Abstract:Purpose: The intricate genetic linkage between hydrocarbon accumulation and metal mineralization has garnered escalating scholarly interest. The solid bitumen, associated/adjacent to metal deposits, epitomizes the evolutionary trajectory of hydrocarbons, encapsulating pivotal data on basin fluids and acting as a quintessential medium for probing the interplay between hydrocarbon and metal deposits. The Qinglong Sb ore field in southwest Guizhou province contains a large amount of paleo-oil reservoir solid bitumen. To decipher the evolution history of hydrocarbon accumulation and antimony mineralization, the study was carried out. Method: This study employed laser Raman spectroscopy to analyze the bitumen in the host altered basalt. Result: The scatter plot delineating peak separation (WG?WD) and peak intensity ratio (ID/IG) corroborates the bitumen’s over-mature phase, with reflectance values (Rb) spanning 1.04 to 3.15, averaging at 2.36. Conclusion: The findings of the investigation reveal a synchronous hydrocarbon event characterized by the presence of bituminous substances in both the altered basalt surrounding rock and the paleo-oil reservoir located in the northwestern sector of the ore field. Furthermore, the zenith paleotemperatures of the solid bitumen, ranging from 158℃ to 299℃ (average 257℃), surpass the normative sedimentary burial heat (~200℃), chronicling an Sb mineralization thermal event. A holistic analysis infers that the paleo-gas reservoir, spawned by the Qinglong paleo-oil reservoir, was pivotal in Sb mineralization, endowing substantial reduced sulfur to the process.