小兴安岭西北部与永新金矿有关岩浆岩的年代学和地球化学及成矿构造环境

摘要/Abstract

摘要：

永新金矿是近年发现的大型蚀变岩型脉状金矿床,闪长玢岩脉等与金矿脉相互穿切并侵入于上盘龙江组火山岩中。锆石LA-ICP-MS U-Pb测年显示,龙江组安山岩结晶年龄为(113.7 ± 1.8)Ma,闪长玢岩结晶年龄为(114.8 ± 1.9)Ma,均形成于早白垩世晚期。二者钠钾含量变化相对较大,相对富铝富铁、钙镁含量中等,从火山岩到脉岩表现为钙碱性向碱性系列过渡特征。火山岩、脉岩与矿石的稀土元素配分曲线有很好的一致性,矿石稀土含量低于岩石。岩石微量元素总体显示Zr、Hf、Nd、U等明显富集,而Nb、Ta、Th、P、Ti等明显亏损。在Sr/Y-Y和(La/Yb)_N-(Yb)_N图解中,所有样品均落入经典岛弧岩石范围;在Nb-Y、Ta-Yb的构造环境判别图中均处于火山弧岩浆岩区,在(La/Yb)_N-δEu变异图上落在壳-幔型岩浆范围。结合矿床稳定同位素及区域金矿时空分布规律等综合特征,认为永新金矿的形成与早白垩世古太平洋板块俯冲所引发的(火山)岩浆活动有关。

关键词: 安山岩, 闪长玢岩, 锆石U-Pb定年, 地球化学特征, 构造环境, 永新金矿床, 小兴安岭

Abstract:

The Yongxin gold deposit is a large-scale fracture-controlled alteration type deposit found in Xiao Hinggan Mountains in recent years. The dioritic porphyry intersected with the orebodies and intruded into the hanging wall volcanic rocks of the Longjiang Formation. The LA-ICP-MS U-Pb zircon dating of the andesite and dioritic porphyry yield concordant ages of (113.7±1.8) Ma and (114.8±1.9) Ma, respectively, implying that they formed at the Early Cretaceous. The geochemical data of the andesite and dioritic porphyry show large variations in Na and K contents, intermediate concentrations of Ca and Mg and enrichment in Al and Fe. From the volcanic rocks to the dyke, the petrochemical features indicate a transition from calc-alkaline to alkaline. They display uniform REE distribution patterns with ores, but the ores exhibit relatively lower REE concentration. The trace elements of the samples generally enrich in Zr, Hf, Nd and U, and deplete in Nb, Ta, Th, P and Ti. The samples are plotted into the field of classic island arc rocks in Sr/Y vs. Y and (La/Yb)_N vs.(Yb)_N discrimination diagrams, and the field of volcanic arc granite in Nb vs. Y and Ta vs. Yb diagrams, and the crust-mantle granite field in the (La/Yb)_N vs. δEu diagram. Combined with the S, Pb and Fe isotopes of pyrite, spatial and temporal distribution of regional gold deposits and geochemical features of rocks and ores, we suggest that the formation of the Yongxin gold deposit are genetically related to the volcanic-magmatism associated with upwelling of mantle materials trigged by the rollback of subducted paleo-Pacific plate in the Early Cretaceous.

Key words: andesite, diorite porphyry, zircon U-Pb age, geochemical characteristic, tectonic implication, Yongxin gold deposit, Xiao Hinggan Mountains

中图分类号:

P588.13
P597

李成禄, 徐文喜, 于援帮, 李光辉, 李胜荣, 袁茂文, 李士胜, 徐国战. 小兴安岭西北部与永新金矿有关岩浆岩的年代学和地球化学及成矿构造环境[J]. 现代地质, 2017, 31(06): 1114-1130.

LI Chenglu, XU Wenxi, YU Yuanbang, LI Guanghui, LI Shengrong, YUAN Maowen, LI Shisheng, XU Guozhan. Geochronology and Geochemistry of the Ore-related Magmatic Rocks from the Yongxin Gold Deposit, Northwest Xiao Hinggan Mountains and Their Ore-forming Tectonic Implication[J]. Geoscience, 2017, 31(06): 1114-1130.

