巢湖北部地区晚中生代花岗斑岩锆石 U-Pb年龄与成因探讨

doi:10.19657/j.geoscience.1000-8527.2025.023

摘要/Abstract

摘要：

与相邻的长江中下游成矿带和郯庐断裂带强烈的晚中生代岩浆活动相比,巢湖北部(巢北)地区侵入岩分布和发育有限。本文运用锆石LA-ICP-MS定年结果和全岩元素地球化学分析确定巢北地区花岗斑岩的形成时代及成因,为晚中生代区域构造演化提供新的制约。巢北花岗斑岩属于强过铝质高钾钙碱性花岗岩,由15%~30%斑晶(细粒长石、少量石英和黑云母)和70%~85%基质(微粒长石和石英或黑云母)组成。本次获得的巢北花岗斑岩三个结晶年龄为(106.0±3.7) Ma、(103.9±4.4) Ma和(97.1±4.6) Ma,属于早白垩世阿尔布期—晚白垩世塞诺曼期,与郯庐断裂带108~103 Ma高分异A型花岗岩和宁镇地区109~100 Ma埃达克岩同期或稍晚。巢北花岗斑岩为较低分异的S型花岗岩,是加厚的扬子下地壳在相对高温条件下发生部分熔融的产物,形成于古太平洋板块正向俯冲背景下的远场弧后弱拉张环境。巢北花岗斑岩Sr/Y 比值的降低以及宁镇地区埃达克岩约束下扬板块存在阿尔布期岩石圈减薄;同时,郯庐断裂带A型花岗岩及双峰式火山岩表明其是岩石圈减薄中的强减薄带。

关键词: 强过铝质花岗岩, 古太平洋板块, 白垩纪, 锆石U-Pb年龄, 巢湖北部

Abstract:

Compared with the intense Late Mesozoic magmatism in the adjacent Middle-Lower Yangtze River Metallogenic Belt and Tanlu Fault Zone, intrusive rocks in the northern Chaohu (Chaobei) area are limited in distribution and development. In this study, zircon LA-ICP-MS dating and whole-rock elemental geochemical analyses are used to determine the formation age and petrogenesis of granitic porphyries in the Chaobei area, thereby providing new constraints on the regional tectonic evolution during the Late Mesozoic. The Chaobei granitic porphyries belong to strongly peraluminous, high-K calc-alkaline granites, consisting of 15%-30% phenocrysts (fine-grained feldspar, minor quartz, and biotite) and 70%-85% matrix (micrograined feldspar and quartz or biotite). Three crystallization ages of the Chaobei granitic porphyries were obtained in this study: (106.0±3.7) Ma, (103.9±4.4) Ma, and (97.1±4.6) Ma, corresponding to the Albian (Early Cretaceous) to Cenomanian (Late Cretaceous). These porphyries are coeval with or slightly younger than the highly fractionated A-type granites (108-103 Ma) in the Tanlu Fault Zone and adakitic rocks (109-100 Ma) in the Ningzhen area. The Chaobei granitic porphyries are relatively lowly fractionated S-type granites, formed by partial melting of the thickened Lower Yangtze Block lower crust under relatively high-temperature conditions, in a far-field back-arc weak extensional setting associated with the ortho-subduction of the Paleo-Pacific Plate. The decreased Sr/Y ratio of the Chaobei granitic porphyries, combined with the adakitic rocks in the Ningzhen area, provides robust evidence for lithospheric thinning of the Lower Yangtze Block during the Albian. Moreover, the A-type granites and bimodal volcanic rocks in the Tanlu Fault Zone clearly indicate that it is an intense lithospheric thinning zone.

Key words: strongly peraluminous granite, Paleo-Pacific plate, Cretaceous, zircon U-Pb age, northernChaohu

中图分类号:

P581

王鼎, 陈玉明, 谭明赈, 胡治鑫, 李振生, 李全忠. 巢湖北部地区晚中生代花岗斑岩锆石 U-Pb年龄与成因探讨[J]. 现代地质, 2025, 39(04): 947-963.

WANG Ding, CHEN Yuming, TAN Mingzhen, HU Zhixin, LI Zhensheng, LI Quanzhong. Zircon U-Pb Ages and Petrogenesis of Late Mesozoic Granitic Porphyries in the Northern Chaohu Area[J]. Geoscience, 2025, 39(04): 947-963.

