桂东南莲垌和古龙岩体加里东期I型花岗岩类的岩石成因及构造意义

doi:10.13745/j.esf.sf.2023.2.62

地学前缘 ›› 2024, Vol. 31 ›› Issue (2): 224-248.DOI: 10.13745/j.esf.sf.2023.2.62

桂东南莲垌和古龙岩体加里东期I型花岗岩类的岩石成因及构造意义

周予茜¹^,²(), 时毓¹^,²^,^*(), 黄椿文³, 刘希军¹^,², 蓝媛春¹^,², 唐源远¹^,², 翁伯寅¹^,²

1.桂林理工大学广西隐伏金属矿产勘查重点实验室, 广西桂林 541004
2.桂林理工大学有色金属矿产勘查与资源高效利用省部共建协同创新中心, 广西桂林 541004
3.贺州科技信息网络中心, 广西贺州 542800

收稿日期:2022-08-29 修回日期:2023-01-26 出版日期:2024-03-25 发布日期:2024-04-18
通讯作者: *时毓(1980—),女,博士,教授,主要从事岩石学、岩石地球化学研究工作。E-mail: shiyu_61@163.com
作者简介:周予茜(1999—),女,硕士研究生,地质学专业。E-mail: Zhouyuxi0724@outlook.com
基金资助:
广西自然科学基金杰出青年基金项目“华南显生宙构造演化”(2019GXNSFFA245005);国家自然科学基金项目“扬子克拉通古元古代地壳演化:来自崆岭孔兹岩系的证据”(42372083)

Petrogenesis and tectonic significance of Caledonian I-Type granitoids in the Gulong and Liandong plutons in southeastern Guangxi

ZHOU Yuxi¹^,²(), SHI Yu¹^,²^,^*(), HUANG Chunwen³, LIU Xijun¹^,², LAN Yuanchun¹^,², TANG Yuanyuan¹^,², WENG Boyin¹^,²

1. Guangxi Key Laboratory of Hidden Metal Mineral Exploration, Guilin University of Technology, Guilin 541004, China
2. Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources in Guangxi, Guilin University of Technology, Guilin 541004, China
3. Hezhou Information Network Center of Science and Technology, Hezhou 542800, China

Received:2022-08-29 Revised:2023-01-26 Online:2024-03-25 Published:2024-04-18

摘要/Abstract

摘要：

早古生代加里东造山运动使整个华南板块产生了广泛的岩浆活动,而关于华南早古生代的构造属性是俯冲-碰撞还是陆内造山尚存争议。对钦杭结合带的I型花岗岩成因研究对揭示桂东南地区早古生代地球动力学背景及其构造演化具有重要的地质意义。本文对桂东/南莲垌和古龙岩体中的花岗岩样品进行了全岩地球化学分析、LA-ICP-MS锆石U-Pb定年和Lu-Hf同位素分析。莲垌和古龙岩体花岗岩的形成时代相近,分别为435~434和436~435 Ma。莲垌和古龙岩体均为花岗闪长岩,并具有相似的地球化学特征:10 000Ga/Al值为2.07,w(Zr+Nb+Ce+Y)值为183×10^-6,A/CNK为0.87~1.1,平均值为0.97,ε_Hf(t)值为-2.2~1.8,主要集中在0~2,对应的T_DM2年龄主要分布在1.6~1.2 Ga,峰值在1.5~1.3 Ga,Nb/Ta值为11.47~14.66,平均值为12.80,Rb/Sr值为0.22~0.52。以上分析结果表明:莲垌和古龙岩体均为钙碱性I型花岗岩,来源于中元古代基底变质火成岩的部分熔融,并可能含一定的幔源物质。其主要形成过程为:华南板块南部与冈瓦纳北缘大规模碰撞所产生的应力,自南向北、自东向西传入华南板块,引发华南板块陆内造山作用。加厚的岩石圈经历了造山后伸展-减薄,地幔物质上涌为下地壳部分熔融提供了热量,形成新生地壳熔融型(如古龙岩体)或新生地壳与古老地壳混合熔融型(如莲垌岩体)的母岩浆;在陆内造山作用期后的伸展环境下,母岩浆沿通道上涌,形成了具有俯冲-碰撞特征的I型花岗岩。