图/表 17

参考文献 66

[1]	LIU J L, ZHAO S J, COOK N J, et al. Bonanza-grade accumulations of gold tellurides in the Early Cretaceous Sandaowanzi deposit, northeast China[J]. Ore Geology Reviews, 2013, 54(8): 110-126. DOI URL
[2]	李成禄, 曲晖, 赵忠海, 等. 黑龙江省霍龙门地区成矿地质特征及潜力分析[J]. 地质与资源, 2013, 22(4):273-278.
[3]	曲晖, 赵忠海, 李成禄, 等. 黑龙江永新金矿地质特征及成因[J]. 地质与资源, 2014, 23(6): 520-524.
[4]	袁茂文, 曾勇杰, 李成禄, 等. 黑龙江省嫩江—黑河构造混杂岩区永新金矿热液蚀变与矿化关系定量及定位研究[J]. 现代地质, 2017, 31(2): 278-289.
[5]	李成禄, 曲晖, 赵忠海, 等. 黑龙江霍龙门地区早石炭世花岗岩的锆石U-Pb年龄、地球化学特征及构造意义[J]. 中国地质, 2013, 40(3): 859-868.
[6]	曲晖, 李成禄, 杨福深. 小兴安岭西北部霍龙门地区花岗质杂岩锆石U-Pb 年龄、岩石地球化学特征及地质意义[J]. 世界地质, 2015, 34(1): 34-43.
[7]	ZONG K Q, KLEMD R, YUAN Y, et al. The assembly of Rodinia: The correlation of early Neoproterozoic (ca. 900 Ma) high-grade metamorphism and continental arc formation in the southern Beishan Orogen, southern Central Asian Orogenic Belt (CAOB)[J]. Precambrian Research, 2017, 290: 32-48. DOI URL
[8]	HU Z C, ZHANG W, LIU Y S, et al. “Wave” signal smoothing and mercury removing device for laser ablation quadrupole and multiple collector ICP-MS analysis: application to lead isotope analysis[J]. Analytical Chemistry, 2015, 87(2): 1152-1157. DOI URL
[9]	LIU Y S, HU Z C, GAO S, et al. In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard[J]. Chemical Geology, 2008, 257(1/2): 34-43. DOI URL
[10]	LIU Y S, GAO S, HU Z C, et al. Continental and oceanic crust recycling-induced melt-peridotite interactions in the Trans-North China Orogen: U-Pb dating, Hf isotopes and trace elements in zircons of mantle xenoliths[J]. Journal of Petrology, 2010, 51: 537-571. DOI URL
[11]	LUDWIG K R. ISOPLOT 3.00: A Geochronological Toolkit for Microsoft Excel[M]. Berkeley: Berkeley Geochronology Center, 2003:39.
[12]	邓晋福, 刘翠, 冯艳芳, 等. 关于火成岩常用图解的正确使用:讨论与建议[J]. 地质论评, 2015, 61(4):717-734.
[13]	LE Maitre R W. Igneous Rocks, A Classification and Glossary of Terms[M]. 2nd ed. Cambridge: Cambridge University Press, 2002: 1-236.
[14]	WRIGHT J B. A simple alkalinity ratio and its application to questions of non-orogenic granite genesis[J]. Geological Magazine, 1969, 106:370-384. DOI URL
[15]	刘宝山, 王少轶, 牛延宏, 等. 黑龙江黑河大新屯金矿区地质特征及成因机理初探[J]. 黄金, 2013, 34(11): 16-19.
[16]	王凤博, 杨言辰, 薄军委, 等. 大兴安岭北段上马场金矿床成矿特征及找矿标志[J]. 黄金, 2016, 37(9): 10-14.
[17]	郭奎城, 吕军, 谷华娟, 等. 黑龙江省北大沟金矿床矿石特征及金的赋存状态研究[J]. 地质与勘探, 2010, 46(4): 616-621.
[18]	余宇星, 许虹, 吴祥珂, 等. 黑龙江三道湾子金矿Au-Ag-Te 系列矿物特征及其成矿流体[J]. 岩石学报, 2012, 28(1): 345-356.
[19]	闫文强, 高树学, 杨凤喜, 等. 五道沟金矿床控矿因素及找矿方向[J]. 黄金科学技术, 2008, 16(3):43-44.
[20]	刘宝山. 黑龙江黑河孟德河金矿床控矿因素及找矿标志[J]. 黄金, 2015, 36(1): 18-21.
[21]	林超, 谈艳, 郭宇飞, 等. 黑龙江省科洛河韧性剪切带型金矿床地质、地球化学特征及成因[J]. 黄金, 2015, 36(4): 31-37.
[22]	白相东. 大兴安岭北段三道湾子碲化物型金矿床:矿床地质与成矿年代学研究[D]. 北京: 中国地质大学(北京), 2010: 36-42.
[23]	LIU J L, BAI X D, ZHAO S J, et al. Geology of the Sandaowanzi telluride gold deposit of the northern Great Xing’an Range, NE China: Geochronology and tectonic controls[J]. Journal of Asian Earth Sciences, 2011, 41(2):107-118. DOI URL
[24]	赵天宇, 赵海滨, 孙丰月, 等. 黑龙江三道湾子金矿床同位素年龄对成矿时代的约束[J]. 中国地质, 2013, 40(4): 1202-1208.
[25]	陈静, 孙丰月. 黑龙江三道湾子金矿床锆石U-Pb年龄及其地质意义[J]. 黄金, 2011, 32(5): 18-22.
[26]	吕军. 黑龙江省黑河市三道湾子金矿床地质特征、成矿条件及矿床模型[D]. 北京: 中国地质大学(北京), 2011:102-104.
[27]	ZHAI D G, LIU J J, EDWARD M. et al. Geochronological and He-Ar-S isotopic constraints on the origin of the Sandaowanzi gold-telluride deposit, northeastern China[J]. Lithos, 2015, 212/215:338-352. DOI URL
[28 ]	高燊. 黑龙江省黑河北部中生代金成矿研究[D]. 北京: 中国地质大学(北京), 2017: 124-125.
[29]	CHEN C, REN Y S, ZHAO H L, et al. Age, tectonic setting, and metallogenic implication of Phanerozoic granitic magmatism at the eastern margin of the Xing’an-Mongolian Orogenic Belt, NE China[J]. Journal of Asian Earth Sciences, 2017, 144(15):368-383. DOI URL
[30]	孟凡超, 刘嘉麒, 崔岩, 等. 中国东北地区中生代构造体制的转变: 来自火山岩时空分布与岩石组合的制约[J]. 岩石学报, 2014, 30(12): 3569-3586.
[31]	李云峰, 赵玥, 孙春林, 等. 黑龙江北部新生地区早白垩世龙江组火山岩年代学地球化学特征及其地质意义[J]. 世界地质, 2015, 34(1): 12-24.
[32]	赵书跃, 庞雪娇, 李德胜. 黑龙江三道湾子金矿含金石英脉与围岩地球化学及地质意义[J]. 地质与资源, 2016, 25(2): 130-136.
[33]	翟德高. 黑龙江省碲化物型金矿床地质地球化学特征与成矿机制[D]. 北京: 中国地质大学(北京), 2014: 29-42.
[34]	刘宝山, 吕军. 黑河市三道湾子金矿床地质、地球化学和成因探讨[J]. 大地构造与成矿学, 2006, 30(4):481-485.
[35]	DEFANT M J, DRUMMOND M S. Derivation of some modern arc magmas by melting of young subducted lithosphere[J]. Nature, 1990, 347: 662-665. DOI
[36]	PEARCE J A, HARRIS N B W, TINDLE A G. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks[J]. Journal of Petrology, 1984, 25(4): 956-983. DOI URL
[37]	曾涛, 王涛, 郭磊, 等. 东北新开岭地区晚中生代花岗岩类时代、成因及地质意义[J]. 吉林大学学报(地球科学版), 2011, 41(6): 1881-1900.
[38]	刘廷海, 佟卉, 李桂范, 等. 大杨树盆地中生代岩相特征及沉积模式[J]. 大庆石油学院学报, 2008, 32(6): 9-11.
