检索结果-南通市图书馆

Geochemistry, Monazite U–Pb Dating, and Li–Nd Isotopes of the Madi Rare Metal Granite in the Northeastern Part of the North China Craton

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2019年第4期93卷 901-911页

作者： HOU Jianglong JIANG Biao dai hongzhang MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China

The Madi rare metal granite is a complex massif,which contains a variety of rare metals,such as Nb,Ta,Li,and *** this paper,the geochemical characteristics of the granite were obtained by multi-collector inductively coupled mass spectrometry(MC-ICP-MS).The precise crystalline age of the granite was obtained from monazite U-Pb dating,and the source of the granite was determined using Li-Nd *** Madi rare metal granite is a high-K(calc-alkaline),peraluminous,S-type *** U-Pb monazite age indicates that the crystalline age of the granite is 175.6 Ma,which is Early *** granite is characterized by a relatively wide range ofδ7 Li values(+2.99‰to+5.83‰)and high lithium concentrations(181 ppm to 1022 ppm).The lithium isotopic composition of the granite does not significantly correlate with the degree of magmatic *** insignificant amount of lithium isotope fractionation occurred during the granitic *** lithium isotopic composition of the granite significantly differs from that of the wall rock,but it is very similar to that of a primitive mantle peridotite xenolith(meanδ7 Li value+3.5‰).The plot of Li concentration versusδ7 Li indicates that the Li isotopic composition of the granite is similar to that of island arc *** on the above-described evidence,the granite was mainly derived from the crust,but it was contaminated by a deep granitic magma.

关键词： geochemistry U-Pb monazite age Li-Nd isotopes crystallization age magmatic source Madi rare metal granite

在线全文

学校读者我要写书评

暂无评论

四川阿坝可尔因锂矿田成矿规律与成矿预测

岩石学报 2024年第9期40卷 2819-2840页

作者：李鑫代鸿章王登红刘善宝范小东梁志高原文佳豪朱海洋中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室北京100037 中国地质大学(北京)地球科学与资源学院北京100083 包头市北斗地质勘查有限责任公司包头014010 内蒙古大中矿业股份有限公司巴彦卓尔015000 成都理工大学地球与行星科学学院成都610059 四川省第九地质大队德阳618000

青藏高原东北缘的松潘-甘孜造山带是我国最重要的锂矿成矿带,其中部地区的可尔因锂铍稀有金属矿田是最重要的伟晶岩型锂矿资源基地之一。本文在已开展的地质矿产调查及勘查工作的基础上,系统总结了矿田内典型矿床地质特征、矿床地球化... 详细信息

青藏高原东北缘的松潘-甘孜造山带是我国最重要的锂矿成矿带,其中部地区的可尔因锂铍稀有金属矿田是最重要的伟晶岩型锂矿资源基地之一。本文在已开展的地质矿产调查及勘查工作的基础上,系统总结了矿田内典型矿床地质特征、矿床地球化学特征、成岩成矿时代,完善了可尔因锂矿田成矿模型,并进一步指出了区域找矿方向,对提升区域伟晶岩型锂矿成矿规律及指导深部找矿意义重大。矿田内矿床类型均为花岗伟晶岩型稀有金属矿床,矿石矿物主要为锂辉石。花岗岩-伟晶岩与西康群变沉积岩具有近一致的Sr-Nd-Hf同位素组成,指示成岩成矿物质来源于西康群。自花岗岩至伟晶岩,原生矿物和全岩δ^(7)Li值均升高,指示伟晶岩形成于花岗岩浆分异;自钠长石伟晶岩至钠长石锂辉石伟晶岩,原生矿物δ^(7)Li值升高,而全岩δ^(7)Li值降低,指示伟晶岩浆演化过程中的分离结晶和出熔流体富集。可尔因复式岩体与伟晶岩具有相重叠的同位素年龄,为同期造山作用的产物,形成于印支造山晚期构造体制由挤压转为伸展的造山阶段。基于以上特征,对前人提出的可尔因矿田成岩成矿模式进行了完善,认为富锂的源区、适宜的构造背景、充分且强烈的岩浆结晶分异协同富水流体的富集共同促进了可尔因锂矿田的形成。此外,总结了可尔因锂矿田的找矿标志,并预测了找矿方向。