关键词: 加里东期, 花岗岩类, 地球化学, 锆石U-Pb年代学, 锆石Lu-Hf同位素, 桂东南

Abstract:

The Early Paleozoic Caledonian orogeny caused extensive magmatic activities in the South China Block (SCB), but its tectonic attribute is still controversial over weather it was subduction collisional or intracontinental. Study on the petrogenesis of I-type granites in the Qin-Hang junction zone is of great geological significance to reveal the Early Paleozoic geodynamic background and tectonic evolution in southeastern Guangxi. In this study, whole-rock geochemical analysis, LA-ICP-MS zircon U-Pb dating and Lu-Hf isotope analysis of granite samples from the Liandong and Gulong plutons in southeastern Guangxi are carried out. The two plutons are granodioites with similar formation ages, at 435-434 and 436-435 Ma, respectively, and with similar geochemical characteristics (10000Ga/Al value of 2.07; (Zr+Nb+Ce+Y) content of 183×10^-6; A/CNK ratio of 0.87-1.1, averaging 0.97; ε_Hf(t) value of -2.2-1.8, mostly between 0-2; T_DM2 age of 1.6-1.2 Ga, with a peak at 1.5-1.3 Ga; Nb/Ta ratio of 11.47-14.66, averaging 12.80; Rb/Sr ratio of 0.22-0.52), indicating both are calc-alkaline I-type granite originated from the partial melting of Mesoproterozoic meta-igneous rocks, probably containing some mantle-derived materials. A pluton formation model is proposed as follows: Large-scale collision between the southern SCB and the northern Gondwana margin created S-N and E-W stresses to the SCB triggering intracontinental orogeny. The thickened lithosphere underwent post-orogenic extension and thinning, and upwelling of mantle materials provided heat for the partial melting of the lower crust, forming the parental magma of the melting-type newborn crust (e.g. the Gulong pluton) or the mixed melting-type newborn crust with ancient crust component (e.g. the Liandong pluton). Under extensional environment after the intracontinental orogenic period, the parental magma upwelling along the channel formed the I-type granite with subduction-collision characteristics.

Key words: Caledonian, granitoids, geochemistry, zircon U-Pb dating, zircon Lu-Hf isotopes, southeastern Guangxi

中图分类号:

周予茜, 时毓, 黄椿文, 刘希军, 蓝媛春, 唐源远, 翁伯寅. 桂东南莲垌和古龙岩体加里东期I型花岗岩类的岩石成因及构造意义[J]. 地学前缘, 2024, 31(2): 224-248.

ZHOU Yuxi, SHI Yu, HUANG Chunwen, LIU Xijun, LAN Yuanchun, TANG Yuanyuan, WENG Boyin. Petrogenesis and tectonic significance of Caledonian I-Type granitoids in the Gulong and Liandong plutons in southeastern Guangxi[J]. Earth Science Frontiers, 2024, 31(2): 224-248.