[39]	WU F Y, LIN J Q, WILDE S A, et al. Nature and significance of the Early Cretaceous giant igneous event in Eastern China[J]. Earth and Planetary Science Letters, 2005, 233(1): 103-119. DOI URL
[40]	宋立忠, 赵泽辉, 焦贵浩, 等. 松辽盆地早白垩世火山岩地球化学特征及其构造意义[J]. 岩石学报, 2010, 26(4): 1182-1194.
[41]	WU F Y, SUN D Y, LI H M, et al. A-type granites in Northeastern China: age and geochemical constraints on their petrogenesis[J]. Chemical Geology, 2002, 187(1/2): 143-173. DOI URL
[42]	ZHANG Y B, WU F Y, WILDE S A, et al. Zircon U-Pb ages and tectonic implications of ‘Early Paleozoic’ granitoids at Yanbian, Jilin Province, northeast China[J]. Island Arc, 2004, 13(4): 484-505. DOI URL
[43]	WU F Y, SUN D Y, GE W C, et al. Geochronology of the Phanerozoic granitoids in northeastern China[J]. Journal of Asian Earth Sciences, 2011, 41(1): 1-30. DOI URL
[44]	江国明, 张贵宾, 徐峣. 中国东北地区太平洋板块精细俯冲特征[J]. 现代地质, 2012, 26(6): 1125-1135.
[45]	MA X H, CAO R, ZHOU Z H, et al. Early Cretaceous high-Mg diorites in the Yanji area,northeastern China: Petrogenesis and tectonic implications[J]. Journal of Asian Earth Sciences, 2015, 97: 393-405. DOI URL
[46]	葛文春, 吴福元, 周长勇, 等. 大兴安岭中部乌兰浩特地区中生代花岗岩的锆石U-Pb 年龄及地质意义[J]. 岩石学报, 2005, 21(3): 749-762.
[47]	MA X H, CHEN B, YANG M C. Magma mixing origin for the Aolunhua porphyry related to Mo-Cu mineralization, eastern Central Asian Orogenic Belt[J]. Gondwana Research, 2013, 24(3/4): 1152-1171. DOI URL
[48]	ZHANG F Q, CHEN H L, YU X, et al. Early Cretaceous volcanism in the northern Songliao Basin, NE China, and its geodynamic implication[J]. Gondwana Research, 2011, 19(1):163-176. DOI URL
[49]	WU F Y, JAHN B M, WILDE S A, et al. Phanerozoic continental crustal growth: U-Pb and Sr-Nd isotopic evidence from the granites in northeastern China[J]. Tectonophysics, 2000, 328(1/2): 89-113. DOI URL
[50]	JAHN B M, WU F Y, CAPDEVILA R, et al. Highly evolved juvenile granites with tetrad REE patterns: the Woduhe and Baerzhe granites from the Great Xing’an Mountain in NE China[J]. Lithos, 2001, 59(4):171-198. DOI URL
[51]	袁建国, 顾玉超, 肖荣阁, 等. 内蒙古锡林浩特东部地区早白垩世花岗岩地球化学、锆石U-Pb年龄及地质意义[J]. 现代地质, 2017, 31(1): 20-32.
[52]	罗飞, 罗照华, 李达靖, 等. 内蒙古中部白垩纪碱性花岗岩的发现及意义[J]. 现代地质, 1995, 9(2): 203-211.
[53]	杨增海, 王建平, 刘家军, 等. 内蒙古苏尼特左旗乌日尼图钨钼矿床同位素地球化学特征[J]. 现代地质, 2013, 27(1):13-23.
[54]	WANG T, ZHENG Y D, ZHANG J J, et al. Pattern and kinematic polarity of late Mesozoic extension in continental NE Asia: perspectives from metamorphic core complexes[J]. Tectonics, 2011, 30(6): TC6007.
[55]	SUN W D, DING X, HU Y H, et al. The golden transformation of the Cretaceous plate subduction in the west Pacific[J]. Earth and Planetary Science Letters, 2007, 262(3/4) : 533-542. DOI URL
[56]	包汉勇, 杨风丽, 王丹萍. 苏南地区中、古生界沉积岩地球化学特征——以圣科1井为例[J]. 吉林大学学报(地球科学版), 2011, 41(1): 29-38.
[57]	SHU L S, ZHOU X M, DENG P, et al. Mesozoic tectonic evolution of the Southeast China Block: New insights from basin analysis[J]. Journal of Asian Earth Sciences, 2009, 34(3): 376-391. DOI URL
[58]	ZHANG Z C, MAO J W, WANG Y B, et al. Geochemistry and geochronology of the volcanic rocks associated with the Dong’an adularia-sericite epithermal gold deposit, Lesser Hinggan Range, Heilongjiang province, NE China: Constraints on the metallogenesis[J]. Ore Geology Reviews, 2010, 37(3/4): 158-174. DOI URL
[59]	WANG Y B, ZENG Q D, LIU J M, et al. Rb-Sr dating of gold-bearing pyrites from Wulaga gold deposit and its geological significance[J]. Resource Geology, 2014, 64 (3): 262-270. DOI URL
[60]	WANG Y B, ZENG Q D, ZHOU L L, et al. The sources of ore-forming material in the low-sulfidation epithermal Wulaga gold deposit, NE China: Constraints from S, Pb isotopes and REE pattern[J]. Ore Geology Reviews, 2016, 76: 140-151. DOI URL
[61]	SUN J G, HAN S J, ZHANG Y, et al. Diagenesis and metallogenetic mechanisms of the Tuanjiegou gold deposit from the Lesser Xing’an Range, NE China: Zircon U-Pb geochronology and Lu-Hf isotopic constraints[J]. Journal of Asian Earth Sciences, 2013, 62: 373-388. DOI URL
[62]	HAO B W, DENG J, BAGAS L, et al. The Gaosongshan epithermal gold deposit in the Lesser Hinggan Range of the Heilongjiang Province, NE China: Implications for Early Cretaceous mineralization[J]. Ore Geology Reviews, 2016, 73: 179-197. DOI URL
[63]	刘瑞萍, 顾雪祥, 章永梅, 等. 黑龙江张三沟金矿区赋矿岩浆岩锆石U-Pb年龄及地质意义[J]. 矿物岩石地球化学通报, 2014, 33(5):645-653.
[64]	ZHANG P, HUANG X W, CUI B, et al. Re-Os isotopic and trace element compositions of pyrite and origin of the Cretaceous Jinchang porphyry Cu-Au deposit, Heilongjiang Province, NE China[J]. Journal of Asian Earth Sciences, 2016, 129(1): 67-80. DOI URL
[65]	柴鹏, 孙景贵, 门兰静, 等. 延边地区九三沟金矿床赋矿围岩的锆石U-Pb 年龄与成岩成矿时代[J]. 岩石矿物学杂志, 2012, 31(5):633-640.
[66]	孙明道. 中国东北及邻区白垩纪岩浆活动与古太平洋板块俯冲的关系[J]. 矿物岩石地球化学通报, 2016, 35(6): 1090-1097.

