黑龙江杂岩蓝片岩-云母片岩矿物成分及变质作用<i>P</i>-<i>T</i>条件

李蓉; 孙德有; 铃木和博; 郑常青

doi:10.3799/dqkx.2013.028

黑龙江杂岩蓝片岩-云母片岩矿物成分及变质作用P-T条件

doi: 10.3799/dqkx.2013.028

1.
吉林大学地球科学学院，长春 130061
2.
名古屋大学年代测定综合研究中心，日本名古屋 464-8602

基金项目:

国家自然基金项目 41172058

中国地质调查局项目 1212010070301

详细信息

作者简介:
李蓉(1988-)，女，硕士研究生，主要从事岩石地球化学研究.E-mail: lirong10@mails.jlu.edu.cn

通讯作者:
孙德有，E-mail: sundy@jlu.edu.cn

中图分类号: P584
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出版历程
- 收稿日期: 2012-04-15
- 刊出日期: 2013-03-01

Mineral Compositions and P-T Conditions of the Blueschist-Mica Schist in Heilongjiang Complex

1.
College of Earth Sciences, Jilin University, Changchun 130061, China
2.
The Center for Chronological Research, Nagoya Uniwersity, Nagoya 464-8602, Japan

摘要

摘要: 黑龙江构造混杂岩中保留着一套曾遭受过中高压变质作用的岩石，其代表性岩石为：蓝片岩-云母片岩；蓝闪石、铁蓝闪石和多硅白云母(单位结构中Si=3.37~3.46＞3.30)等具有中高压性质的典型变质矿物在岩石中平衡共生.蓝片岩-云母片岩组合至少经历了早期和晚期两阶段变质，早期为绿帘蓝片岩相，变质温压条件为T=320~460 ℃，P=7.8×10⁸~11×10⁸ Pa.晚期为高绿片岩相，出现富镁绿泥石(X_Mg=0.565~0.646)交代早期钠质角闪石和多硅白云母等高压变质矿物现象，变质温度升高而压力有所降低，由石榴石云母片岩所限定的高绿片岩相变质条件为T=536~598 ℃，P=6.8×10⁸~9.5×10⁸ Pa，属中温和中高压变质.
- 蓝片岩 /
- 云母片岩 /
- 矿物成分 /
- 黑龙江杂岩 /
- 岩石学 /
- 地球化学
Abstract: A sequence of middle-high-pressure metamorphic rocks occurs in the Heilongjiang Complex, whose representative lithology is blueschist and mica schist. Characteristic minerals of middle-high-pressure metamorphism, such as glaucophane, ferro-glaucophane and phengite (Si=3.37 to 3.46 > 3.30) are observed in the metamorphic rocks. The rock association, blueschist and mica schist, has suffered at least two stages of metamorphism. The P-T conditions are estimated to be 320 to 460 ℃ and 7.8×10⁸ to 11×10⁸ Pa, which correspond to early stage epidote-blueschist facies. The late stage is high-greenschist facies, which is characterized by the replacement of glaucophane and phengite by magnesium-rich (X_Mg=0.565 to 0.646) chlorite. The metamorphic conditions constrained by garnet mica schist are 536~598 ℃ and 6.8×10⁸ to 9.5×10⁸ Pa, consistent with medium temperature and middle-high pressure metamorphism.
- blueschist /
- mica schist /
- mineral compositions /
- Heilongjiang complex /
- petrology /
- geochemistry

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图 1 佳木斯地块地质简图及依兰地区黑龙江杂岩分布简图(据Zhou et al., 2009, 有修改)

Fig. 1. Geological sketch of the Jiamusi terrane and distribution diagram of Heilongjiang complexes inYilan area

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图 2 岩石镜下显微照片

a.蓝闪石片岩；b.蓝闪石片岩；c.绿帘蓝闪绿泥白云母片岩；d.黑硬绿泥石白云石英片岩；e.石榴石二云母片岩；f.石榴石二云母片岩

Fig. 2. Microscopically micrograph of the rock sample

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图 3 钠质角闪石的分类(据Leak et al., 1997, 有修改)

Fig. 3. Classification of sodium amphibloes

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图 4 白云母成分与变质程度关系(据Miyashiro，1979)

