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Indexed by:会议论文

Date of Publication:2011-09-16

Included Journals:EI、CPCI-S、Scopus

Volume:383-390

Page Number:3739-3743

Key Words:Heat Flow Model; Water Saturation; Thermal Parameters; Igneous Intrusion; Thermal Evolution

Abstract:This study presents a numerical investigation of the effect of decrease in water saturation of host rocks with dehydration reactions on the reconstruction of the thermal evolution of igneous-intrusions-bearing basins based on complex heat conduction models. The Bena 3 dike of Gippsland Basin (Australia) is selected as an example in this study. Results indicate: (1) the consideration of decrease in water saturation of host rocks (sandstone) with dehydration reactions in the models can obviously increase the predicted peak temperature T-peak of host rocks. The corresponding maximum deviation of T-peak occurs at the contact and reaches similar to 270 degrees C; (2) if water saturation of host rocks vary with dehydration reactions, the T-peak can also be influenced by the quartz content of host rocks. The predicted T-peak is higher for the host rocks with low quartz content. The maximum deviation of T-peak caused by the quartz content can attain 115 degrees C. However, the deviation of T-peak above 20 degrees C only occurs in a narrow region which is near the intrusion. Out of this region, the quartz content of sandstone has only a slight effect on T-peak.