图/表 16

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分析点号	年龄/Ma	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	2σ	(¹⁷⁶Hf/¹⁷⁷Hf)_i	ε_Hf(t)	2σ	T_DM1/Ga	T_DM2/Ga
花岗闪长岩(DA17-20-01)
-1	434	0.048 322	0.001 683	0.282 518	0.000 014	0.282 504	-0.3	0.49	1.06	1.42
-2	434	0.068 206	0.002 328	0.282 537	0.000 013	0.282 518	0.2	0.46	1.05	1.39
-4	434	0.041 291	0.001 401	0.282 566	0.000 012	0.282 555	1.5	0.42	0.98	1.31
-5	434	0.040 169	0.001 472	0.282 564	0.000 015	0.282 552	1.4	0.53	0.99	1.31
-7	434	0.043 257	0.001 460	0.282 488	0.000 015	0.282 476	-1.3	0.53	1.09	1.48
-8	434	0.039 652	0.001 274	0.282 542	0.000 012	0.282 532	0.7	0.42	1.01	1.36
-9	434	0.057 273	0.001 941	0.282 563	0.000 015	0.282 547	1.3	0.53	1.00	1.32
-10	434	0.045 196	0.001 509	0.282 485	0.000 014	0.282 473	-1.4	0.49	1.10	1.49
-11	434	0.062 221	0.002 047	0.282 546	0.000 015	0.282 529	0.6	0.53	1.03	1.36
-12	434	0.057 816	0.001 912	0.282 501	0.000 016	0.282 485	-0.9	0.56	1.09	1.46
-13	434	0.036 072	0.001 199	0.282 502	0.000 012	0.282 492	-0.7	0.42	1.07	1.45
-14	434	0.055 552	0.001 774	0.282 531	0.000 013	0.282 517	0.2	0.46	1.04	1.39
-15	434	0.047 163	0.001 526	0.282 511	0.000 012	0.282 499	-0.5	0.42	1.06	1.43
-16	434	0.042 522	0.001 350	0.282 461	0.000 017	0.282 450	-2.2	0.60	1.13	1.54
-17	434	0.038 013	0.001 264	0.282 470	0.000 013	0.282 460	-1.8	0.46	1.11	1.52
-18	434	0.053 658	0.001 787	0.282 525	0.000 015	0.282 510	0.0	0.53	1.05	1.41
-20	434	0.068 526	0.002 240	0.282 500	0.000 016	0.282 482	-1.1	0.56	1.10	1.47
-21	434	0.055 453	0.001 830	0.282 532	0.000 013	0.282 517	0.2	0.46	1.04	1.39
-22	434	0.045 566	0.001 538	0.282 520	0.000 016	0.282 507	-0.1	0.56	1.05	1.41
-23	434	0.040 642	0.001 385	0.282 573	0.000 016	0.282 562	1.8	0.56	0.97	1.29
花岗闪长岩(LT17-21-01)
-1	435	0.042 688	0.001 306	0.282 514	0.000 013	0.282 503	-0.3	0.46	1.05	1.42
-2	435	0.043 236	0.001 352	0.282 525	0.000 012	0.282 514	0.1	0.42	1.04	1.40
-3	435	0.041 320	0.001 267	0.282 491	0.000 012	0.282 481	-1.1	0.42	1.08	1.47
-4	435	0.088 507	0.002 637	0.282 552	0.000 013	0.282 530	0.7	0.46	1.04	1.36
-5	435	0.052 366	0.001 524	0.282 513	0.000 013	0.282 501	-0.4	0.46	1.06	1.43
-6	435	0.063 763	0.001 712	0.282 495	0.000 013	0.282 481	-1.1	0.46	1.09	1.47
-7	435	0.079 017	0.002 128	0.282 505	0.000 015	0.282 488	-0.8	0.53	1.09	1.46
-8	435	0.054 059	0.001 511	0.282 528	0.000 015	0.282 516	0.2	0.53	1.04	1.39
-9	435	0.064 454	0.001 759	0.282 531	0.000 015	0.282 517	0.2	0.53	1.04	1.39
-10	435	0.038 326	0.001 153	0.282 505	0.000 011	0.282 496	-0.5	0.39	1.06	1.44
-11	435	0.054 614	0.001 913	0.282 531	0.000 012	0.282 515	0.2	0.42	1.05	1.39
