通过对冀北东坪地区的含矿似斑状花岗岩、“石英似斑晶”及其流体包裹体的研究，查明似斑状花岗岩金矿化与东坪石英脉型、蚀变岩型金矿化的关系。主要研究内容有：1）似斑状花岗岩的岩石学；2）石英“似斑晶”的成因；3）“似斑晶”石英中的流体包裹体；4）似斑状花岗岩的金矿化；5）“似斑晶”石英中的包裹体与金矿化关系。项目特点和主要创新点包括：1）查明含矿似斑状花岗岩的控岩地质条件，与碱性二长岩杂岩体、NEE-SWW向剪切带构造的成因联系；2）以似斑状花岗岩的“石英似斑晶”为切入点，研究各种特殊的岩石结构和复杂的流体包裹体种类，探索石英似斑晶成因，结合东坪金矿的成矿流体特征，为区域金矿化的流体演化及成矿作用研究提供依据；3）揭示似斑状花岗岩金矿化与东坪石英脉型、蚀变岩型金矿化的成因联系，阐明这种在碱性杂岩体内产出的、与构造-热液叠加改造相关的金矿化对东坪特大型金矿成因及区域找矿的理论意义。

The Dongping giant gold deposit，situated in northern Hebei Province, was firstly found among the alkaline complex in China. The gold deposits in this surrounding area are usually recognized as alkaline rock-related gold deposits because of host rocks. However，geochronology shows that these gold deposits were formed during Jurassic, while the alkaline complex was formed during Devonian. The gold mineralization may be gold-vein quartz and gold-bearing altered rock types, and is also controlled by the shear zones. Porphyry-like granite was newly found in recent years, and is significant for understanding the origin of gold deposits in this area.. The aim of this research is to reveal gold mineralization in porphyry-like granite and its relationship with gold-quartz vein and gold-bearing altered types in the Dongping deposit by studying porphyry-like granite, quartz phenocryst, and fluid inclusions. The main research contents which will be carried on includes three aspects: 1) petrology of porphyry-like granite; 2) the origin of quartz phenocryst; 3)fluid inclusions in quartz phenocryst; 4) gold mineralization in porphyry-like granite; and 5) the relationship between fluid inclusions in quartz phenocryst and gold mineralization. . The distinguishing features and new ideas of this proposal includes three aspects. Fistly, the geological controlling conditions of ore-bearing porphyry-like granite will be concerned, which include the genetic relations with alkali complex and NEE-SWW trending shear zones. Secondly, the research will focus on quartz phenocryst in porphyry-like granite, and a varity of rock textures and various fluid inclusion types will be studied, so that the origin of quartz phenocryst, ore-forming fluid evolution and gold mineralization associated with the Dongping gold deposit can be understood. And the last, that how the gold minealization in porphyry-like granite is related with gold-quartz vein and gold-bearing altered rock types is also concerned in the proposal, which is conducive to understanding the origin of the Dongping giant gold deposit and regional prospecting.