Texas · Pecos County
Occurrence

Los Nietos Occurrence

Pecos County, Texas, United States
ZincLead
⌖ Show on mapUSGS source ↗
Commodities
PrimaryZinc, Lead
Commodity typeM
Deposit
Deposit typeStratabound
Model224: Mississippi Valley, S.E. Missouri Pb-Zn
Deposit sizeN
Ore controlMineralization Occurs At Contact Between Dolostone And Shale And Non-Porous Limestone Along The Leonardian Reef Edge.
Materials
Ore mineralsGalena
GangueCalcite, Dolomite, Pyrite
Geology
Host rockDolomite
Associated rockShale,Limestone
StructurePaleoshelf Edge, Reef Complex
Tectonic settingInterior Basin
AlterationDolomite Replaces Lower Leonardian Shelf-Margin Reef And Bio-Grainstones. Perhaps An Early (Shallow Burial) Phase Of Fine-To-Medium Crystalline Dolomite And A Late, But Pre-Mineral, (Deep Burial) Phase Of Coarse Crystalline Dolomite And Formation Of Secondary Porosity. A Late (Pre, Syn, And Post Mineral) Phase Of Dolomite And Calcite Cement.
Economic & production
Development statusOccurrence
Discovery year1949
Identification
Deposit ID10065070
MRDS IDTC40067
RegionNA
Data scoreB
Coordinates30.95852, -102.65878
References
MAZULLO, S.J., 1986, MISSISSIPPI VALLEY-TYPE SULFIDES IN LOWER PERMIAN DOLOMITES, DELAWARE BASIN, TEXAS: IMPLICATIONS FOR BASIN EVOLUTION: AAPG BULLETIN, V. 70, P. 943-952CIMRI