图/表 13

参考文献 51

[1]	ZHU G, LIU C, GU C C, et al. Oceanic plate subduction history in the western Pacific Ocean: Constraint from late Mesozoic evolution of the Tan-Lu Fault Zone[J]. SCIENCE CHINA (Earth Sciences), 2018, 61(4): 386-405.
[2]	LI Y X, YAN J, SONG C Z, et al. Petrogenesis of late Mesozoic granitoids from the southern segment of the Tan-Lu Fault, eastern China: implications for the tectonic affinity of the Zhangbaling Uplift[J]. International Geology Review, 2021, 63(4): 453-475.
[3]	胡生平, 韩善楚, 张洪求, 等. 庐枞盆地西湾铅锌矿床黄铁矿微量元素组成特征及成矿启示[J]. 现代地质, 2024, 38(1): 183-197.
[4]	SUN Y, MA C Q, LIU Y Y. The latest Yanshanian magmatic and metallogenic events in the middle-lower Yangtze River belt: Evidence from the Ningzhen region[J]. Chinese Science Bulletin, 2013, 58(34): 4308-4318.
[5]	薛怀民. 长江下游宁镇地区晚中生代侵入岩:同位素年龄、地球化学特征与成因探讨[J]. 地质学报, 2019, 93(1): 147-169.
[6]	LUO Z, LING M, LU W, et al. The Genesis of A-Type Granites in Lower Yangtze River Belt: Evidence From Calcium Isotopes[J]. Geochemistry, Geophysics, Geosystems, 2024, 25(6):e2023GC011347.
[7]	LING M X, WANG F Y, DING X, et al. Different origins of adakites from the Dabie Mountains and the Lower Yangtze River Belt, eastern China: geochemical constraints[J]. International Geology Review, 2011, 53(5/6): 727-740.
[8]	牛漫兰, 朱光, 谢成龙, 等. 郯庐断裂带张八岭隆起南段晚中生代侵入岩地球化学及其对岩石圈减薄的指示[J]. 岩石学报, 2010, 26(9): 2783-2804.
[9]	LUO Z B, XUE S, ZHANG L P, et al. Origin of Early Cretaceous Guandian adakitic pluton in central eastern China: partial melting of delaminated lower continental crust triggered by ridge subduction[J]. International Geology Review, 2018, 60(11/14): 1707-1720.
[10]	张舒, 张赞赞, 胡召齐, 等. 长江中下游成矿带庐枞矿集区花岗岩型铀矿床成矿作用研究进展[J]. 现代地质, 2023, 37(6): 1435-1448.
[11]	WANG T, NIU M L, WU Q, et al. Episodic bimodal magmatism at an active continental margin due to Paleo-Pacific Plate subduction: A case study from the southern segment of the Tan-Lu Fault Zone, eastern China[J]. Lithos, 2019, 328-329: 159-181.
[12]	李三忠, 李安龙, 范德江, 等. 安徽巢北地区的中生代构造变形及其大地构造背景[J]. 地质学报, 2009, 83(2): 208-217.
[13]	姜子朝, 闫峻, 贾志海, 等. 巢湖地区侵入岩锆石定年[J]. 合肥工业大学学报(自然科学版), 2014, 37(12): 1493-1498.
[14]	MCLENNAN S M. Relationships between the trace element composition of sedimentary rocks and upper continental crust[J]. Geochemistry, Geophysics, Geosystems, 2001, 2(4): 203-236.
[15]	MIDDLEMOST E A K. A simple classification of volcanic rocks[J]. Bulletin Volcanologique, 1972, 36(2): 382-397.
[16]	PECCERILLO A, TAYLOR S R. Geochemistry of eocene calc-alkaline volcanic rocks from the Kastamonu area, Northern Turkey[J]. Contributions to Mineralogy and Petrology, 1976, 58(1): 63-81.
[17]	SYLVESTER P J. Post-collisional strongly peraluminous granites[J]. Lithos, 1998, 45(1): 29-44.
[18]	CHAPPELL B W, BRYANT C J, WYBORN D. Peraluminous I-type granites[J]. Lithos, 2012, 153: 142-153.
[19]	WU F Y, LIU X C, JI W Q, et al. Highly fractionated granites: Recognition and research[J]. Science China Earth Sciences, 2017, 60(7): 1201-1219.
[20]	BOYNTON W V. Cosmochemistry of the Rare Earth Elements: Meteorite Studies[M]// HENDERSONP. Rareearth element geochemistry (Developmentsin Geochemistry, volume 2).Amstenlam; Elsevier. 1984,63-114.
[21]	董国强, 余君鹏, 吴义布, 等. 甘肃合黎山古元古代花岗岩锆石U-Pb年龄、岩石地球化学特征及其对阿拉善地块南缘构造环境的约束[J]. 地质通报, 2024, 43(10):1830-1840.
[22]	WU Y B, ZHENG Y F. Genesis of zircon and its constraints on interpretation of U-Pb age[J]. Chinese Science Bulletin, 2004, 49(15): 1554-1569.
[23]	刘建敏, 闫峻, 李全忠, 等. 宁镇地区安基山岩体锆石LA-ICPMSU-Pb定年及意义[J]. 地质论评, 2014, 60(1): 190-200.
