First Finding of the Blinded Ancient Gold-Bearing Placer Layer Within Lower Cretaceous Strata from the
详细信息
- 责任者：Zhang Yongsheng (Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Song Tianrui
- 刊名：Journal of Jilin University
- 出版年：2010
- 卷期：40(6)
- 关键词：金矿 ; gold ores ; 黑龙江省 ; Heilongjiang Province
- 页码：p.1278-1286
- 图表：3 illus., 2 tables, 13 refs.
- 分类号：1001
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
A blinded ancient gold-bearing placer layer is firstly found at 679.19 m segment of the D7 drilling, in the Muling Formation in Jixi basin, eastern Heilongjiang Province. Heavy minerals in placer layer include native gold, authegenic monazite, clastic monazite, xenotime, zircon, galena, sphalerite, rutile, ilmenite, apatite, biotite, chlorite, pyrite, chalcopyrite, leucoxene, titanite, limonite, hematite, magnetite, Fe-Mn minerals, boehmite, uranium-oxide mineral, native copper and native copper-zinc metals etc. The authors suggest that the magnetic logging method be used to determine the distributing area of blinded ancient placer. Moreover, such minerals as authegenic monazite, framboid pyrite, and native copper-zinc metal in the ancient placer layer indicate that the layer was formed in a favorable sedimentary environment for biomineralization process.