浙中印支晚期伸展事件:NNE向带状分布A型碱性花岗岩的证据

金宠; 刘荣; 邵新宇; 贾宝剑; 纪世磊

doi:10.16562/j.cnki.0256-1492.2018.04.008

浙中印支晚期伸展事件:NNE向带状分布A型碱性花岗岩的证据

1.
浙江省地质矿产研究所，杭州 310007

2.
浙江大学海洋学院，舟山 316021

基金项目:
浙江省地勘资金项目(2014006);浙江地勘局科技项目((2014)90)

详细信息

作者简介: 金宠(1978—), 男, 博士, 高级工程师, 主要从事构造地质和区域地质研究, E-mail:chong.jin78@gmail.com

通讯作者: 刘荣, 高级工程师, 地球化学专业, E-mail:liucug@126.com

中图分类号: P611.1

周立君编辑

收稿日期: 2017-05-31

修回日期: 2017-08-03

刊出日期: 2018-08-28

Late Indosinian extensional event in Central Zhejiang Province:Evidence from the NNE-trending A-type alkaline granite belt

1.
Zhejiang Institute of Geology and Mineral Rescource, Hangzhou 310007, China

2.
Ocean College, Zhejiang University, Zhoushan 316021, China

More Information

Corresponding author: LIU Rong, liucug@126.com

Received Date: 31 May 2017

Revised Date: 03 August 2017

Publish Date: 28 August 2018

摘要

摘要:
出露于浙江省江绍对接带内印支晚期花岗岩呈NNE向产出, 锆石U-Pb年代学研究表明其形成于230~220Ma。地球化学分析显示该系列岩石富K₂O和Al₂O₃, 低Na₂O和MgO, 为准铝质-过铝质的钾质-钾玄质花岗岩。岩体氧化物与SiO₂呈明显的负相关, 反映浙江省印支期侵入岩的原始岩浆可能的同源性。岩体富集Th、La、Ce等大离子亲石元素及轻稀土元素, 亏损Ba、Sr、P、Ti等高场强元素, 轻重稀土分馏明显, (La/Yb) _N=12.87~140.02, δEu=0.1~0.7, 具高的10⁴×Ga/Al值及Zr、Nb、Ce、Y含量, 为板内A型花岗岩的特征。岩石有较高的I_Sr值(0.7069~0.7203)和较低的εNd (t)值(-14.9~-4.1), 其二阶段Nd同位素模式年龄为1.33~2.21Ga。地球化学特征指示浙江印支期花岗岩是伸展环境下, 具有壳幔作用和地壳物质的部分熔融而形成。结合该区发现的同期基性岩墙群, 说明浙江境内在230Ma构造环境转换已经完成, 板内沿古碰撞带拉张伸展和陆内裂谷作用, 超基性-基性-碱性岩浆的底侵形成壳幔作用及部分熔融地壳物质。
- 锆石U-Pb年龄 /
- 伸展 /
- 浙江 /
- 印支晚期
Abstract:
The NNE-trending granites distributed along the Jiangshan-Shaoxing fault zone, Zhejiang province, was formed in230~220 Ma of late Indosinian according to zircon U-Pb dating.Geochemical data indicates that the igneous rocks are high in Al₂O₃ and K₂O and low in Na₂O and MgO, and belong to a type of metaluminous-peraluminous high-K calcalkaline shoshonitic granites.The oxides and their negative correlation with SiO₂ demonstrate that the late Indosinian granites in Zhejiang Province should be from a homologous magma.They are concentrated in LILE (Th、La、Ce) and LREE, but depleted in high field-strength elements, such as Ba, Sr, P, Ti.Whole-rock LREE/HREE ratios are ((La/Yb) _N=12.87~140.02) withδEu=0.1~0.7.And the 10⁴)×Ga/Al ratios and (Zr+Nb+Ce+Y) contents are also high.In addition, the characteristics of Sr-Nd isotopic show high value of I_Sr (0.7069~0.7203) and low value of εNd (t) (-14.9~-4.1) with two-stage depleted mantle Nd model ages of 1.33~2.21 Ga.The geochemical characteristics indicate that the Indosinian granites are intraplate A-type granites formed in an extensional environment under combined crust-mantle effect and partial melting of crust material.In consideration of the contemporaneous mafic dyke swarms in some places, it is supposed that the tectonic transformation was completed 230 Ma in Zhejiang Province.With the intracontinental rifting along the ancient collision zone, the underplating invasion of ultrabasic-basic-alkaline magma caused the crust-mantle interaction and partial melting of the crust.
- zircon U-Pb dating /
- extension /
- Zhejiang /
- Late Indosinian

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图 1 华南印支期侵入岩及其年龄分布(修改自文献[21, 22])

Figure 1.