Fig. 4. The relationship of composition of white mica and metamorphicgrade

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图 5 依兰地区黑龙江杂岩带中蓝片岩类的P-T条件估算(P-T网格线据Evans, 1990, 多硅白云母压力计据Massonne and Szpurka，1997)

图中LBS、EBS、ECL、AEA、GS、PA、A分别表示：硬柱石蓝片岩相、绿帘蓝片岩相、榴辉岩相、钠长-绿帘角闪岩相、绿片岩相和绿纤石阳起石相和角闪岩相.(Ⅰ) Jd+Qtz=Ab (Holland, 1983)；(Ⅱ) Grs+Rt+Qtz+H₂O =Zo+Tit (Holland and Powell, 1998)，阴影区域为本文所研究矿物的稳定区

Fig. 5. Estimated P-T conditions of blue schist from Heilongjiang complex in the Yilan area

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图 6 角闪石矿物中Al^Ⅳ和Na_M4变化图解(转宋海峰, 2006)

Fig. 6. The Na_M4-Al^Ⅳ variation diagram of the Amphibole

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表 1 依兰地区蓝片岩类岩石中钠质角闪石矿物化学成分(%)

Table 1. Chemical compositions of sodium amphiboles in Blueschist from the Yilan area (%)

岩性	蓝闪石片岩(DY0371-7)										緑帘蓝闪绿泥白云母片岩(DY0371-3、DY0371-8)
点号	76a	77a	82a	83a	84a	99b	100b	101b	104b	105b	106b	107b	128a	129a	130a	131a	148b	149b	150b	151b
端元组分	Gln	Gln	Fe-gln	Fe-gln	Fe-gln	Gln	Gln	Fe-gln	Mg-rbk	Mg-rbk	Mg-rbk	Mg-rbk	Mg-rbk	Mg-rbk	Mg-rbk	Mg-rbk	Mg-rbk	Mg-rbk	Mg-rbk	Mg-rbk
SiO₂	54.016	54.218	54.201	54.473	54.875	53.935	54.534	54.404	54.291	53.499	53.262	52.830	54.438	54.514	54.801	54.110	54.059	54.031	54.054	54.110
TiO₂	0.020	0.000	0.034	0.013	0.055	0.042	0.035	0.041	0.036	0.040	0.020	0.023	0.026	0.046	0.016	0.034	0.027	0.076	0.094	0.046
Al₂O₃	8.852	8.720	7.401	6.802	7.017	7.667	8.383	8.232	7.035	5.676	5.287	4.810	5.749	5.985	6.018	4.338	4.592	4.965	4.629	4.771
Cr₂O₃	0.636	0.738	0.269	0.159	0.154	0.529	0.509	0.513	0.458	1.225	1.328	1.998	0.905	0.599	0.384	0.840	0.810	1.083	1.196	0.999
FeO	19.315	19.300	22.002	21.346	21.068	19.674	19.003	19.376	20.278	21.078	21.377	21.988	19.248	18.087	17.947	19.750	18.834	18.676	19.559	18.786
MnO	0.159	0.216	0.200	0.140	0.143	0.158	0.167	0.154	0.193	0.227	0.227	0.238	0.248	0.157	0.169	0.061	0.107	0.095	0.107	0.143
MgO	6.077	6.325	4.959	5.837	5.896	6.416	6.286	6.055	6.474	7.278	7.266	7.563	8.721	9.170	8.643	9.467	9.416	9.413	9.182	9.576
CaO	0.000	0.000	0.000	0.000	0.000	0.024	0.021	0.054	0.026	0.013	0.023	0.028	0.018	0.000	0.005	0.032	0.000	0.000	0.000	0.005
