high-resistivity anomaly. The
fault zones, limiting the Central Tien Shan microcontinent, appear as low-velocity low-resistivity
anomalies. The obtained features indicate the fluid saturation of the fault zones. According to the
revealed features of the Central Tien Shan geological structure, it is assumed that the lower-crustal
low-velocity layer can play a significant role in the delamination of the mantle part of the submerged
plates.