Abstract:

According to the formation and evolution of granitegreenstone terrain of Taihua Group in the Xiaoqinling district,based on the characteristics of compositions of major elements, trace elements and rareearth elements, gold evolution, metallogenic geochemistry and physical chemistry in the Xiaoqinling gold deposits are discussed. We think that Taihua Group is one of the gold sources of deposit formation, and the Wenyu granite body of Yanshan stage, in a close relation to the gold deposits in Xiaoqinling district, is formed by remelting of Taihua Group and its below crust mantle substance. The Wenyu granite body controls the gold abnormity and distribution of gold deposits, but it only offers thermal power and offers no gold oreforming substance. The Xiaoqinling deposits belong to hydrotherm type; the metallogenic hydrotherm is mainly magmatic water, which mixed some meteoric water to form the deposits. The metallogenic hydrotherm belongs to weak acidalkalescent,and  metallogenic temperature is moderately high.

Key words: font-family: "Times New Roman", mso-bidi-font-size: 12.0pt, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体">material source, mineralization, metallogenic hydrotherm, Xiaoqinling gold deposit