MILY: ’Times New Roman’; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang=EN-US>This paper mainly discusses the mud volcano disaster and its genetic mechanism in ml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />me w:st="on">Ramreeme> Island. Combined with the geological background of me w:st="on">Ramreeme> Island and the present situation of the mud volcano, grading analysis and micro-morphology analysis have been made by taking samples from three sampling sites of the northeast, the middle and the western part of me w:st="on">Ramreeme> Island. The finding is that the particle sizes of samples between 1mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ascii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-family: ’Times New Roman’">～mes New Roman’; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang=EN-US>100 μm show a unimodel normal distribution, with similar grain size mid-value, concentrated size distribution, poor sorting, and quite positive skewness in grading symmetry. The samples’ matrix are mainly argillaceous, containing a lot of argillaceous clasts, tiny crystal clasts and a few pores, and having a little strongly altered plagioclase phenocryst and pyroxene phenocryst, from which, the authors can judge that the sampling sites have the same provenance. Thus, it can be deduced that there is a uniform argillaceous layer as the unified provenance of the me w:st="on">Ramreeme> Island mud volcano.