[24]	赵枫, 李龚健, 张鹏飞, 等. 西南三江临沧花岗岩基成因与构造启示:元素地球化学、锆石U-Pb年代学及Hf同位素约束[J]. 岩石学报, 2018, 34(5): 1397-1412.
[25]	张国宾, 孔金贵, 王翠彭, 等. 大兴安岭北段呼玛地区晚石炭世花岗岩年代学和地球化学特征:对古亚洲洋构造演化的制约[J]. 现代地质, 2025, 39(1):62-82.
[26]	BONIN B, JANOUŠEK V, MOYEN J-F. Chemical variation, modal composition and classification of granitoids[J]. Geological Society, London, Special Publications, 2020, 491(1): 9-51.
[27]	CLARKE D B. Granitoid Rocks[M]. Dordrecht: Springer Science & Business Media, 1992.
[28]	CHAPPELL B W, WHITE A J R. I- and S-type granites in the Lachlan Fold Belt[J]. Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 1992, 83(1/2): 1-26.
[29]	王国辉, 王志忠, 严城民. 花岗岩成因类型划分与地球化学图解判别综述[J]. 云南地质, 2019, 38(1): 28-37.
[30]	COLLINS W J, BEAMS S D, WHITE A J R, et al. Nature and origin of A-type granites with particular reference to southeastern Australia[J]. Contributions to Mineralogy and Petrology, 1982, 80(2): 189-200.
[31]	WHALEN J, CURRIE K, CHAPPELL B. A-type granites: geochemical characteristics, discrimination and petrogenesis[J]. Contributions to Mineralogy and Petrology, 1987, 95(4): 407-419.
[32]	BONIN B. A-type granites and related rocks: Evolution of a concept, problems and prospects[J]. Lithos, 2007, 97(1): 1-29.
[33]	EL BOUSEILY A M, EL SOKKARY A A. The relation between Rb, Ba and Sr in granitic rocks[J]. Chemical Geology, 1975, 16(3): 207-219.
[34]	陈耀新, 刘文恒, 王凯兴, 等. 甘肃青山堡中牌细粒花岗岩成因与构造环境:锆石U-Pb年龄和全岩元素组成制约[J]. 现代地质, 2024, 38(1): 169-182.
[35]	吴福元, 李献华, 杨进辉, 等. 花岗岩成因研究的若干问题[J]. 岩石学报, 2007, 23(6): 1217-1238.
[36]	尹青青, 唐菊兴, 项新葵, 等. 赣北彭山还原性S型花岗岩成因及其对Sn富集的启示:来自锆石微量元素的证据[J]. 地学前缘, 2024, 31(3):133-149. DOI
[37]	BROWN M. Granite: From genesis to emplacement[J]. GSA Bulletin, 2013, 125(7/8): 1079-1113.
[38]	钟长汀, 邓晋福, 万渝生, 等. 华北克拉通北缘中段古元古代造山作用的岩浆记录:S型花岗岩地球化学特征及锆石SHRIMP年龄[J]. 地球化学, 2007, 36(6): 585-600.
[39]	MILLER C F, MCDOWELL S M, MAPES R W. Hot and cold granites? Implications of zircon saturation temperatures and preservation of inheritance[J]. Geology, 2003, 31(6): 529-532.
[40]	谢成龙, 陈娟, 刘友勤, 等. 郯庐断裂带张八岭隆起段晚中生代岩浆岩继承锆石U-Pb年代学:源区属性及构造意义[J]. 岩石学报, 2016, 32(4): 976-1000.
[41]	MAO J R, LI Z L, YE H M. Mesozoic tectono-magmatic activities in South China: Retrospect and prospect[J]. SCIENCE CHINA (Earth Sciences), 2014, 57(12): 2853-2877.
[42]	席振, 马德成, 李欢, 等. 新疆东昆仑土窑洞地区新元古代早期侵入岩年代学、地球化学及其构造意义[J]. 现代地质, 2023, 37(6): 1609-1623.
[43]	郭锋, 赵亮, 张晓兵, 等. 华南陆块东部晚中生代岩浆作用的深部动力学过程[J]. 大地构造与成矿学, 2022, 46(3): 416-434.
[44]	BAI J H, LING M X, YANG X Y, et al. Yangshan A-Type Granites in the Lower Yangtze River Belt Formed by Ridge Subduction: Radiogenic Ca and Nd Isotopic Constraints[J]. Journal of Earth Science, 2022, 33(3): 581-590.
[45]	LING M X, WANG F Y, DING X, et al. Cretaceous Ridge Subduction Along the Lower Yangtze River Belt, Eastern China[J]. Economic Geology, 2009, 104(2): 303-321.
[46]	巫建华, 郭国林, 郭佳磊, 等. 中国东部中生代岩浆岩的时空分布及其与热液型铀矿的关系[J]. 岩石学报, 2017, 33(5): 1591-1614.
[47]	SUN W, 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): 533-542.
[48]	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.
[49]	HARRIS N B W, PEARCE J A, TINDLE A G. Geochemical characteristics of collision-zone magmatism[J]. Geological Society, London, Special Publications, 1986, 19(1): 67-81.
[50]	BATCHELOR R A, BOWDEN P. Petrogenetic interpretation of granitoid rock series using multicationic parameters[J]. Chemical Geology, 1985, 48(1): 43-55.
[51]	CASTILLO P R. An overview of adakite petrogenesis[J]. Chinese Science Bulletin, 2006, 51(3): 257-268.