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图 2 浙江省印支期侵入岩及其年龄分布(带星号是本文采样位置)

Figure 2.

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图 3 锆石U-Pb年龄图及代表性锆石阴极发光图

Figure 3.

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图 4 浙江印支期侵入岩岩石类型判别图解(数据除表 3外, 各岩体数据来源对应表 2)

Figure 4.

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图 5 浙江印支期侵入岩Harker图解(数据来源同图 4)

Figure 5.

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图 6 印支期侵入岩标准化蛛网图^[58](a)和标准化REE^[58] (b) (数据来源同图 4）

Figure 6.

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图 7 浙江印支期侵入岩岩体Nd同位素组成与年龄关系图

Figure 7.

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图 8 浙江印支期侵入岩岩石类型判别图解(底图据文献[57], 数据来源同图 4)

Figure 8.

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图 9 浙江印支期侵入岩的构造环境判别图解(底图据文献[56], 数据来源同图 4)

Figure 9.

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图 10 浙江印支期侵入岩的岩浆物源Sr-Nd同位素图解(数据来源同图 7)

Figure 10.

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表 1 浙江印支期岩体锆石U-Pb同位素定年结果

Table 1. LA-ICP-MS U-Pb dating results of zircons from the Indosinian intrusive rocks in Zhejiang

