The significance of the distribution patterns of certain elements in the stream sediments of the St. Austell granite mass, Cornwall

• 발행기관: 대한자원환경지질학회
• 저자명: Jae Yeong Lee(李在英) Simon Kaine Olinze
• 간행물 정보: 『자원환경지질』2권 4호, 23~71쪽, 전체 49쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1969.12.30

국문 초록

聖 오-스텔花崗岩塊를 硏究對象으로하여 本地域에 發達한 主要河川에서 各各 約 1/2 mile 間隔마다 漂砂를 採取하여 이를 乾燥하고 80mesh(B.S.S. 單位)채에 通過시켜 粒度가 -80＃에 該當하는 試料만을 分析試料로써 Na, K, Li, P, Ni, Cr, Sn, W, As, Cu, Zn, Pb의 含量을 分析하였다. 本硏究의 目的은 上記한 數個의 化學元素가 보이는 地球化學的 分布型을 檢討하고 貫入順序가 다른 本花崗岩塊의 數個의 相과 鑛化作用을 比較硏究하는 데 있었다. 硏究의 結果는 本花崗岩이 2個의 主貫入花崗岩으로 構成되어 있다는 Exley氏의 硏究와 一致하였다. 卽本花崗岩塊는 前期의 花崗岩이 本地域의 西部에서 後期의 貫入花崗岩에 衣하여 接觸되어 있다. 本硏究中 grid deviation에 依한 方法은 本花崗岩塊의 性質에 關한 地化學的 資料를 얻는데 매우 有用하였으나 frequency diagram은 顯著한 도움이 되지 못하였다. 旣存鑛脈이 發達하여 있는 地域의 河川은 거의 모두가 異常値를 나타냈는데 이것은 過去의 鑛山作業時 流入되여온 tailing에 基因된것으로 結論되었다.

영문 초록

Sediment samples were taken at about half-mile intervals from all the inajor rivers draining the St. Austell granite mass. The minus 80 mesh(B.S.S.) fraction of each sample was analysed, using semiquantitative methods, for sodium, potassium, lithium, phosphorus, nickel, chromium, tin, tungsten, arsenic copper, zinc and lead. The work was carried out with the view to gaining further information as to the geographical distribution of such different granite fades as might axist, and to investigate the geochemical dispersion of these elements with relation to mineralisation in this area. The sesults confirm Exley’s suggestion that the mass consists of two major granite intrusions, the earlier undifferentiated one is joined on the west by a later differentiated intrutive. During the work grid deviation maps proved particularly useful in obtaining data concerning the nature of the granite but frequency diagrams were not particularly helpful. All the known lode areas were associated with stream sediments containing anomalously high concentrations of lode metals and it is concluded that these high concentrations are due premarily to lode material transferred to the streams in the form of tailings lost during milling operations.

목차

ABSTRACT

OBJECTS OF THE PRESENT INVESTIGATION

LIST OF MAPS

TOPOGRAPHY AND DRAINAGE

GENERAL GEOLOGY

ANALYTICAL METHODS

POSSIBLE SOURCES OF SEDIMENT CONTAMINATION IN THE ST. AUSTELL AREA.

DISCUSSION OF RESULTS

CONCLUSIONS

REFERENCES

要約

APPENDIX