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Article
Record of hydrothermal activity in the Yuhuang hydrothermal field and its implications for the Southwest Indian Ridge: evidence from sulfide chronology
The Yuhuang hydrothermal field (YHF) is located between the Indomed and Gallieni fracture zones near the top of the off-axis slope on the south rift wall of Segment 29 on the ultraslow Southwest Indian Ridge (...
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Article
Geological context and vents morphology in the ultramafic-hosted Tianxiu field, Carlsberg Ridge
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 understa...
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Article
Sulfide metallogenic model for the ultraslow-spreading Southwest Indian Ridge
Polymetallic sulfides present in mid-ocean ridges (MORs) have become important strategic resources for humans, and a scientific metallogenic model is necessary for the investigation and exploration of these re...
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Article
Control of the stress field on shallow seafloor hydrothermal paths: A case study of the TAG hydrothermal field
The stress state and rock mechanical properties govern the growth of faults and fractures, which constitute shallow hydrothermal pathways and control the distribution of seafloor massive sulfide (SMS) mounds i...
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Article
Characteristics of rare earth elements in the surface sediments of Southwest Indian Ridge: implication of grain size for the identification of hydrothermal activity
The characteristics of rare earth elements (REEs) in mid-ocean ridge (MOR) sediments are important indicators of hydrothermal activity. However, these sediments generally have multiple sources and different gr...
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Article
Fuzzy Forest Machine Learning Predictive Model for Mineral Prospectivity: A Case Study on Southwest Indian Ridge 48.7°E–50.5°E
Investigating the ocean environment where seafloor massive sulfide (SMS) deposits are located is not only technically intricate but also costly. Therefore, improving prospecting efficiency by reducing the expl...
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Article
Geological characteristics of the Qiaoyue Seamount and associated ultramafic-hosted seafloor hydrothermal system (∼52.1°E, Southwest Indian Ridge)
Hydrothermal vent incidence was once thought to be proportional to the spreading rate of the mid-ocean ridges (MORs). However, more and more studies have shown that the ultraslow-spreading ridges (e.g., Southw...
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Article
Open AccessAn intermittent detachment faulting system with a large sulfide deposit revealed by multi-scale magnetic surveys
Magmatic and tectonic processes can contribute to discontinuous crustal accretion and play an important role in hydrothermal circulation at ultraslow-spreading ridges, however, it is difficult to accurately de...
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Article
Sulfur isotopic compositions of sulfides along the Southwest Indian Ridge: implications for mineralization in ultramafic rocks
The recently explored Tianzuo hydrothermal field in serpentinized ultramafic rocks of the amagmatic segment of the ultraslow-spreading Southwest Indian Ridge displays high-temperature sulfide mineralization (i...
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Article
Experimental study on the detection of metal sulfide under seafloor environment using time domain induced polarization
The induced polarization (IP) method can play an important role in the exploration of seafloor polymetallic sulfide deposits. Compared to frequency-domain IP, time-domain IP (TDIP) requires a simpler apparatus...
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Article
Distal axis sulfide mineralization on the ultraslow-spreading Southwest Indian Ridge: an LA-ICP-MS study of pyrite from the East Long**g-2 hydrothermal field
The newly discovered East Long**g-2 hydrothermal field (ELHF-2) is located on the Dragon Horn oceanic core complex of the ultraslow-spreading Southwest Indian Ridge, approximately 12 km from the ridge axis. T...
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Article
GIS-based Mineral Prospectivity Map** of Seafloor Massive Sulfide on Ultraslow-spreading Ridges: A Case Study of Southwest Indian Ridge 48.7°–50.5° E
With the depletion of mineral resources on land, seafloor massive sulfide deposits have the potential to become as important for exploration, development and mining as those on land. However, it is difficult t...
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Article
Open AccessDeep high-temperature hydrothermal circulation in a detachment faulting system on the ultra-slow spreading ridge
Coupled magmatic and tectonic activity plays an important role in high-temperature hydrothermal circulation at mid-ocean ridges. The circulation patterns for such systems have been elucidated by microearthquak...
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Article
Open AccessMelting of recycled ancient crust responsible for the Gutenberg discontinuity
A discontinuity in the seismic velocity associated with the lithosphere-asthenosphere interface, known as the Gutenberg discontinuity, is enigmatic in its origin. While partial mantle melts are frequently sugg...
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Article
Open AccessSeafloor hydrothermal activity along mid-ocean ridge with strong melt supply: study from segment 27, southwest Indian ridge
Continuous tow investigations have shown that the present vent field inventory along fast to intermediate spreading ridges may be underestimated by at least 3–6 times, while the limited towed line investigatio...
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Article
A hydrothermal investigation system for the Qianlong-II autonomous underwater vehicle
Qianlong-II is a fully autonomous underwater vehicle designed for the investigation of submarine resources, particularly polymetallic sulfides. It was used to successfully explore hydrothermal fields on the South...
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Article
Newly discovered hydrothermal fields along the ultraslow-spreading Southwest Indian Ridge around 63°E
The ultraslow-spreading Southwest Indian Ridge (SWIR) to the east of the Melville fracture zone is characterized by very low melt supply and intensive tectonic activity. Due to its weak thermal budget and extr...
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Article
Open AccessDistribution of tetraether lipids in sulfide chimneys at the Deyin hydrothermal field, southern Mid-Atlantic Ridge: Implication to chimney growing stage
This study presents analysis of four chimney samples in terms of glycerol dialkyl glycerol tetraether lipids (GDGTs), representing different growing stages of sulfide chimneys at the Deyin hydrothermal field, ...
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Article
Time correction of the ocean bottom seismometers deployed at the southwest Indian ridge using ambient noise cross-correlation
Seismic monitoring using ocean bottom seismometers (OBS) is an efficient method for investigating earthquakes in mid-ocean ridge far away from land. Clock synchronization among the OBSs is difficult without di...
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Article
The deep structure of the Duanqiao hydrothermal field at the Southwest Indian Ridge
Polymetalic sulfide is the main product of sea-floor hydrothermal venting, and has become an important sea-floor mineral resources for its rich in many kinds of precious metal elements. Since 2007, a number of...
