Garnet-orthopyroxene geothermometer and geological applications

• 발행기관: 대한자원환경지질학회
• 저자명: Han Yeang Lee(李漢永)
• 간행물 정보: 『자원환경지질』21권 1호, 29~46쪽, 전체 18쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1988.02.28

국문 초록

석류석과 사방휘석의 평형관계를 20-45kb, 975-1400℃, FMAS시스템에서 상호역반응 실험을 통해서 연구하였으며 반응 촉매제로써 사용한 PbO와 0.55 PbF₂의 혼합물은 매우 효과적이었다. Fe-Mg의 교환반응은 이 실험온도, 압력범위 내에서는 조성성분의 영향을 받지 않는다. 실험결과와 석류석의 혼합모델을 사용한 석류석-사방휘석의 지질온도계는 다음과 같다. T℃=(1971+11.91P(Kb)+1510(XCa+XMn)Gt)/(InKD+0.96)-273

영문 초록

Equilibrium relations between garnet and orthopyroxene have been investigated by reversal experiments in the range of 20-45Kb and 975-1400℃ in the FeO-MgO-Al₂O₃-SiO₂(FMAS) system. A mixture of PbO with about 55 mol per cent PbF₂ was used as a flux and proved very effective. The Fe-Mg exchange reaction seems to have little or no compositional dependence at these conditions. Combination of the experimental results with the garnet mixing model of Ganguly and Saxena(1984) yields the following geothermometric expression for the common natural assemblages that can be represented essentially within the system FeO-MgO-CaO-MnO. Al₂O₃-SiO₂ T℃=(1971+11.91P(Kb)+1510(XCa+XMn)Gt)/(InKD+0.96)-273

목차

Abstract

SYMBOLS AND ABBREVIATIONS

INTRODUCTION

PREVIOUS WORK

EXPERIMENTAL METHODS

EXPERIMENTAL RESULTS AND THERMO-DYNAMIC ANALYSIS

DEVELOPMENT OF GARNET-ORTHOPYROXENE GEOTHERMOMETER

APPLICATION TO NATURAL SYSTEMS

REFERENCES

요약