关键词：松潘-甘孜造山带可尔因锂矿田伟晶岩成矿规律成矿预测

Geochronology and Geochemistry of Li(Be)-Bearing Granitic Pegmatites from the Jiajika Superlarge Li-Polymetallic Deposit in Western Sichuan, China

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2019年第4期30卷 707-727页

作者： hongzhang dai Denghong Wang Lijun Liu Yang Yu Jingjing dai MNR Key Laboratory of Metallogeny and Mineral Assessment^ Institute of Mineral Resources CAGSBeijing 100037China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China

Strategic emerging minerals such as lithium,beryllium,niobium and tantalum are the most important rare metals currently,especially with the increasing demand of emerging industries on rare metals in *** Jiajika deposit with a complete Li-Be-Nb-Ta metallogenic series is the largest pegmatite type rare metal deposit in China at *** this paper,systematic researches of geochronology and petrogeochemistry were carried out to understand the genetic relationships between mineralization and magma evolution in the Jiajika deposit,which might be helpful to further rare-element prospecting in Songpan-Garze *** LA-ICP-MS U-Pb dating yields a concordia age of 217±1.1 Ma and a weighted mean 206 Pb/238 U age of 217±0.84 Ma for the aplite from the No.308 *** LA-MC-ICPMS dating yields concordant ages of 211±4.6 Ma for the No.308 pegmatite vein and198±4.4 Ma for the No.133 pegmatite vein,indicating that the rare metal mineralization mainly occurred in the Late Indosinian Period,further suggesting that the granites,aplites and pegmatites in Jiajika formed during a relatively stable stage after the intense orogeny of the Indosinian *** rare metal-bearing granitic rocks and pegmatites show a clear linear relationship between A/CNK and A/NK and are enriched in total alkalis and depleted in CaO,FeO,MnO,MgO,Ba and *** barren rocks and mineralized rocks feature similar rare earth element and trace element geochemical ***,these characteristics indicate that the aplites and pegmatites represent the highly differentiated products of the two-mica granite(MaG)in this area,which is the most likely parent *** the evolution of magma,strong alkali metasomatism occurred between the melt phase and the volatile-rich fluid phase;as a result,large-scale rare metal mineralization occurred in certain structural zones of the pegmatite veins in the Jiajika deposit.

关键词： granitic pegmmatites rare mmetals metallogenic epoch geochemical characterizatiion Jia ajika

Re-Os Isotopic Dating of a W-Be Polymetallic Deposit in the Southern Qinling Region, China

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2018年第1期92卷 414-415页

作者： dai hongzhang WANG Denghong WANG Chenghui HUANG Fan Key Laboratory of Metallogeny and Mineral Resource Assessment Ministry of Land and ResourcesInstitute of Mineral Resource Chinese Academy of Geological Sciences

Objective In recent years, a series of tungsten prospecting breakthroughs have been made in the southern Qinling Mountains. Especially, a new deposit type with a scheelite -beryl-molybdenite assemblage in the Zhen＇an area of Shaanxi Province was firstly discovered. This deposit is currently in a detailed investigation stage, and no detailed study has been yet conducted. This work selected one molybdenite sample from the Be （W） ores in this deposit for Re-Os isotope measurements to define the time limit of tungsten and beryllium mineralization, and to further reveal the ore-forming geological setting of rare metals in the southern Qinling region.