测点
18022-01	10.65	726	381	1.769 5	117	1.6	143	126	119	2.6	0.048 9	0.002 6	0.122 9	0.006 4	0.018 3	0.000 2
18022-02	63.30	777	663	1.121 4	448	3.4	465	52	445	6.6	0.056 3	0.001 3	0.562 3	0.013 4	0.072 0	0.000 6
18022-03	39.20	578	1 029	0.517 1	207	1.8	406	69	214	4.9	0.054 8	0.001 6	0.250 0	0.008 0	0.032 7	0.000 3
18022-04	32.90	554	795	0.663 9	212	2.7	809	112	257	10.8	0.066 1	0.003 4	0.315 2	0.019 4	0.033 4	0.000 4
18022-05	1.98	89	85	1.002 4	115	2.9	235	219	117	4.9	0.050 9	0.005 1	0.119 6	0.010 3	0.018 1	0.000 5
18022-06	2.51	135	110	1.176 8	108	2.2	456	186	105	3.6	0.055 9	0.004 8	0.128 0	0.010 0	0.016 8	0.000 3
18022-07	2.32	111	88	1.182 8	113	2.3	1 263	173	133	5.4	0.082 7	0.007 3	0.196 5	0.014 8	0.017 6	0.000 4
18022-08	3.60	217	141	1.470 3	112	1.8	109	224	109	3.2	0.048 2	0.003 4	0.115 1	0.007 7	0.017 5	0.000 3
18022-09	68.90	552	1 157	0.453 7	324	3.8	800	74	365	12.7	0.065 8	0.002 4	0.477 8	0.019 6	0.051 5	0.000 6
18022-10	26.55	377	700	0.511 6	205	2.2	276	76	205	5.0	0.051 8	0.001 7	0.231 1	0.007 4	0.032 2	0.000 3
18022-11	7.29	417	236	1.643 0	116	1.8	1 544	93	139	3.3	0.095 8	0.004 7	0.238 8	0.011 0	0.018 2	0.000 3
18022-12	2.77	133	114	1.112 1	116	2.4	220	227	109	4.0	0.050 5	0.004 2	0.123 3	0.009 9	0.018 1	0.000 4
18022-13	2.88	144	114	1.179 4	112	2.4	833	179	133	9.5	0.066 5	0.005 7	0.160 3	0.013 7	0.017 6	0.000 4
18022-14	2.79	113	116	0.928 7	115	2.4	676	172	125	4.7	0.062 1	0.005 0	0.152 3	0.011 9	0.018 0	0.000 4
18022-15	22.45	318	400	0.778 3	286	3.3	483	96	289	6.7	0.056 8	0.002 5	0.356 9	0.015 4	0.045 4	0.000 5
18022-16	1.72	79	72	1.065 4	116	3.2	733	269	106	4.6	0.061 8	0.007 7	0.141 4	0.015 0	0.018 1	0.000 5
18022-17	2.34	114	92	1.196 5	112	2.4	922	244	126	4.8	0.069 5	0.008 0	0.166 8	0.019 6	0.017 6	0.000 4
18022-18	3.44	166	146	1.030 4	113	2.1	124	193	114	3.7	0.048 5	0.004 2	0.114 7	0.009 1	0.017 6	0.000 3
18022-19	3.60	230	133	1.555 5	111	2.3	483	152	112	3.4	0.056 8	0.003 9	0.134 0	0.008 5	0.017 3	0.000 4
18022-20	2.01	88	84	1.005 7	118	2.7	146	215	117	5.1	0.049 0	0.004 8	0.121 2	0.010 4	0.018 5	0.000 4
18022-21	2.22	87	92	0.892 3	121	2.6	235	274	129	5.9	0.050 9	0.006 6	0.121 4	0.010 0	0.019 0	0.000 4
18022-22	2.01	76	73	0.997 5	117	2.6	1 472	158	157	6.9	0.092 2	0.007 7	0.224 9	0.014 9	0.018 3	0.000 4
18022-23	119.67	45	733	0.057 7	907	7.7	1 161	75	2 480	152.3	0.078 5	0.001 7	1.652 1	0.037 8	0.151 0	0.001 4
18022-24	32.50	243	366	0.638 1	440	4.9	524	63	563	17.4	0.057 9	0.001 7	0.567 5	0.016 5	0.070 6	0.000 8
18022-25	14.63	175	385	0.442 6	208	2.1	272	83	222	7.3	0.051 7	0.001 9	0.234 9	0.008 2	0.032 8	0.000 3
18022-26	3.17	168	129	1.260 8	111	2.2	457	170	113	3.8	0.056 1	0.004 3	0.130 8	0.008 9	0.017 3	0.000 4
18022-27	1.70	62	73	0.839 3	118	2.1	283	236	114	5.5	0.052 0	0.005 4	0.125 8	0.010 8	0.018 4	0.000 3
18022-28	34.70	413	556	0.735 3	307	3.2	833	63	373	8.2	0.066 8	0.002 0	0.450 2	0.012 8	0.048 7	0.000 5
18022-29	30.10	392	533	0.714 5	291	2.9	283	72	292	7.3	0.052 0	0.001 6	0.333 2	0.010 5	0.046 1	0.000 5