-12	435	0.047 331	0.001 388	0.282 566	0.000 015	0.282 555	1.5	0.53	0.98	1.30
-13	435	0.053 182	0.001 555	0.282 553	0.000 013	0.282 540	1.0	0.46	1.00	1.34
-14	435	0.059 734	0.001 714	0.282 556	0.000 013	0.282 542	1.1	0.46	1.00	1.33
-15	435	0.074 568	0.002 166	0.282 512	0.000 013	0.282 494	-0.6	0.46	1.08	1.44
-16	435	0.056 951	0.001 669	0.282 561	0.000 012	0.282 547	1.3	0.42	1.00	1.32
-17	435	0.064 570	0.001 872	0.282 498	0.000 012	0.282 483	-1.0	0.42	1.09	1.47
-18	435	0.064 517	0.001 912	0.282 559	0.000 013	0.282 543	1.1	0.46	1.00	1.33
-19	435	0.079 959	0.002 272	0.282 562	0.000 013	0.282 543	1.1	0.46	1.01	1.33
-20	435	0.065 986	0.001 934	0.282 559	0.000 012	0.282 543	1.1	0.42	1.01	1.33
花岗闪长岩(LT17-21-02)
-1	435	0.046 469	0.001 532	0.282 526	0.000 015	0.282 514	0.1	0.53	1.04	1.40
-2	435	0.045 441	0.001 361	0.282 515	0.000 013	0.282 504	-0.3	0.46	1.05	1.42
-3	435	0.074 649	0.002 137	0.282 530	0.000 016	0.282 513	0.1	0.56	1.05	1.40
-4	435	0.082 675	0.002 402	0.282 548	0.000 016	0.282 528	0.6	0.56	1.03	1.36
-5	435	0.064 485	0.001 840	0.282 493	0.000 015	0.282 478	-1.2	0.53	1.10	1.48
-6	435	0.055 891	0.001 543	0.282 524	0.000 015	0.282 511	0.0	0.53	1.04	1.40
-7	435	0.057 361	0.001 632	0.282 493	0.000 013	0.282 480	-1.1	0.46	1.09	1.47
-8	435	0.057 325	0.001 688	0.282 573	0.000 016	0.282 559	1.7	0.56	0.98	1.29
-9	435	0.061 939	0.001 756	0.282 505	0.000 015	0.282 491	-0.7	0.53	1.08	1.45
-10	435	0.047 970	0.001 388	0.282 524	0.000 015	0.282 513	0.1	0.53	1.04	1.40
-11	435	0.077 880	0.002 244	0.282 500	0.000 014	0.282 482	-1.0	0.49	1.10	1.47
-12	435	0.052 166	0.001 521	0.282 461	0.000 013	0.282 449	-2.2	0.46	1.13	1.54
-13	435	0.063 655	0.001 809	0.282 528	0.000 013	0.282 513	0.1	0.46	1.05	1.40
-14	435	0.058 524	0.001 710	0.282 506	0.000 013	0.282 492	-0.7	0.46	1.08	1.45
-15	435	0.052 156	0.001 537	0.282 534	0.000 011	0.282 521	0.4	0.39	1.03	1.38
-17	435	0.055 104	0.001 564	0.282 490	0.000 014	0.282 477	-1.2	0.49	1.09	1.48
-18	435	0.054 424	0.001 590	0.282 502	0.000 012	0.282 489	-0.8	0.42	1.08	1.45
-19	435	0.045 147	0.001 297	0.282 505	0.000 012	0.282 494	-0.6	0.42	1.06	1.44
花岗闪长岩(YJC17-12-1)
-1	435	0.036 837	0.001 211	0.282 554	0.000 010	0.282 544	1.2	0.35	0.99	1.33
-2	435	0.021 225	0.000 705	0.282 535	0.000 009	0.282 529	0.6	0.32	1.01	1.36
-3	435	0.030 770	0.000 996	0.282 540	0.000 010	0.282 532	0.7	0.35	1.01	1.36
-4	435	0.038 809	0.001 261	0.282 542	0.000 011	0.282 532	0.7	0.39	1.01	1.36
-5	435	0.052 364	0.001 629	0.282 548	0.000 011	0.282 535	0.8	0.39	1.01	1.35
-6	435	0.038 390	0.001 238	0.282 544	0.000 010	0.282 534	0.8	0.35	1.01	1.35
