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1Cascaded Evolution of Mantle Plumes and Metallogenesis of Core- and Mantle-derived Elements显示文摘Mineral deposits are unevenly distributed in the Earth's crust, which is closely related to the formation andevolution of the Earth. In the early history of the Earth, controlled by the gravitational contraction and thermal expansion,lighter elements, such as radioactive, halogen-family, rare and rare earth elements and alkali metals. migrated upwards;whereas heavier elements, such as iron-family and platinum-family elements, base metals and noble metals, had atendency of sinking to the Earth's core, so that the elements iron, nickel, gold and silver are mainly concentrated in theEarth's core. However, during the formation of the stratified structure of the Earth, the existence of temperature, pressureand viscosity differences inside and outside the Earth resulted in vertical material movement manifested mainly bycascaded evolution of mantle plumes in the Earth. The stratifications and vertical movement of the Earth wereinterdependent and constituted the motive force of the mantle-core movement. The cascaded evolution of mantle plumesopens the passageways for the migration of deep-seated ore-forming material, and thus elements such as gold and silverconcentrated in the core and on the core-mantle boundary migrate as the gaseous state together with the hot material flowof mantle plumes against the gravitational force through the passageways to the lithosphere, then migrate as the mixed gas-liquid state to the near-surface level and finally are concentrated in favorable structural expansion zones, forming mineraldeposits. This is possibly the important metallogenic mechanism for gold, silver, lead, zinc, copper and other manyelements. Take for example the NE-plunging crown of the Fuping mantle-branch structure, the paper analyzes ductile-brittle shear zone-type gold fields (Weijiayu) at the core of the magmatic-metamorphic complex, principal detachment-type gold fields (Shangmingyu) and hanging-wall cover fissure-vein-type lead-zinc polymetallic ore fields (Lianbaling)and further briefly analyzes the source of ore-forming material and constructs an ore-forming and -controlling model.NIUShuyin HOUQuanli HOUZengqian SUNAiqu WANGBaode LIHongyang XUChuanshi 2003Acta Geologica Sinica(English Edition)2003,77,4:18
2地幔热柱多级演化及其成矿控矿研究:以张-宣幔枝构造研究为例显示文摘张-宣地区是河北省金银多金属矿床集中区,可划分出以宣化—崇礼—赤城一带岩浆-变质杂岩区为中心的金矿集中区和外围盖层区的银多金属矿分布区。近年研究表明,金银多金属成矿物质主要来自地球深部,通过地幔热柱多级演化向上迁移,并在幔枝构造的有利构造扩容带中集聚成矿。分别以幔枝构造核部的东坪金矿、拆离带的黄土梁金矿和外围断陷盆地中的万全寺银金矿为例,通过其成矿作用的解剖、分析、归纳认为,在张-宣幔枝构造展布区,平面上从核部向外围,垂向上由下部往上部,均具有金→银→铅锌矿的分带性,并已经在多处矿山得到采矿工程或钻探工程的证实,这对于深部找矿具有重要指导意义。同时据此分析表明,张-宣幔枝构造区深部仍具有很大的找矿潜力,这种成矿作用分析也可以推广到成矿地质条件相近的幔枝构造区。牛树银 孙爱群 郝梓国 王宝德 马宝军 张建珍 魏明辉 2011地学前缘2011,18,2:8
3Zircon U-Pb age and Hf isotopic characteristics of the Huangtuliang monzonitic granite, North Hebei Province, China显示文摘The Huangtuliang monzonitic granite outcrops on the northern side of the Huangtuliang gold mining district, Chicheng, North Hebei Province. Our predecessors only made isotopic age determination using the K-Ar method. Through LA-MC-ICP-MS zircon U-Pb dating and zircon Hf isotopic composition determination, this study acquired the age of 244.8±2.0 Ma(MSWD=0.57) on the basis of the weighed mean 206Pb/238U ratio, indicating that the Huangtuliang monzonitic granite was formed during the Middle Triassic period, which is the product of Early Indosinian magmatic activities in the region of North Hebei. εHf(t) values vary relatively evenly, within the range of-10.65--14.03, with an average of-12.14. The two-stage evolution model ages, tDM2, vary between 1943 and 2144 Ma, implying that the rock-forming materials of the Huangtiliang monzonitic granite mainly came from the Paleoproterozoic recirculated crustal materials, though a small quantity of enriched-mantle materials would have been involved.HU Huabin NIU Shuyin ZHANG Zhanyang TIAN Ye LIU Xiaoyu CHEN Xicai CHEN Haijiao 2014Chinese Journal Of Geochemistry2014,33,1:1
4张家口万全寺银矿的成矿作用与深部找矿显示文摘万全寺银矿是张宣幔枝构造东缘盖层中的一个中型银矿床,现主要开采Ⅴ号、Ⅱ号矿脉。本文以幔枝构造理论为指导,通过对矿床地质背景、矿田构造特征、成矿物质来源、矿脉规模垂向变化、矿床成因等方面的研究,笔者认为万全寺银矿深部仍有很大的找矿潜力。另外,往深部金品位明显增高,具有从浅部银矿往深部逐渐变为银金矿、甚至金银矿的趋势。深部地质找矿应该引起高度重视。王晓枝 牛树银 刘亚明 孙爱群 王宝德 郭鹏志 郑美 王金龙 2010地质调查与研究2010,33,1:1
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