Na₂O	6.585	6.508	6.726	6.807	6.834	6.435	6.579	6.535	6.561	6.178	6.086	5.659	6.221	6.517	6.507	6.445	6.186	6.416	6.184	6.503
K₂O	0.037	0.027	0.025	0.027	0.012	0.046	0.019	0.037	0.027	0.022	0.048	0.073	0.020	0.022	0.015	0.018	0.011	0.023	0.035	0.011
Total	95.697	96.052	95.817	95.604	96.054	94.926	95.536	95.401	95.379	95.236	94.924	95.210	95.594	95.097	94.505	95.095	94.042	94.778	95.040	94.950
Si	7.775	7.760	7.906	7.931	7.941	7.828	7.856	7.867	7.865	7.740	7.740	7.635	7.755	7.787	7.894	7.765	7.808	7.759	7.751	7.759
Al^Ⅳ	0.225	0.240	0.094	0.069	0.059	0.172	0.144	0.133	0.135	0.260	0.260	0.365	0.245	0.213	0.106	0.235	0.192	0.241	0.249	0.241
Al^Ⅵ	1.277	1.231	1.178	1.098	1.138	1.139	1.279	1.270	1.066	0.708	0.646	0.454	0.720	0.795	0.916	0.498	0.589	0.599	0.533	0.565
Fe³⁺	1.026	1.115	0.970	1.025	0.972	1.136	0.952	0.940	1.154	1.662	1.727	2.071	1.690	1.531	1.321	1.828	1.770	1.712	1.834	1.742
Ti	0.002	0.000	0.004	0.001	0.006	0.005	0.004	0.004	0.004	0.004	0.002	0.002	0.003	0.005	0.002	0.004	0.003	0.008	0.010	0.005
Cr	0.072	0.084	0.031	0.018	0.018	0.061	0.058	0.059	0.052	0.140	0.153	0.228	0.102	0.068	0.044	0.095	0.092	0.123	0.136	0.113
Fe²⁺	1.299	1.195	1.714	1.574	1.577	1.252	1.337	1.403	1.302	0.888	0.871	0.586	0.603	0.629	0.841	0.542	0.504	0.531	0.511	0.511
Mn	0.019	0.026	0.025	0.017	0.018	0.019	0.020	0.019	0.024	0.028	0.028	0.029	0.030	0.019	0.021	0.007	0.013	0.012	0.013	0.017
Mg	1.304	1.350	1.078	1.267	1.272	1.388	1.350	1.305	1.398	1.570	1.574	1.629	1.852	1.953	1.856	2.025	2.027	2.015	1.963	2.047
Ca	0.000	0.000	0.000	0.000	0.000	0.004	0.003	0.008	0.004	0.002	0.004	0.004	0.003	0.000	0.001	0.005	0.000	0.000	0.000	0.001
Na	1.838	1.806	1.902	1.921	1.917	1.811	1.837	1.832	1.843	1.733	1.715	1.585	1.718	1.805	1.817	1.793	1.732	1.786	1.719	1.808
K	0.007	0.005	0.005	0.005	0.002	0.009	0.003	0.007	0.005	0.004	0.009	0.013	0.004	0.004	0.003	0.003	0.002	0.004	0.006	0.002
Total	14.844	14.811	14.907	14.926	14.919	14.823	14.844	14.847	14.852	14.739	14.727	14.603	14.725	14.809	14.821	14.801	14.734	14.790	14.726	14.811
注：Gln.蓝闪石；Fe-gln.铁蓝闪石；Mg-rbk.镁钠闪石；a.早期；b.晚期.

