地质与勘探2012，Vol.48Issue(5)：991-999,9.
黑龙江省东宁县金厂金矿石英和闪锌矿激光40Ar-39Ar法年龄及其找矿意义
Automatic Laser Probe 40Ar/39Ar Isochron Ages of the Quatrz and Sphalerite from the Jinchang Gold Deposit, Dongning County, Heilongjiang Province, and their Prospecting Implications
摘要
Abstract
The Jinchang gold deposit in Dongning County of Heilongjiang Province is a typical super-large gold deposit in the epithermal-porphyry mineralization system of the Pacific marginal metallogenic mega-province. The mineralized rock bodies can be classified into four types：breccia type,ring -radial fault-controled vein type, layered-like micro-vein and disseminated type, and fractured alteration type. To determine the metallogenic age, we measured the age of the quartz of polymetallic sulfide-quartz in No. XH fracture altered ore body, and the sphalerite in No. J-9 explosive breccia pipe ore body by the high-precision single-grain Ar-Ar laser probe method. The results show that the 40Ar/39Ar isochron age for the quartz from the No. XH ore body is （119±5 ） Ma （MSWD = 6.3 ） , and the 40 At/a9 Ar isoehron age of the sphalerite from the No. J-9 ore body is （129±0.8） Ma （MSWD = 3.7 ）. Combining with the latest available detailed chronology of the related geological bodies, we confirm that the metallogenie age of the Jinchang gold deoposit is in the late Yanshanian, and its mineralization has a close relationship with the contemporary diorite-granodiorite porphyries. The diagenetic and metallo- genic environment of the Jinchang gold deposit provides a favorable condition to search for gold-rich porphyry type copper deposits, where the intrusive rocks associated with mineralization exhibit the shape of dikes and branches, indicative of a low erosion degree, implying a great possibility to discover deep -seated porphyry type Au（Cu） mineralization.关键词
激光40Ar-39Ar年龄/石英/闪锌矿/找矿/金厂金矿/黑龙江省东宁县Key words
automatic laser probe 40 Ar-39 Ar age/quartz/sphalerite/prospecting/Jinchang Gold Deposit/Dongning County of Heilongjiang Province分类
天文与地球科学引用本文复制引用
卿敏,唐明国,肖力,赵玉锁,韩先菊..黑龙江省东宁县金厂金矿石英和闪锌矿激光40Ar-39Ar法年龄及其找矿意义[J].地质与勘探,2012,48(5):991-999,9.基金项目
全国危机矿山典型矿床及成矿规律总结研究项目“晋东北-内蒙古中部地区火山岩型金多金属矿床成矿规律总结研究（项目编号20089925）资助. （）
