地质学报2013，Vol.87Issue(3)：375-383,9.
内蒙古哈达特陶勒盖铅锌矿床成矿物理化学条件研究
Physical-Chemical Condition of Mineralization of the Hardat Tolgoi Pb-Zn Deposit, Inner Mongolia
摘要
Abstract
The Hardat Tolgoi Pb-Zn Deposit, located in the assembly belt of the North China Plate and the Siberia Plate, is a new medium-sized Pb-Zn deposit in the Erenhot-Dongwuqi polymetallic ore belt. Based on the field exploration, study of fluid inclusion, and H, O, S and Pb isotopic compositions, this paper discussed the fluid evolution and metallogenic mechanism of the ore deposit. Fluid inclusions study suggests that the mineralization homogenization temperature ranges from 195°C to 408°C with an average of 332. 5°C, the salinity from 1. 40% to 11. 93% NaCleq. with an average of 4. 87%NaCleq. , and the density 0. 61 g/cm3 to 0. 89 g/cm3 with an average of 0. 72 g/cm3. The histogram diagram shows two peak values, one ranging from 230°C to 250°C may be related with metallogenisis; the other from 350°C to 370°C may represent the early metallogenic fluid temperatrue. It was estimated that fluid formed under the pressure of about 13. 0 MPa and the depth of about 1. 3 km. Test results of the Laser Raman analyses indicate that the ore forming fluids belonged to the H2O-NaCl system with little CO2. The study of hydrogen and oxygen compositions indicates that the ore-forming fluid of the Hardat Tolgoi Pb-Zn deposit mainly derived from magmatic water mixed with meteoric water. S and Pb isotopic compositions of the ores are characterized by narrow change range and relatively homogeneity, with δ34 S of 4. 0‰ to 6. l‰; 206pb/204pb of 18-311 to 18.467, 207Pb/204Pb of 15.590 to 15.636, 203Pb/204Pb of 38.253 to 38.393. Both the S and Pb isotopic compositions of ore indicate that the metallogenic materal were derived from magma. All of this suggest that the Hardat Tolgoi Pb-Zn deposit is a shallow mesothermal deposit.关键词
流体包裹体/稳定同位素/成矿机制/哈达特陶勒盖/内蒙古阿巴嘎旗Key words
fluid inclusions/ isotope/ metallogenic mechanism/ Hardat Tolgoi/ Abaga Banner of Inner Mongolia引用本文复制引用
陈进全,徐兆文,陈兴高,陈伟,王浩,王少华..内蒙古哈达特陶勒盖铅锌矿床成矿物理化学条件研究[J].地质学报,2013,87(3):375-383,9.基金项目
本文为国家自然科学基金项目(编号 40973030)资助的成果. （编号 40973030）