测点
18022-01	10.65	726	381	1.769 5	117	1.6	143	126	119	2.6	0.048 9	0.002 6	0.122 9	0.006 4	0.018 3	0.000 2
18022-02	63.30	777	663	1.121 4	448	3.4	465	52	445	6.6	0.056 3	0.001 3	0.562 3	0.013 4	0.072 0	0.000 6
18022-03	39.20	578	1 029	0.517 1	207	1.8	406	69	214	4.9	0.054 8	0.001 6	0.250 0	0.008 0	0.032 7	0.000 3
18022-04	32.90	554	795	0.663 9	212	2.7	809	112	257	10.8	0.066 1	0.003 4	0.315 2	0.019 4	0.033 4	0.000 4
18022-05	1.98	89	85	1.002 4	115	2.9	235	219	117	4.9	0.050 9	0.005 1	0.119 6	0.010 3	0.018 1	0.000 5
18022-06	2.51	135	110	1.176 8	108	2.2	456	186	105	3.6	0.055 9	0.004 8	0.128 0	0.010 0	0.016 8	0.000 3
18022-07	2.32	111	88	1.182 8	113	2.3	1 263	173	133	5.4	0.082 7	0.007 3	0.196 5	0.014 8	0.017 6	0.000 4
18022-08	3.60	217	141	1.470 3	112	1.8	109	224	109	3.2	0.048 2	0.003 4	0.115 1	0.007 7	0.017 5	0.000 3
18022-09	68.90	552	1 157	0.453 7	324	3.8	800	74	365	12.7	0.065 8	0.002 4	0.477 8	0.019 6	0.051 5	0.000 6
18022-10	26.55	377	700	0.511 6	205	2.2	276	76	205	5.0	0.051 8	0.001 7	0.231 1	0.007 4	0.032 2	0.000 3
18022-11	7.29	417	236	1.643 0	116	1.8	1 544	93	139	3.3	0.095 8	0.004 7	0.238 8	0.011 0	0.018 2	0.000 3
18022-12	2.77	133	114	1.112 1	116	2.4	220	227	109	4.0	0.050 5	0.004 2	0.123 3	0.009 9	0.018 1	0.000 4
18022-13	2.88	144	114	1.179 4	112	2.4	833	179	133	9.5	0.066 5	0.005 7	0.160 3	0.013 7	0.017 6	0.000 4
18022-14	2.79	113	116	0.928 7	115	2.4	676	172	125	4.7	0.062 1	0.005 0	0.152 3	0.011 9	0.018 0	0.000 4
18022-15	22.45	318	400	0.778 3	286	3.3	483	96	289	6.7	0.056 8	0.002 5	0.356 9	0.015 4	0.045 4	0.000 5
18022-16	1.72	79	72	1.065 4	116	3.2	733	269	106	4.6	0.061 8	0.007 7	0.141 4	0.015 0	0.018 1	0.000 5
18022-17	2.34	114	92	1.196 5	112	2.4	922	244	126	4.8	0.069 5	0.008 0	0.166 8	0.019 6	0.017 6	0.000 4
18022-18	3.44	166	146	1.030 4	113	2.1	124	193	114	3.7	0.048 5	0.004 2	0.114 7	0.009 1	0.017 6	0.000 3
18022-19	3.60	230	133	1.555 5	111	2.3	483	152	112	3.4	0.056 8	0.003 9	0.134 0	0.008 5	0.017 3	0.000 4
18022-20	2.01	88	84	1.005 7	118	2.7	146	215	117	5.1	0.049 0	0.004 8	0.121 2	0.010 4	0.018 5	0.000 4
18022-21	2.22	87	92	0.892 3	121	2.6	235	274	129	5.9	0.050 9	0.006 6	0.121 4	0.010 0	0.019 0	0.000 4
18022-22	2.01	76	73	0.997 5	117	2.6	1 472	158	157	6.9	0.092 2	0.007 7	0.224 9	0.014 9	0.018 3	0.000 4
18022-23	119.67	45	733	0.057 7	907	7.7	1 161	75	2 480	152.3	0.078 5	0.001 7	1.652 1	0.037 8	0.151 0	0.001 4
18022-24	32.50	243	366	0.638 1	440	4.9	524	63	563	17.4	0.057 9	0.001 7	0.567 5	0.016 5	0.070 6	0.000 8
18022-25	14.63	175	385	0.442 6	208	2.1	272	83	222	7.3	0.051 7	0.001 9	0.234 9	0.008 2	0.032 8	0.000 3
18022-26	3.17	168	129	1.260 8	111	2.2	457	170	113	3.8	0.056 1	0.004 3	0.130 8	0.008 9	0.017 3	0.000 4
18022-27	1.70	62	73	0.839 3	118	2.1	283	236	114	5.5	0.052 0	0.005 4	0.125 8	0.010 8	0.018 4	0.000 3
18022-28	34.70	413	556	0.735 3	307	3.2	833	63	373	8.2	0.066 8	0.002 0	0.450 2	0.012 8	0.048 7	0.000 5
18022-29	30.10	392	533	0.714 5	291	2.9	283	72	292	7.3	0.052 0	0.001 6	0.333 2	0.010 5	0.046 1	0.000 5

