IEDA / DECADE Detail

Data from the Global Volcanism Program of the Smithsonian Institution

Details for: Zaozan [Zaosan]

Okama crater of Goryu-dake, the most well-known feature of the Zao volcanic complex, is seen from the east. The 360-m-wide lake is about 60 m deep. The volcanic lake has been the site of many historical eruptions. White mud deposited on the lake floor is periodically disturbed by gas emission, changing the color of the lake water. The Zao volcano group, the most active of northern Honshu, consists of a complex cluster of stratovolcanoes straddling the Pacific Ocean-Japan Sea divide. Copyrighted photo by Yoshihisa Kawanabe (Japanese Quaternary Volcanoes database, RIODB, http://riodb02.ibase.aist.go.jp/strata/VOL_JP/EN/index.htm and Geol Surv Japan, AIST, http://www.gsj.jp/).

Volcano Number:	283190
Volcano Name:	Zaozan [Zaosan]
Country:	Japan
Volcano Type:	Complex
Last Eruption:	1940 CE
Elevation:	1841m
Tectonic Setting:	Subduction zone / Continental crust (> 25 km)
Pop. within 5km:	632
Pop. within 10km:	4681
Pop. within 30km:	550409
Pop. within 100km:	4956958
Latitude:	38.144
Longitude:	140.44

