An Upper Miocene “Hipparion fauna” locality sandwiched by basalt in Hanjiaying, Nei Mongol

doi:10.19615/j.cnki.1000-3118.210323

Abstract

Abstract:

Here we report a Hipparion fauna locality discovered in between two basalt layers near Hanjiaying Village, Jining District, Wulanchabu City, Nei Mongol. K-Ar isotopic dating of the lower and upper level of the basalt constrains the age of the fauna from 7.2 to 6.8 Ma. Compared with classical Hipparion fauna from northern China, the Hanjiaying fauna is closer to those from Baode of Shanxi, Siziwang Banner of Nei Mongol and the Linxia Basin of Gansu. It is similar to the Loc. 43, 44 and 49 from Baode by faunal composition, confirming their age to be ~7.0 Ma rather than 5.5 Ma. The high similarity with the fossils from Wulanhua, Siziwang Banner, Nei Mongol, verified the age of Wulanhua fauna at about 7 Ma. Compared with faunas from the Linxia Basin, Gansu, it is more similar to those from the upper part of the Liushu Formation, especially the Yangjiashan fauna. Based on the faunal composition and their tooth morphology, the Hanjiaying fauna could be included in the “Gazella dorcadoides” fauna, which is supposed to be at the west paleobiome in northern China during the Late Miocene.

Key words: Nei Mongol, Jining District, Late Miocene, Hipparion fauna, K-Ar dating

摘要：

内蒙古乌兰察布市集宁区韩家营村附近发现了一处夹在两层玄武岩之间的三趾马动物群化石地点。通过K-Ar同位素测年,确定了上、下两层玄武岩的年代分别为6.8和7.2 Ma。与中国北方其他三趾马动物群相比,韩家营三趾马动物群与山西保德、内蒙古四子王旗以及甘肃临夏盆地的三趾马动物群非常相似。保德第43、44、49地点与韩家营的动物群组成类似,表明这几个地点的时代约为7.0 Ma而不是5.5 Ma。内蒙古四子王旗乌兰花地点与韩家营的化石类群也十分相像,证实了该动物群年龄约为7 Ma。对比甘肃临夏盆地的动物群,柳树组上部的杨家山三趾马动物群与韩家营的更接近。韩家营动物群的组成和牙齿结构表明其属于中国晚中新世的西部生物区系Gazella dorcadoides动物群。

关键词: 内蒙古, 集宁区, 晚中新世, 三趾马动物群, K-Ar测年

CLC Number:

Q915.873

WANG Qian, LIU Yan, WANG Li-Hua, Mikael FORTELIUS, ZHANG Zhao-Qun. An Upper Miocene “Hipparion fauna” locality sandwiched by basalt in Hanjiaying, Nei Mongol. Vertebrata Palasiatica, 2021, 59(2): 125-137.

王倩, 刘艳, 王李花, 傅明楷, 张兆群. 2021, 59(2): 125-137, 内蒙古韩家营玄武岩夹层中三趾马动物群化石. 古脊椎动物学报.