-7	435	0.038 677	0.001 169	0.282 545	0.000 009	0.282 535	0.9	0.32	1.00	1.35
-8	435	0.040 591	0.001 270	0.282 538	0.000 010	0.282 528	0.6	0.35	1.02	1.37
-9	435	0.028 593	0.000 889	0.282 568	0.000 011	0.282 561	1.8	0.39	0.97	1.29
-10	435	0.033 762	0.001 036	0.282 568	0.000 010	0.282 560	1.7	0.35	0.97	1.29
-12	435	0.059 350	0.001 815	0.282 560	0.000 011	0.282 545	1.2	0.39	1.00	1.33
-13	435	0.035 871	0.001 102	0.282 568	0.000 010	0.282 559	1.7	0.35	0.97	1.30
-14	435	0.029 178	0.000 905	0.282 548	0.000 011	0.282 541	1.0	0.39	0.99	1.34
-15	435	0.031 322	0.001 005	0.282 527	0.000 010	0.282 519	0.3	0.35	1.03	1.39
-16	435	0.039 875	0.001 236	0.282 561	0.000 010	0.282 551	1.4	0.35	0.98	1.31
-17	435	0.042 099	0.001 306	0.282 556	0.000 010	0.282 545	1.2	0.35	0.99	1.33
花岗闪长岩(TP17-13-1)
-1	436	0.050 106	0.001 466	0.282 558	0.000 013	0.282 546	1.3	0.46	0.99	1.32
-2	436	0.036 115	0.001 078	0.282 548	0.000 010	0.282 539	1.0	0.35	1.00	1.34
-3	436	0.044 681	0.001 293	0.282 527	0.000 011	0.282 516	0.2	0.39	1.03	1.39
-4	436	0.032 131	0.000 935	0.282 554	0.000 011	0.282 546	1.3	0.39	0.99	1.32
-5	436	0.042 789	0.001 205	0.282 574	0.000 010	0.282 564	1.9	0.35	0.96	1.28
-6	436	0.054 387	0.001 529	0.282 554	0.000 011	0.282 542	1.1	0.39	1.00	1.33
-7	436	0.056 447	0.001 616	0.282 560	0.000 012	0.282 547	1.3	0.42	1.00	1.32
-8	436	0.042 209	0.001 205	0.282 603	0.000 011	0.282 593	2.9	0.39	0.92	1.22
-9	436	0.044 070	0.001 287	0.282 560	0.000 011	0.282 549	1.4	0.39	0.99	1.32
-10	436	0.044 171	0.001 279	0.282 546	0.000 010	0.282 536	0.9	0.35	1.01	1.35
-11	436	0.051 934	0.001 471	0.282 570	0.000 012	0.282 558	1.7	0.42	0.98	1.30
-12	436	0.041 025	0.001 180	0.282 567	0.000 012	0.282 557	1.7	0.42	0.97	1.30
-13	436	0.031 616	0.000 924	0.282 551	0.000 011	0.282 543	1.2	0.39	0.99	1.33
-14	436	0.060 554	0.001 735	0.282 589	0.000 012	0.282 575	2.3	0.42	0.96	1.26
-15	436	0.040 021	0.001 168	0.282 580	0.000 011	0.282 570	2.1	0.39	0.96	1.27
-16	436	0.052 418	0.001 514	0.282 578	0.000 010	0.282 566	2.0	0.35	0.97	1.28
-17	436	0.027 182	0.000 801	0.282 578	0.000 011	0.282 571	2.2	0.39	0.95	1.27
-18	436	0.038 163	0.001 123	0.282 571	0.000 011	0.282 562	1.8	0.39	0.97	1.29
-19	436	0.035 878	0.001 071	0.282 558	0.000 012	0.282 549	1.4	0.42	0.98	1.32
-20	436	0.045 109	0.001 316	0.282 562	0.000 012	0.282 551	1.4	0.42	0.98	1.31
-21	436	0.032 101	0.000 951	0.282 580	0.000 011	0.282 572	2.2	0.39	0.95	1.26
-22	436	0.030 691	0.000 913	0.282 549	0.000 010	0.282 542	1.1	0.35	0.99	1.33
-23	436	0.053 181	0.001 508	0.282 544	0.000 011	0.282 532	0.8	0.39	1.02	1.36
-24	436	0.054 339	0.001 484	0.282 579	0.000 011	0.282 567	2.0	0.39	0.96	1.28

