|
|
|
| LA-ICP-MS zircon U-Pb geochronology and geochemistry of the intermediate-acid intrusion in the periphery of Jiajika deposits in Western Sichuan Province |
| LI Mingze1,2, QIN Yulong1,2, ZHAO Chun1,2, ZHAN Hanyu1,2, ZHOU Xiong3, SUN Guangyin4 |
1. Key Laboratory for Strategic Resources Evaluation and Utilization of Rare Metals and Rare Earth, Sichuan Province, Chengdu 610081, China;
2. Sichuan Institute of Geological Survey, Chengdu 610081, China;
3. Chengdu Institute of Multiple Utilization of Mineral Resources, China Geological Survey, Chengdu 610041, China;
4. No.113 Geological Team of Sichuan Bureau of Geology and Mineral Resources, Luzhou 646000, China |
|
|
|
|
Abstract The Jianbacun intermediate-acid intrusion was newly discovered in the peripheral area of Jiajika deposits. The authors have conducted the research of LA-ICP-MS zircon U-Pb geochronology and geochemistry to discuss its forming age, tectonic setting and mineralization condition. The results show that the zircon crystalizing age is (211.8±1.0) Ma, and the rock belongs to calc-alkaline-metamluminous rock series, with properties of I-type granitoid, which may originate from partial melting of materials from crust and mantle. The geochemical characteristics indicate that the rock formed in post-collision setting, corresponding to the widespread regional magmatism in Western Sichuan Province during the Late Triassic. The tectonic setting property and magmatism of Jianbacun quartz diorite indicate that this area may be inadequate for the mineralization related to pegmatite mineral deposits.
|
|
Received: 27 May 2019
|
|
|
|
|
|
[1] 王全伟,王康明,阚泽忠,等.川西地区花岗岩及其成矿系列[M].北京:地质出版社,2008.
[2] 郝雪峰,付小方,梁斌,等.川西甲基卡花岗岩和新三号矿脉的形成时代及意义[J].矿床地质,2015,34(6):1199-1208.
[3] 付小方,侯立玮,梁斌.甲基卡式花岗伟晶岩型锂矿床成矿模式与三维勘查找矿模型[M].北京:科学出版社,2017.
[4] 王登红,王成辉,孙艳,等.我国锂铍钽矿床调查研究进展及相关问题简述[J].中国地质调查,2017,4(5):1-8.
[5] 《中国矿床发现史·四川卷》编委会.中国矿床发现史·四川卷[M].北京:地质出版社,1996.
[6] 徐云峰,秦宇龙,王显锋,等.四川容须卡伟晶岩型锂多金属矿床地球化学特征及成矿地质条件[J].中国地质调查,2019,6(1):34-40.
[7] 梁斌,付小方,唐屹,等.川西甲基卡稀有金属矿区花岗岩岩石地球化学特征[J].桂林理工大学学报,2016,36(1):42-49.
[8] 侯立玮,付小方.松潘—甘孜造山带东缘穹隆状变质地质体[M].成都:四川大学出版社,2002.
[9] Andersen T.Correction of common lead in U-Pb analyses that do not report 204Pb[J].Chem Geol,2002,192(1/2):59-79.
[10] 袁洪林,吴福元,高山,等.东北地区新生代侵入体的锆石激光探针U-Pb年龄测定与稀土元素成分分析[J].科学通报,2003,48(14):1511-1520.
[11] Ludwig K R.ISOPLOT 3.00:A Geochronological Toolkit for Microsoft Excel[M].Berkeley:Berkeley Geochronology Center,2003.
[12] Hoskin P O W,Schaltegger U.The composition of zircon and igneous and metamorphic petrogenesis[J].Rev Mineral Geochem,2003,53(1):27-62.
[13] Middlemost E A K.Naming materials in the magma/igneous rock system[J].Earth Sci Rev,1994,37(3/4):215-224.
