Estimation of the Source Time Function Based on Blind Deconvolution with Gaussian Mixtures     

Boi-Yee?Liao  Huey-Chu?HuangEmail author 《Pure and Applied Geophysics》2005,162(3):479-494

It is demonstrated that the blind deconvolution method is fully capable of recovering the unknown Greens function and of estimating the source time functions from observed seismic data of small earthquakes. Based on the assumption of the Gaussian-mixture model of the Greens function, the newly-formulated algorithm is evaluated using synthetic seismic data along with those of the May 8, 1996 Mexico earthquake (M_c = 4.6). Since the estimated results closely match the theoretical input very well, the method is then employed to analyze the source time functions of the July 7, 1995 Pu-Li, Taiwan earthquake (M_L = 5.3). The stations triggered by this event were azimuthally well covered. Using the estimated source time functions, information pertaining to the directivity effect is readily obtained, and the actual fault plane of this event is identified, thus clearly indicating that this method provides a most efficient way to estimate the source time function of a small earthquake.Acknowledgment The authors would like to express their thanks to two anonymous reviewers for their valuable suggestions and Dr. I. Santamarias courteous assistance. They also appreciate the efforts of Drs. H.C. Chiu and R.J. Rau, who provided the seismic data and the fault plane solutions. The National Science Council, Taiwan, has supported this research (NSC 91-2119-M-194-011).  相似文献   

金川Ⅰ矿区6#富铜盲矿体成因探讨     

孟蓉  田毓龙 《云南地质》2006,25(3):374-380

金川硫化铜镍矿床Ⅰ矿区6#富铜矿属于岩浆深熔-晚期贯入矿体，于正常的超基性岩型富矿体之后，富含贵金属元素和铜镍的富矿岩浆沿北东东向张性断裂上侵形成，呈透镜状产出。  相似文献   

贵州省泥堡金矿床矿体类型及其形成机理的新认识   总被引：1，自引：0，他引：1       下载免费PDF全文

祁连素  何彦南  祁杰  杨天长  张明民  郑媛  张丞 《贵州地质》2014,31(2):109-115

根据贵州省西南部泥堡金矿床深部勘探成果,开展其矿床的矿体类型及其形成机理的综合研究,取得新认识如下:(1)矿区的主矿体不是层控型,而是断控型。断控型矿体的单个矿体规模大,厚度、品位较稳定,而层控型金矿的单个矿体规模小,厚度及矿石品位变化大;(2)虽然矿床的形成受到多种因素控制,但构造、地层及其有利岩性是关键的控制因素,尤其是断裂构造因素。F1逆冲断层既是导矿构造又是容矿构造,本矿床最大的金矿体就赋存于F1断裂破碎带中的减压扩容带,即断层破碎带变宽及断层面变缓部位。这两点新认识对区域找矿具有一定指导意义。  相似文献   

山东牟平辽上金矿床地质特征     

罗忠明 《山东国土资源》2000,(3)

山东省烟台市牟平区辽上金矿床位于郭城断裂带东侧 ,赋存于荆山群野头组大理岩与震旦期花岗岩之接触带附近 ,矿体受NE向次级构造裂隙控制 ,呈盲矿体产出。  相似文献