测点	²⁰⁶Pb_t/ 10^-6	Th/ 10^-6	U/ 10^-6	²³²Th /²³⁸U	²⁰⁶Pb/²³⁸U 年龄/Ma	1σ	²⁰⁷Pb/²⁰⁶Pb 年龄/Ma	1σ	²⁰⁸Pb/²³²Th 年龄/Ma	1σ	²⁰⁷Pb^/²⁰⁶Pb^ 比值	1σ	²⁰⁷Pb^*/²³⁵U 比值	1σ	²⁰⁶Pb^*/²³⁸U 比值	1σ
17001-2-01	390	327	583	0.549 1	446	7.7	345	106	469	16.1	0.053 2	0.002 5	0.538 4	0.024 0	0.071 6	0.001 3
17001-2-02	509	352	518	0.688 5	195	5.7	2 948	107	575	38.0	0.215 6	0.014 3	0.956 5	0.075 2	0.030 7	0.000 9
17001-2-03	91	304	191	1.617 7	117	3.7	339	264	118	5.0	0.053 2	0.006 3	0.121 2	0.012 2	0.018 3	0.000 6
17001-2-04	104	312	207	1.539 2	121	5.3	306	348	129	8.3	0.052 4	0.009 0	0.129 1	0.016 9	0.019 0	0.000 8
17001-2-05	98	225	271	0.836 7	166	5.1	309	231	166	7.8	0.052 5	0.005 3	0.180 9	0.015 7	0.026 1	0.000 8
17001-2-06	31	40	59	0.676 9	137	7.0	2 595	268	245	30.6	0.173 8	0.027 6	0.388 5	0.050 8	0.021 5	0.001 1
17001-2-07	47	100	84	1.163 6	139	6.3	2 027	293	171	11.3	0.124 9	0.020 5	0.303 5	0.048 0	0.021 7	0.001 0
17001-2-08	55	184	134	1.381 9	113	4.4	295	278	108	6.5	0.052 2	0.007 0	0.117 7	0.013 5	0.017 7	0.000 7
17001-2-09	27	85	68	1.287 6	110	6.6	1 302	478	111	8.1	0.084 4	0.020 2	0.155 0	0.034 8	0.017 2	0.001 0
17001-2-10	40	118	117	1.045 8	109	6.0	33	372	119	9.4	0.046 5	0.008 4	0.112 5	0.018 0	0.017 1	0.000 9
17001-2-11	67	250	167	1.554 8	112	4.6	120	296	96	5.2	0.048 5	0.006 6	0.116 4	0.016 3	0.017 5	0.000 7
17001-2-12	66	204	161	1.268 0	116	5.0	1 133	319	115	5.7	0.074 9	0.011 7	0.173 3	0.023 5	0.018 1	0.000 8
17001-2-13	28	41	51	0.828 4	134	7.8	2 881	281	223	17.3	0.206 8	0.035 3	0.421 5	0.046 5	0.021 0	0.001 2
17001-2-14	42	156	123	1.303 8	119	5.3	433	383	97	6.7	0.055 3	0.011 0	0.126 2	0.022 1	0.018 6	0.000 8
17001-2-15	65	226	161	1.448 2	119	5.1	87	356	109	6.5	0.047 7	0.008 0	0.124 5	0.023 7	0.018 6	0.000 8
17001-2-16	25	85	84	1.049 3	129	6.9	1 524	550	109	7.1	0.094 7	0.026 7	0.134 6	0.033 9	0.020 2	0.001 1
17001-2-17	37	117	106	1.173 9	123	5.2	80	330	115	8.2	0.047 6	0.007 4	0.129 7	0.017 9	0.019 3	0.000 8
17001-2-18	59	211	154	1.429 9	123	5.6	456	361	111	7.5	0.055 9	0.010 5	0.130 0	0.027 9	0.019 2	0.000 9
17001-2-19	44	138	114	1.303 1	122	6.5	972	410	123	8.8	0.071 5	0.014 1	0.155 8	0.026 9	0.019 1	0.001 0
17001-2-20	150	259	432	0.656 4	228	6.9	139	270	217	14.6	0.048 8	0.006 1	0.238 0	0.025 7	0.036 0	0.001 1
17001-2-21	66	234	176	1.411 5	115	4.9	109	341	108	5.6	0.048 2	0.007 7	0.117 8	0.018 2	0.018 0	0.000 8
17001-2-22	29	90	90	1.048 1	115	5.5	1 276	333	126	9.0	0.083 3	0.014 0	0.167 5	0.027 4	0.017 9	0.000 9
17001-2-23	64	193	121	1.650 1	132	5.3	587	425	128	7.4	0.059 5	0.011 4	0.145 1	0.025 9	0.020 7	0.000 8
17001-2-24	57	215	160	1.403 7	120	3.8	189	272	102	5.5	0.049 7	0.006 5	0.132 2	0.014 5	0.018 8	0.000 6
17001-2-25	61	203	136	1.541 3	123	6.0	1 220	349	114	6.7	0.080 9	0.014 1	0.178 8	0.019 0	0.019 3	0.001 0
17001-2-26	70	251	158	1.644 3	107	4.3	1 106	347	107	5.6	0.076 4	0.013 2	0.144 3	0.020 0	0.016 7	0.000 7
17001-2-27	151	519	298	1.736 9	112	3.4	354	233	111	4.9	0.053 6	0.005 5	0.120 0	0.009 6	0.017 6	0.000 5
17001-2-28	131	384	240	1.637 0	120	4.2	1 013	225	130	6.6	0.073 0	0.008 0	0.192 1	0.020 2	0.018 7	0.000 7
17001-2-29	73	245	168	1.499 6	116	4.9	261	381	109	8.0	0.051 5	0.009 6	0.123 8	0.020 0	0.018 2	0.000 8
17001-2-30	67	231	152	1.528 1	110	4.6	467	302	107	7.2	0.054 8	0.010 0	0.111 5	0.014 4	0.017 3	0.000 7
17001-2-31	100	138	123	1.148 4	148	6.2	2 506	239	279	27.9	0.164 9	0.023 2	0.537 0	0.080 4	0.023 2	0.001 0
17001-2-32	40	126	110	1.188 1	114	5.8	280	422	112	9.6	0.051 9	0.010 9	0.121 9	0.034 3	0.017 8	0.000 9
17001-2-33	37	124	90	1.392 7	114	5.7	635	372	104	6.8	0.060 9	0.010 3	0.145 5	0.019 8	0.017 8	0.000 9
17001-2-34	70	149	118	1.256 4	123	4.7	2 106	212	169	10.3	0.130 5	0.015 7	0.314 5	0.034 1	0.019 3	0.000 7
17001-2-35	48	114	100	1.181 6	124	5.9	2 147	272	144	9.0	0.133 7	0.020 5	0.279 7	0.030 9	0.019 4	0.000 9
17001-2-36	36	128	107	1.250 8	112	5.0	367	356	99	8.1	0.053 7	0.009 4	0.122 4	0.021 6	0.017 6	0.000 8
17001-2-37	36	47.5	58	0.845 7	146	7.6	3 033	283	260	16.8	0.227 3	0.039 6	0.538 6	0.048 6	0.022 9	0.001 2
17001-2-38	50	129	101	1.257 3	122	6.1	1 533	313	153	10.6	0.095 3	0.015 6	0.244 0	0.041 0	0.019 0	0.001 0
17001-2-39	68	214	148	1.494 3	118	5.7	322	328	117	6.6	0.052 6	0.008 6	0.119 7	0.014 9	0.018 4	0.000 9