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表 2 依兰地区黑龙江杂岩多硅白云母矿物化学成分(%)

Table 2. Chemical compositions of phengite in the Heilongjiang complex from Yilan area (%)

岩性	蓝闪石片岩(DY0371-7)						蓝闪绿泥白云母片岩(DY0371-8)					石榴石二云母片岩(DY0366-2)
点号	67	68	69	70	71	72	176	177	178	179	180	125	126	127	128	129	130	131
SiO₂	48.677	49.129	49.943	49.353	48.916	48.879	48.308	48.226	48.666	48.627	48.008	45.776	45.887	46.056	45.991	45.008	45.335	45.328
TiO₂	0.177	0.151	0.152	0.106	0.144	0.110	0.161	0.164	0.140	0.163	0.224	0.861	0.554	0.548	0.606	0.645	1.051	0.652
Al₂O₃	24.348	24.973	23.909	25.264	25.452	24.917	25.794	25.496	25.115	25.504	24.912	32.132	31.758	31.887	32.348	31.860	31.189	31.979
FeO	6.015	5.486	5.618	4.725	5.139	5.458	4.827	5.065	5.049	5.115	5.184	1.873	1.880	1.911	1.916	1.796	1.953	1.689
MnO	0.044	0.033	0.062	0.044	0.061	0.071	0.020	0.038	0.018	0.002	0.037	0.000	0.002	0.000	0.000	0.000	0.000	0.000
MgO	2.899	2.853	3.010	2.827	2.614	2.543	2.839	2.975	3.060	3.035	3.116	1.700	1.828	1.803	1.727	1.612	1.862	1.682
CaO	0.008	0.006	0.020	0.028	0.012	0.003	0.026	0.019	0.007	0.000	0.027	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Na₂O	0.094	0.141	0.089	0.162	0.147	0.155	0.178	0.298	0.246	0.292	0.278	0.915	0.842	0.880	0.979	0.894	0.830	0.862
K₂O	9.718	10.793	10.965	10.448	10.647	10.641	9.114	10.338	10.298	10.699	10.372	9.940	9.976	9.878	9.845	10.004	10.233	10.077
Total	91.333	92.918	93.121	92.310	92.485	92.130	90.620	91.972	91.952	92.790	91.511	92.550	92.080	92.316	92.765	91.172	91.806	91.622
Si	3.425	3.409	3.461	3.423	3.400	3.417	3.390	3.371	3.398	3.375	3.378	3.128	3.150	3.152	3.133	3.124	3.134	3.129
Al^Ⅳ	0.575	0.591	0.539	0.577	0.600	0.583	0.610	0.629	0.602	0.625	0.622	0.872	0.850	0.848	0.867	0.876	0.866	0.871
Al^Ⅵ	1.443	1.451	1.414	1.489	1.486	1.471	1.523	1.471	1.464	1.461	1.444	1.716	1.720	1.723	1.730	1.731	1.675	1.731
Ti	0.009	0.008	0.008	0.006	0.008	0.006	0.008	0.009	0.007	0.009	0.012	0.044	0.029	0.028	0.031	0.034	0.055	0.034
Fe	0.354	0.318	0.326	0.274	0.299	0.319	0.283	0.296	0.295	0.297	0.305	0.107	0.108	0.109	0.109	0.104	0.113	0.098
Mn	0.003	0.002	0.004	0.003	0.004	0.004	0.001	0.002	0.001	0.000	0.002	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Mg	0.304	0.295	0.311	0.292	0.271	0.265	0.297	0.310	0.318	0.314	0.327	0.173	0.187	0.184	0.175	0.167	0.192	0.173
Ca	0.001	0.000	0.001	0.002	0.001	0.000	0.002	0.001	0.001	0.000	0.002	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Na	0.013	0.019	0.012	0.022	0.020	0.021	0.024	0.040	0.033	0.039	0.038	0.121	0.112	0.117	0.129	0.120	0.111	0.115
K	0.872	0.955	0.969	0.925	0.944	0.949	0.816	0.922	0.917	0.947	0.931	0.866	0.874	0.862	0.856	0.886	0.902	0.887
Total	6.999	7.049	7.045	7.012	7.031	7.035	6.955	7.052	7.037	7.067	7.061	7.028	7.029	7.024	7.030	7.042	7.048	7.038
注：白云母分子式计算中用的氧原子基数为11.

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表 3 依兰地区二云母片岩中代表性矿物化学成分(%)

Table 3. Chemical compositions of minerals in two- mica schist from the Yilan area (%)

