37 5 2018 9 GeologicalScienceandTechnologyInformation Vol.37 No.5 Sep. 2018 doi:10.19509/j.cnki.dzkq.2018.0521. [J]. 201837(5):154-161. 1 2 3 1 2 2 1 (1. 810001;2. ( ) 430074;3. 350013) : 3 ( ) 3 SE SE : ; ; ; ; :P618.42;P618.43 :A :1000-7849(2018)05-0154-08 640 tpb+ Zn 10% ;20 90 ( VMS ) [1] ;20 90 1 [2-7] SEDEX ; - [114] - [15-22] (VSHMS) - [8-11] [8-1223] - - ( 1) [12] [13] - :2018-04-28 : : ; (41172087) : (1984 ) E-mail:261955232@qq.com : (1969 ) E-mail:sunhsh@cug.edu.cn
5 : 155 1 ( [6] ) Fig.1 GeologicalmapofXitieshanPb-Znminingarea ( ); - 2 [6] - - (Mλπ) ( a-1 b ) (a-2 ) - - ( 2-A) (d ) - ( ) [1123] ; c ( 2-B) [6] [24-25] ; ( ) [26] ; 50% ; 2 - a-2 b ; : 2000 ( ) 0
地 质 科 技 情 报 １５６ ２０１８ 年 Ａ 含流纹斑岩角砾石英钠长岩 Ｂ 弱蚀变碎裂状流纹斑岩 Ｃ 大理岩角砾矿石 Ｄ 棱角状 隐 爆 闪 锌 矿 Ｅ 硅 化 碎 裂 岩 Ｆ 交 代 残 留 长石双晶纹 Ｇ 复成分角砾矿石 Ｈ 复成分角砾矿石 Ｉ 胶状黄铁矿破碎 Ｊ 碎裂状闪锌矿 Ｋ 矿体顶板强硅化大理岩 Ｌ 含 脉 状 闪 锌矿化石英钠长岩 Ｍ 混杂状流纹斑岩 肉红色 绿片岩角砾 Ｎ 可拼贴角砾 Ｏ 网脉状黄铁矿磁黄铁矿化蚀变岩 图 ２ 喷流管道相岩性组合特征 Ｆｉｇ ２ Ｔｈｅｌ ｉｔｈｏｌｏｇｉｃｃｏｍｂｉｎａｔｉｏｎｃｈａｒａｃｔｅｒｉｓｔｉｃｏｆｔｈｅｅｘｈａｌａｔｉｖｅｃｏｎｄｕｃｔ 原位测试分析结果 因篇幅考虑 硫同位素数据另文 发表 相结合 目前在矿区识别出 ３ 处海底喷流管道 相 现将其位置及特征阐释如下 ２ １ 锡铁山沟海底喷流管道相 ５９ ４７ 线之间 该地段地表 ａ ２ 岩段大理岩内部广 泛 发 育 角 砾 状铅锌矿石 角砾 成 分 为 大 理 岩 粒 径 大 小 不 等 棱 角分明 弱定向 常 见 可 拼 贴 结 构 角 砾 之 间 被 铅 锌 硫化物充填胶结 图 ２ Ｃ 镜 下 硫 化 物 多 呈 棱 角 状 不规则状 以闪锌矿 为 主 少 量 方 铅 矿 和 黄 铁 矿 图 ２ Ｄ 坑道调查显示 该地段矿体顶板附近常见强硅 化岩发育 岩 石 内 部 显 微 破 碎 及 定 向 构 造 明 显 图 ２ Ｅ 局部见残存长石斑 晶 的 双 晶 纹 图 ２ Ｆ 以 上
5 : 157 ; ( 3); δ 34 S 1.8 ~30.4 ( ) δ 34 S( 3 ~5 ) 2.2 (31-26 ) ( ) 4 29 Fig.4 No.29explorationlinesection ( 2-GH) ( 2-I) ( 2-J) (1) ( 2-K) (ZK44003-21ZK44007-19) 2200 m ( 4); ( 2-AL) δ 34 S -5.3 ~2.9 δ 34 S(3 ~5 ) 2200 m δ 34 S -1.5 ~32 2 3 Fig.3 47 No.47explorationlinesection (2) ZK98007-2 ZK44011-13 ( 2-M) ( 2-N) ( 2-O) ZK98007-2 2.3 (03-011 ) 5 03-011 ( 2762m )
158 2018 5 Fig.5 07 No.07explorationlinesection 3 ; ( 3 ) 6 - ( ) - (460 ( ) Ma) [8-9] ( ) ) XRD ( ( 2-MN) 1) [27] F 1 F 2 ( 1) F 2 ( 2-A) ( 2-K) ( 2-F) ( 6) ( 2-E) 4 ( )
5 : 159 1 ZK440003-21 XRD Table1 X-raydifractionoftheimandriterockpowderfordril-coreZK44003-21inXitieshanPb-Znoredeposit ZK44003-21-11 ZK44003-21-12 ZK44003-21-13 ZK44003-21-14 ZK44003-21-21 XRD (w B /%) 24.3; 7.1; 2.7; 1.1; 4.5; 38.3; 0.7; 21.2 9.3; 6.5; 42.8; 22.0; 14.2; 5.2 14.2; 7.7; 31.5; 3.2: 24.9; 17.3; 1.2 0.1; 23.9; 7.6; 10.2; 27.0; 13.3; 14.9; 2.9 14.5; 5.4; 26.5; 33.1; 20.4 : ; : X XRD-Terra 9 (9 ) 2 ( 23-9 35-31 55-50 7) (2) 2762 m 2642 m 2000 m 2822m 2582m 2100 m( 3~ 5) (3) ( 3~ 5) ) ; 5 (1) NE NE NE 31-23 6 NE 03-011 Fig.6 Sketchingforearlysubmarineexhalativeandlateorogenicre- ( 1) [1-2] formingprocessofxitieshanpb-zndeposit (1) 7 I30 31 29 110 m( ( 4)Pb+Zn 25%;IV330 03 NE 035-041 NE 07 60 m( 5)Pb+Zn 0135-0147 1) 12% 03-011
