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Kitadaito-jima, Daito Islands, Okinawa, Japani
Regional Level Types
Kitadaito-jimaIsland
Daito IslandsGroup of Islands
OkinawaPrefecture
JapanCountry

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Latitude & Longitude (WGS84):
25° 56' 59'' North , 131° 17' 59'' East
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:


Guano-derived phosphorite rock mined mostly in pre-WW2 period, by hand, by the Dai Nippon Sugar company (now Dai Nippon Meiji Sugar), which also ran sugarcane plantations. The United States took over the island at the end of the war, in 1945, after which mechanised equipment was brought in for mining and production increased, until the deposit was exhausted by the mid-1950s. Ruins of a phosphate warehouse can still be seen.

Regions containing this locality

Philippine Sea PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


2 valid minerals.

Detailed Mineral List:

Hydroxylapatite
Formula: Ca5(PO4)3(OH)
Description: Phosphorite rock derived from guano.
Reference: Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan)
Hydroxylapatite var: Carbonate-rich Hydroxylapatite
Formula: Ca5(PO4,CO3)3(OH,O)
Description: Phosphorite rock derived from guano.
Reference: Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan)
Vashegyite
Formula: Al11(PO4)9(OH)6 · 38H2O
Reference: Shinichi Kato collection

List of minerals arranged by Strunz 10th Edition classification

Group 8 - Phosphates, Arsenates and Vanadates
Hydroxylapatite8.BN.05Ca5(PO4)3(OH)
var: Carbonate-rich Hydroxylapatite8.BN.05Ca5(PO4,CO3)3(OH,O)
Vashegyite8.DB.10Al11(PO4)9(OH)6 · 38H2O

List of minerals arranged by Dana 8th Edition classification

Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Hydroxylapatite41.8.1.3Ca5(PO4)3(OH)
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)4(XO4)3Zq·xH2O
Vashegyite42.12.2.1Al11(PO4)9(OH)6 · 38H2O
Unclassified Minerals, Mixtures, etc.
Hydroxylapatite
var: Carbonate-rich Hydroxylapatite
-Ca5(PO4,CO3)3(OH,O)

List of minerals for each chemical element

HHydrogen
H Hydroxylapatite (var: Carbonate-rich Hydroxylapatite)Ca5(PO4,CO3)3(OH,O)
H VashegyiteAl11(PO4)9(OH)6 · 38H2O
H HydroxylapatiteCa5(PO4)3(OH)
CCarbon
C Hydroxylapatite (var: Carbonate-rich Hydroxylapatite)Ca5(PO4,CO3)3(OH,O)
OOxygen
O Hydroxylapatite (var: Carbonate-rich Hydroxylapatite)Ca5(PO4,CO3)3(OH,O)
O VashegyiteAl11(PO4)9(OH)6 · 38H2O
O HydroxylapatiteCa5(PO4)3(OH)
AlAluminium
Al VashegyiteAl11(PO4)9(OH)6 · 38H2O
PPhosphorus
P Hydroxylapatite (var: Carbonate-rich Hydroxylapatite)Ca5(PO4,CO3)3(OH,O)
P VashegyiteAl11(PO4)9(OH)6 · 38H2O
P HydroxylapatiteCa5(PO4)3(OH)
CaCalcium
Ca Hydroxylapatite (var: Carbonate-rich Hydroxylapatite)Ca5(PO4,CO3)3(OH,O)
Ca HydroxylapatiteCa5(PO4)3(OH)

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