CAJ | 학술논문

　　岩浆侵入作用可以引发水-岩反应和多种形式的变质作用和金属富集，当侵入至富含有机质的泥质围岩时，其热效应不仅会造成热接触变质、改变围岩的成岩作用，还会促进围岩中烃源岩的生烃作用。热传输模型研究是定量-半定量考察岩浆侵入体及其围岩热演化的重要工具之一。本文选取粤东典型的花岗岩-泥岩接触带剖面，在开展地质地球化学研究的基础上，进行了二维热传输模型分析。模拟结果与地质基本一致，发现岩浆侵入能够显著提高接触带围岩和上覆围岩的地温，其中侧向传输的范围有限，根据多个规模不等的花岗岩岩体热传输模型分析结果，发现小型侵入体的热影响范围与其侵入体规模正相关，但对于大型侵入体而言，其侧向影响范围一般在2.5 km左右。本文研究成果对认识与岩浆活动有关的成矿作用和油气成藏作用有着重要意义。
　　암장침입작용가이인발수-암반응화다충형식적변질작용화금속부집，당침입지부함유궤질적니질위암시，기열효응불부회조성열접촉변질、개변위암적성암작용，환회촉진위암중경원암적생경작용。열전수모형연구시정량-반정량고찰암장침입체급기위암열연화적중요공구지일。본문선취월동전형적화강암-니암접촉대부면，재개전지질지구화학연구적기출상，진행료이유열전수모형분석。모의결과여지질기본일치，발현암장침입능구현저제고접촉대위암화상복위암적지온，기중측향전수적범위유한，근거다개규모불등적화강암암체열전수모형분석결과，발현소형침입체적열영향범위여기침입체규모정상관，단대우대형침입체이언，기측향영향범위일반재2.5 km좌우。본문연구성과대인식여암장활동유관적성광작용화유기성장작용유착중요의의。
Magmatic intrusion can not only trigger massive water-rock interactions and various forms of metal enrichment, but may also lead to thermal contact metamorphism and affect the diagenesis of rocks. When invading into organic matter enriched mudstone, it can promote hydrocarbon generation of source rocks due to its thermal effects. The heat transfer model is one of the important tools for investigating magma intrusion and thermal evolution of its wall rocks. In this study, geological investigation and numerical simulation by employing a 2-D heat transfer model were performed for two typical granite-mudstone contacts in eastern Guangdong Province. The thermal evolution of wall rocks disclosed by numerical simulation is well consistent with the temperature identified by vitrinite reflectance and metamorphic minerals. The dimension of intrusion is found to be a key factor controlling the heat-affected area. Magma intrusion of tens of square kilometers may cause prominent heat effects in the area. The range of heat-affected area in lateral direction is about 2.5 km at most. Our findings are of important significance on magmatic activity related to metallogenesis and petroleum generation-accumulation.