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- Title
Metallogenic Characteristics and Exploration Prediction of Au-Mo Polymetallic Deposits in Xiaoqinling Area.
- Authors
WANG Rui-ting; YUAN Hai-chao; MENG De-ming; WANG Lei; MA Wen-ping
- Abstract
Xiaoqinling area is an important Au-Mo mineral base in China. Based on the tectonic-magmatic-metallogenic system, the Au-Mo polymetallic deposits in Xiaoqinling area can be divided into two metallogenic series: Au (Mo) deposits related to remelting granite magmatic intrusion, and Mo (Au-W) deposits related to deep-hypabyssal granites and alkaline rocks in Indosinian-Yanshanian. The main types of Au (Mo) deposits include quartz vein, structural altered rock-host, mylonite, explosive breccia, composite rock, etc. , and the first two types are predominant. The main types of Mo (Au-W) deposits include porphyry, porphyry-skarn, porphyry-explosive breccia, quartz-carbonate vein, structural altered rock-host, etc. , and the first two types are also predominant. There are three magmatic intrusion activities accompanied by different degrees of Mo-Au mineralization since Triassic, corresponding to three different peaks of Mo-Au mineralization. Mo mineralization epoch includes Indosinian (210-220 Ma), the early stage of Early Cretaceous (140-145 Ma) and the middle-late stage of Early Cretaceous (110-138 Ma) in Yanshanian; Au mineralization epoch includes Indosinian (about 220 Ma) and the middle-late stage of Early Cretaceous in Yanshanian (about 130 Ma) ; Mo and Au mineralizations coincide in Indosinian and the middle-late stage of Early Cretaceous in Yanshanian, but separate in the early stage of Early Cretaceous in Yanshanian. Characteristics of intrusion and fault tectonic ore-controlling are obvious, and Au-Mo mineralization in Yanshanian is strong in Xiaoqinling area as a whole. The favorable prospecting targets for Au-Mo polymetallic in Xiaoqinling area are Wawagou-Yu'ergou, Yu'ergou-Caojiagou, Taiziping-Hulugou-Huangdigou and the northern slope of Wengongling, and the ore-bearing potential evaluation of intermediate-acid small intrusion should be paid attention to.
- Publication
Journal of Earth Sciences & Environment, 2014, Vol 36, Issue 1, p19
- ISSN
1672-6561
- Publication type
Article