Figures/Tables 10

References 24

[1]	Bernor R L, Qiu Z X, Hayek L A C, 1990. Systematic revision of Chinese Hipparion species described by Sefve, 1927. Am Muse Novit, 2984:1-60
[2]	Chen G F, 2005. Dorcadoryx Teilhard et Trassaert, 1938 (Bovidae, Artiodactyla) from the Bahe Formation of Lantian, Shaanxi Province, China. Vert PalAsiat, 43(4):272-282
[3]	Chen G F, Zhang Z Q, 2009. Taxonomy and evolutionary process of Neogene Bovidae from China. Vert PalAsiat, 47(4):265-281
[4]	Deng T, Wang X M, Ni X J et al., 2004a. Cenozoic stratigraphic sequence of the Linxia Basin in Gansu, China and its evidence from mammal fossils. Vert PalAsiat, 42(1):45-66
[5]	Deng T, Wang W M, Yue L P et al., 2004b. New advances in the establishment of the Neogene Baode stage. J Stratigr, 28:41-47
[6]	Deng T, Liang Z, Wang S Q et al., 2011. Discovery of a Late Miocene mammalian fauna from Siziwang Banner, Inner Mongolia, and its paleozoogeographical significance. Chinese Sci Bull, 56:526-534 DOI URL
[7]	Deng T, Qiu Z X, Wang B Y et al., 2013. Late Cenozoic biostratigraphy of the Linxia Basin, northwestern China. In: Wang X M, Flynn L J, Fortelius M eds. Fossil Mammals of Asia: Neogene Biostratigraphy and Chronology. New York: Columbia University Press. 243-273
[8]	Kaakinen A, Passey B H, Zhang Z Q et al., 2013. Stratigraphy and Paleoecology of the classical dragon bone localities of Baode County, Shaanxi Province. In: Wang X M, Flynn L J, Fortelius M eds. Fossil Mammals of Asia: Neogene Biostratigraphy and Chronology. New York: Columbia University Press. 203-217
[9]	Kurtén B, 1952. The Chinese Hipparion fauna. Soc Sci Fenn, Comment Biol, 13:1-82
[10]	Liu J Y, 2004. Review on the systematic and functional studies of saber-toothed Felids. In: Dong W ed. Proceedings of the 9th Annual Meeting of the Chinese Society of Vertebrate Paleontology. Beijing: China Ocean Press. 55-68
[11]	Liu T S, Li C K, Zhai R J, 1978. Pliocene vertebrates of Lantian, Shensi. Tertiary mammalian fauna of the Lantian District, Shensi. Prof Pap Stratigr Paleont, 7:149-200
[12]	Liu Y, 2013. Late Miocene Hipparionine fossils from Lantian, Shaanxi Province and phylogenetic analysis on Chinese Hipparionines. Ph. D thesis. Beijing: University of Chinese Academy of Sciences. 1-130
[13]	Passey B, Ayliffe L K, Kaakinen A et al., 2009. Strengthened East Asian summer monsoons during a period of high-latitude warmth? Isotopic evidence from Mio-Pliocene fossil mammals and soil carbonates from northern China. Earth Planet Sci Lett, 277:443-452 DOI URL
[14]	Qiu Z D, Li C K, 2004. The evolution of mammal fauna in China and the uplift of Qinghai-Xizang Plateau. Sci China Ser D -Earth Sci, 34:845-854
[15]	Schlosser M, 1924. Tertiary vertebrates from Mongolia. Palaeont Sin Ser C, 1:1-119
[16]	Steininger F F, 1999. Chronostratigraphy, geochronology and biochronology of the Miocene “European Land Mammal Mega-Zones” (ELMMZ) and the Miocene “Mammal-Zones (MN-Zones)”. In: Rössner G E, Heissig K eds. The Miocene Land Mammals of Europe. München: Verlag Dr. Friedrich Pfeil. 9-24
[17]	Tedford R H, Flynn L J, Qiu Z X et al., 1991. Yushe Basin, China: paleomagnetically calibrated mammalian biostratigraphic standard for the Late Neogene of eastern Asia. J Vert Paleont, 11:519-526 DOI URL
[18]	Tong Y S, Zheng S H, Qiu Z D, 1996. Evolution of Cenozoic mammalian faunal regions of China. Vert PalAsiat, 34(3):215-227
[19]	Xue X X, Zhang Y X, Yue L P, 1995. Discovery and chronological division of the Hipparion fauna in Laogaochuan Village, Fugu County, Shaanxi. Chinese Sci Bull, 40:926-929
[20]	Xue X X, Zhang Y X, Yue L P, 2006. Paleoenvironments indicated by the fossil mammalian assemblages from red clay-loess sequence in the Chinese Loess Plateau since 8.0 Ma B.P. Sci China Ser D-Earth Sci, 49:518-530 DOI URL
[21]	Zhang Z Q, 2006. Chinese late Neogene land mammal community and the environmental changes of east Asia. Vert PalAsiat, 44(2):133-142
[22]	Zhang Z Q, Gentry A W, Kaakinen A et al., 2002. Land mammal faunal sequence of the Late Miocene of China: new evidence from Lantian, Shaanxi Province. Vert PalAsiat, 40(3):165-176
[23]	Zhang Z Q, Deng T, Qiu Z D, 2006. Regulation of Chinese Neogene mammalian evolution. In: Rong J Y, Fang Z J, Zhou Z H eds. Originations, Radiations and Biodiversity Changes - Evidences from the Chinese Fossil Record. Beijing: Science Press. 757-768
[24]	Zhang Z Q, Kaakinen A, Liu L P et al., 2013. Mammalian Biochronology of the Late Miocene Bahe Formation. In: Wang X M, Flynn L J, Fortelius M eds. Fossil Mammals of Asia: Neogene Biostratigraphy and Chronology. New York: Columbia University Press. 187-202

