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湘南地区泥盆系发育齐全,沉积连续,并具陆表海的沉积特征。本文研究的四马桥向斜上泥盆统中,还产有著名的后江桥铅锌菱铁锰礁控矿床。向斜西翼泥盆纪早期及中期跳马涧组沉积相为陆相一滨海相。中期棋梓桥组为滨海相海滩一滨岸海盆亚相。泥盆纪晚期佘田桥组下部为较大的海侵阶段,属相虽与棋梓桥组相同,但海水逐渐加深,并形成缺氧环境,随后又出现台地局限浅海亚相生物礁微相;中部为缓慢海退阶段,出现台地局限浅海亚相生物滩微相、泻湖微相,含矿层位于下段;上部为较大的持续海退阶段,出现鲕粒滩及核形石滩。泥盆纪晚期锡矿山组包括四期海退式小旋回。
The Devonian in southern Hunan developed well and deposited continuously with the depositional characteristics of land surface sea. In the study of the Simama anticline Upper Devonian, also produced the famous post-river bridge lead-zinc-iron ore manganese reef deposit. The anticline West Wing Early Devonian and Middle Jiaomajian Sedimentary facies are continental facies. Mid-Qizzi bridge group for the coastal phase of a coastal basin basin subfacies. The lower part of the Shetianqiao Formation in the late Devonian was a large transgression stage, belonging to the same group as the Qizziqiao Formation but with gradually deepening seawater and an anoxic environment, followed by the formation of the superficial shallow marine reef microfacies. In the middle part of China, the slow sea-rending stage resulted in the limitation of the microfacies and lacustrine microfacies in the Shahejie Formation, and the lower ore-bearing strata in the lower part of the platform. Late Devonian tin mines include four small-scale retreats.