40Ar/39Ar Dating for Kfeldspar from Duobuza Porphyry Coppergold Deposit in Tibet, China and Its Geological Significance

Abstract

Abstract:

Duobuza porphyry coppergold deposit is a newly discovered deposit, which is located in the middle of Tibet plateau and in the west of BangonghuNujiang metallogenic belt. K-feldspar from the potassic alteration zone was analyzed by ⁴⁰Ar/³⁹Ar dating technique, and these results yielded a plateau age of (118.31±0.60) Ma and a reverse isochron age of (118.30±0.79) Ma with initial 40Ar/36Ar=291±17, indicating that potassic alteration age in Duobuza porphyry deposit ranges from 119 to 118 Ma and coincide with the mineralization age (molybdenite Re-Os age, 119-118 Ma ). The magmatichydrothermal evolution of Duobuza deposit should be from magmatic stage (around 120 Ma) to potassic alteration and mineralization (119-118 Ma), then to phyllic alteration (118-115 Ma), and the duration of magmatichydrothermal evolution probably persisted 5 million years.

Key words: ⁴⁰Ar/³⁹Ar age, Kfeldspathic alteration, Duobuza porphyry deposit;BangonghuNujiang metallogenic belt, Tibet

CHU Xiang-Beng, CHEN Hua-An, MA Dong-Fang, HUANG Han-Xiao, LI Guang-Meng, Liu-Chao-Jiang, WEI Lu-Jie. ⁴⁰Ar/³⁹Ar Dating for Kfeldspar from Duobuza Porphyry Coppergold Deposit in Tibet, China and Its Geological Significance[J]. Geoscience, 2012, 26(4): 656-662.