采样位置	样号	岩性	岩性特征
马脊山	MJS1 MJS3	青灰色弱风化花岗斑岩	斑晶约占30%,粒径0.5~1.5 mm,主要是长石、石英和黑云母,长石斑晶部分粘土化;基质约占70%,粒径~0.06 mm左右,主要是长石和石英。
马脊山	MJS2	灰白色强风化花岗斑岩	斑晶约占15%,粒径~0.5 mm,主要是长石、石英和黑云母,长石斑晶全部粘土化和碳酸盐岩化;基质约占85%,粒径~0.04 mm左右,主要是长石和黑云母。
向核山南坡	XHS2	灰色半风化花岗斑岩	斑晶约占25%,粒径0.5~2 mm,主要是长石、石英和黑云母,长石斑晶全部碳酸盐岩化及粘土化;基质约占75%,粒径~0.03 mm左右,主要是粘土化长石和石英。
向核山南坡	XHS3	灰色半风化花岗斑岩	斑晶约占35%,粒径~1 mm,主要是长石、石英和黑云母,长石环带和双晶清晰;基质约占85%,粒径~0.07mm左右,主要是长石和黑云母。

采样位置	样号	岩性	岩性特征
马脊山	MJS1 MJS3	青灰色弱风化花岗斑岩	斑晶约占30%,粒径0.5~1.5 mm,主要是长石、石英和黑云母,长石斑晶部分粘土化;基质约占70%,粒径~0.06 mm左右,主要是长石和石英。
马脊山	MJS2	灰白色强风化花岗斑岩	斑晶约占15%,粒径~0.5 mm,主要是长石、石英和黑云母,长石斑晶全部粘土化和碳酸盐岩化;基质约占85%,粒径~0.04 mm左右,主要是长石和黑云母。
向核山南坡	XHS2	灰色半风化花岗斑岩	斑晶约占25%,粒径0.5~2 mm,主要是长石、石英和黑云母,长石斑晶全部碳酸盐岩化及粘土化;基质约占75%,粒径~0.03 mm左右,主要是粘土化长石和石英。
向核山南坡	XHS3	灰色半风化花岗斑岩	斑晶约占35%,粒径~1 mm,主要是长石、石英和黑云母,长石环带和双晶清晰;基质约占85%,粒径~0.07mm左右,主要是长石和黑云母。

项目	单位	MJS1(%)	MJS3(%)	XHS3(%)	项目	单位	MJS1(μg/g)	MJS3(μg/g)	XHS3(μg/g)
SiO₂	%	69.51	70.26	69.76	Cs	μg/g	1.50	2.81	1.56
TiO₂	%	0.28	0.28	0.31	Rb	μg/g	102.5	94.4	57.3
Al₂O₃	%	14.10	14.34	15.42	Ba	μg/g	1610	1545	1775
Fe₂O₃	%	2.19	2.44	2.05	Th	μg/g	6.67	6.62	6.88
MnO	%	0.02	0.03	0.01	U	μg/g	0.94	0.91	0.86
MgO	%	1.82	1.49	0.73	Nb	μg/g	12.4	12.2	12.6
CaO	%	1.58	1.62	1.94	Ta	μg/g	0.78	0.79	1.19
Na₂O	%	1.82	2.13	3.28	K	%	3.58	3.45	3.30
K₂O	%	4.62	4.45	4.17	Pb	μg/g	17.8	17.4	20.0
P₂O₅	%	0.10	0.10	0.11	Sr	μg/g	130.0	188.0	492
LOI	%	3.62	2.99	1.88	P	μg/g	510	510	570
La	μg/g	45.3	45.8	55.9	Zr	μg/g	221	229	235
Ce	μg/g	78.9	79.5	93.5	Hf	μg/g	5.2	5.5	5.3
Pr	μg/g	8.05	7.92	9.39	Ti	%	0.162	0.166	0.182
Nd	μg/g	25.5	26.0	30.0	Y	μg/g	8.4	7.9	8.9
Sm	μg/g	3.60	3.64	4.11	Ga	μg/g	18.05	17.40	18.75
Eu	μg/g	0.83	0.79	0.89	R₁		2957	2896	2502
Gd	μg/g	2.47	2.32	2.53	R₂		558	544	559
Tb	μg/g	0.30	0.31	0.34	A/CNK(ASI)		1.30	1.27	1.15
Dy	μg/g	1.59	1.47	1.68	A/NK		1.76	1.72	1.56
Ho	μg/g	0.29	0.28	0.31	M		1.13	1.15	1.30
Er	μg/g	0.81	0.79	0.83	T_Zr	℃	837	838	828
Tm	μg/g	0.12	0.11	0.11	Ce^*		0.99	1.00	0.98
Yb	μg/g	0.71	0.69	0.71	Eu^*		0.85	0.83	0.84
Lu	μg/g	0.12	0.10	0.11	10000Ga/Al		2.63	2.48	2.46

项目	单位	MJS1(%)	MJS3(%)	XHS3(%)	项目	单位	MJS1(μg/g)	MJS3(μg/g)	XHS3(μg/g)
SiO₂	%	69.51	70.26	69.76	Cs	μg/g	1.50	2.81	1.56
TiO₂	%	0.28	0.28	0.31	Rb	μg/g	102.5	94.4	57.3
Al₂O₃	%	14.10	14.34	15.42	Ba	μg/g	1610	1545	1775
Fe₂O₃	%	2.19	2.44	2.05	Th	μg/g	6.67	6.62	6.88
MnO	%	0.02	0.03	0.01	U	μg/g	0.94	0.91	0.86
MgO	%	1.82	1.49	0.73	Nb	μg/g	12.4	12.2	12.6
CaO	%	1.58	1.62	1.94	Ta	μg/g	0.78	0.79	1.19
Na₂O	%	1.82	2.13	3.28	K	%	3.58	3.45	3.30
K₂O	%	4.62	4.45	4.17	Pb	μg/g	17.8	17.4	20.0
P₂O₅	%	0.10	0.10	0.11	Sr	μg/g	130.0	188.0	492
LOI	%	3.62	2.99	1.88	P	μg/g	510	510	570
La	μg/g	45.3	45.8	55.9	Zr	μg/g	221	229	235
Ce	μg/g	78.9	79.5	93.5	Hf	μg/g	5.2	5.5	5.3
Pr	μg/g	8.05	7.92	9.39	Ti	%	0.162	0.166	0.182
Nd	μg/g	25.5	26.0	30.0	Y	μg/g	8.4	7.9	8.9
Sm	μg/g	3.60	3.64	4.11	Ga	μg/g	18.05	17.40	18.75
Eu	μg/g	0.83	0.79	0.89	R₁		2957	2896	2502
Gd	μg/g	2.47	2.32	2.53	R₂		558	544	559
Tb	μg/g	0.30	0.31	0.34	A/CNK(ASI)		1.30	1.27	1.15
Dy	μg/g	1.59	1.47	1.68	A/NK		1.76	1.72	1.56
Ho	μg/g	0.29	0.28	0.31	M		1.13	1.15	1.30
Er	μg/g	0.81	0.79	0.83	T_Zr	℃	837	838	828
Tm	μg/g	0.12	0.11	0.11	Ce^*		0.99	1.00	0.98
Yb	μg/g	0.71	0.69	0.71	Eu^*		0.85	0.83	0.84
Lu	μg/g	0.12	0.10	0.11	10000Ga/Al		2.63	2.48	2.46

