南黄海中部隆起火成岩体识别及其分布预测

中部隆起是南黄海盆地的重要组成部分,研究与勘探程度低。根据南黄海中部隆起及其周边火成岩岩石物理性质,以二维地震资料为主,结合区域磁力资料,并根据火成岩在地震剖面上的反射特征,认为研究区主要存在平行板状地震反射特征、穿层板状地震反射特征、丘状地震反射特征、蘑菇状地震反射特征及火山机构地震反射特征等5种火成岩地震反射特征。在此基础上对南黄海中部隆起火成岩体的分布进行了预测,最终认为中部隆起火成岩体较发育,其分布与区域深大断裂有着密切关系,主要分布在中部隆起的中部及西部地区。

Identification and Forecast on the Distribution of Igneous Bodies in the Central Uplift of South Yellow Sea Basin

The Central Uplift, which is very low in exploration degree, is an important part of South Yellow Sea Basin. On the basis of the physical properties of igneous rocks in the central uplift of the Southern Yellow Sea and its surrounding areas, combining with comprehensive analysis of 2D seismic data and the regional magnetic data, five types of typical igneous features were identified in seismic reflection profiles of this area, including parallel slaty seismic reflection, cross slaty seismic reflection, moundy seismic re- flection, mushroom seismic reflection and volcanic edifices seismic reflection. According to the recognition of igneous rocks, the forecast on the distribution of igneous bodies in this area has been conducted. The results showed that igneous bodies are well devel- oped in the Central Uplift, and their distributions are closely related to the regional large faults, distributing mainly in the central and west oart of the Central Uolift.