测点	²⁰⁶Pb_t/ 10^-6	Th/ 10^-6	U/ 10^-6	²³²Th /²³⁸U	²⁰⁶Pb/²³⁸U 年龄/Ma	1σ	²⁰⁷Pb/²⁰⁶Pb 年龄/Ma	1σ	²⁰⁸Pb/²³²Th 年龄/Ma	1σ	²⁰⁷Pb^/²⁰⁶Pb^ 比值	1σ	²⁰⁷Pb^*/²³⁵U 比值	1σ	²⁰⁶Pb^*/²³⁸U 比值	1σ
17001-2-01	390	327	583	0.549 1	446	7.7	345	106	469	16.1	0.053 2	0.002 5	0.538 4	0.024 0	0.071 6	0.001 3
17001-2-02	509	352	518	0.688 5	195	5.7	2 948	107	575	38.0	0.215 6	0.014 3	0.956 5	0.075 2	0.030 7	0.000 9
17001-2-03	91	304	191	1.617 7	117	3.7	339	264	118	5.0	0.053 2	0.006 3	0.121 2	0.012 2	0.018 3	0.000 6
17001-2-04	104	312	207	1.539 2	121	5.3	306	348	129	8.3	0.052 4	0.009 0	0.129 1	0.016 9	0.019 0	0.000 8
17001-2-05	98	225	271	0.836 7	166	5.1	309	231	166	7.8	0.052 5	0.005 3	0.180 9	0.015 7	0.026 1	0.000 8
17001-2-06	31	40	59	0.676 9	137	7.0	2 595	268	245	30.6	0.173 8	0.027 6	0.388 5	0.050 8	0.021 5	0.001 1
17001-2-07	47	100	84	1.163 6	139	6.3	2 027	293	171	11.3	0.124 9	0.020 5	0.303 5	0.048 0	0.021 7	0.001 0
17001-2-08	55	184	134	1.381 9	113	4.4	295	278	108	6.5	0.052 2	0.007 0	0.117 7	0.013 5	0.017 7	0.000 7
17001-2-09	27	85	68	1.287 6	110	6.6	1 302	478	111	8.1	0.084 4	0.020 2	0.155 0	0.034 8	0.017 2	0.001 0
17001-2-10	40	118	117	1.045 8	109	6.0	33	372	119	9.4	0.046 5	0.008 4	0.112 5	0.018 0	0.017 1	0.000 9
17001-2-11	67	250	167	1.554 8	112	4.6	120	296	96	5.2	0.048 5	0.006 6	0.116 4	0.016 3	0.017 5	0.000 7
17001-2-12	66	204	161	1.268 0	116	5.0	1 133	319	115	5.7	0.074 9	0.011 7	0.173 3	0.023 5	0.018 1	0.000 8
17001-2-13	28	41	51	0.828 4	134	7.8	2 881	281	223	17.3	0.206 8	0.035 3	0.421 5	0.046 5	0.021 0	0.001 2
17001-2-14	42	156	123	1.303 8	119	5.3	433	383	97	6.7	0.055 3	0.011 0	0.126 2	0.022 1	0.018 6	0.000 8
17001-2-15	65	226	161	1.448 2	119	5.1	87	356	109	6.5	0.047 7	0.008 0	0.124 5	0.023 7	0.018 6	0.000 8
17001-2-16	25	85	84	1.049 3	129	6.9	1 524	550	109	7.1	0.094 7	0.026 7	0.134 6	0.033 9	0.020 2	0.001 1
17001-2-17	37	117	106	1.173 9	123	5.2	80	330	115	8.2	0.047 6	0.007 4	0.129 7	0.017 9	0.019 3	0.000 8
17001-2-18	59	211	154	1.429 9	123	5.6	456	361	111	7.5	0.055 9	0.010 5	0.130 0	0.027 9	0.019 2	0.000 9
17001-2-19	44	138	114	1.303 1	122	6.5	972	410	123	8.8	0.071 5	0.014 1	0.155 8	0.026 9	0.019 1	0.001 0
17001-2-20	150	259	432	0.656 4	228	6.9	139	270	217	14.6	0.048 8	0.006 1	0.238 0	0.025 7	0.036 0	0.001 1
17001-2-21	66	234	176	1.411 5	115	4.9	109	341	108	5.6	0.048 2	0.007 7	0.117 8	0.018 2	0.018 0	0.000 8
17001-2-22	29	90	90	1.048 1	115	5.5	1 276	333	126	9.0	0.083 3	0.014 0	0.167 5	0.027 4	0.017 9	0.000 9
17001-2-23	64	193	121	1.650 1	132	5.3	587	425	128	7.4	0.059 5	0.011 4	0.145 1	0.025 9	0.020 7	0.000 8
17001-2-24	57	215	160	1.403 7	120	3.8	189	272	102	5.5	0.049 7	0.006 5	0.132 2	0.014 5	0.018 8	0.000 6
17001-2-25	61	203	136	1.541 3	123	6.0	1 220	349	114	6.7	0.080 9	0.014 1	0.178 8	0.019 0	0.019 3	0.001 0
17001-2-26	70	251	158	1.644 3	107	4.3	1 106	347	107	5.6	0.076 4	0.013 2	0.144 3	0.020 0	0.016 7	0.000 7
17001-2-27	151	519	298	1.736 9	112	3.4	354	233	111	4.9	0.053 6	0.005 5	0.120 0	0.009 6	0.017 6	0.000 5
17001-2-28	131	384	240	1.637 0	120	4.2	1 013	225	130	6.6	0.073 0	0.008 0	0.192 1	0.020 2	0.018 7	0.000 7
17001-2-29	73	245	168	1.499 6	116	4.9	261	381	109	8.0	0.051 5	0.009 6	0.123 8	0.020 0	0.018 2	0.000 8
17001-2-30	67	231	152	1.528 1	110	4.6	467	302	107	7.2	0.054 8	0.010 0	0.111 5	0.014 4	0.017 3	0.000 7
17001-2-31	100	138	123	1.148 4	148	6.2	2 506	239	279	27.9	0.164 9	0.023 2	0.537 0	0.080 4	0.023 2	0.001 0
17001-2-32	40	126	110	1.188 1	114	5.8	280	422	112	9.6	0.051 9	0.010 9	0.121 9	0.034 3	0.017 8	0.000 9
17001-2-33	37	124	90	1.392 7	114	5.7	635	372	104	6.8	0.060 9	0.010 3	0.145 5	0.019 8	0.017 8	0.000 9
17001-2-34	70	149	118	1.256 4	123	4.7	2 106	212	169	10.3	0.130 5	0.015 7	0.314 5	0.034 1	0.019 3	0.000 7
17001-2-35	48	114	100	1.181 6	124	5.9	2 147	272	144	9.0	0.133 7	0.020 5	0.279 7	0.030 9	0.019 4	0.000 9
17001-2-36	36	128	107	1.250 8	112	5.0	367	356	99	8.1	0.053 7	0.009 4	0.122 4	0.021 6	0.017 6	0.000 8
17001-2-37	36	47.5	58	0.845 7	146	7.6	3 033	283	260	16.8	0.227 3	0.039 6	0.538 6	0.048 6	0.022 9	0.001 2
17001-2-38	50	129	101	1.257 3	122	6.1	1 533	313	153	10.6	0.095 3	0.015 6	0.244 0	0.041 0	0.019 0	0.001 0
17001-2-39	68	214	148	1.494 3	118	5.7	322	328	117	6.6	0.052 6	0.008 6	0.119 7	0.014 9	0.018 4	0.000 9

