Abstract
Disputes over the tectonic setting of the volcanic rocks of the Carboniferous Dahalajunshan Formation in the Western Tianshan Mountains mainly focus on “island arcs” or “continental rifts.” In recent years, analyzing geochemical data based on machine learning method and inferring the tectonic background of basalt is one of the important development directions in the application of geological big data technology. In this paper, 30 elements are selected in a targeted manner, and a total of 5683 basalt samples are obtained from two types of tectonic backgrounds, including island arcs and rifts, of which 4595 samples of island arcs and 1088 samples of rifts are used as samples. The random forest algorithm is used for model training and subsequent prediction of the tectonic background of the Dahalajunshan Formation. The prediction results show that most of the Dahalajunshan Formation volcanic rocks were mainly formed in the island arc environment, and these rocks appeared during the closure of the oceanic basin in the Late Paleozoic. However, a few samples have a high probability of rift valley, which may indicate that they are in the transition from subduction to collision. Through further analysis of the predicted results, it can be inferred that the Dahalajunshan Formation was formed in an active continental margin environment, and was appeared in the final stage of plate subduction-collision from northwest to southeast. The advantage of the new method used in this paper is that it can predict the tectonic background more accurately, and open up ideas for further research on the origin of magmatic rocks, and it can be popularized in the field of geology, and it can promote the further development of geological big data experimental technology.
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Zhen Chen conceived the analysis and wrote the manuscript; Qingsong Wu conceptualized and critically revised the manuscript; Sipeng Han provided scientific drawing; Jungui Zhang, Peng Yang, **ngwu Liu and Mingde Lang provided technical support on the method and critically revised the manuscript.
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Chen, Z., Wu, Q., Han, S. et al. The metallogenic tectonic implication of the volcanic rocks of the Dahalajunshan Formation in the Early Carboniferous in the West Tianshan based on big data analytics. Arab J Geosci 15, 1658 (2022). https://doi.org/10.1007/s12517-022-10943-4
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DOI: https://doi.org/10.1007/s12517-022-10943-4