	²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²³²Th/²³⁸U
	比值	1δ	比值	1δ	比值	1δ	年龄/Ma	1δ	年龄/Ma	1δ	年龄/Ma	1δ	比值	1δ
ZJ11
ZJ11-01	0.06	0.00	0.30	0.02	0.03	0.00	761.12	149.99	266.38	16.76	219.43	5.40	1.20	1.00
ZJ11-02	0.06	0.00	0.25	0.01	0.03	0.00	453.75	113.88	226.86	6.83	205.47	2.11	1.73	1.00
ZJ11-03	0.06	0.00	0.25	0.01	0.03	0.00	564.85	79.62	230.30	7.28	197.99	2.31	0.66	1.00
ZJ11-04	0.05	0.00	0.25	0.01	0.03	0.00	33154	74.07	228.30	6.98	217.01	2.78	0.73	1.00
ZJ11-05	0.05	0.00	0.25	0.01	0.03	0.00	375.98	88.88	230.03	7.74	215.63	2.39	0.76	1.00
ZJ11-06	0.06	0.00	0.27	0.01	0.04	0.00	453.75	88.88	245.55	9.65	22188	3.82	0.98	1.00
ZJ11-07	0.05	0.00	0.24	0.01	0.03	0.00	227.85	79.62	227.85	6.65	220.23	2.41	1.23	1.00
ZJ11-08	0.05	0.00	0.26	0.01	0.04	0.00	309.32	68.51	238.04	6.46	228.73	2.34	0.87	1.00
ZJ11-09	0.05	0.00	0.25	0.01	0.04	0.00	235.25	86.10	226.80	7.01	224.49	2.60	1.24	1.00
ZJ11-10	0.06	0.00	0.29	0.02	0.04	0.00	564.85	108.32	255.99	11.84	222.49	3.43	1.25	1.00
ZJ11-11	0.06	0.00	0.29	0.01	0.04	0.00	524.11	85.17	258.74	8.65	229.63	2.96	0.92	1.00
ZJ11-12	0.05	0.00	0.27	0.02	0.04	0.00	338.95	157.39	239.47	14.75	231.04	4.91	0.98	1.00
ZJ11-13	0.05	0.00	0.1	0.01	0.03	0.00	120.46	88.88	192.53	6.30	198.52	2.34	0.89	1.00
ZJ11-14	0.05	0.00	0.26	0.01	0.04	0.00	305.62	103.69	231.49	8.83	226.08	2.85	1.62	1.00
ZJ11-15	0.05	0.00	0.23	0.01	0.03	0.00	327.84	87.03	206.43	6.77	197.10	2.43	1.63	1.00
ZJ11-16	0.08	0.00	0.37	0.01	0.03	0.00	1168.52	85.34	321.93	10.94	218.29	2.76	1.36	1.00
ZJ11-17	0.06	0.00	0.26	0.01	0.03	0.00	611.13	79.62	235.71	7.63	200.50	2.18	1.13	1.00
WY-38-1
ZJ11-18	0.05	0.00	0.27	0.01	0.04	0.00	316.73	83.33	245.05	8.88	237.57	4.58	1.03	1.00
ZJ11-19	0.05	0.00	0.25	0.01	0.03	0.00	242.66	88.88	222.82	7.65	221.32	2.70	1.16	1.00
ZJ11-20	0.05	0.00	0.25	0.01	0.03	0.00	324.13	62.03	226.59	5.39	216.45	2.79	0.90	1.00
ZJ11-21	0.06	0.00	0.26	0.01	0.03	0.00	509.30	68.51	237.02	6.84	209.00	2.59	0.82	1.00
038-1	0.05	0.00	0.26	0.01	0.04	0.00	178.00	121.00	232.00	11.00	237.00	5.00	1.14	0.05
038-2	0.05	0.00	0.26	0.01	0.04	0.00	269.00	125.00	235.00	11.00	231.00	4.00	1.15	0.05
038-3	0.05	0.00	0.27	0.01	0.04	0.00	299.00	98.00	241.00	9.00	235.00	4.00	1.03	0.06
038-4	0.05	0.00	0.25	0.01	0.04	0.00	139.00	93.00	227.00	8.00	236.00	4.00	1.15	0.05
038-5	0.05	0.01	0.25	0.04	0.04	0.00	281.00	342.00	228.00	34.00	223.00	6.00	1.32	0.04
038-6	0.05	0.00	0.27	0.01	0.04	0.00	315.00	90.00	241.00	8.00	234.00	4.00	0.95	0.06
038-7	0.05	0.00	0.25	0.01	0.04	0.00	226.00	75.00	230.00	7.00	231.00	4.00	1.25	0.05
038-8	0.05	0.00	0.27	0.02	0.04	0.00	392.00	143.00	245.00	13.00	230.00	5.00	1.02	0.06
038-9	0.05	0.00	0.26	0.01	0.04	0.00	271.00	71.00	236.00	7.00	233.00	4.00	1.30	0.05
038-10	0.05	0.01	0.25	0.05	0.04	0.00	219.00	349.00	229.00	37.00	229.00	10.00	1.14	0.05
038-11	0.05	0.01	0.25	0.03	0.04	0.00	196.00	279.00	228.00	26.00	231.00	5.00	1.15	0.05
038-12	0.06	0.00	0.30	0.02	0.04	0.00	585.00	142.00	267.00	15.00	233.00	5.00	0.93	0.06
038-13	0.05	0.00	0.25	0.02	0.04	0.00	184.00	147.00	229.00	13.00	234.00	4.00	0.80	0.07
038-14	0.05	0.00	0.26	0.01	0.04	0.00	325.00	106.00	236.00	10.00	227.00	4.00	0.93	0.06
038-15	0.05	0.01	0.25	0.05	0.04	0.00	212.00	357.00	226.00	38.00	227.00	11.00	1.19	0.05
038-16	0.05	0.00	0.26	0.02	0.04	0.00	285.00	157.00	237.00	14.00	232.00	5.00	1.37	0.04
038-17	0.05	0.01	0.26	0.03	0.04	0.00	280.00	232.00	237.00	21.00	233.00	6.00	1.08	0.06
038-18	0.05	0.01	0.25	0.03	0.04	0.00	222.00	275.00	229.00	25.00	229.00	7.00	1.00	0.06
038-19	0.05	0.00	0.25	0.01	0.04	0.00	177.00	130.00	225.00	11.00	230.00	5.00	0.96	0.06
