| Institute of Geomechanics, Chinese Academy of Geological Sciences | Host |
| Citation: |
HUANG Ren-sheng. IGNEOUS SERIES AND EPITHERMAL PORPHYRY Cu-Au-Ag MINERALIZATION SYSTEM IN THE ZIJINGSHAN ORE FIELD, FUJIAN PROVINCE[J]. Journal of Geomechanics, 2008, 14(1): 74-86.
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IGNEOUS SERIES AND EPITHERMAL PORPHYRY Cu-Au-Ag MINERALIZATION SYSTEM IN THE ZIJINGSHAN ORE FIELD, FUJIAN PROVINCE
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Abstract
The rocks in the Zijingshang ore field are from the surface to depth as follows:Lower Cretaceous intermediate-acid volcanic rocks, subvolcanic dacite-porphyry, hypabyssal granodioriteporphyry and middle-and deep-level porphyritic granodiorite, forming an intermediate-acid volcanicintrusive sequence. Strong alteration-mineralization occur around the Zijinshan volcanic edifice, forming high-sulfur epithermal Cu-Au deposits, low-sulfur epithermal Ag-Au deposits and porphyry Cu (Mo) deposits. In the ore field, various types of Cu-Au-Ag deposit have close temporal-spatial and material source relations. They evolved continuously in terms of time and space and are products of consanguineous ore-bearing intermediate-acid magmas in the same background of mineralization but in different stages of evolution. The occurrence of different types of ore deposit in diverse geological positions depended on the physico-chemical properties and temporal-spatial migration of ore fluids, thus forming an epithermal porphyry Cu-Au-Ag mineralization system related to intermediate-acid subvolcanic rocks and porphyry.
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Keywords:
- epithermal /
- porphyritic type /
- Cu-Au-Ag deposit /
- mineralization system /
- Zijingshan ore field
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References
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HUANG Ren-sheng. IGNEOUS SERIES AND EPITHERMAL PORPHYRY Cu-Au-Ag MINERALIZATION SYSTEM IN THE ZIJINGSHAN ORE FIELD, FUJIAN PROVINCE[J]. Journal of Geomechanics, 2008, 14(1): 74-86.
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Figure 1.
Schematic map showing hydrothermal alteration-mineralization zoning in the Zijinshan ore field
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Figure 2.
Chondrite-normalized REE patterns of magmatic rocks in the Zijinshan ore field.A.Host rock Yanshanian granite; B.Yanshanian granodiorite and Lower Cretaceous volcanic rocks; C.granodiorite porphyry and altered dacite porphyry
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Figure 3.
AFM plot of magmatic rocks in the Zijinshan ore field (A =Na2O+K2O, F=FeOt, M =MgO)
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Figure 4.
Time (t)- (87Sr/86Sr)i (I0)plot of magmatic rocks in the Zijinshan ore field (t=age of rock)
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Figure 5.
Geological section along Bitian-Luoboling of the Zijinshan ore field
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Figure 6.
Hydrogen and oxygen isotopic compositions of water in fluid inclusions from the Zijinshan ore field
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Figure 7.
Ore-forming model and ore-forming system of the Zijinshan Cu-Au-Ag field