Carmopolis Evaporite

Occurrence in Sergipe, Brazil with commodities Calcium, Magnesite

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Commodities
Host and associated rocks
Nearby scientific data
Economic information about the deposit and operations
Links to other databases
Bibliographic references
General comments
Reporter information

Geologic information

Identification information

Deposit ID	10068124
MRDS ID	W001051
Record type	Site
Current site name	Carmopolis Evaporite

Geographic coordinates

Geographic coordinates:	-36.99887, -10.23118 (WGS84)

Site location context

Political divisions (FIPS codes)

Sergipe(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country	State
Brazil	Sergipe

Commodities

Commodity	Importance
Calcium	Primary
Magnesite	Primary

Host and associated rocks

Host or associated Host

Rock type Sedimentary Rock > Chemical Sediment > Evaporite

Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1)	-36.99887, -10.23118	ListMap

Economic information

Economic information about the deposit and operations

Development status	Occurrence
Commodity type	Both
Significant	No

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	W001051

Bibliographic references

Deposit

WRITTEN COMMUNICATION M.G. WHITE
Other Database

CIMRI

General comments

Subject category	Comment text
Deposit	R. HITES DISCUSSION ON THE ORIGIN OF TACHYHYDRITE EXPLAINS OCCURANCE OF EXCESS CALCIUM IN BASIN, NOT NORMALLY POSSIBLE IN ORDINARY SEAWATER EVAPORATION. EXPERIMENTALLY HE ADDED FERRIC CHLORIDE IN SATURATED BRINE. THIS PRODUCED (HCL) WITH AN ACID PH VALUE OF 1.5 IN BRINE. THIS CORROSIVE BRINE THEN WAS ABLE TO ATTACK LIMESTONE (CACO3) IN THE BASIN THUS PROVIDING THE NEEDED CALCIUM FOR TACHYHYDRITE FORMATION.

Subject category

Comment text

Deposit

R. HITES DISCUSSION ON THE ORIGIN OF TACHYHYDRITE EXPLAINS OCCURANCE OF EXCESS CALCIUM IN BASIN, NOT NORMALLY POSSIBLE IN ORDINARY SEAWATER EVAPORATION. EXPERIMENTALLY HE ADDED FERRIC CHLORIDE IN SATURATED BRINE. THIS PRODUCED (HCL) WITH AN ACID PH VALUE OF 1.5 IN BRINE. THIS CORROSIVE BRINE THEN WAS ABLE TO ATTACK LIMESTONE (CACO3) IN THE BASIN THUS PROVIDING THE NEEDED CALCIUM FOR TACHYHYDRITE FORMATION.

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-MAR-1974	Warfle, Thomas M.	U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.