038-20	0.05	0.00	0.27	0.02	0.04	0.00	367.00	187.00	245.00	17.00	233.00	6.00	1.33	0.04
WY-57
057-1	0.05	0.00	0.25	0.01	0.04	0.00	207.00	47.00	229.00	4.00	231.00	3.00	1.10	0.05
057-2	0.05	0.00	0.25	0.01	0.04	0.00	245.00	73.00	230.00	7.00	229.00	4.00	0.84	0.07
057-3	0.05	0.00	0.25	0.01	0.04	0.00	224.00	49.00	228.00	5.00	229.00	3.00	0.90	0.07
057-4	0.06	0.00	0.27	0.01	0.04	0.00	413.00	47.00	246.00	5.00	229.00	3.00	1.09	0.05
057-5	0.05	0.00	0.25	0.01	0.04	0.00	182.00	52.00	227.00	5.00	232.00	3.00	0.76	0.08
057-6	0.11	0.00	4.93	0.10	0.32	0.01	1856.00	33.00	1807.00	17.00	1766.00	25.00	0.68	0.09
057-7	0.05	0.00	0.26	0.01	0.04	0.00	234.00	52.00	232.00	5.00	232.00	4.00	1.06	0.06
057-8	0.05	0.00	0.26	0.01	0.04	0.00	327.00	44.00	237.00	4.00	228.00	3.00	1.27	0.05
057-9	0.05	0.00	0.25	0.01	0.04	0.00	228.00	63.00	229.00	6.00	230.00	4.00	0.99	0.06
057-10	0.05	0.00	0.25	0.01	0.04	0.00	141.00	64.00	223.00	6.00	230.00	4.00	0.93	0.06
057-11	0.05	0.00	0.26	0.01	0.04	0.00	270.00	47.00	233.00	5.00	229.00	3.00	0.88	0.07
057-12	0.05	0.00	0.25	0.01	0.04	0.00	178.00	59.00	229.00	5.00	234.00	4.00	0.93	0.06
057-13	0.05	0.00	0.25	0.01	0.04	0.00	189.00	60.00	226.00	5.00	229.00	4.00	0.80	0.07
057-14	0.05	0.00	0.25	0.01	0.04	0.00	240.00	52.00	229.00	5.00	228.00	3.00	0.90	0.07
057-15	0.05	0.00	0.26	0.01	0.04	0.00	284.00	59.00	234.00	6.00	229.00	4.00	0.68	0.09
057-16	0.05	0.00	0.26	0.01	0.04	0.00	311.00	46.00	237.00	5.00	230.00	3.00	1.08	0.05
057-17	0.05	0.00	0.25	0.01	0.04	0.00	231.00	64.00	230.00	6.00	230.00	4.00	0.81	0.07
057-18	0.05	0.00	0.26	0.01	0.04	0.00	248.00	42.00	233.00	4.00	231.00	3.00	0.99	0.06
057-19	0.06	0.00	0.29	0.02	0.04	0.00	417.00	168.00	256.00	16.00	239.00	6.00	0.80	0.07
057-20	0.05	0.00	0.25	0.01	0.04	0.00	236.00	60.00	230.00	5.00	229.00	4.00	0.62	0.09
SY-05
SY-05-1	0.05	0.00	0.25	0.01	0.04	0.00	211.19	85.17	230.51	7.64	232.01	2.62	0.39	1.00
SY-05-2	0.05	0.00	0.25	0.01	0.04	0.00	213.04	68.51	229.42	6.15	229.62	1.83	0.67	1.00
SY-05-3	0.05	0.00	0.25	0.01	0.04	0.00	198.23	28.70	223.45	5.79	224.29	2.94	0.72	1.00
SY-05-4	0.05	0.00	0.25	0.01	0.04	0.00	231.55	68.51	224.86	5.97	223.08	1.98	0.41	1.00
SY-05-5	0.05	0.00	0.26	0.01	0.04	0.00	253.77	87.95	238.51	7.78	235.63	2.63	0.61	1.00
SY-05-6	0.05	0.00	0.26	0.01	0.04	0.00	216.74	88.88	232.58	8.00	233.07	2.25	0.44	1.00
SY-05-7	0.05	0.00	0.25	0.01	0.04	0.00	146.38	70.36	225.72	6.07	232.76	2.27	0.45	1.00
SY-05-8	0.05	0.00	0.25	0.01	0.04	0.00	172.31	54.62	224.70	5.43	227.67	2.04	0.47	1.00
SY-05-9	0.05	0.00	0.28	0.01	0.04	0.00	394.50	68.51	249.11	6.90	233.10	2.26	0.51	1.00
SY-05-10	0.05	0.00	0.27	0.01	0.04	0.00	327.84	70.37	239.94	6.70	230.01	2.01	0.47	1.00
SY-05-11	0.05	0.00	0.25	0.01	0.04	0.00	187.12	67.58	227.87	6.63	231.40	3.20	0.44	1.00
SY-05-12	0.05	0.00	0.25	0.01	0.04	0.00	176.01	75.91	230.35	6.44	235.82	2.42	0.42	1.00
SY-05-13	0.05	0.00	0.24	0.01	0.04	0.00	83.43	111.10	218.68	8.92	232.65	2.39	0.54	1.00
SY-05-14	0.05	0.00	0.25	0.01	0.04	0.00	166.75	81.47	226.38	6.70	232.50	2.05	0.47	1.00
SY-05-15	0.05	0.00	0.25	0.01	0.04	0.00	127.87	80.55	223.83	6.27	231.95	1.99	0.40	1.00
SY-05-16	0.05	0.00	0.25	0.01	0.04	0.00	216.74	88.88	227.27	7.62	227.49	2.01	0.41	1.00
SY-05-17	0.05	0.00	0.25	0.01	0.04	0.00	205.63	75.91	226.06	6.56	227.12	1.88	0.45	1.00
SY-05-18	0.05	0.00	0.25	0.01	0.04	0.00	194.53	106.47	225.97	6.65	227.29	2.34	0.46	1.00
SY-05-19	0.05	0.00	0.26	0.01	0.04	0.00	309.32	64.81	235.12	6.11	226.30	2.13	0.45	1.00
SY-05-20	0.05	0.00	0.28	0.01	0.04	0.00	388.94	80.55	252.00	8.23	237.44	1.97	0.44	1.00