点号	Th	U	Th/U	²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		rho	²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		谐和度 (%)
	μg/g	μg/g		比例	1σ	比例	1σ		年龄 (Ma)	1σ	年龄 (Ma)	1σ
	MJS1 (马脊山, GPS: 31°38'21.51″; E117°52'13.30″)
MJS1-01	39.9	129		比例	1σ	比例	1σ		年龄 (Ma)	1σ	年龄 (Ma)	1σ		0.31	0.1641	0.0245	0.0141	0.0008	0.3510	154	21	90	5	47
MJS1-02	212	122	1.74	0.1345	0.0144	0.0161	0.0008	0.4450	128	13	103	5	78
MJS1-03	118	74.9	1.57	0.2030	0.0310	0.0133	0.0011	0.5350	188	26	85	7	24
MJS1-04	113	62.6	1.80	0.3676	0.0503	0.0165	0.0010	0.4350	318	37	105	6	-1
MJS1-05	116	62.8	1.84	0.5571	0.0656	0.0202	0.0011	0.4610	450	43	129	7	-11
MJS1-06	194	91.9	2.11	0.6845	0.0832	0.0183	0.0011	0.4851	529	50	117	7	-28
MJS1-07	1.40	308	0.00	0.1629	0.0104	0.0156	0.0005	0.5326	153	9	100	3	57
MJS1-08	64.4	67.1	0.96	0.1083	0.0172	0.0146	0.0007	0.2866	104	16	93	4	88
MJS1-09	65.1	73.6	0.88	0.4006	0.0599	0.0174	0.0010	0.3797	342	43	111	6	-2
MJS1-10	377	234	1.61	0.7722	0.0995	0.0222	0.0013	0.4393	581	57	141	8	-22
MJS1-11	97.4	225	0.43	1.3330	0.0894	0.1368	0.0070	0.7665	860	39	826	40	95
MJS1-12	118	250	0.47	1.1838	0.0835	0.1316	0.0058	0.6237	793	39	797	33	99
MJS1-13	55.8	153	0.37	3.2401	0.3032	0.2534	0.0141	0.5947	1467	73	1456	73	99
MJS1-14	158	188	0.84	0.3927	0.0722	0.0185	0.0029	0.8407	336	53	118	18	4
MJS1-16	232	708	0.33	1.2143	0.1007	0.1080	0.0045	0.4997	807	46	661	26	80
MJS1-17	174	114	1.53	0.3505	0.0682	0.0236	0.0017	0.3656	305	51	150	11	31
MJS1-18	69.9	60.4	1.16	0.1899	0.0414	0.0169	0.0015	0.4204	177	35	108	10	51
MJS1-19	180	264	0.68	1.3451	0.0574	0.1434	0.0043	0.6966	865	25	864	24	99
MJS1-20	80.5	99.6	0.81	0.3028	0.0463	0.0190	0.0013	0.4359	269	36	121	8	24
MJS1-21	276	111	2.50	0.1011	0.0125	0.0161	0.0008	0.4233	98	12	103	5	95
MJS1-22	140	88.6	1.58	1.7836	0.2747	0.0296	0.0034	0.7414	1040	100	188	21	-39
MJS1-23	159	80.0	1.99	0.1082	0.0136	0.0164	0.0009	0.4173	104	13	105	5	99
MJS1-24	249	372	0.67	1.4254	0.0696	0.1546	0.0050	0.6590	900	29	927	28	97
MJS1-25	328	155	2.11	0.1606	0.0144	0.0166	0.0008	0.5104	151	13	106	5	64
MJS1-26	186	102	1.83	0.5000	0.0768	0.0184	0.0012	0.4334	412	52	117	8	-12
MJS1-27	216	104	2.07	0.3448	0.0629	0.0170	0.0010	0.3174	301	47	109	6	6
MJS1-28	341	533	0.64	10.0890	0.3445	0.4625	0.0130	0.8254	2443	32	2451	57	99
MJS1-29	111	198	0.56	1.2507	0.0517	0.1416	0.0041	0.7004	824	23	854	23	96
MJS1-30	41.3	29.5	1.40	0.2502	0.0375	0.0206	0.0014	0.4542	227	30	131	9	46
MJS1-31	99.9	134	0.74	1.5599	0.0745	0.1562	0.0047	0.6289	954	30	936	26	98
MJS1-32	421	198	2.13	0.1613	0.0150	0.0165	0.0007	0.4897	152	13	105	5	63
MJS1-33	331	411	0.81	1.3094	0.0498	0.1418	0.0041	0.7624	850	22	855	23	99
MJS1-34	317	237	1.34	0.2417	0.0170	0.0146	0.0007	0.6568	220	14	93	4	19
MJS1-35	158	470	0.34	9.3187	0.3125	0.4470	0.0128	0.8506	2370	31	2382	57	99
MJS1-36	103	59.3	1.74	0.5912	0.0435	0.0199	0.0010	0.6665	472	28	127	6	-15
MJS1-37	247	126	1.96	0.1697	0.0192	0.0170	0.0007	0.3798	159	17	109	5	62
