辽宁后仙峪硼矿床氩-氩定年及其地质意义

CORC > 北京大学 > 地球与空间科学学院

	辽宁后仙峪硼矿床氩-氩定年及其地质意义; Ar-40-(39) Ar dating and its geological implication of the Houxianyu boron deposit, Liangning province.
	汤好书 ; 陈衍景 ; 武广
刊名	岩石学报
	2009
关键词	氩-氩年龄后仙峪硼矿床辽吉硼矿带辽河群华北克拉通 Ar-40-Ar-39 age Houxianyu boron deposit Liao-Ji boron belt Liaohe Group North China Craton
英文摘要	辽吉硼矿带是世界级非金属成矿省,但其成矿时代研究薄弱,成因类型和构造环境认识分歧。本文报道新获得的后仙峪超大型硼镁矿床金云母~(40)Ar-~(39)Ar年龄,并厘定成矿时代。主矿体金云母氩-氩坪年龄为884.4±8.9Ma(MSWD=0.47),正、反等时线年龄分别为885.0±7.5 Ma(MSWD=0.55)和885.8±7.3 Ma(MSWD=0.79),表明主成矿事件发生在885Ma左右,可能与Rodinia超大陆汇聚事件有关。矿体与闪长岩脉接触带蚀变岩的金云母氩-氩坪年龄为386.5±3.9Ma(MSWD=1.4),正、反等时线年龄分别为386.7±5.3 Ma(MSWD=2.6)...; The Liao-Ji giant boron belt is a world-class non-metallic ore province, but its metallogenic time has not been well constrained yet. The metallogenic type and tectonic setting of the Liao-Ji boron belt are still controversial. In this paper we present new Ar-40/Ar-39 phlogopite ages for the Houxianyu Boron deposit to time the boron mineralization. Phlogopite grains separated front the major ore-body yield Ar-40/Ar-39 plateau age of 884.4 +/- 8.9Ma (MSWD = 0.47), isochron age of 885.0 +/- 7.5Ma (MSWD = 0.55) and anti-isochron age of 885.8 +/- 7.3Ma (MSWD = 0.79), respectively. This shows that the boron mineralization mainly occurred at ca 885 Ma and might be genetically related to the assembly of the Rodinia supercontinent. Whilst the phlogopite grains separated from contact-zone metasomatite between ore-body and diorite dyke yield Ar-40/Ar-39 plateau age of 386.5 +/- 3.9 Ma (MSWD = 1.4), isochron age of 386.7 +/- 5.3 Ma (MSWD = 2.6) and anti-isochron age of 387.1 +/- 7.2 Ma (MSWD = 3.9 respectively, reflecting a post-ore overprint event which was possibly related to the Early Devonian magmatism.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000273455000005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 1; 11; 2752-2762; 25
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/179776]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	汤好书,陈衍景,武广. 辽宁后仙峪硼矿床氩-氩定年及其地质意义, Ar-40-(39) Ar dating and its geological implication of the Houxianyu boron deposit, Liangning province.[J]. 岩石学报,2009.
APA	汤好书,陈衍景,&武广.(2009).辽宁后仙峪硼矿床氩-氩定年及其地质意义.岩石学报.
MLA	汤好书,et al."辽宁后仙峪硼矿床氩-氩定年及其地质意义".岩石学报 (2009).