References

［1］郑有业, 薛迎喜, 程力军, 等. 西藏驱龙超大型斑岩铜(钼) 矿床:发现、特征及意义
[J]. 地球科学: 中国地质大学学报, 2004, 29(1): 103-108.
［2］杨志明, 侯增谦, 宋玉财, 等. 西藏驱龙超大型斑岩铜矿床:地质、蚀变与成矿
[J]. 矿床地质, 2008, 27(3): 279-318.
［3］唐菊兴, 邓世林, 郑文宝, 等. 西藏墨竹工卡县甲玛铜多金属矿床勘查模型
[J]. 矿床地质, 2011, 30(2): 179-196.
［4］Hou Z Q, Ma H W, Khin Z, et al. The Himalayan Yulong porphyry copper belt: produced by largescale strikeslip faulting at Eastern Tibet
[J]. Economic Geology，2003, 98(1): 125-145.
［5］王功文，陈建平. 矿床四维时空定量评价的新认识：以西藏玉龙斑岩铜矿床为例
[J]. 现代地质, 2004,18(4):537-542.
［6］王功文，杜杨松. 玉龙铜矿带成矿多元信息综合分析与找矿靶区优选
[J]. 现代地质, 2000,14(2):158-164.
［7］马鸿文.论藏东玉龙斑岩铜矿带成岩成矿物质来源
[J]. 现代地质, 1988,2(4):429-439.
［8］马鸿文.藏东玉龙斑岩铜矿带岩浆作用的物理化学条件
[J]. 现代地质, 1987,1(2):238-252.
［9］曲晓明, 辛洪波. 藏西班公湖斑岩铜矿带的形成时代与成矿构造环境
[J]. 地质通报, 2006, 25(7): 792-799.
［10］李金祥, 李光明, 秦克章, 等. 班公湖带多不杂富金斑岩铜矿床斑岩-火山岩的地球化学特征与时代: 对成矿构造背景的制约
[J]. 岩石学报, 2008, 24(3): 531-543.
［11］佘宏全, 李进文, 马东方，等.西藏多不杂斑岩铜矿床辉钼矿Re-Os和锆石U-Pb SHRIMP测年及地质意义
[J]. 矿床地质, 2009, 28(6): 737-746.
［12］Li J X, Qin K Z, Li G M, et al. Magmatichydrothermal evolution of the Cretaceous Duolong goldrich porphyry copper deposit in the Bangongco metallogenic belt, Tibet: Evidence from UPb and 40Ar/39Ar geochronology
[J]. Journal of Asian Earth Sciences, 2011, 41(6): 525-536.
［13］李光明, 李金祥, 秦克章, 等.西藏班公湖带多不杂超大型富金斑岩铜矿的高温高盐高氧化成矿流体: 流体包裹体证据
[J]. 岩石学报, 2007, 23(5): 935-952.
［14］Li J X, Li G M, Qin K Z, et al. Hightemperature magmatic fluid exsolved from magma at the Duobuza porphyry coppergold deposit, Northern Tibet
[J]. Geofluids, 2011, 11: 134-143.
［15］祝向平, 陈华安, 马东方, 等，西藏波龙斑岩铜金矿床的Re-Os同位素年龄及其地质意义
[J].岩石学报，2011，27(7): 2159-2164.
［16］Shi R D, Yang J S, Xu Z Q, et al. The Bangong Lake ophiolite (NW Tibet) and its bearing on the tectonic evolution of the BangongNujiang suture zone
[J]. Journal of Asian Earth Sciences, 2008, 32: 438-457.
［17］Shi R D. SHRIMP dating of the Bangong Lake SSZtype ophiolite: Constraints on the closure time of the ocean in the Bangong LakeNujiang River, northwestern Tibet
[J]. Chinese Science Bulletin, 2007, 52 (7): 936-941.
［18］李光明, 段志明, 刘波, 等. 西藏班公湖—怒江结合带北缘多龙地区侏罗纪增生杂岩的识别及意义
[J]. 地质通报, 2011, 30(8): 1256-1260.
［19］祝向平, 陈华安, 马东方, 等. 西藏多不杂斑岩铜金矿床地质与蚀变
[J]. 地质与勘探, 2012, 48(2): 199-206.
［20］李建峰, 张志诚, 韩宝福. 内蒙古达茂旗北部闪长岩锆石SHRIMP U-Pb、角闪石40Ar/39Ar年代学及其地质意义
[J]. 岩石矿物学杂志, 2010, 29(6): 732-740.
［21］Ludwig K R. Users Manual for Isoplot/Ex Version 30：A Geochronological Toolkit for Microsoft Excel
[M]. Berkeley: Berkeley Geochronology Center, 2003: 1-70.
［22］Reynolds P, Ravenhurst C, Zentilli M, et al. Highprecision 40Ar/39Ar dating of two consecutive hydrothermal events in the Chuquicamata porphyry copper system, Chile
[J]. Chemical Geology, 1998, 148(1/2): 45-60.
［23］Harris A C, Dunlap J, Reiners P W, et al. Multimillion year thermal history of a porphyry copper deposit: application of UPb, 40Ar/39Ar and (UTh)/He chronometers, Bajo de la Alumbrera coppergold deposit, Argentina
[J]. Mineralium Deposita, 2008, 43(3):295-314.
［24］Deckart K, Clark A H, Aguilar C, et al. Magmatic and hydrothermal chronology of the giant Rio Blanco porphyry copper deposit, central Chile: implications of an integrated UPb and 40Ar/39Ar database
[J]. Economic Geology, 2005, 100(5): 905-934.
［25］Perkins C, McDougall I, ClaouéLong J, et al. 40Ar/39Ar and UPb geochronology of the Goonumbla porphyry CuAu deposits, New South Wales, Australia
[J]. Economic Geology, 1990, 85(2): 1808-1824.
［26］Parsons I, Brown W L, Smith J V. 40Ar/39Ar thermochronology using alkali feldspars: real thermal history or mathematical mirage of microtexture
[J]. Contributions to Mineralogy and Petrology, 1999, 136(1): 92-110.
［27］Lovera O M, Grove M, Harrison T M. Systematic analysis of Kfeldspar 40Ar/39Ar step heating results II: Relevance of laboratory argon diffusion properties to nature
[J]. Geochimica et Cosmochimica Acta, 2002, 66(7): 1237-1255.
［28］Seedorff E, Dilles J H, Proffett J M J, et al. Porphyry deposits: characteristics and origin of hypogene features
[M]//Hedenquist J W, Thompson J F H, Goldfarb R J, et al. Economic Geology 100th Anniversary Volume. Littleton: Society of Economic Geologists, 2005: 251-298.
［29］Sillitoe R H. Epochs of intrusionrelated copper mineralization in the Andes
[J]. Journal of South American Earth Sciences, 1988, 1(1): 89-108.
［30］Redmond P B, Einaudi M T, Inan E E, et al. Copper deposition by fluid cooling in intrusioncentered systems: new insights from the Bingham porphyry ore deposit, Utah
[J]. Geology, 2004, 32(3): 217-220.
［31］Rusk B, Reed M H, Dilles J H, et al. Compositions of magmatichydrothermal fluids determined by LAICPMS of fluid inclusions from the porphyry coppermolybdenum deposit at Butte, Montana
[J]. Chemical Geology, 2004, 210(1/4): 173-199.
［32］Heinrich A C. Fluidfluid interactions in magmatichydrothermal ore formation
[J]. Reviews in Mineralogy and Geochemistry, 2007, 65(1): 363-387.
［33］Sillitoe R H. Porphyry copper systems
[J]. Economic Geology, 2010, 105(1): 3-41.
［34］Sillitoe R H, Perelló J. Andean copper province: Tectonomagmatic settings, deposit types, metallogeny, exploration, and discovery
[M]//Hedenquist J W, Thompson J F H , Goldfarb R J, et al. Economic Geology 100th Anniversary Volume. Littleton: Society of Economic Geologists, 2005: 845-890.
［35］侯增谦, 曲晓明, 黄卫, 等. 冈底斯斑岩铜矿成矿带有望成为西藏第二条“玉龙”铜矿带
[J]. 中国地质, 2001, 28(10): 27-40.

