A Geophysical Model of the Malmyzh Ore Cluster (Sikhote-Alin) Based on Magnetic and Gravity Anomaly Data

• Published in: Doklady earth sciences Vol. 506; no. 2; pp. 790 - 797
• Main Authors: Nosyrev, M. Y., Didenko, A. N., Gilmanova, G. Z.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-10-2022; Springer; Springer Nature B.V
• Subjects: Analysis; Basins (Geology); Clusters; Copper; Copper ores; Depth; Diorite; Earth and Environmental Science; Earth Sciences; Fluvial deposits; Fluvial sediments; Geophysics; Gold; Gravitational fields; Gravity anomalies; Mathematical models; Mineralization; Modelling; Porphyry; Ring structures; Sedimentary basins; Malmyzh copper–porphyry deposit; Sikhote-Alin orogenic belt; density model; deep structure; magnetic model
• ISSN: 1028-334X; 1531-8354
• DOI: 10.1134/S1028334X22800029

Based on analysis of anomalous magnetic and gravity fields, magnetic (to a depth of 18 km) and density (to a depth of 35 km) depth models were calculated for the Malmyzh and Poni–Mulino gold–copper–porphyry ore clusters located in the northern part of the Middle Amur sedimentary basin. A ring structure of magmatogenic origin has been distinguished, which determines the spatial location of mineralization in the Malmyzh and Poni–Mulino ore clusters. This structure can be considered as a promising area for searching for gold–copper–porphyry ore mineralization. In addition, a number of promising areas associated with granitoid and diorite intrusions developed along the periphery of the ring structure can be identified. Some of these intrusions are under the Amur River and are overlain by the sedimentary cover of the Middle Amur sedimentary basin. The calculated geophysical depth model for the Malmyzh ore cluster is consistent with the petrological models of giant Cu-porphyry deposits.