II. BRIEFLY ANSWER FOLLOWING THE QUESTIONS. (3 questions, 10 marks per question, total 30 marks) (answering questions in Chinese is allowed 1. How many concentration processes that lead to the formation of ore deposits are there in our study? 3. What are skarn deposit formation condition 2. What roles did the ore-bearing fluids play in formation of ore deposits? I. EXPLANATION THE MODEL FIGURES WITH GEOLOGICAL CHARATERS OF ORE DEPOSITS ( Choicing to answer 2 questions from 3 questions, 10 marks per question, total 20 marks) (answering questions in Chinese is allowed 1. To describe the main charaters of the ore deposit according to the ollowing figures. d■234〖5圈 8E9[10 1-砂砾岩:2-粉砂岩和泥灰岩:3-大理岩:4-中-酸性脉岩:5-闪长岩(和/或石英闪 长岩、花岗岩):6-接触交代矿体:7-蚀变带;8-沉积-接触变质改造矿体:9-断层: 10-矿体产状类型编号Ⅲ. BRIEFLY ANSWER FOLLOWING THE QUESTIONS. ( 3 questions , 10 marks per question, total 30 marks) （answering questions in Chinese is allowed） 1. How many concentration processes that lead to the formation of ore deposits are there in our study? 2. What roles did the ore-bearing fluids play in formation of ore deposits? 3. What are skarn deposit formation conditions? Ⅳ. EXPLANATION THE MODEL FIGURES WITH GEOLOGICAL CHARATERS OF ORE DEPOSITS (Choicing to answer 2 questions from 3 questions , 10 marks per question, total 20 marks) （answering questions in Chinese is allowed） 1. To describe the main charaters of the ore deposit according to the following figures. 4a 2a 2b 4b 3b 1b 1a 3a 4a 地表 成矿近 似深度 (km) 4 3 2 1 1a 1 2 8 9 3 10 4 5 6 7 1-砂砾岩；2-粉砂岩和泥灰岩；3-大理岩；4-中-酸性脉岩；5-闪长岩（和/或石英闪 长岩、花岗岩）；6-接触交代矿体；7-蚀变带；8-沉积-接触变质改造矿体；9-断层； 10-矿体产状类型编号