臺灣玉礦研究：過去、現在、未來

The Study of Taiwan Jade: Past, Present and Future

俞震甫(Tzen-Fu Yui)

《國立臺灣博物館學刊》 69卷1期 (2016/03) Pp. 3-15

https://doi.org/10.6532/JNTM.2016.69(1).02

摘要

花蓮豐田地區的閃玉，亦被稱為臺灣玉，是該地區蛇紋岩與其圍岩（片岩）間經鈣富集換質作用的產物。閃玉形成的年代為3.3±1.7百萬年前，相關的換質作用可能發生於呂宋島弧－歐亞大陸邊緣碰撞所引發的岩體抬升時期。本文回顧了過去臺灣玉相關的研究結果，並嘗試指出未來可能的研究議題。在1991年以前，有關豐田地區閃玉的研究工作多著重於蛇紋岩與閃玉的野外分布調查，相關的礦物學與岩石學工作，以及地球化學與穩定同位素組成特徵的初步了解。近年的工作則著重於元素鈣的來源探討以及換質作用發生的年代分析。雖然目前對臺灣玉的形成過程已有相當程度的了解，一些區域地質構造變化、透輝石岩形成與換質作用中鈣富集的確實反應機制、以及豐田地區蛇紋岩特性的區域變化等細節，尚待未來更進一步的工作。

關鍵字

閃玉 ； 蛇紋岩 ； 臺灣玉 ； 換質作用 ； 豐田（花蓮）

並列摘要

Nephrite from the Fengtien area, Hualien, also known as the Taiwan Jade, is a Ca-enrichment metasomatic reaction product between serpentinite and country-rock schist. The nephrite formation processes might have taken place at 3.3±1.7 Ma, during rock exhumation triggered by Luzon arc-Eurasian continental margin collision. This paper reviews results of previous studies and also tries to highlight the future research targets. It is shown that research work that had been conducted before 1991 mainly focused on field mapping, mineralogical and petrological studies, as well as preliminary geochemical and stable-isotope characterizations. Recently, studies have been mainly directed to the problems of Ca-source and formation age. Nonetheless, many details, regarding regional structure, reaction mechanisms for diopsidite formation and Ca-enrichment metasomatism, and the characteristic variation of serpentinite over the area, are yet to be explored.

並列關鍵字

nephrite ； serpentinite ； Taiwan Jade ； metasomatism ； Fengtien (Hualien)

參考文獻

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