[1]	WANG Jianhua, ZHU Youan, LI Qiang. Sedimentary and Paleontological Characteristics of Early Devonian Sequence in the Pali Area in Yadong, South Tibet [J]. Geoscience, 2024, 38(01): 224-229.
[2]	LI Yuchun, XIAO Shiqi. Characteristics of the Geoheritage in Xigaze of Tibet and Its Feasibility for Geopark Construction [J]. Geoscience, 2024, 38(01): 260-268.
[3]	LI Junlei, ZHANG Xujiao, WANG Yifan, ZHANG Xiangge, WANG Chongge, YUAN Xiaoning, LIU Xinlan, WANG Kaiya, RAO Haoshu, LIU Jiang, QIN Yuan. Route Planning and Ponder of Geoscience Study Travel in Hualong County, Qinghai Province [J]. Geoscience, 2023, 37(05): 1411-1422.
[4]	LOU Yuanlin, CHENG Ming, TANG Yao, ZHANG Chaoming, LAN Jingzhou, YUAN Yongsheng, YANG Tao. Geochemical Characteristics,Tectonic Setting, and Mineralization of Magmatic Rocks in Gudui Area, Southern Tibet [J]. Geoscience, 2023, 37(02): 353-374.
[5]	LIU Xinlan, ZHANG Xujiao, LI Junlei, WANG Yifan, ZHANG Xiangge, YUAN Xiaoning, WANG Kaiya, WANG Chongge, LIU Jiang, HOU Engang. Characteristics and Scientific Values of “Canyon and Danxia” Landform in Hualong County, Qinghai Province [J]. Geoscience, 2023, 37(01): 233-244.
[6]	DU Baofeng, ZHANG Rongzhen, YANG Changqing, LI Shanpo, TAN Heyong, ZHU Hongyun. Sulfur and Lead Isotopic Compositions of Zebuxia Pb-Zn Deposit in Tibet:Implications for the Sources of Ore-forming Material [J]. Geoscience, 2022, 36(04): 1138-1145.
[7]	HU Mengjun, JI Tianqi, ZHENG Dengyou, ZHUANG Jing, SUN Wenli, XU Aokang. Variation Characteristics of Chromatic Parameters of Eolian Sediments and Environmental Evolution on the Northeastern Tibetan Plateau Since 9.4 ka [J]. Geoscience, 2022, 36(02): 439-448.
[8]	FANG Nianqiao. Practice and Thinking on the Study of “Sea-Land Correlation” [J]. Geoscience, 2022, 36(01): 1-13.
[9]	CHEN Yaofei, HOU Engang, GAO Jinhan, XIAO Hongji, WANG Genhou. Sedimentary Environment and Tectonic Significance of the Upper Triassic Rigain Pünco Formation in the Rongma Region, Tibet, China [J]. Geoscience, 2022, 36(01): 48-57.
[10]	CHEN Shumin, MIAO Yu, LIAO Jia, HE Qianping, CHENG Ming, ZHANG Zhenli, WU Shaoan, ZHANG Zhiming. Crustal Evolution Constraints from the Petrogenesis of Late Cretaceous Konglong Volcanics on Southern Margin of Central Lhasa Subterrane [J]. Geoscience, 2021, 35(06): 1713-1726.
[11]	ZHANG Zhiping, ZHONG Kanghui, SHAN Shucheng, ZHENG Xin, HUANG Haozhen, YAN Zhao. Late Cretaceous Evolution of the Neo-Tethys:Evidence from Geochronology, Geochemistry, and Sr-Nd Isotopes of Gongguori Monzogranite in Zedang [J]. Geoscience, 2021, 35(05): 1194-1205.
[12]	CHEN Jing, LI Dapeng, KANG Huan, GENG Jianzhen, ZHANG Jingjing. Provenances and Tectonic Significance of Detrital Zircons from the Triassic to Jurassic Sedimentary Rocks in the Diancangshan Metamorphic Massif, Western Yunnan Province [J]. Geoscience, 2021, 35(04): 883-913.
[13]	GUO Changbao, WU Rui’an, JIANG Liangwen, ZHONG Ning, WANG Yang, WANG Dong, ZHANG Yongshuang, YANG Zhihua, MENG Wen, LI Xue, LIU Gui. Typical Geohazards and Engineering Geological Problems Along the Ya’an-Linzhi Section of the Sichuan-Tibet Railway,China [J]. Geoscience, 2021, 35(01): 1-17.
[14]	WANG Jiazhu, GAO Yanchao, RAN Tao, TIE Yongbo, ZHANG Fan. Analysis of Genetic Mechanism and Failure Mode of a Large Paleo-landslide in Sichuan-Tibet Railway Transportation Corridor [J]. Geoscience, 2021, 35(01): 18-25.
[15]	YAN Yiqiu, YANG Zhihua, ZHANG Xujiao, MENG Shaowei, GUO Changbao, WU Ruian, ZHANG Yiying. Landslide Susceptibility Assessment Based on Weight-of-Evidence Modeling of the Batang Fault Zone, Eastern Tibetan Plateau [J]. Geoscience, 2021, 35(01): 26-37.

⁴⁰Ar/³⁹Ar Dating for Kfeldspar from Duobuza Porphyry Coppergold Deposit in Tibet, China and Its Geological Significance

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments