K-Ar ages for the Yatani Pb-Zn-Au-Ag vein-type deposits and Otoge kaolin-pyrophyllite deposits, Yamagata prefecture, northeastern part of Japan
K-Ar ages for the Yatani Pb-Zn-Au-Ag vein-type deposits and Otoge kaolin-pyrophyllite deposits, Yamagata prefecture, northeastern part of Japan
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日本东北部山形县 Yatani Pb-Zn-Au-Ag 脉型矿床和 Otoge 高岭土-叶蜡石矿床的 K-Ar 年龄
DOI：
10.11456/shigenchishitsu1951.35.205
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
N. Shikazono
中科院分区：
文献类型：
--
作者：
N. Shikazono
三个来自八谷铅锌金银矿床不同脉体的冰长石样品的年龄分别为3.61±0.27、3.37±0.13和3.25±0.26 Ma。其中一个来自奥托格高岭土叶蜡石矿床的绢云母化岩石样品的年龄为5.16±1.95 Ma。这些结果表明：（1）八谷金银矿化的成矿时代与铅锌矿化的成矿时代基本一致;（3）在本州东北部的绿色凝灰岩地区，脉型矿化作用发生在约500 ± 200万年前。15-3 MA.
Three samples of adularia from the different veins of Yatani Pb-Zn-Au-Ag deposits give 3.61±0.27, 3.37±0.13, and 3.25±0.26 Ma. One sample of sericitized rock from Otoge kaolin-pyrophyllite deposits gives 5.16±1.95 Ma. These results indicate that (1) Age of Au-Ag mineralization in the Yatani deposits is nearly same to that of Pb-Zn mineralization in the same deposits, (2) Intense hydrothermal activities occurred at ca. 5±2 million years ago in the Yatani-Otoge mining district, and (3) Vein-type mineralizations occurred in Green tuff region of northeastern part of Honshu during a period of ca. 15-3 Ma.