塔里木盆地奥陶系碳酸盐岩热液蚀变类型及蚀变流体的分带特征

已探明塔里木盆地下古生界碳酸盐岩地层储量巨大。对塔里木盆地西北部柯坪-巴楚-阿图什一带的4块区域开展了系统的野外和重点观测工作，包括蓬莱坝剖面、柯坪水泥厂剖面、托普郎剖面等。本研究通过考察塔里木盆地奥陶系碳酸盐岩热液溶蚀及相关现象。从野外产状、伴生关系以及矿物岩石学特征角度解剖奥陶系地层中热液矿物组合的地质特征。研究表明，该区域存在富镁流体、富氟流体和富硫流体3种流体，分别来源于封存卤水、火成活动和TSR热液。不同性质流体蚀变具有相似的分带性。

The hydrothermal alteration types and zoning features of Ordovician carbonate in Tarim Basin.

The huge explored reserve from the carbonate layer of lower paleozic Tarim Basin has turned the area into one of the most important exploration and development sites. In this study, we conducted a comprehensive field study in the Kalpin belt, northwestern Tarim basin, with emphasis on four areas: Penglaibei profile, Kalpin cement plant profile,Toplung profile. We mainly paid attention to the hydrothermal corrosion and the alteration during the growth of Ordovician carbonate rock. The hydrothermal products were observed, described and sampled for further analysis. The geological characteristics of those products are revealed by the field output form, associated manner and mineralogy. Three types of fluids that exist in the study area, namely Mg-riched fluid, F-riched fluid and S-riched fluid, originates from sealed brine, igneous activities and TSR hydrothermal fluids, respectively. Although fluid type varied, the alteration of those fluids share a similar belt-shape distribution.