Geological context and vents morphology in the ultramafic-hosted Tianxiu field, Carlsberg Ridge

作     者：Jin Liang Chunhui Tao Xiangxin Wang Cheng Su Wei Gao Yadong Zhou Weikun Xu Xiaohe Liu Zhongjun Ding Jin Liang;Chunhui Tao;Xiangxin Wang;Cheng Su;Wei Gao;Yadong Zhou;Weikun Xu;Xiaohe Liu;Zhongjun Ding

作者机构：Key Laboratory of Submarine GeosciencesMinistry of Natural ResourcesHangzhou 310012China Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China School of OceanographyShanghai Jiao Tong UniversityShanghai 200030China National Deep Sea CenterQingdao 266237China School of Earth SciencesZhejiang UniversityHangzhou 310027China Ocean CollegeZhejiang UniversityZhoushan 316021China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2023年第42卷第9期

页      面：62-70页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：The National Key Research and Development Program of China under contract No. 2017YFC0306603 the National Key Research and Development Program of China under contract No. 2021YFC2801705 the Scientific Research Fund of the Second Institute of Oceanography Ministry of Natural Resources under contract Nos JG1905 and SZ2201 the National Natural Science Foundation of China under contract No. 41806076 

主　　题：hydrothermal activity sulfide accumulation morphology ultramafic-hosted Carlsberg Ridge 

摘      要：The Tianxiu hydrothermal field(TXHF) located on Carlsberg Ridge is one of the few active ultramafic-hosted venting systems known in the Indian Ocean. Despite numerous investigations, there is limited understanding of its sulfide structure morphology, and the factors controlling the formation of TXHF are poorly understood. In this study, we conducted detailed seafloor mapping using visual data obtained by dives using the human-occupied vehicle(HOV) Jiaolong. The TXHF is found to be an active, off-axis, ultramafic-hosted, high-temperature hydrothermal area in which serpentine peridotite is exposed. Two main hydrothermal sites were identified, i.e., P and Y, both of which feature a complex of chimneys and beehive diffusers constituting a “chimney jungle and isolated large steep-sided structures developed on flat-lying sulfide mounds. In addition, some sporadic inactive chimneys and outcrops of hydrothermal deposits were noted. The chimneys are rich in Fe and Zn sulfide, and lack the central fluid channel formed by focused high-temperature fluid flow. Hydrothermal venting at TXHF is likely related to low-angle detachment faults that focus and transport hydrothermal fluids away from a heat source along the valley wall. Our results complement and expand upon previous works concerning sulfide chimney morphology and their corresponding mineral paragenesis in ultramafic-hosted hydrothermal systems in the Indian Ocean and further our understanding of modern seafloor hydrothermal systems.