关键词： Re-Os Isotopic Dating Re-Os Isotopic Dating of a W-Be Polymetallic Deposit the Southern Qinling Region

New Discovery of Selenides in the Shiti Barite Deposit, Dabashan Region and its Geological Significances

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2020年第2期94卷 558-560页

作者： LIU Jiajun dai hongzhang ZHAI Degao Emmanuel JMCARRANZA YUAN Feng State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBeijing 100083China MNR Key Laboratory of Metallogeny and Mineral Resource Assessment Institute of Mineral ResourcesCAGSBeijing 100037China Geological Sciences School of AgriculturalEarth and Environmental SciencesUniversity of KwaZulu NatalDurban 4000Republic of South Africa

The large-scale Shiti barite deposit of Shaanxi,being stratiform or stratoid in form,occurs in an early Paleozoic large witherite-barite metallogenic belt of southern Qinling region(China).The ore deposit,hosted in Lower Silurian Daguiping Formation,is composed of a series of carbonaceous chert,carbonaceous slate and carbonaceous sandstone,and is characterized by persistent syn-sedimentary ore ***,w *** and barite-witherite constitute the major ore minerals,with barite being the main one.

关键词： sandstone deposit Silurian

中国锂矿的多旋回深循环内外生一体化成矿理论及其找矿应用

在线全文

学校读者我要写书评

暂无评论

地质学报 2024年第3期98卷 889-897页

作者：王登红代鸿章刘善宝王成辉李建康李鹏陈郑辉于扬秦锦华孙艳娄德波姚佛军中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室北京100037

中国锂资源的分布具有卤水型与硬岩型相伴相随、若即若离的特点。“多旋回深循环内外生一体化”成锂理论,在多年三稀金属矿产找矿实践和理论研究的基础上不断丰富完善。中国锂矿的形成与“多旋回”构造运动密切相关,从前寒武纪到新生代... 详细信息

中国锂资源的分布具有卤水型与硬岩型相伴相随、若即若离的特点。“多旋回深循环内外生一体化”成锂理论,在多年三稀金属矿产找矿实践和理论研究的基础上不断丰富完善。中国锂矿的形成与“多旋回”构造运动密切相关,从前寒武纪到新生代均有成矿潜力,可构成一个完整的多旋回成矿谱系。锂的“深循环”,一是锂深度参与成岩成矿的物质循环;二是需要一个“圈闭”的构造背景将锂“捕获”以避免其过度分散,锂从开始加入到岩浆与最终定位的深度之差,是硬岩型锂矿成矿的关键之一,压差越大越有利于伟晶岩型锂矿的形成。大量锂矿实例显示锂的物质循环是“内外生一体化”的统一过程,高海拔地区(山上)的含锂地质体(花岗岩类甚至直接就是含锂矿床)经风化剥蚀之后,可能成为沉积型锂矿的物质来源之一;而富含锂的沉积岩经过埋藏、变质、深熔也可以形成含锂的岩浆岩、伟晶岩。我国西部塔里木盆地、四川盆地、扎布耶盆地及东部的江汉盆地、吉泰盆地、周田盆地等大小不一的盆地均含锂,而其周边造山带中也不同程度发育硬岩型锂矿,这就为区域找矿指明了方向。“多旋回深循环内外生一体化”成锂理论是三稀矿产成矿理论的重要组成部分,为我国锂矿找矿工作提供了指导和借鉴,在甲基卡、可尔因、阿尔金、幕阜山等锂矿矿集区的找矿实践中发挥了积极作用。

关键词：锂矿构造运动 “多旋回深循环内外生一体化”成矿理论找矿应用

中国不同时代典型花岗伟晶岩型锂矿特征及其对找矿预测的启示

在线全文

学校读者我要写书评

暂无评论

中国地质 2024年第1期51卷 17-41页

作者：赵如意王登红凤永刚王成辉梁婷李凯旋代鸿章石煜高景刚东华理工大学核资源与环境国家重点实验室江西南昌330013 中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室北京100037 长安大学地球科学与资源学院陕西西安710054

【研究目的】花岗伟晶岩型锂矿是当今世界金属锂供给的主要矿床类型之一,为明确花岗伟晶岩型锂矿的共性,本文针对性地制定找矿预测工作方案,圈定优质找矿靶区。【研究方法】本文对中国花岗伟晶岩型锂矿的时空分布、构造背景、矿床地质... 详细信息