成分	石榴石									斜长石					黑云母
点号	97	98	99	100	101	253	254	255	256		228	229	230		115	116	117	118	119	243	244	245
SiO₂	36.181	36.476	36.595	36.269	36.647	36.984	37.026	36.939	37.009	SiO₂	61.919	62.278	62.803	SiO₂	35.911	35.424	35.184	35.505	34.039	37.044	36.605	36.523
TiO₂	0.053	0.033	0.083	0.065	0.038	0.048	0.038	0.039	0.063	Al₂O₃	23.547	23.358	22.734	TiO₂	1.532	1.565	1.661	1.755	1.632	2.173	1.631	1.694
Al₂O₃	20.826	20.917	20.849	20.846	21.004	21.170	21.067	21.065	21.003	FeO	0.018	0.033	0.029	Al₂O₃	17.059	17.032	17.080	17.364	16.145	18.027	17.441	17.065
FeO	27.588	26.897	26.512	28.196	28.512	27.139	29.094	29.219	26.964	CaO	5.064	4.694	4.012	FeO	16.560	16.876	17.058	17.034	18.384	16.056	16.883	17.463
MnO	3.278	3.487	3.416	3.799	3.769	3.344	3.535	3.640	3.301	Na₂O	8.810	8.982	9.458	MnO	0.044	0.079	0.069	0.076	0.027	0.086	0.052	0.093
MgO	1.858	2.129	2.111	2.358	2.232	1.983	2.132	2.187	1.883	K₂O	0.059	0.053	0.056	MgO	12.487	11.842	11.691	11.637	11.032	10.079	12.150	11.850
CaO	8.800	8.592	8.955	7.295	7.400	8.879	7.200	6.774	9.312	BaO	0.000	0.000	0.000	CaO	0.013	0.068	0.024	0.031	0.217	0.043	0.049	0.100
Total	98.584	98.531	98.521	98.828	99.602	99.547	100.09	99.863	99.535	Total	99.417	99.398	99.092	Na₂O	0.183	0.223	0.183	0.114	0.124	0.116	0.248	0.156
Si	2.948	2.962	2.968	2.948	2.956	2.969	2.971	2.971	2.973	Si	2.760	2.773	2.802	K₂O	9.295	8.609	8.898	9.143	7.617	9.025	9.017	8.822
Ti	0.003	0.002	0.005	0.004	0.002	0.003	0.002	0.002	0.004	Al	1.237	1.226	1.195	Total	92.437	91.071	91.201	92.012	88.570	92.002	93.429	93.119
Al	1.999	2.001	1.993	1.997	1.997	2.003	1.992	1.997	1.989	Fe	0.001	0.001	0.001	Si	2.764	2.765	2.751	2.751	2.751	2.836	2.780	2.790
Fe	1.879	1.826	1.798	1.917	1.923	1.822	1.952	1.965	1.811	Ca	0.242	0.224	0.192	Al^Ⅳ	1.236	1.235	1.249	1.249	1.249	1.164	1.220	1.210
Mn	0.226	0.240	0.235	0.262	0.257	0.227	0.240	0.248	0.225	Na	0.761	0.775	0.818	Al^Ⅵ	0.312	0.332	0.325	0.336	0.288	0.463	0.342	0.326
Mg	0.226	0.258	0.255	0.286	0.268	0.237	0.255	0.262	0.226	K	0.003	0.003	0.003	Ti	0.089	0.092	0.098	0.102	0.099	0.125	0.093	0.097
Ca	0.768	0.747	0.778	0.635	0.639	0.764	0.619	0.584	0.801	Ba	0.000	0.000	0.000	Fe³⁺	0.157	0.195	0.178	0.185	0.216	0.325	0.199	0.214
Total	8.049	8.036	8.031	8.049	8.043	8.026	8.031	8.029	8.029	Total	5.004	5.003	5.011	Fe²⁺	0.909	0.907	0.938	0.918	1.026	0.703	0.873	0.902
Py	7.3	8.4	8.3	9.2	8.7	7.8	8.3	8.6	7.4	An	24.0	22.3	18.9	Mn	0.003	0.005	0.005	0.005	0.002	0.006	0.003	0.006
Alm	60.6	59.5	58.6	61.8	62.3	59.7	63.7	64.2	59.1	Ab	75.6	77.4	80.8	Mg	1.433	1.378	1.363	1.344	1.329	1.150	1.376	1.349
Gro	24.8	24.3	25.4	20.5	20.7	25.0	20.2	19.1	26.2	Or	0.3	0.3	0.3	Ca	0.001	0.006	0.002	0.003	0.019	0.004	0.004	0.008
Sp	7.3	7.8	7.7	8.4	8.3	7.5	7.8	8.1	7.3					Na	0.027	0.034	0.028	0.017	0.019	0.017	0.037	0.023
														K	0.913	0.857	0.888	0.904	0.785	0.882	0.874	0.860
														Total	7.843	7.805	7.822	7.815	7.784	7.675	7.801	7.786
注：离子计算石榴石O=12，斜长石O=8，黑云母O=11(黑云母数据用Geokit软件计算).

