pt; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" class=MsoNormal>pt; mso-bidi-font-family: 宋体; mso-font-kerning: 18.0pt" lang=EN-US>Sedimentary and Geochemical Characteristics of Crystal Fan in the “Calcari a Lucina” Cold Seep Carbonate of Miocene in the Northern ity w:st="on">Apenninesity>, Italy

• 责任者：Huang Huagu (Key Laboratory of Marginal Sea Geology ; Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Di Pengfei
• 刊名：Geoscience
• 出版年：2010
• 卷期：24(3)
• 关键词：碳酸盐岩 ; carbonate rocks ; 意大利 ; Italy
• 页码：p.545-551
• 图表：4 illus., 2 tables, 47 refs.
• 分类号：0803
• issnNo：ISSN1000-8527
• isbnNo：CN11-2035/P

pt" class=MsoNormal>ity w:st="on">pt" lang=EN-US>Crystality>pt" lang=EN-US> fan is a marked structure of cold seep carbonates, which consists of radial mineral aggregations, e.g., aragonite, barite.Numerous cold seep carbonates developed in the Miocene strata of the northern Apennines in Italy, and there were typical crystal fans in the “Calcari a Lucina” seep carbonate. These crystal fans consist of radial aragonite aggregations with minor calcite and clearly growth lamina. The content of rare earth elements (REE) of crystal fan carbonate is very low(0.23×10^-6), and shale-normalized REE patterns show significantly negative Ce anomaly, indicating that crystal fans were deposited in oxidation environment.