ESTIMATION OF FORMATION TEMPERATURE FOR THE TAISHU, TOYOHA AND KAMIOKA Pb-Zn DEPOSITS ON THE BASIS OF SULFUR ISOTOPE TEMPERATURE SCALE
ESTIMATION OF FORMATION TEMPERATURE FOR THE TAISHU, TOYOHA AND KAMIOKA Pb-Zn DEPOSITS ON THE BASIS OF SULFUR ISOTOPE TEMPERATURE SCALE
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基于硫同位素温标的大树、丰叶和神冈铅锌矿床地层温度估算
DOI：
10.2465/ganko1941.72.103
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
N. Nakai
中科院分区：
文献类型：
--
作者：
Y. Kiyosu;N. Nakai
本文通过对台州、丰叶、神冈铅锌矿床中闪锌矿和方铅矿共生体的~（34）S/~（32）S比值的测定，推测了成矿存款温度。与方铅矿相比，闪锌矿样品中的~（34）S均明显富集。硫同位素分馏之间的闪锌矿和方铅矿的范围从1.5 - 2.0 permil在Taishu和神冈矿床，而在丰叶矿床的范围大多从2.5至3.0 permil。丰叶矿床早期脉体中共存样品的分馏作用小于晚期脉体。使用这些同位素分馏和实验温标（Kiyosu，1973），估计神冈矿床的形成温度为350°至400°C，太州矿床为300°至350°C，丰叶矿床为200°至250° C。这些同位素温度略高于石英和闪锌矿流体包裹体确定的填充温度。
The 34S/32S ratios of coexisting sphalerite and galena from Taishu, Toyoha and Kamioka Pb-Zn ore deposits have been measured to estimate the temperature of formation of ore deposit. All of the sphalerite samples were enriched in 34S compared with galena. Sulfur isotopic fractionation between sphalerite and galena ranges from 1.5 2.0 permil in the Taishu and Kamioka deposits, while in the Toyoha deposits ranges mostly from 2.5 to 3.0 permil. The fractionation of coexisting samples from early stage vein in Toyoha deposits is smaller than those from later stage vein. Using these isotopic fractionations and experimental temperature scale (Kiyosu, 1973), the temperature of formation is estimated to be 350° to 400°C in Kamioka deposits, 300° to 350°C in Taishu deposits and 200° to 250° in Toyoha deposits. These isotopic temperatures are slightly higher than filling temperatures determined from fluid inclusions of quartz and sphalerite.