A Numerical Simulation of the Heat Transfer in Granite Intrusion-Mudstone Contact Zone and Its Geological Implication: A Case Study from Eastern Guangdong Province, China
详细信息
- 责任者：Ma Yemu (State Key Laboratory for Mineral Deposits Research ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093 ; China) ; Lu Xiancai
- 刊名：Geological Journal of China Universities
- 出版年：2013
- 卷期：19(2)
- 关键词：侵入体 ; intrusions ; 油气藏形成 ; reservoir formation ; 广东 ; Guangdong
- 页码：p.307-315
- 图表：illus., 2 tables, 35 refs.
- 分类号：0801
- issnNo：ISSN1006-7493
- isbnNo：CN32-1440/P
摘要
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.
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