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表 4 依兰地区蓝片岩类岩石中绿泥石矿物化学成分(%)

Table 4. Chemical compositions of chlorite in Blueschist from the Yilan area (%)

岩性	蓝闪绿泥白云母片岩(DY0371-3)										蓝闪绿泥白云母片岩(DY0371-8)
点号	134	135	136	137	138	139	140	141	142	143	155	156	166	181	182	183	184
端元组分	Pyc	Pyc	Pyc	Pch	Pch	Pch	Pch	Pch	Pch	Pyc	Pyc	Pyc	Pyc	Pch	Pch	Pyc	Pyc
SiO₂	27.388	26.175	26.818	26.450	25.937	26.189	26.257	26.311	26.176	26.456	26.749	26.838	26.604	26.226	26.225	26.413	26.746
TiO₂	0.001	0.007	0.018	0.024	0.012	0.032	0.029	0.041	0.011	0.032	0.041	0.031	0.047	0.057	0.035	0.079	0.035
Al₂O₃	19.734	18.722	20.157	19.478	19.767	19.894	19.675	19.307	19.180	19.103	18.300	18.506	18.520	19.035	19.343	18.853	19.092
Cr₂O₃	0.041	0.022	0.010	0.034	0.055	0.024	0.015	0.046	0.023	0.016	0.002	0.025	0.011	0.005	0.000	0.017	0.004
FeO	22.078	22.522	21.128	22.243	22.075	22.675	22.706	22.506	22.470	22.550	21.034	20.245	20.018	20.137	19.226	21.004	20.543
MnO	0.275	0.202	0.278	0.366	0.385	0.341	0.286	0.424	0.268	0.373	0.318	0.295	0.318	0.226	0.323	0.338	0.236
MgO	16.108	17.208	16.024	17.580	17.755	17.417	17.447	17.709	17.442	17.266	18.923	19.374	19.405	18.980	19.684	18.695	19.236
CaO	0.069	0.039	0.087	0.035	0.013	0.040	0.024	0.019	0.012	0.064	0.070	0.041	0.088	0.055	0.025	0.077	0.044
Na₂O	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.011	0.012	0.013	0.000	0.000	0.000	0.000
K₂O	0.055	0.024	0.014	0.025	0.006	0.009	0.008	0.026	0.030	0.033	0.033	0.006	0.024	0.054	0.026	0.015	0.044
Total	85.749	84.921	84.534	86.235	86.005	86.621	86.447	86.389	85.612	85.893	85.481	85.373	85.048	84.775	84.887	85.491	85.980
Si	5.786	5.629	5.723	5.586	5.495	5.518	5.543	5.561	5.580	5.623	5.670	5.668	5.639	5.580	5.545	5.598	5.613
Ti	0.000	0.001	0.003	0.004	0.002	0.005	0.005	0.007	0.002	0.005	0.007	0.005	0.007	0.009	0.006	0.013	0.006
Al	4.914	4.745	5.070	4.848	4.935	4.940	4.895	4.809	4.818	4.785	4.572	4.606	4.627	4.773	4.820	4.709	4.722
Cr	0.007	0.004	0.002	0.006	0.009	0.004	0.003	0.008	0.004	0.003	0.000	0.004	0.002	0.001	0.000	0.003	0.001
Fe	3.900	4.050	3.770	3.928	3.910	3.995	4.008	3.977	4.005	4.007	3.728	3.575	3.548	3.582	3.399	3.723	3.605
Mn	0.049	0.037	0.050	0.065	0.069	0.061	0.051	0.076	0.048	0.067	0.057	0.053	0.057	0.041	0.058	0.061	0.042
Mg	5.074	5.517	5.098	5.535	5.607	5.471	5.491	5.580	5.543	5.470	5.980	6.100	6.132	6.020	6.204	5.907	6.018
Ca	0.016	0.009	0.020	0.008	0.003	0.009	0.005	0.004	0.003	0.015	0.016	0.009	0.020	0.013	0.006	0.017	0.010
Na	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.005	0.005	0.005	0.000	0.000	0.000	0.000
K	0.015	0.007	0.004	0.007	0.002	0.002	0.002	0.007	0.008	0.009	0.009	0.002	0.006	0.015	0.007	0.004	0.012
Total	19.761	19.999	19.740	19.987	20.032	20.006	20.004	20.028	20.011	19.983	20.044	20.026	20.045	20.032	20.044	20.035	20.027
Mg/Mg+Fe	0.565	0.577	0.575	0.585	0.589	0.578	0.578	0.584	0.581	0.577	0.616	0.630	0.633	0.627	0.646	0.613	0.625
注：Pyc.密绿泥石；Pch.蠕绿泥石(O=28).

