臺灣中央山脈的金礦

Potentials of the Gold Deposits in the Central Range, Taiwan

譚立平(L. P. Tan) ； 倪肇明(C. M. Ni)

《鑛冶：中國鑛冶工程學會會刊》 31卷3期 (1987/09) Pp. 37-46

https://doi.org/10.30069/MM.198709_31(3).0002

摘要

臺灣中央山脈的砂金散布面積南北長300公里，寬70公里。由北至南，主要分布在大濁水北溪、屏風山、卓社大山、及玉山等四區。每區南北長20至30公里，寬10至15公里。金礦床均為含自然金與黃鐵礦之石英脈，在已調查之屏風山及大濁水北溪區，毒砂與磁黃鐵礦亦普遍。圍岩包括中生代大南澳片岩、始新世之畢祿山層及達見砂岩、漸新世（？）之四稜砂岩、及中新世之廬山層。含金石英脈横切在廬山層中之區域變質石英脈，因此含金石英脈之生成年代非常年青，與金瓜石之金銅礦者極接近。

並列摘要

The placer gold in the Central Range occurs in a N-S belt 300 km long with a width of 70 km. The gold was mainly found in four districts which are, from north to south, North Tachoshui Stream, the Pingfengshan, the Tsoshehtashan, the Yushan. Each district has a N-S length of 20 to 30 km and a width of 10 to 15 km. The known gold deposits consist of quartz veins with native gold and pyrite. In the investigated Pingfengshan and North Tachoshui Stream districts, arsenopyrite and pyrrhotite are also common. The wallrocks of the gold-quartz veins include Mesozoic, Eocene, Oligocene, and Miocene formations. The gold-quartz veins cut the regional-metamorphic quartz veins in the Miocene Lushan Formation which was metamorphosed possibly in early Pleistocene, therefore, the age of the gold-quartz veins is very young, close to that of the gold-copper deposits of the Chinkuashih district.