MJS1-38	48.0	2889	0.02	4.5771	0.1530	0.2801	0.0079	0.8461	1745	28	1592	40	90
MJS1-39	83.2	46.9	1.77	0.8321	0.1436	0.0210	0.0013	0.3580	615	80	134	8	-29
MJS1-40	28.7	98.8	0.29	4.3474	0.1725	0.2537	0.0078	0.7774	1702	33	1457	40	84
MJS1-41	139	156	0.89	1.1492	0.0430	0.1105	0.0035	0.8357	777	20	675	20	86
MJS1-42	69.6	56.0	1.24	0.5077	0.0402	0.0187	0.0008	0.5328	417	27	120	5	-11
MJS1-43	141	45.1	3.13	1.1436	0.1011	0.0255	0.0013	0.5728	774	48	162	8	-31
MJS1-44	161	82.7	1.95	0.2798	0.0241	0.0167	0.0007	0.4544	250	19	106	4	19
MJS1-45	114	68.9	1.66	0.3890	0.0393	0.0169	0.0009	0.5013	334	29	108	5	-3
MJS1-46	66.4	60.5	1.10	0.0909	0.0127	0.0146	0.0006	0.3046	88	12	93	4	94
MJS1-47	225	103	2.18	0.2056	0.0256	0.0172	0.0008	0.3627	190	22	110	5	46
MJS1-48	136	84.1	1.61	0.2183	0.0183	0.0150	0.0005	0.4174	200	15	96	3	29
MJS1-49	94.2	77.7	1.21	0.2549	0.0265	0.0170	0.0007	0.4050	231	21	109	5	28
MJS1-50	138	74.3	1.86	1.5439	0.1082	0.0285	0.0013	0.6395	948	43	181	8	-36
MJS1-51	114	81.3	1.41	0.3728	0.0307	0.0174	0.0007	0.4926	322	23	111	4	2
MJS1-52	76.9	55.5	1.39	0.6765	0.0601	0.0189	0.0009	0.5201	525	36	121	6	-26
MJS1-53	95.7	67.6	1.41	1.6108	0.0844	0.0272	0.0011	0.7843	974	33	173	7	-40
MJS1-54	268	122	2.20	0.1795	0.0133	0.0155	0.0006	0.5023	168	11	99	4	48
MJS1-55	61.2	47.8	1.28	0.2149	0.0292	0.0157	0.0008	0.3572	198	24	100	5	34
MJS1-56	91.1	64.3	1.42	1.5957	0.0904	0.0282	0.0012	0.7587	969	35	179	8	-38
MJS2 (马脊山, GPS: 31°38'21.51″; E117°52'13.30″)
MJS2-01	619	1120	0.55	1.0239	0.0343	0.1117	0.0030	0.8150	716	17	683	18	95
MJS2-02	107	67.5	1.59	0.2105	0.0241	0.0161	0.0008	0.4494	194	20	103	5	38
MJS2-03	62.9	34.2	1.84	5.7043	0.2586	0.3455	0.0111	0.7077	1932	39	1913	53	99
MJS2-04	421	164	2.57	0.2052	0.0227	0.0126	0.0009	0.6550	190	19	81	6	19
MJS2-05	161	101	1.60	0.1911	0.0283	0.0170	0.0008	0.3200	178	24	109	5	51
MJS2-06	1449	2244	0.65	0.3766	0.0170	0.0356	0.0012	0.7597	325	13	226	8	64
MJS2-07	1871	1786	1.05	1.2222	0.0412	0.1290	0.0036	0.8235	811	19	782	20	96
MJS2-08	240	494	0.49	1.6106	0.0614	0.1563	0.0046	0.7686	974	24	936	26	95
MJS2-10	89.6	59.4	1.51	0.8602	0.0797	0.0197	0.0012	0.6789	630	43	125	8	-34
MJS2-11	79.4	54.7	1.45	0.4564	0.0689	0.0163	0.0014	0.5566	382	48	104	9	-15
MJS2-12	768	1801	0.43	1.0012	0.0426	0.1016	0.0034	0.7843	704	22	624	20	87
MJS2-13	186	112	1.67	0.6444	0.0958	0.0181	0.0014	0.5183	505	59	115	9	-26
MJS2-14	2168	2028	1.07	0.3912	0.0228	0.0397	0.0015	0.6534	335	17	251	9	71
MJS2-15	137	84.3	1.62	0.2406	0.0270	0.0160	0.0011	0.5944	219	22	102	7	27
MJS2-16	20.7	39.8	0.52	1.3106	0.1138	0.1460	0.0053	0.4208	850	50	878	30	96
MJS2-17	61.7	53.6	1.15	0.2366	0.0319	0.0175	0.0011	0.4663	216	26	112	7	36
MJS2-18	212	185	1.14	0.2460	0.0366	0.0164	0.0010	0.4023	223	30	105	6	27
MJS2-19	246	115	2.13	0.1256	0.0208	0.0134	0.0007	0.3030	120	19	86	4	67
MJS2-20	84.2	291	0.29	1.1521	0.0673	0.1350	0.0058	0.7380	778	32	816	33	95
MJS2-21	382	1352	0.28	0.2889	0.0160	0.0384	0.0015	0.7250	258	13	243	10	94