Eruption Data from the Global Volcanism Program of the Smithsonian Institution

Volcano Number	Volcano Name	Eruption Number	Activity Type	Explosivity Index Max	Explosivity Index Modifier	Activity Area	Activity Unit	Start Evidence Method	Start Date	End Date
283190	Zaozan [Zaosan]	17938	Confirmed Eruption			Goshiki-dake area		Radiocarbon (corrected)	-7600
283190	Zaozan [Zaosan]	17939	Confirmed Eruption			Goshiki-dake	Z-To5a tephra	Radiocarbon (corrected)	-5600
283190	Zaozan [Zaosan]	17940	Confirmed Eruption			Goshiki-dake area		Radiocarbon (corrected)	-5500
283190	Zaozan [Zaosan]	17941	Confirmed Eruption			Goshiki-dake area	Z-To5b tephra	Radiocarbon (corrected)	-4150
283190	Zaozan [Zaosan]	17942	Confirmed Eruption			Goshiki-dake area	Z-To5 tephra	Radiocarbon (corrected)	-3850
283190	Zaozan [Zaosan]	17943	Confirmed Eruption			Goshiki-dake area	Z-To6 tephra	Radiocarbon (corrected)	-3350
283190	Zaozan [Zaosan]	17944	Confirmed Eruption			Goshiki-dake area	Z-To7 tephra	Radiocarbon (corrected)	-2600
283190	Zaozan [Zaosan]	17945	Confirmed Eruption			Goshiki-dake area	Z-To8 tephra	Radiocarbon (corrected)	-2300
283190	Zaozan [Zaosan]	17946	Confirmed Eruption			Goshiki-dake		Tephrochronology	-2000
283190	Zaozan [Zaosan]	17947	Confirmed Eruption			Goshiki-dake		Radiocarbon (corrected)	-1600
283190	Zaozan [Zaosan]	17948	Confirmed Eruption	4		Goshiki-dake area	Z-To9 tephra	Radiocarbon (corrected)	300
283190	Zaozan [Zaosan]	17949	Uncertain Eruption			Okama			773
283190	Zaozan [Zaosan]	17950	Confirmed Eruption	3		Okama	Z-To10 tephra?	Historical Observations	884
283190	Zaozan [Zaosan]	17951	Confirmed Eruption	2	?	Okama		Historical Observations	1183/5/28
283190	Zaozan [Zaosan]	17952	Confirmed Eruption	3		Okama		Historical Observations	1227
283190	Zaozan [Zaosan]	17953	Confirmed Eruption	2	?	Okama		Historical Observations	1230/11/29
283190	Zaozan [Zaosan]	17954	Uncertain Eruption	2	?	Okama			1331	1333
283190	Zaozan [Zaosan]	17955	Uncertain Eruption	2	?	Okama			1350
283190	Zaozan [Zaosan]	17956	Confirmed Eruption	3		Goshiki-dake area	Z-To11 tephra	Radiocarbon (corrected)	1400
283190	Zaozan [Zaosan]	17957	Confirmed Eruption	2	?	Okama		Historical Observations	1620
283190	Zaozan [Zaosan]	17958	Confirmed Eruption	2	?	Okama		Historical Observations	1622
283190	Zaozan [Zaosan]	17959	Confirmed Eruption	3		Okama		Historical Observations	1623/5/15	1624/11/15
283190	Zaozan [Zaosan]	17960	Confirmed Eruption	2	?	Okama		Historical Observations	1630
283190	Zaozan [Zaosan]	17961	Confirmed Eruption	2	?	Okama		Historical Observations	1641
283190	Zaozan [Zaosan]	17962	Confirmed Eruption	2	?	Okama		Historical Observations	1668
283190	Zaozan [Zaosan]	17963	Confirmed Eruption	3		Okama		Historical Observations	1669
283190	Zaozan [Zaosan]	17964	Confirmed Eruption	2		Okama		Historical Observations	1670/4/26	1670/9/26
283190	Zaozan [Zaosan]	17965	Confirmed Eruption	2		Okama		Historical Observations	1694/5/29	1694/8/30
283190	Zaozan [Zaosan]	17966	Confirmed Eruption	2		SE side of Okama		Historical Observations	1794/9/22	1794
283190	Zaozan [Zaosan]	17967	Confirmed Eruption	2		Okama		Historical Observations	1796/3/24
283190	Zaozan [Zaosan]	17968	Confirmed Eruption	2		Okama		Historical Observations	1804
283190	Zaozan [Zaosan]	17969	Confirmed Eruption	2		Okama		Historical Observations	1806/7/12
283190	Zaozan [Zaosan]	17970	Confirmed Eruption	2		Okama		Historical Observations	1809/6/12	1809/12/29
283190	Zaozan [Zaosan]	17971	Confirmed Eruption	2		Okama		Historical Observations	1821/1/27	1821/5/1
283190	Zaozan [Zaosan]	17972	Confirmed Eruption					Historical Observations	1822/5/1
283190	Zaozan [Zaosan]	17973	Confirmed Eruption	2		Okama		Historical Observations	1830
283190	Zaozan [Zaosan]	17974	Confirmed Eruption	2		Okama		Historical Observations	1831/11/22
283190	Zaozan [Zaosan]	17975	Confirmed Eruption	2		Okama		Historical Observations	1833
283190	Zaozan [Zaosan]	17976	Confirmed Eruption	2		Okama		Historical Observations	1867/10/21
283190	Zaozan [Zaosan]	17977	Confirmed Eruption	1	?	Okama		Historical Observations	1873	1873
283190	Zaozan [Zaosan]	17978	Uncertain Eruption	1	?	Okama			1890
283190	Zaozan [Zaosan]	17979	Confirmed Eruption	2	?	Okama		Historical Observations	1894/7/3	1894/7/3
283190	Zaozan [Zaosan]	17980	Confirmed Eruption	1		Okama		Historical Observations	1895/2/15	1895/3/22
283190	Zaozan [Zaosan]	17981	Confirmed Eruption	2		Okama		Historical Observations	1895/8/22	1895/9/28
283190	Zaozan [Zaosan]	17982	Confirmed Eruption	1		Okama		Historical Observations	1896/3/8	1896/3/8
283190	Zaozan [Zaosan]	17983	Uncertain Eruption	1	?	Okama			1896/9/1
283190	Zaozan [Zaosan]	17984	Uncertain Eruption	1	?	Okama			1897/1/14	1897/1/14
283190	Zaozan [Zaosan]	17985	Confirmed Eruption	1	?	Okama		Historical Observations	1905
283190	Zaozan [Zaosan]	17987	Uncertain Eruption	1	?	Okama			1927
283190	Zaozan [Zaosan]	17988	Uncertain Eruption	1	?	Okama			1939
283190	Zaozan [Zaosan]	17989	Confirmed Eruption	1		Okama		Historical Observations	1940/5/18	1940/5/18

Emissions Data from the Global Volcanism Program of the Smithsonian Institution

Sorry. No emissions data found for this volcano.

Data from the Earthchem Library

Sorry. No data exist for this volcano in the EarthChem Library.