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表 2 浙江省印支期岩浆岩同位素年龄

Table 2. Zircon U-Pb dating results of the Indosinian intrusive rocks in Zhejiang

序号	地理位置	岩性	年龄/Ma	测试方法	资料来源
1	松阳靖居	正长花岗岩	215±2	LA-ICPMS	^[21]
2	松阳靖居	石英正长岩	230±2	LA-ICPMS	本文
3	龙泉上垟岙	二长花岗岩	230±1.7	LA-ICPMS	本文
4	遂昌翁山	二长花岗岩	225±1	SHRIMP	[22
5	遂昌翁山	二长花岗岩	224±3	LA-ICPMS	[22
6	诸暨泉水塆	混合岩化石英二长岩	224±3	LA-ICPMS	本文
7	金华张村	基性岩脉（辉长岩）	223±31	LA-ICPMS	1/25万衢州幅
8	蒲城高溪岩体	混合岩化二长花岗岩	226±5	LA-ICPMS	1/25万衢州幅
9	龙泉宝溪	黑云母二长花岗岩	226±5	LA-ICPMS	本文
10	大爽岩体大爽村	石英二长岩	227±1	LA-ICPMS	^[23]
11	大爽岩体下吴村	石英二长岩	226±1	LA-ICPMS
12	大爽岩体擂山鼓村	正长岩	224±3	LA-ICPMS
13	大爽岩体	石英二长岩	23.6±0.86	LA-ICPMS	^[24]
14	大爽岩体	含霓辉石石英正长岩	231.7±1.1	LA-ICPMS	^[24]
15	大爽岩体岭头村	二长花岗岩	227±2	LA-ICPMS	^[25]

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表 3 浙江印支期侵入岩主量元素(%)和微量元素(×10^-6)

Table 3. Major oxides (%) and trace elemental (×10^-6) compositions of the Indosinian intrusive rocks in Zhejiang