【研究目的】花岗伟晶岩型锂矿是当今世界金属锂供给的主要矿床类型之一,为明确花岗伟晶岩型锂矿的共性,本文针对性地制定找矿预测工作方案,圈定优质找矿靶区。【研究方法】本文对中国花岗伟晶岩型锂矿的时空分布、构造背景、矿床地质、矿体特征、成矿规律和控矿因素等进行了系统对比,并对产锂花岗岩的特征进行归纳、总结。【研究结果】认为中国已发现的花岗伟晶岩型(锂辉石)锂矿主要分布于西部,东部以花岗岩型(锂云母)锂矿占优。古生代以来的后碰撞环境是中国现有伟晶岩型锂矿的主要产出背景,成矿时代可以延续到非造山构造环境,成矿元素组合绝大多数具有LCT型伟晶岩的特征,矿床数量和资源量都以印支晚期最多。产锂花岗岩一般是同期多阶段复式岩体,其演化分异程度较高。与花岗伟晶岩型锂矿关系最为密切的花岗岩颜色较浅、富含K、Na、P、F、Rb、U、Th,高氧逸度,高Rb/Sr、低Nb/Ta和Zr/Hf,其规模较大,结构构造稳定,更利于综合研究和遥感识别。【结论】在“全位成矿,缺位找矿”理念指导下,从寻找目标更大的产锂花岗岩入手,“先找矿、后优化、再填图”,有望在二级构造单元从挤压向伸展转换的“界山”花岗岩,尤其是侵入边界呈波浪状、舌状产出的外接触带,取得找矿突破。

关键词：花岗伟晶岩锂矿成矿时代产锂花岗岩找矿预测 "界山找矿" 矿产勘查工程

Newly Discovered Euxenite and Polycrase in the Jiada Pegmatite-Type Lithium Deposit,Ke'eryin Lithium Ore Field,and its Geological Significance

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2021年第5期95卷 1782-1783页

作者： dai hongzhang WANG Denghong LIU Shanbao WANG Chenghui MA Shengchao DING Xiaoping ZHU Haiyang MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Minmetals Exploration and Development Co. LTD.Beijing 100010China Brigade of Sichuan Nuclear Industry Geological Bureau DeyangSichuan 618000China

Objective The Ke’eryin lithium ore field is one of the most typical concentrated distribution areas for lithium(Li)polymetallic pegmatite veins in the Songpan–Garzêmetallogenic belt,western Sichuan(Li et al.,2015).A series of Li deposits are around the Ke’eryin complex rock mass(Fig.1),represented by Dangba,Lijiagou and Yelonggou,*** granitic intrusions and pegmatite veins intruded into the Triassic epimetamorphic rock series.

关键词： rock Triassic belt

The Characteristics of Sulfur and Lead Isotope Geochemistry of Laozhaiwan Gold Deposit,Yunnan Province

在线全文

学校读者我要写书评

暂无评论

地球科学进展 2012年第S1期27卷 310-311页

作者： Zhao Dekun Chen Cuihua Gu Xuexiang dai hongzhang He Chaoxin College of Earth Sciences Chengdu University of Technology School of Earth Sciences & Resources China University of Geosciences

1 Introduction Laozhaiwan gold deposit,a part of"Golden Triangle"in Yunnan-Guizhou-Guangxi,was located in Jiumo village in Guangnan county,Yunnan *** main ore-bearing stratum of the deposit was Posongchong Formation（D1 ps）of the lower *** structure was well-developed in this area,the ore bodies produced which mainly controlled by the *** was a diabasic dike in the northwest of this area,where the grade of the ore bodies was higher.2 S isotope geochemistry The composition ofδ34S in pyrites was 5.

关键词： Sulfur stratum geochemistry village northwest Isotope Golden county isotope mantle