Sedlmentarp Sequence and Gold-Bearing Behaviour of the Mesozoic Coarse Clastic Member,Nortdeast Border of Jiaolal Basin
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摘要: 胶莱盆地属于晚中生代断陷盆地，东北缘广泛出露中生界的粗碎屑岩系。在对其进行详细的野外宏观描述、室内微观鉴定及样品含金量测试的基础上，研究了粗碎屑岩段的沉积物组成、沉积类型和微观特征，建立了该岩段在不同地区的垂向沉积层序及典型展序组合类型。不同的水动力条件是造成砾岩层内部结构复杂性变化的主要原因。通过与国内外有关资料的对比分析，指出研究区粗碎屑岩段形成于干旱、近源快速堆积的陆上冲积扇环境，且探讨了其含金性。Abstract: TheJiaolai basin is a Late Mesozoic fault basin anud has an extensive outcroping coerae elastic system is its narthasst border. Based.the minutefiled macroexamination indoor macroexamination and gold-conbeat test on the trsc an the casxx daatic naennbar a the utudy area,thedeposits and established thdr sedimentary eequenceb acrd types of ssome typical dspositional associations in the diffrrent.it was suggested that different dspositional hydrodynamic candition is the main reason causingthe complicated icated chasrge texture in a xonglomerate bed By comparing domestic and aborad information,thispaper poinred out that the clatatec rnembar forms in a dry. prcaumal quickly-accumulattedsubaerial slludiel fan environment ,and it also probed into the gold-bearing behaviour of this member.
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