分析点号	年龄/Ma	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	2σ	(¹⁷⁶Hf/¹⁷⁷Hf)_i	ε_Hf(t)	2σ	T_DM1/Ga	T_DM2/Ga
花岗闪长岩(DA17-20-01)
-1	434	0.048 322	0.001 683	0.282 518	0.000 014	0.282 504	-0.3	0.49	1.06	1.42
-2	434	0.068 206	0.002 328	0.282 537	0.000 013	0.282 518	0.2	0.46	1.05	1.39
-4	434	0.041 291	0.001 401	0.282 566	0.000 012	0.282 555	1.5	0.42	0.98	1.31
-5	434	0.040 169	0.001 472	0.282 564	0.000 015	0.282 552	1.4	0.53	0.99	1.31
-7	434	0.043 257	0.001 460	0.282 488	0.000 015	0.282 476	-1.3	0.53	1.09	1.48
-8	434	0.039 652	0.001 274	0.282 542	0.000 012	0.282 532	0.7	0.42	1.01	1.36
-9	434	0.057 273	0.001 941	0.282 563	0.000 015	0.282 547	1.3	0.53	1.00	1.32
-10	434	0.045 196	0.001 509	0.282 485	0.000 014	0.282 473	-1.4	0.49	1.10	1.49
-11	434	0.062 221	0.002 047	0.282 546	0.000 015	0.282 529	0.6	0.53	1.03	1.36
-12	434	0.057 816	0.001 912	0.282 501	0.000 016	0.282 485	-0.9	0.56	1.09	1.46
-13	434	0.036 072	0.001 199	0.282 502	0.000 012	0.282 492	-0.7	0.42	1.07	1.45
-14	434	0.055 552	0.001 774	0.282 531	0.000 013	0.282 517	0.2	0.46	1.04	1.39
-15	434	0.047 163	0.001 526	0.282 511	0.000 012	0.282 499	-0.5	0.42	1.06	1.43
-16	434	0.042 522	0.001 350	0.282 461	0.000 017	0.282 450	-2.2	0.60	1.13	1.54
-17	434	0.038 013	0.001 264	0.282 470	0.000 013	0.282 460	-1.8	0.46	1.11	1.52
-18	434	0.053 658	0.001 787	0.282 525	0.000 015	0.282 510	0.0	0.53	1.05	1.41
-20	434	0.068 526	0.002 240	0.282 500	0.000 016	0.282 482	-1.1	0.56	1.10	1.47
-21	434	0.055 453	0.001 830	0.282 532	0.000 013	0.282 517	0.2	0.46	1.04	1.39
-22	434	0.045 566	0.001 538	0.282 520	0.000 016	0.282 507	-0.1	0.56	1.05	1.41
-23	434	0.040 642	0.001 385	0.282 573	0.000 016	0.282 562	1.8	0.56	0.97	1.29
花岗闪长岩(LT17-21-01)
-1	435	0.042 688	0.001 306	0.282 514	0.000 013	0.282 503	-0.3	0.46	1.05	1.42
-2	435	0.043 236	0.001 352	0.282 525	0.000 012	0.282 514	0.1	0.42	1.04	1.40
-3	435	0.041 320	0.001 267	0.282 491	0.000 012	0.282 481	-1.1	0.42	1.08	1.47
-4	435	0.088 507	0.002 637	0.282 552	0.000 013	0.282 530	0.7	0.46	1.04	1.36
-5	435	0.052 366	0.001 524	0.282 513	0.000 013	0.282 501	-0.4	0.46	1.06	1.43
-6	435	0.063 763	0.001 712	0.282 495	0.000 013	0.282 481	-1.1	0.46	1.09	1.47
-7	435	0.079 017	0.002 128	0.282 505	0.000 015	0.282 488	-0.8	0.53	1.09	1.46
-8	435	0.054 059	0.001 511	0.282 528	0.000 015	0.282 516	0.2	0.53	1.04	1.39
-9	435	0.064 454	0.001 759	0.282 531	0.000 015	0.282 517	0.2	0.53	1.04	1.39
-10	435	0.038 326	0.001 153	0.282 505	0.000 011	0.282 496	-0.5	0.39	1.06	1.44
-11	435	0.054 614	0.001 913	0.282 531	0.000 012	0.282 515	0.2	0.42	1.05	1.39
-12	435	0.047 331	0.001 388	0.282 566	0.000 015	0.282 555	1.5	0.53	0.98	1.30