样品	宝溪岩体			靖居岩体					泉水塆	上烊岙
样品	WY-041	WY-042	WY-038-1	WY-019-2	WY-020-1	WY-020-2	WY-021	WY-022-2	ZJ11	WY-57
主量
SiO₂	72.08	76.02	65.03	48.17	67.47	60.98	74.14	73.10	75.55	77.10
TiO₂	0.30	0.08	0.81	0.83	0.69	0.2	0.11	0.33	0.16	0.08
Al₂O₃	13.92	12.61	15.61	21.45	13.76	18.63	13.33	13.92	12.56	11.99
Fe₂O₃T	2.39	1.17	3.79	7.52	4.44	3.42	1.58	2.58	1.16	1.35
FeO	1.15	0.89		5.17	2.79	1.41	0.66	108
MnO	0.05	0.03	0.11	0.19	0.06	0.07	0.03	0.02	0.06	0.02
MgO	0.28	0.08	1.19	3.21	1.1	0.64	0.30	0.54	0.13	0.00
CaO	0.19	0.42	1.88	7.02	2.62	2.48	0.24	0.13	0.82	0.16
Na₂O	3.14	3.51	3.87	0.75	2.93	2.83	2.61	0.37	3.52	3.35
K2O	6.13	5.01	5.27	7.03	4.73	9.27	5.80	7.57	5.06	4.87
P₂O₅	0.04	0.01	0.22	0.45	0.19	0.01	0.03	0.04	0.02	0.01
LOI	1.40	1.02	2.09	3.38	1.1	145	176	138	0.96	0.88
Total			99.87		99.53	99.55	99.70	99.71	100.00	99.77
A/CNK	1.15	1.06	1.01	0.94	0.97	1.21	1.54	1.23	1.02	1.10
微量
Ga	21.40	21.60		39.80	22.00	30.60	14.40	24.00	16.03
Rb	217.00	275.0	128.0	431.0	270.00	354.0	205.00	93.50	140.11	39.81
Sr	91.00	30.40	43.30	566.0	266.00	283.0	113.00	815.00	57.07	12.72
Y	36.90	32.00	30.32	57.70	40.60	29.30	25.90	21.70	21.48	42.04
Zr	133.00	117.0	42.50	115.0	155.00	95.50	165.00	101.00	202.12	38.49
Nb	21.50	31.10	5.16	27.70	22.90	15.20	21.30	19.30	16.41	9.77
Ba	393.00	62.80	344.0	1672.0	268.00	8010	747.00	307.00	64.15	66.85
La	177.00	32.60	591	142.0	61.20	255.0	18.80	266.00	82.25	53.00
ce	225.00	65.90	847.9	256.0	127.00	432.0	76.60	597.00	154.47	39.81
Pr	29.90	8.79	16.79	29.60	15.40	46.60	4.53	50.50	17.25	12.72
Nd	106.00	33.80	62.46	113.0	59.20	164.0	16.70	177.00	59.89	51.68
Sm	14.60	7.31	10.31	20.60	11.70	20.20	3.24	20.80	10.12	12.45
Eu	1.03	0.09	1.53	4.57	1.02	1.60	0.41	1.16	0.53	0.19
Gd	12.70	5.90	4.25	17.00	9.58	18.30	3.30	19.00	6.30	4.22
Tb	1.63	1.02	1.00	2.54	1.57	1.99	0.67	1.70	0.85	1.20
Dy	7.72	5.48	5.35	12.30	8.04	8.31	4.35	6.68	4.36	6.72
Ho	1.27	1.09	1.07	2.11	1.43	1.20	0.93	0.83	0.76	1.29
Er	3.59	3.27	2.70	5.95	3.98	3.40	2.86	2.61	2.06	3.27
Tm	0.49	0.52	0.42	0.91	0.61	0.41	0.47	0.31	0.29	0.46
Yb	3.14	3.50	2.40	5.97	3.88	2.57	3.18	2.09	1.93	2.95
Lu	0.46	0.50	0.33	0.90	0.55	0.39	0.47	0.34	0.28	0.40
Hf	4.52	5.53	1.62	3.72	5.19	2.82	5.85	5.09	5.88	5.76
Ta	1.33	1.94		2.29	2.42	0.84	1.46	0.85	1.28
Th	35.60	46.00	7.58	31.90	57.40	40.50	25.70	77.80	26.65	31.06
U	3.22	3.34	1.06	7.24	8.49	3.20	3.21	2.37	3.66	2.74
ΣREE	584.54	169.8	1548	613.4	305.16	955.9	136.51	1146.0	341.35	190.36
LREE/HREE	17.85	6.98	87.31	11.87	9.30	25.14	7.41	33.16	19.28	8.28
δEu	0.23	0.04	0.60	0.72	0.29	0.25	0.38	0.18	0.19	0.07
La_N/Yb_N	40.43	6.68	176.9	17.06	11.31	71.17	4.24	91.29	30.50	12.87
M	1.3	1.3	1.6	2.1	1.7	1.8	1.2	0.9	1.4	1.3
Dzr	3729.3	4239.3	11670.6	4313.0	3200.0	5193.7	3006.1	4910.9	2454.0	12886.5
t(℃)	779.7	765.5	670.5	708.9	765.1	716.5	806.8	782.1	805.2	683.5