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5 : 161 exhumationofhp/uhp metamorphicrocks[j].journalofa- sianearthsciences200935(3):245-258. [21]. [25]. [J]. 200377(2):163-176. [22]. [26]. [J]. 200322(7):487-493. [23]..2012. [J]. 201039(3):229-239. [J]. 201488(6):1081-1092. [D]. : 2014. [C] [27]. [J]. [24]. c 200023(3):147-152. IdentificationoftheSubmarineExhalativeConductand ItsSignificancesforOre-ControlingGenesisand Ore-FindingXitieshanPb-ZnDepositQinghaiProvince ZhongYongsheng 1 Sun Huashan 2 GeFengjian 3 SunLi 1 FanQianrong 2 WangRuyi 2 ZhangDelong 1 (1.Western MiningIncorporatedCompanyXining810001China; 2.FacultyofEarthResourceChinaUniversityofGeosciences(Wuhan)Wuhan430074China; 3.FujianInsititueofGeologicalSurveyFuzhou350013China) Abstract:TheXitieshanlead-zincdepositislocatedinthemiddleofthenorthernmarginoftheQaidam Ba- sinwhiletherehavebeencontroversiesregardingthegenesisofthedeposit.theunderstandingofthe genesisofdepositsdirectlyafectsthechoiceofore-controlingfactorswhichinturndeterminesthestudy ofmetalogenicregularityandthedirectionofprospecting.integratinggeologicalsurveydril-corelog- gingpetrographywithexploration mapsandsulfurisotopecharacteristicsthis workidentifiesthree submarineexhalativeconductivelocationswhichroughlymatchwiththreegorgescross-cutingtanjians- hangroupinxitieshanpb-znoredepositqinghaiprovince.theexhalativeconductconsistsofhydro- thermalcryptoexplosivebrecciaindeepalteredrocksin middleandpolymicticbrecciaoresinupper tedasthefirstore-findingtargetatpresent. namedastrinity.inadditionbasedonthecharacteristicsoftheexhalativeconducttheearlyseafloorex- halationprocessinxitieshanlead-zincdepositwasreconstructed.mineralizationrichisaroundtheexhala- tiveconductinparticularthecryptoexplosiverhyolitichydrothermalbrecciacontrolsthebotomofthe orebodyandlateralplungingtowardsoutheastern.accordinglythedeepareaofzhongjiangouisdelinea- Keywords:exhalativeconduct;oredepositgenesis;ore-controlingprocess;ore-findingimplication;Xities- hanpb-zndeposit