-13	435	0.053 182	0.001 555	0.282 553	0.000 013	0.282 540	1.0	0.46	1.00	1.34
-14	435	0.059 734	0.001 714	0.282 556	0.000 013	0.282 542	1.1	0.46	1.00	1.33
-15	435	0.074 568	0.002 166	0.282 512	0.000 013	0.282 494	-0.6	0.46	1.08	1.44
-16	435	0.056 951	0.001 669	0.282 561	0.000 012	0.282 547	1.3	0.42	1.00	1.32
-17	435	0.064 570	0.001 872	0.282 498	0.000 012	0.282 483	-1.0	0.42	1.09	1.47
-18	435	0.064 517	0.001 912	0.282 559	0.000 013	0.282 543	1.1	0.46	1.00	1.33
-19	435	0.079 959	0.002 272	0.282 562	0.000 013	0.282 543	1.1	0.46	1.01	1.33
-20	435	0.065 986	0.001 934	0.282 559	0.000 012	0.282 543	1.1	0.42	1.01	1.33
花岗闪长岩(LT17-21-02)
-1	435	0.046 469	0.001 532	0.282 526	0.000 015	0.282 514	0.1	0.53	1.04	1.40
-2	435	0.045 441	0.001 361	0.282 515	0.000 013	0.282 504	-0.3	0.46	1.05	1.42
-3	435	0.074 649	0.002 137	0.282 530	0.000 016	0.282 513	0.1	0.56	1.05	1.40
-4	435	0.082 675	0.002 402	0.282 548	0.000 016	0.282 528	0.6	0.56	1.03	1.36
-5	435	0.064 485	0.001 840	0.282 493	0.000 015	0.282 478	-1.2	0.53	1.10	1.48
-6	435	0.055 891	0.001 543	0.282 524	0.000 015	0.282 511	0.0	0.53	1.04	1.40
-7	435	0.057 361	0.001 632	0.282 493	0.000 013	0.282 480	-1.1	0.46	1.09	1.47
-8	435	0.057 325	0.001 688	0.282 573	0.000 016	0.282 559	1.7	0.56	0.98	1.29
-9	435	0.061 939	0.001 756	0.282 505	0.000 015	0.282 491	-0.7	0.53	1.08	1.45
-10	435	0.047 970	0.001 388	0.282 524	0.000 015	0.282 513	0.1	0.53	1.04	1.40
-11	435	0.077 880	0.002 244	0.282 500	0.000 014	0.282 482	-1.0	0.49	1.10	1.47
-12	435	0.052 166	0.001 521	0.282 461	0.000 013	0.282 449	-2.2	0.46	1.13	1.54
-13	435	0.063 655	0.001 809	0.282 528	0.000 013	0.282 513	0.1	0.46	1.05	1.40
-14	435	0.058 524	0.001 710	0.282 506	0.000 013	0.282 492	-0.7	0.46	1.08	1.45
-15	435	0.052 156	0.001 537	0.282 534	0.000 011	0.282 521	0.4	0.39	1.03	1.38
-17	435	0.055 104	0.001 564	0.282 490	0.000 014	0.282 477	-1.2	0.49	1.09	1.48
-18	435	0.054 424	0.001 590	0.282 502	0.000 012	0.282 489	-0.8	0.42	1.08	1.45
-19	435	0.045 147	0.001 297	0.282 505	0.000 012	0.282 494	-0.6	0.42	1.06	1.44
花岗闪长岩(YJC17-12-1)
-1	435	0.036 837	0.001 211	0.282 554	0.000 010	0.282 544	1.2	0.35	0.99	1.33
-2	435	0.021 225	0.000 705	0.282 535	0.000 009	0.282 529	0.6	0.32	1.01	1.36
-3	435	0.030 770	0.000 996	0.282 540	0.000 010	0.282 532	0.7	0.35	1.01	1.36
-4	435	0.038 809	0.001 261	0.282 542	0.000 011	0.282 532	0.7	0.39	1.01	1.36
-5	435	0.052 364	0.001 629	0.282 548	0.000 011	0.282 535	0.8	0.39	1.01	1.35
-6	435	0.038 390	0.001 238	0.282 544	0.000 010	0.282 534	0.8	0.35	1.01	1.35
-7	435	0.038 677	0.001 169	0.282 545	0.000 009	0.282 535	0.9	0.32	1.00	1.35
-8	435	0.040 591	0.001 270	0.282 538	0.000 010	0.282 528	0.6	0.35	1.02	1.37