MJS2-22	270	318	0.85	9.4692	0.3211	0.4513	0.0132	0.8601	2385	31	2401	58	99
MJS2-23	247	440	0.56	1.1030	0.0625	0.1197	0.0062	0.9149	755	30	729	36	96
MJS2-24	67.3	54.9	1.22	0.2509	0.0387	0.0213	0.0014	0.4368	227	31	136	9	49
MJS2-26	73.1	74.2	0.99	0.3368	0.0542	0.0170	0.0012	0.4339	295	41	109	8	7
MJS2-27	2687	2631	1.02	0.4015	0.0254	0.0289	0.0012	0.6544	343	18	184	8	39
MJS2-28	48.6	72.0	0.68	1.4242	0.0847	0.1521	0.0049	0.5398	899	35	913	27	98
MJS2-29	59.2	52.7	1.12	0.4309	0.0777	0.0171	0.0013	0.4147	364	55	109	8	-8
MJS2-30	57.6	88.0	0.65	1.4370	0.0818	0.1564	0.0050	0.5607	904	34	937	28	96
MJS2-31	1254	1765	0.71	0.5073	0.0202	0.0554	0.0017	0.7707	417	14	348	10	81
MJS2-33	413	2720	0.15	0.1947	0.0124	0.0258	0.0012	0.7230	181	11	164	7	90
MJS2-35	295	1255	0.23	5.9728	0.3726	0.2984	0.0175	0.9386	1972	54	1683	87	84
MJS2-36	32.4	40.0	0.81	1.9744	0.4067	0.0475	0.0066	0.6741	1107	139	299	41	-15
MJS2-37	173	131	1.32	0.3733	0.0559	0.0170	0.0016	0.6294	322	41	109	10	1
MJS2-38	88.1	82.1	1.07	0.8060	0.1138	0.0172	0.0017	0.6957	600	64	110	11	-39
MJS2-39	49.9	53.8	0.93	1.8502	0.5916	0.0465	0.0102	0.6832	1064	211	293	63	-14
MJS2-40	172	120	1.44	0.1565	0.0167	0.0170	0.0008	0.4646	148	15	109	5	69
MJS2-41	73.4	55.7	1.32	3.0716	0.3355	0.0398	0.0032	0.7284	1426	84	252	20	-40
MJS2-42	113	76.0	1.49	0.2898	0.0274	0.0163	0.0007	0.4407	258	22	104	4	14
MJS2-43	123	48.2	2.56	1.8676	0.2755	0.0345	0.0029	0.5757	1070	98	218	18	-33
MJS2-44	74.8	58.4	1.28	0.1424	0.0149	0.0154	0.0007	0.4435	135	13	99	5	68
MJS2-45	187	112	1.67	1.2328	0.0487	0.1448	0.0040	0.6916	816	22	872	22	93
MJS2-46	292	278	1.05	1.2332	0.0388	0.1341	0.0037	0.8820	816	18	811	21	99
MJS2-47	316	252	1.25	1.3348	0.0432	0.1437	0.0039	0.8323	861	19	866	22	99
MJS2-48	70.2	52.0	1.35	0.3528	0.0250	0.0173	0.0008	0.6649	307	19	110	5	5
MJS2-49	51.1	45.3	1.13	0.2009	0.0212	0.0160	0.0008	0.4471	186	18	102	5	41
MJS2-50	78.4	74.0	1.06	0.3824	0.0261	0.0164	0.0007	0.6084	329	19	105	4	-4
MJS2-51	84.3	91.9	0.92	0.3858	0.0496	0.0198	0.0010	0.4086	331	36	126	7	10
MJS2-52	143	179	0.80	0.9318	0.0424	0.0997	0.0029	0.6448	669	22	612	17	91
MJS2-53	107	83.4	1.29	0.9195	0.1921	0.0212	0.0025	0.5613	662	102	135	16	-33
MJS2-54	182	154	1.18	0.2028	0.0275	0.0173	0.0008	0.3618	188	23	110	5	48
MJS2-55	101	60.3	1.68	0.9474	0.1023	0.0248	0.0016	0.5927	677	53	158	10	-25
MJS2-56	91.6	70.3	1.30	0.3993	0.0412	0.0173	0.0010	0.5423	341	30	111	6	-3
XHS2 (向核山南坡, GPS: 31°40'46.51″; E117°50'36.57″)
XHS2-01	321	181	1.77	0.2175	0.0295	0.0153	0.0008	0.3901	200	25	98	5	31
XHS2-02	56.0	297	0.19	0.1271	0.0096	0.0175	0.0006	0.4300	121	9	112	4	91
XHS2-03	366	339	1.08	1.0247	0.0643	0.1293	0.0049	0.6070	716	32	784	28	90
XHS2-04	172	97.4	1.77	0.1088	0.0113	0.0164	0.0007	0.3964	105	10	105	4	99
XHS2-05	146	84.9	1.72	0.3934	0.0669	0.0158	0.0012	0.4509	337	49	101	8	-8
XHS2-06	2927	3045	0.96	0.7190	0.0439	0.0806	0.0046	0.9268	550	26	500	27	90