[14] Maniar P D,Piccoli P M.Tectonic discrimination of granitoids[J].GSA Bull,1989,101(5):635-643.
[15] Middlemost E A K.Magmas and Magmatic Rocks:An Introduction to Igneous Petrology[M].Harlow:Longman,1985.
[16] Peccerillo A,Taylor S R.Geochemistry of eocene calc-alkaline volcanic rocks from the Kastamonu area,Northern Turkey[J].Contrib Mineral Petrol,1976,58(1):63-81.
[17] Sun S S,McDonough W F.Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and proce-sses[J].Geol Soc London Spec Publ,1989,42(1):313-345.
[18] 李名则,秦宇龙,李峥,等.川西甲基卡二云母花岗岩与伟晶岩脉地球化学特征及其地质意义[J].岩石矿物学杂志,2018,37(3):366-378.
[19] 许志琴,侯立玮,王宗秀,等.中国松潘—甘孜造山带的造山过程[M].北京:地质出版社,1992.
[20] 周家云,谭洪旗,龚大兴,等.川西江浪穹隆核部新火山花岗岩LA-ICP-MS锆石U-Pb定年和Hf同位素研究[J].矿物岩石,2013,33(4):42-52.
[21] Pearce J.Sources and settings of granitic rocks[J].Episodes,1996,19(4):120-125.
[22] Pearce J A,Harris N B W,Tindle A G.Trace element discrimination diagrams for the tectonic interpretation of granitic rocks[J].J Petrol,1984,25(4):956-983.
[23] 刘新秒. 后碰撞岩浆岩的大地构造环境及特征[J].前寒武纪研究进展,2000,23(2):121-127.
[24] 李建康,王登红,张德会,等.川西伟晶岩型矿床的形成机制及大陆动力学背景[M].北京:原子能出版社,2007.
[25] 李建康,王登红,张德会,等.四川甲基卡伟晶岩型锂多金属矿床成矿流体来源研究[J].岩石矿物学杂志,2006,25(1):45-52.
[26] Thomas R,Davidson P,Beurlen H.The competing models for the origin and internal evolution of granitic pegmatites in the light of melt and fluid inclusion research[J].Mineral Petrol,2012,106(1):55-73. |
| [1] |
WU Wenhui, ZHAO Chun, ZHAN Hanyu, QIN Yulong, LI Mingze, XU Yunfeng. Geochemical characteristics of the pegmatite veins in Shaotangou area, Jiajika of Western Sichuan Province[J]. , 2021, 8(1): 71-79. |
| [2] |
HE Yongzhong, XIANG Kunpeng, AN Yayun, YI Chengxing, YANG Zhongqin, YU Ning. Geological characteristics and favorable areas prediction of shale gas in Wufeng-Longmaxi Formation in Zheng’an area of Northern Guizhou[J]. , 2020, 7(3): 21-29. |
| [3] |
ZHANG Jianfeng, WAN Taiping, LI Xinpeng, YANG Wenpeng, ZHAO Zhonghai, XU Donghai. Geochemical characteristics and evaluation of Nb and Ta deposits in Nianzishan area of Heilongjiang Province[J]. , 2020, 7(2): 30-38. |
| [4] |
WANG Panxi, WANG Zhenning. Geochemical characteristics and geological implication of adamellite in Yazigou area of Qimantag, Qinghai Province[J]. , 2020, 7(1): 38-46. |
| [5] |
CHEN Haidong, GAO Yong, HE Guoqiang, QIU Jinxiong, LU Ning. LA-ICP-MS zircon U-Pb ages and geochemical characteristics of Sangejing gabbro in Beishan area of Inner Mongolia[J]. , 2020, 7(1): 53-59. |
| [6] |
HE Jun, XIAO Pan, PENG Ke, XU Ke. Hydrogeochemical characteristics of the shallow pore water in Western Jianghan Plain[J]. , 2019, 6(5): 36-42. |
|
|
|
|
2020, Vol. 7 
