A Preliminary Research on Skarns of Magmatic Origin

作     者：Wu Yanchang Anhui Institute of Geological Sciences, Hefei 230001 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：1999年第18卷第1期

页      面：58-61页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 

主　　题：magmatic skarn magmatic skarn alkali intrusive pair the middle and lower reaches of Changjiang River. 

摘      要：Skarns of magmatic origin, or magmatic skarns as called, are formed by crystallization of skarnic magma injecting into structural fissures. They occur in various rocks (rock formations), mainly in form of veins. Usually, they possess massive structure and cumulative texture. They mainly consist of calc silicate, without or with minor water bearing silicates. The typical minerals in it include alkali feldspar, calcite and anhydrite. Some silicate melt inclusions and high temperature, high salinity poly phase inclusions can be seen in the crystals of their host minerals. The particular members of the magmatic skarns are transitional skarn and skarnic pegmatite. The magmatic skarn and the congenetic alkali rich diorite usually collaborate in a conjugating and complementary manner. They probably are the products of calcic contamination, degassing, desilicification and separation in melt state of deep seated (high level magma chamber) alkali rich intermediate acid magma.