Data from the Earthchem Portal

Sample ID	LINK	Method	Material	Rock Class	Rock Name	SiO₂ WT%	TiO₂ WT%	Al₂O₃ WT%	Fe₂O₃ WT%	Fe₂O₃ Total WT%	FeO WT%	FeO Total WT%	MnO WT%	MgO WT%	CaO WT%	Na₂O WT%	K₂O WT%	P₂O₅ WT%	Total WT%	Ba PPM	Cr PPM	Nb PPM	Ni PPM	Rb PPM	Sr PPM	V PPM	Y PPM	Zr PPM	⁸⁷Sr / ⁸⁶Sr RATIO	¹⁴³Nd / ¹⁴⁴Nd RATIO
YYPF	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	39.92						19.07	0.26	42.07	0.18				100
13	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	55.93	0.79	17.73	2		5.64		0.15	4.38	7.47	2.78	0.98	0.17	98.02
990609-8	DETAILS	XRF	Rock	Igneous Felsic Volcanic	Dacite	66.94	0.62	16.07		4.93			0.12	1.51	3.07	3.51	0.83	0.08	97.68	425	7	5	1	8	199	59	25	135
990609-8	DETAILS	NOT GIVEN	Rock	Igneous Felsic Volcanic	Dacite	68.88	0.64	16.54				4.57	0.12	1.55	3.16	3.61	0.85	0.08	100
ASU625	DETAILS	XRF	Rock	Igneous Unknown Plutonic	Not-given	62.35	0.89	17.28	6.72				0.1	2.82	3.33	3.9	2.59	0.21	100	522	79	11	42	88	502	138	31	258
4	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	55.31	1.12	17.25	3.03		6.07		0.13	4.31	8.89	2.67	0.88	0.13	99.79
6Z1	DETAILS	XRF	Rock	Igneous Mafic Volcanic	Basalt																								0.70375	0.512822
6Z1	DETAILS	TIMS	Rock	Igneous Mafic Volcanic	Basalt	58.41								2.47					60.88
22	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	57.93	0.81	17.51	2.39		4.57		0.13	4	7.31	2.89	1.28	0.18	99
24	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	59.78	0.58	17.17	2.45		4.1		0.12	3.21	7.19	3.18	1.1	0.13	99.01
9	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	55.71	0.75	17.9	2.74		5.54		0.13	4.49	7.46	2.57	1.2	0.13	98.62
18	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	57.2	0.84	16.72	2.66		5.26		0.13	4.18	7.82	2.74	1.41	0.12	99.08
3	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	52.95	1.08	18.39	3.18		5.61		0.15	4.73	9.09	2.59	0.83	0.16	98.76
17	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	56.5	0.85	17.05	3.32		4.56		0.15	4.2	8.39	2.96	1.15	0.18	99.31
990609-14	DETAILS	XRF	Rock	Igneous Felsic Volcanic	Dacite	68.92	0.57	15.32		4.74			0.12	1.41	3.68	4	0.98	0.1	99.84	408	10	5		10	258	75	26	126
990609-14	DETAILS	NOT GIVEN	Rock	Igneous Felsic Volcanic	Dacite	69.36	0.57	15.42				4.29	0.12	1.42	3.7	4.03	0.99	0.1	100
990528-6	DETAILS	XRF	Rock	Igneous Intermediate Volcanic	Andesite	53.17	0.93	17.73		10.94			0.17	4.53	8.7	2.59	0.41	0.13	99.3	121	52	3	9	8	347	227	21	58
990528-6	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	54.14	0.95	18.05				10.03	0.17	4.61	8.86	2.64	0.42	0.13	100
ASU411	DETAILS	XRF	Rock	Igneous Intermediate Plutonic	Granodiorite	66.47	0.6	17.03	3.76				0.08	1.45	4.04	4.1	1.9	0.23	99.66	517	0	7	0	50	764	70	12	127
25	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	60.83	0.76	16.5	2.76		4.45		0.16	2.82	5.65	3.2	1.03	0.13	98.29
14	DETAILS	NOT GIVEN	Rock	Igneous Mafic Volcanic	Basalt	51.45	0.97	17.67	2.52		7.65		0.15	5.3	9.76	2.19	0.87	0.1	98.63
28	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	64.13	0.59	16.59	2.97		2.65		0.12	2.05	5.01	3.25	1.25	0.14	98.75
MTPF	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	52.46	0.11	0.89			24.29		1.31	20.59	0.74	0.01			100
MTPF	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	52.76	0.2	0.99			11		0.76	13.37	20.96	0.24			100
MTPF	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	48.22	1.05	6.85			14.87		0.49	14.99	10.29	1.23	0.05		98.04

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Data from the SESAR Database

IGSN	Object Name	Object Type	Object Class	Material	Field Name	Link
NHB000PMD	NMNH 120681-00 (MIN)	Individual Sample		Mineral>Jacobsite	Jacobsite	Details
NHB000R0F	NMNH 122471-00 (MIN)	Individual Sample		Mineral>Jacobsite	Jacobsite with rhodochrosite	Details

Data from the MaGa Database

Error. The MaGa Web Services (http://www.magadb.net/web_services/) are down.