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表 4 浙江省印支期侵入岩Sr~Nd同位素组成

Table 4. The Sr, Nd isotopic results of the Dashuang granite of the Indosinian intrusive rocks in Zhejiang

岩体	样号	年龄/Ma	Rb×10^-6	Sr×10^-6	⁸⁷Rb/⁸⁶Sr	⁸⁷Sr/⁸⁶Sr	I_Sr	Sm×10^-6	Nd×10^-6	¹⁴⁷Sm/¹⁴⁴Nd	¹⁴³Nd/¹⁴⁴Nd	εNd(t)	T_DM2/Ga	来源
遂昌翁山	LS15	224	261	289	2.618	0.725443	0.7171	12.9	87	0.090	0.511715	—14.9	2.21	^[21]
	SC107		259	296	2.536	0.724901	0.7168	15.6	116	0.081	0.511717	-14.7	2.19
	SC104		323	255	3.673	0.729014	0.7173	11.0	84.7	0.079	0.511696	—1 5.0	2.22
	SC103		282	312	2.618	0.717604	0.7092	12.0	93.3	0.078	0.511749	—13.9	2.13
	LS12		237	153	4.494	0.736175	0.7218	13.5	95.7	0.085	0.511852	-12.1	1.99
	SC106		309	192	4.665	0.725259	0.7103	11.9	73.7	0.098	0.511729	—14.9	2.21
	SC108		245	224	3.171	0.729611	0.7195	12.3	85.4	0.087	0.51174	—14.4	2.17
泉水塆	ZJ-11	224	140.1	57.1	7.118	0.737818	0.7151	10.1	59.9	0.102	0.512112	-7.6	1.62	本文
松阳靖居	SY51	215	187	171	3.170	0.727558	0.7179	25.5	268	0.057	0.511717	-14.2	2.14	^[20]
	SY56		180	177	2.943	0.729323	0.72+03	30.3	230	0.080	0.511761	—13.9	2.12
	SY60-1		221	54.3	3.013	0.728045	0.7199	19.9	154	0.078	0.511795	-13.2	2.07
东阳大爽	10DS-2	232	113.8	1298	0.254	0.711962	0.7111	14.0	104.2	0.081	0.511875	-11.5	2.03	^[22]
	10DS-3-2		120.2	1037	0.335	0.712167	0.7111	17.5	116.5	0.091	0.511969	—9.9	1.91
	10DS-4-1		124.4	1062	0.339	0.712086	0.7110	13.6	84.40	0.098	0.511918	-11.1	2.00
	10DS-5-1		125.3	889	0.408	0.712370	0.7110	16.0	1 03.0	0.094	0.511924	—10.9	1.98
	10DS-1-1		121	110.3	3.179	0.720960	0.7105	14.7	125.2	0.071	0.512024	-8.3	1.78
	10DS-7		114	48.02	6.890	0.732251	0.7095	17.3	130.8	0.080	0.512046	-8.1	1.76
宝溪	WY-038-1	226	168.5	331.5	1.498	0.711602	0.7069	10.21	63.57	0.0971	0.512281	-4.1	1.33	本文
上垟岙	WY-057	230	217.8	37.19	17.240	0.776019		312.6	52.79	0.1448	0.512049	-8.1	1.8	本文

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