| Fluid Inclusion Studies of the Skarn—type Tin Mineralization at Red—A—ven,Northwest Dartmoor,England |
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| 引用本文： | 彭齐鸣 A.V.BROMLEY.Fluid Inclusion Studies of the Skarn—type Tin Mineralization at Red—A—ven,Northwest Dartmoor,England[J].中国地球化学学报,1992,11(4):362-369. |
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| 作者姓名： | 彭齐鸣 A.V.BROMLEY |
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| 作者单位： | [1]DepartmentofGeology,ChangchunCollegeofGeology,Changchun130061 [2]CamborneSchoolofMines,PoolRedruth,Cornw |
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| 摘 要： | Two principal hydrothermal events have been recognized ,which resulted in the tin-bearing skarns at Red-A-ven ,Northwest Dartmoor.Tin was enriched during both the early (occurring as tin-bearing andradite) and late hydrothermal events (mainly as malayaite stannite and cassiterite,accompanied by boron silicates and minor tungsten).Thermometric measurements of fluid inclusions in diopside,garnet,malayaite,tourmaline-quartz and axinite were carried out,suggesting that the early skarns were formed at the temperature above 600℃and the salinities ranging from 10 to 20 wt.% NaCl eq.while the late skarns at the temperatures of 350-460℃ and the salinities ranging from 30 to 50wt.% NaCl eq.The estimated minimum depths are 2856m(850 bar) for the early event and 2526m(185 bar) for the late event.The birefringence of the andradite might be related with the superimposition of late hydrothermal fluids.
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| 关 键 词： | 流体包裹体 锡矿床 硅卡岩 成矿作用 英国 达特姆尔高原 |
Fluid inclusion studies of the skarn-type tin mineralization at Red-A-ven,Northwest Dartmoor,England |
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| Qiming Peng,A. V. Bromley.Fluid inclusion studies of the skarn-type tin mineralization at Red-A-ven,Northwest Dartmoor,England[J].Chinese Journal of Geochemistry,1992,11(4):362-369. |
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| Authors: | Qiming Peng A V Bromley |
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| Institution: | (1) Department of Geology, Changchun College of Geology, 130061 Changchun;(2) Camborne School of Mines, Pool, Redruth, RT15 3SE Cornwall, UK |
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| Abstract: | Two principal hydrothermal events have been recognized, which resulted in the tin-bearing skarns at Red-A-ven, Northwest Dartmoor.
Tin was enriched during both the early (occurring as tin-bearing andradite) and late hydrothermal events (mainly as malayaite
stannite and cassiterite, accompanied by boron silicates and minor tungsten). Thermometric measurements of fluid inclusions
in diopside, garnet, malayaite, tourmaline-quartz and axinite were carried out, suggesting that the early skarns were formed
at the temperature above 600 °C and the salinities ranging from 10 to 20 wt. %NaCl eq., while the late skarns at the temperatures
of 350–460°C and the salinities ranging from 30 to 50 wt. % NaCl eq. The estimated minimum depths are 2856 m (850 bar) for
the early event and 2526 m (185 bar) for the late event. The birefringence of the andradite might be related with the superimposition
of late hydrothermal fluids. |
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