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Jakuba Pit (Pomo Pit), Croatiai
Regional Level Types
Jakuba Pit (Pomo Pit)Depression
CroatiaCountry

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Latitude & Longitude (WGS84):
43° 24' 3'' North , 15° 11' 38'' East
Latitude & Longitude (decimal):
43.40106,15.19409
GeoHash:
G#: srdycszvr
GRN:
N29E09
Type:
Depression
Mindat Locality ID:
398334
Long-form identifier:
mindat:1:2:398334:1
GUID (UUID V4):
0
Other Languages:
Croatian:
Jabučka kotlina, Hrvatska
Italian:
Fossa di Pomo (Fossa di Jakuba), Croazia


Ferromanganese crusts and coatings from the Jakuba Pit, a depression up to 275 m deep in the Central Adriatic, showed the presence of todorokite. The mineral is the major constituent of a Fe-poor and Mg-rich 10 Å manganate phase, forming up to 1 mm high stalactitic structures, composed of 4 μm long plate-like crystals, as well as collophorm-banded and botryoidal aggregates, found on shells and shell fragments of Ostrea choclear Poli exposed to sea water and collected by dredging the sea floor. Other authigenic and/or detrial minerals (calcite, dolomite, halite, clay minerals, quartz and feldspars) were also detected in minor to traces amounts (Dolenec, 2003).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


5 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
ⓘHalite3.AA.20NaCl
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
ⓘTodorokite4.DK.10(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘDolomite5.AB.10CaMg(CO3)2
Unclassified
ⓘ'Clay minerals'-
ⓘ'Feldspar Group'-

List of minerals for each chemical element

HHydrogen
Hⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
CCarbon
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
OOxygen
Oⓘ CalciteCaCO3
Oⓘ DolomiteCaMg(CO3)2
Oⓘ QuartzSiO2
Oⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
NaSodium
Naⓘ HaliteNaCl
Naⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
MgMagnesium
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
AlAluminium
Alⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
SiSilicon
Siⓘ QuartzSiO2
ClChlorine
Clⓘ HaliteNaCl
KPotassium
Kⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ DolomiteCaMg(CO3)2
Caⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
MnManganese
Mnⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
SrStrontium
Srⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
BaBarium
Baⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O

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References

Dolenec, T. (2003) Todorokite - a 10 Å manganate from the Jakuba Pit (Central Adriatic). RMZ - Materials and Geoenvironment, 50, 2, 453-466.
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