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您的检索式：作者名="David I.Norman"
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| 1 | N_2-Ar-He systematics and source of ore-forming fluid in Changkeng Au-Ag deposit, central Guangdong, China显示文摘Changkeng Au-Ag deposit is a newly-discovered new type precious metal deposit. N2-Ar-He systematics studies and 3He/4He and δD-δ18O composition analyses show that the ore-forming fluid of the deposit is composed mainly of formation water (sedimentary brine) but not of meteoric water, which was thought to be source of the ore-forming fluid by most previous researchers. The content of mantle-derived magmatic water in the ore-forming fluid is quite low, usually lower than 10%. According to the source of the ore-forming fluid, the Changkeng Au-Ag deposit should belong to sedimentary brine transformed deposits. From the Late Jurassic to the Early Cretaceous Period, with deposition and accumulation of thick sediments in Sanzhou Basin, the formation water in the sedimentary layers was expelled from the basin because of overburden pressure and increasing temperature. The expelled fluid moved laterally along sedimentary layers to the margin of the basin, and finally moved upward along a gently-dipping | 孙晓明 孙凯 陈炳辉 陈敬德 David I.Norman | 1999 | Science China Earth Sciences1999，42，5： | 12 |
| 2 | 广东长坑大型金银矿矿石矿物流体包裹体中有机气体组成及其对矿床成因的制约显示文摘新发现的长坑金银矿床是一个新型沉积岩赋矿型贵金属矿床。大部分研究者认为其成因为大气降水对流。超高真空四极气相质谱系统分析显示该矿矿石矿物流体包裹体中存在9种轻烃有机气体,它们主要由C_(1-4)饱和烷烃和C_(2-4)不饱和烯烃和芳烃组成,但烷烃占绝对优势,而烯烃和芳烃含量很低,大部分样品∑alka/∑alke>100。 | 孙晓明 David I.Norman 孙凯 陈炳辉 陈敬德 | 2003 | 地质学报2003，77，1： | 0 |
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