-9	435	0.028 593	0.000 889	0.282 568	0.000 011	0.282 561	1.8	0.39	0.97	1.29
-10	435	0.033 762	0.001 036	0.282 568	0.000 010	0.282 560	1.7	0.35	0.97	1.29
-12	435	0.059 350	0.001 815	0.282 560	0.000 011	0.282 545	1.2	0.39	1.00	1.33
-13	435	0.035 871	0.001 102	0.282 568	0.000 010	0.282 559	1.7	0.35	0.97	1.30
-14	435	0.029 178	0.000 905	0.282 548	0.000 011	0.282 541	1.0	0.39	0.99	1.34
-15	435	0.031 322	0.001 005	0.282 527	0.000 010	0.282 519	0.3	0.35	1.03	1.39
-16	435	0.039 875	0.001 236	0.282 561	0.000 010	0.282 551	1.4	0.35	0.98	1.31
-17	435	0.042 099	0.001 306	0.282 556	0.000 010	0.282 545	1.2	0.35	0.99	1.33
花岗闪长岩(TP17-13-1)
-1	436	0.050 106	0.001 466	0.282 558	0.000 013	0.282 546	1.3	0.46	0.99	1.32
-2	436	0.036 115	0.001 078	0.282 548	0.000 010	0.282 539	1.0	0.35	1.00	1.34
-3	436	0.044 681	0.001 293	0.282 527	0.000 011	0.282 516	0.2	0.39	1.03	1.39
-4	436	0.032 131	0.000 935	0.282 554	0.000 011	0.282 546	1.3	0.39	0.99	1.32
-5	436	0.042 789	0.001 205	0.282 574	0.000 010	0.282 564	1.9	0.35	0.96	1.28
-6	436	0.054 387	0.001 529	0.282 554	0.000 011	0.282 542	1.1	0.39	1.00	1.33
-7	436	0.056 447	0.001 616	0.282 560	0.000 012	0.282 547	1.3	0.42	1.00	1.32
-8	436	0.042 209	0.001 205	0.282 603	0.000 011	0.282 593	2.9	0.39	0.92	1.22
-9	436	0.044 070	0.001 287	0.282 560	0.000 011	0.282 549	1.4	0.39	0.99	1.32
-10	436	0.044 171	0.001 279	0.282 546	0.000 010	0.282 536	0.9	0.35	1.01	1.35
-11	436	0.051 934	0.001 471	0.282 570	0.000 012	0.282 558	1.7	0.42	0.98	1.30
-12	436	0.041 025	0.001 180	0.282 567	0.000 012	0.282 557	1.7	0.42	0.97	1.30
-13	436	0.031 616	0.000 924	0.282 551	0.000 011	0.282 543	1.2	0.39	0.99	1.33
-14	436	0.060 554	0.001 735	0.282 589	0.000 012	0.282 575	2.3	0.42	0.96	1.26
-15	436	0.040 021	0.001 168	0.282 580	0.000 011	0.282 570	2.1	0.39	0.96	1.27
-16	436	0.052 418	0.001 514	0.282 578	0.000 010	0.282 566	2.0	0.35	0.97	1.28
-17	436	0.027 182	0.000 801	0.282 578	0.000 011	0.282 571	2.2	0.39	0.95	1.27
-18	436	0.038 163	0.001 123	0.282 571	0.000 011	0.282 562	1.8	0.39	0.97	1.29
-19	436	0.035 878	0.001 071	0.282 558	0.000 012	0.282 549	1.4	0.42	0.98	1.32
-20	436	0.045 109	0.001 316	0.282 562	0.000 012	0.282 551	1.4	0.42	0.98	1.31
-21	436	0.032 101	0.000 951	0.282 580	0.000 011	0.282 572	2.2	0.39	0.95	1.26
-22	436	0.030 691	0.000 913	0.282 549	0.000 010	0.282 542	1.1	0.35	0.99	1.33
-23	436	0.053 181	0.001 508	0.282 544	0.000 011	0.282 532	0.8	0.39	1.02	1.36
-24	436	0.054 339	0.001 484	0.282 579	0.000 011	0.282 567	2.0	0.39	0.96	1.28

桂东南莲垌和古龙岩体加里东期I型花岗岩类的岩石成因及构造意义

Petrogenesis and tectonic significance of Caledonian I-Type granitoids in the Gulong and Liandong plutons in southeastern Guangxi

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