Sample number	K (%)	Sample weight (mg)	⁴⁰Ar (10^-11mol/g)	³⁸Ar (10^-14mol)	⁴⁰Ar/³⁸Ar	³⁸Ar/³⁶Ar	Age (Ma)
HJY-01	1.60	31.40	2.014	8.087	11.22	86.31	7.24±0.19
HJY-02	1.11	33.50	1.322	8.095	8.661	92.14	6.85±0.21

Sample number	K (%)	Sample weight (mg)	⁴⁰Ar (10^-11mol/g)	³⁸Ar (10^-14mol)	⁴⁰Ar/³⁸Ar	³⁸Ar/³⁶Ar	Age (Ma)
HJY-01	1.60	31.40	2.014	8.087	11.22	86.31	7.24±0.19
HJY-02	1.11	33.50	1.322	8.095	8.661	92.14	6.85±0.21

		V 27534.4		V 27534.5		V 27534.6		V 27534.30
		L	W	L	W	L	W	L	W
P2		27.7	20.8	26.6	19.7
P2	Pr	5.7	4.0	8.4	5.8
P3		22.7	22.1	19.4	20.6	17.9	19.6
P3	Pr	6.6	4.0	7.1	4.7	7.4	4.6
P4		21.7	19.8	19.5	21.7	19.3	22.5
P4	Pr	7.2	4.1	7.5	4.7	7.4	4.4
M1		19.8	15.0	17.0	20.9	17.8	21.6
M1	Pr	6.5	3.2	7.9	5.1	7.5	4.6
M2		19.0	19.0	17.3	20.3	18.5	20.2	25.4	22.8
M2	Pr	5.8	3.1	6.3	4.2	6.8	4.3	7.3	3.5
M3				20.7	18.2	21.5	18.3
M3	Pr			6.2	4.3	6.4	3.5

		V 27534.4		V 27534.5		V 27534.6		V 27534.30
		L	W	L	W	L	W	L	W
P2		27.7	20.8	26.6	19.7
P2	Pr	5.7	4.0	8.4	5.8
P3		22.7	22.1	19.4	20.6	17.9	19.6
P3	Pr	6.6	4.0	7.1	4.7	7.4	4.6
P4		21.7	19.8	19.5	21.7	19.3	22.5
P4	Pr	7.2	4.1	7.5	4.7	7.4	4.4
M1		19.8	15.0	17.0	20.9	17.8	21.6
M1	Pr	6.5	3.2	7.9	5.1	7.5	4.6
M2		19.0	19.0	17.3	20.3	18.5	20.2	25.4	22.8
M2	Pr	5.8	3.1	6.3	4.2	6.8	4.3	7.3	3.5
M3				20.7	18.2	21.5	18.3
M3	Pr			6.2	4.3	6.4	3.5

	V 27534.1				V 27534.3		V 27534.2		V 27534.8		V 27534.9		V 27534.10		V 27534.11
	left		right		L	W	L	W	L	W	L	W	L	W	L	W
	L	W	L	W	L	W	L	W	L	W	L	W	L	W	L	W
p2	24.2	13.3	24.4	13.5			25.2	12.2	29.9	13.7
p3	23.0	14.2	22.4	14.2			19.4	13.1			24.6	14.5	24.2	15.8
p4	21.6	13.2	22.0	13.4	18.7	13.0	19.0	12.8
m1	21.4	12.7	21.6	12.8	16.7	12.3	16.4	12.1							25.2	13.3
m2	20.3	11.7	20.9	11.8	20.8	11.5	18.9	11.4
m3	21.8	9.8	21.3	9.7	24.8	10.0	24.9	9.8
i1	13.7	8.8	13.8	8.7	11.7	9.7	11.4	9.0
i2	14.5	8.0	14.4	8.2	11.9	8.9	11.9	9.0
i3	12.9	7.3	12.6	7.3	11.5	7.7	11.4	7.5