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表 5 石榴石二云母片岩温压估算结果

Table 5. The P-T conditions estimate result of Two mica schist from the Yilan area

输入值		计算值				输入值
T (℃)	P (10⁸ Pa)	T_gb (℃)	P_{1, 2} (10⁸ Pa)	P₁ (10⁸ Pa)	P₂ (10⁸ Pa)	Fe_tot-bio	Mg-bio	Al^VI-bio	Ti-bio	Ca-pl	Na-pl	K-pl	Fe-grt	Mg-grt	Ca-grt	Mn-grt
542	9.3	542	9.3	9.1	9.4	1.066	1.365	0.355	0.094	0.242	0.761	0.003	1.879	0.226	0.768	0.226
569	8.4	569	8.4	8.3	8.5	1.083	1.357	0.341	0.097	0.224	0.388	0.002	1.826	0.258	0.747	0.240
576	8.5	576	8.5	8.3	8.6	1.102	1.378	0.332	0.092	0.192	0.409	0.002	1.917	0.286	0.635	0.262
566	7.8	566	7.8	7.7	7.9	1.115	1.363	0.325	0.098	0.224	0.388	0.002	1.923	0.268	0.639	0.257
567	9.5	567	9.5	9.4	9.6	1.104	1.344	0.336	0.102	0.242	0.761	0.003	1.883	0.255	0.666	0.256
582	7.9	582	7.9	7.7	8.1	1.242	1.329	0.288	0.099	0.224	0.388	0.002	1.943	0.267	0.612	0.257
536	6.8	536	6.8	6.6	6.9	1.116	1.349	0.326	0.097	0.224	0.388	0.002	2.031	0.243	0.553	0.240
539	8.0	539	8.0	7.8	8.2	1.135	1.365	0.311	0.101	0.192	0.409	0.002	1.897	0.221	0.714	0.229
567	9.5	567	9.5	9.3	9.6	1.126	1.344	0.316	0.105	0.242	0.761	0.003	1.912	0.256	0.668	0.249
560	7.7	560	7.7	7.7	7.8	1.067	1.367	0.361	0.094	0.224	0.388	0.002	1.931	0.270	0.644	0.250
560	7.9	560	7.9	7.8	8.0	1.059	1.388	0.348	0.098	0.192	0.409	0.002	1.953	0.280	0.596	0.264
553	8.2	553	8.2	8.1	8.3	1.055	1.368	0.350	0.097	0.224	0.388	0.002	1.811	0.237	0.812	0.234
581	9.3	581	9.3	9.3	9.3	1.028	1.150	0.463	0.125	0.192	0.409	0.002	1.809	0.241	0.810	0.242
562	8.3	562	8.3	8.2	8.5	1.072	1.376	0.342	0.093	0.224	0.388	0.002	1.783	0.244	0.776	0.245
550	8.0	550	8.0	8.0	8.1	1.029	1.346	0.371	0.102	0.224	0.388	0.002	1.822	0.237	0.764	0.227
598	9.0	598	9.0	9.0	9.0	1.028	1.150	0.463	0.125	0.192	0.409	0.002	1.905	0.292	0.613	0.264
544	7.3	544	7.3	7.2	7.4	1.049	1.363	0.338	0.105	0.224	0.388	0.002	1.952	0.255	0.619	0.240
548	7.6	548	7.6	7.5	7.7	1.055	1.366	0.342	0.102	0.192	0.409	0.002	1.965	0.262	0.584	0.248
570	9.0	570	9.0	9.1	9.0	1.028	1.150	0.463	0.125	0.192	0.409	0.002	1.811	0.226	0.801	0.225
571	9.4	571	9.4	9.3	9.5	1.029	1.346	0.371	0.102	0.242	0.761	0.003	1.915	0.284	0.611	0.258
574	8.3	574	8.3	8.3	8.4	1.049	1.363	0.338	0.105	0.192	0.409	0.002	1.905	0.292	0.613	0.264

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