XHS2-07	202	701	0.29	1.0071	0.0497	0.1045	0.0047	0.9065	707	25	641	27	90
XHS2-08	170	131	1.30	0.4198	0.0540	0.0126	0.0010	0.6361	356	39	80	7	-27
XHS2-09	83.7	140	0.60	4.2314	0.2153	0.2493	0.0091	0.7133	1680	42	1435	47	84
XHS2-10	63.1	60.9	1.04	0.7145	0.1272	0.0235	0.0025	0.6018	547	75	150	16	-15
XHS2-11	70.8	61.9	1.14	0.3267	0.0793	0.0161	0.0011	0.2788	287	61	103	7	5
XHS2-12	54.2	57.1	0.95	0.1978	0.0309	0.0176	0.0012	0.4285	183	26	112	7	51
XHS2-13	345	579	0.60	1.2627	0.0566	0.1376	0.0046	0.7435	829	25	831	26	99
XHS2-14	79.3	71.7	1.11	0.2270	0.0438	0.0130	0.0009	0.3696	208	36	83	6	14
XHS2-15	312	254	1.23	1.3651	0.0675	0.1404	0.0044	0.6332	874	29	847	25	96
XHS2-16	130	131	1.00	1.3025	0.0801	0.1367	0.0042	0.4991	847	35	826	24	97
XHS2-17	198	275	0.72	7.1593	0.2446	0.3331	0.0096	0.8479	2131	30	1853	47	86
XHS2-18	230	449	0.51	0.1133	0.0069	0.0173	0.0005	0.5075	109	6	111	3	98
XHS2-19	101	201	0.50	1.2685	0.0593	0.1326	0.0046	0.7476	832	27	803	26	96
XHS2-20	220	331	0.67	1.1818	0.0505	0.1355	0.0040	0.6870	792	24	819	23	96
XHS2-21	93.7	940	0.10	4.9467	0.1667	0.2891	0.0086	0.8788	1810	28	1637	43	89
XHS2-22	94.7	154	0.62	1.3617	0.0703	0.1359	0.0042	0.6021	873	30	821	24	93
XHS2-23	516	1414	0.36	0.8242	0.0444	0.0767	0.0036	0.8694	610	25	476	21	75
XHS2-24	50.5	51.6	0.98	0.7983	0.2211	0.0176	0.0021	0.4280	596	125	113	13	-37
XHS2-25	166	147	1.13	0.3882	0.0781	0.0150	0.0010	0.3480	333	57	96	7	-11
XHS2-26	284	503	0.57	0.9429	0.0588	0.0999	0.0052	0.8288	674	31	614	30	90
XHS2-27	45.9	67.8	0.68	0.4698	0.0778	0.0144	0.0012	0.5127	391	54	92	8	-24
XHS2-28	250	138	1.80	0.3236	0.0588	0.0159	0.0009	0.3026	285	45	102	6	5
XHS2-29	16604	10800	1.54	0.1277	0.0075	0.0139	0.0005	0.6530	122	7	89	3	68
XHS2-30	444	360	1.23	1.4073	0.0987	0.1352	0.0060	0.6317	892	42	817	34	91
XHS2-41	58.4	46.4	1.26	0.2751	0.0233	0.0152	0.0007	0.5644	247	19	97	5	12
XHS2-42	89.7	76.3	1.18	0.3364	0.0293	0.0170	0.0006	0.4392	294	22	109	4	7
XHS2-43	79.1	64.3	1.23	0.2362	0.0168	0.0160	0.0006	0.5300	215	14	102	4	28
XHS2-44	68.8	81.4	0.85	0.0933	0.0120	0.0150	0.0006	0.2908	91	11	96	4	94
XHS2-45	56.4	51.1	1.10	0.1615	0.0177	0.0163	0.0007	0.3919	152	15	104	4	62
XHS2-46	162	178	0.91	1.3464	0.0458	0.1410	0.0038	0.8002	866	20	850	22	98
XHS2-47	71.9	46.7	1.54	0.2669	0.0240	0.0162	0.0007	0.4624	240	19	104	4	20
XHS2-48	153	182	0.84	1.3558	0.0471	0.1337	0.0037	0.7893	870	20	809	21	92
XHS2-49	350	415	0.84	1.1808	0.0410	0.1259	0.0034	0.7885	792	19	764	20	96
XHS2-50	67.7	57.4	1.18	0.2220	0.0214	0.0158	0.0006	0.4232	204	18	101	4	32
XHS2-51	45.0	40.0	1.13	1.3322	0.2838	0.0309	0.0030	0.4622	860	124	196	19	-26
XHS2-52	89.4	81.7	1.09	0.2364	0.0203	0.0144	0.0005	0.4148	215	17	92	3	19
XHS2-53	81.8	75.0	1.09	0.2252	0.0180	0.0159	0.0006	0.4388	206	15	102	4	32
XHS2-54	268	153	1.75	0.1666	0.0120	0.0158	0.0006	0.4861	156	10	101	4	57
XHS2-55	206	93.4	2.20	0.1449	0.0128	0.0167	0.0007	0.4791	137	11	107	4	75
XHS2-56	341	213	1.60	0.2150	0.0130	0.0169	0.0006	0.5423	198	11	108	4	41