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Tectono‐Magmatic Activization and Fractal Dynamics of Ore‐Forming of Hydrothermal Uranium Deposits in South China
Author(s) -
XIE Yanshi,
TAN Kaixuan,
TANG Zhenping,
HU Yang,
LI Chunguang,
WANG Zhaozhao,
YANG Fei,
YIN Jianwen
Publication year - 2014
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12385_47
Subject(s) - china , resource (disambiguation) , engineering , geography , archaeology , computer science , computer network
South China is located in the southeastern margin of the Eurasian continent and on the verge of the Western Pacific and which include the Southeast Diwa region and the Kiangnan Diwa region. From Early Devonian to Middle Triassic Epoch, a series of stable carbonate rocks, coalbearing sandstone and shale build had deposited in South China within a long-term Platform evolution stage. Starting from the late Triassic, the tectonic evolution in South China transformed into Diwa stage and widespread and intense tectono-magmatic activization occurrence in the region. Especially during the Cretaceous-Tertiary as a result of crustal extension, a series of NE-NNE and NW trending deep fractures and rifted basins had taken shape and brought many important hydrothermal uranium deposits. Carbonaceous-siliceous-pelitic rock type (CSPRT), granite type and volcanic type hydrothermal uranium deposits in South China arise in turn from west to east. CSPRT uranium deposits mainly distributed on either side of Kiangnan ancient land that controlled by high uranium content carbonaceous-siliceous-pelitic rock sequence. Granite type uranium deposits mainly distributed in late Caledonian uplift zone in South China that controlled by high uranium content granite rock. Volcanic type uranium deposits mainly distributed on the marginal areas of continental plates in east of late Caledonian uplift zone in South China that controlled by high uranium content intermediate-acid volcanic rock. There were two ubiquitous features in all kinds of uranium deposits in South China which included spatial close correlation between uranium deposits and Mesozoic-Cenozoic rifted basins and faults and relative concentration of metallogenic epoch that from Cretaceous to Tertiary the same with the red rifted basins and show a metallogenic series in extensional structure system. For example, the granite type and volcanic type uranium mineralization in the east of Kiangnan ancient land controlled by NE trending Rong’anxupu and Sibao-xupu deep fractures and the granite type and CSPRT uranium mineralization in the north of Kiangnan ancient land controlled by ChangshouHengyang-Guanyinge deep fracture.