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題名 | 臺東縣都蘭地區銅礦之地球化學初探=Preliminary Geochemistry Research about Copper Deposit at Dulan Area, Taitung County, Taiwan |
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作 者 | 余昱廷; 余炳盛; | 書刊名 | 臺灣鑛業 |
卷期 | 71:3 2019.09[民108.09] |
頁次 | 頁1-18 |
分類號 | 357.5 |
關鍵詞 | 都蘭山; 斑岩銅礦; 地球化學; 礦床學; 經濟地質學; Dulan; Porphyry copper deposit; Geochemistry; Mineral deposit; Economic geology; |
語文 | 中文(Chinese) |
中文摘要 | 位於臺東縣海岸山脈南段之都蘭山地區,過去曾進行過小規模的銅礦開採,如今該地以出產帶有矽孔雀石的玉髓寶石著名,未發展成大規模之金屬礦場。此地在數十年來缺乏相關之礦床研究,其背後的地質意義仍有待深入探討,隨著地球化學分析技術的進步,本文嘗試以近代之ICP-MS及火試金化驗技術,對都蘭山礦區之岩石、表土或沉積物等地表樣本進行元素定量分析,據以推論當地之地質特性以及成礦系統,以利後續研究發展。分析結果發現,都蘭山礦區在地球化學上呈現許多斑岩銅礦的特徵:首先是都蘭山礦區確實具有銅、金、銀等元素的富集,符合斑岩礦床的基本特徵。再者,基於埃達克岩與斑岩銅礦的密切關係,本研究經化學定量分析發現該地的地球化學與埃達克岩在Sr、Eu、Y、Yb等關鍵元素上有高度的相似性,增加了當地屬斑岩銅礦的可能性。此外,以元素間相關係數進行研究,都蘭山當地的化學組成符合斑岩銅礦常見的Cu-Mo-Au±Ag-As及Ba-Zn-Pb-Sb-Ag-As-Te±Bi兩套特徵性關聯元素。基於前述3點特性,本研究認為都蘭山銅礦區應屬於斑岩銅礦或是與斑岩銅礦有密切地質關係的礦床。 |
英文摘要 | Located at Taitung of eastern Taiwan Island, Dulan is a mountain area of southern Coastal Range. Although there were some exploration in the area, instead of large scale metal mining operation, Dulan area is now famous about its chrysocolla chalcedony gemstone production. The research about the mineral deposit of Dulan is lacked in recent decades. Since the geological background of the deposit was still unsolved, the research applied recent ICP-MS and fire assay analysis to rock or sediment samples from Dulan area, in order to inference the geochemical characteristic and the source of mineral deposit. The result indicated several connections from Dulan area to a porhyry copper deposit. First, the enrichment of Cu, Au, and Ag match typical commodity of porphyry deposit. Furthermore, the result of quantitative analysis implied similarity of Dulan area with adakite. Based on strong relationship between adakite and porphyry deposit, the potential that mineral deposit in Dulan area is a porphyry copper deposit could be higher. Last but not the least, correlation coefficient showed that sample from Dulan area strongly match characteristic chemical series Cu-Mo-Au±Ag-As and Ba-Zn-Pb-Sb-Ag-As-Te±Bi of porphyry copper deposit. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。