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Ore-forming processes of orogenic gold deposits in the northwest Fengtai Basin, South Qinling Orogen, central China: Constraints from pyrite texture and geochemistry
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DOI：10.1016/j.oregeorev.2026.107385.png)
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Abstract
En 中文
• Five pyrite generations identified, tracing evolution from syn-sedimentary to ore-stage hydrothermal processes in Pangjiahe and Matigou orogenic gold deposits. • Sulfur isotopes of ore-stage pyrite (+8‰ to + 13‰) indicate a crustal fluid source derived from metamorphosed Devonian SEDEX-enriched strata. • Pre-existing basin-hosted SEDEX mineralization serves as a key metal source, with gold precipitation driven by fault-valve mechanisms during Triassic tectonic transition.
Keywords:
Orogenic gold deposit
Pyrite generations
Sulfur isotopes
Trace elements
SEDEX remobilization
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