岩石	样号	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	H₂O⁺	H₂O^-	烧失量	总量	A/CNK	σ	DI	Na₂O/K₂O
闪长玢岩	17010-1	53.92	1.04	16.13	1.48	4.34	0.14	1.80	5.34	1.66	4.99	0.51	1.58	0.58	8.06	99.42	0.90	4.05	58.90	0.33
闪长玢岩	17001-2	58.36	0.92	16.08	1.98	3.51	0.23	1.73	4.30	0.40	3.63	0.39	3.32	0.60	8.26	99.78	1.29	1.06	59.49	0.11
闪长玢岩	18003-5	50.70	1.16	17.45	1.92	4.84	0.30	2.44	4.31	0.08	4.28	0.42	3.20	0.26	10.96	98.87	1.38	2.47	51.51	0.02
闪长玢岩	19003-2	60.78	1.41	16.94	2.20	5.16	0.07	1.87	1.05	0.13	4.44	0.72	0.94	0.39	4.22	98.98	2.44	1.17	68.25	0.03
二长闪长玢岩	18006-5	51.56	1.15	16.44	2.50	4.44	0.13	2.70	6.03	3.00	3.80	0.59	1.26	0.75	7.34	99.68	0.82	5.40	55.56	0.79
二长闪长玢岩	17003-2	48.00	1.03	18.01	2.00	5.11	0.11	3.49	6.95	3.00	3.22	0.49	3.00	0.08	8.08	99.49	0.85	7.74	48.64	0.93
辉长闪长玢岩	19003-6	49.60	1.42	16.43	2.19	5.77	0.21	2.78	4.50	0.05	5.10	0.72	1.98	0.49	10.02	98.79	1.19	4.02	51.00	0.01
辉长闪长玢岩	17011-4	49.64	1.61	18.73	2.06	6.38	0.13	4.01	3.86	0.34	4.68	0.80	3.86	0.96	6.88	99.12	1.48	3.80	48.34	0.07
安粗岩	18022	56.92	1.15	16.59	6.46	4.07	0.13	1.66	5.35	4.01	3.05	0.43	1.80	0.60	3.82	103.64	0.84	3.58	60.22	1.31
安山岩	18017-5	56.00	0.69	15.70	1.07	5.28	0.30	2.95	5.08	2.44	2.79	0.15	3.10	0.51	7.08	99.53	0.96	2.10	53.81	0.87
安山岩	18007-1	58.80	0.74	14.44	1.01	5.44	0.22	2.86	5.22	2.58	2.35	0.17	2.22	0.28	5.02	98.86	0.89	1.54	56.02	1.10
安山岩	17012-1	60.16	0.62	13.92	3.36	2.54	0.45	2.00	6.31	2.26	2.20	0.13	2.82	0.54	6.18	100.13	0.79	1.16	58.33	1.03
英安岩	18006-1	61.60	0.84	13.57	1.98	4.20	0.25	2.18	4.49	1.61	1.69	0.30	2.88	0.49	6.52	99.23	1.07	0.59	59.23	0.95