Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Fallgate Quarry, Milltown, Ashover, Derbyshire, England, UK

Oldest recorded age at locality: 346.7
Youngest recorded age at locality: 0

mindat Locality ID: 207031
mindat URL: http://www.mindat.org/loc-207031.html

Tectonic Settings:

Total number of sublocalities beneath "Fallgate Quarry, Milltown, Ashover, Derbyshire, England, UK": 0
Total number of bottom-level sublocalities: 0

Latitude: 53°9'24"N
Longitude: 1°28'13"W
Decimal Degree (lat, lon): 53.156666666667,-1.4702777777778

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

No IMA Minerals occur at this locality according to mindat

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Michelle_727	Ashover-Crich anticline is associated with the uplift of the Derbyshire Dome at 280 ma. The uplift exposed the Fallgate Volcanics, Matlock and Cawdor Limestone and Cawdor Shales of Visean age, and siltstone, mudstone and gritstone beds of Namurian age.
Michelle_807	The Fallgate Volcanics is exposed by the uplift of the Derbyshire Dome. This formation was visible in the Milltown Quarry on the Northwest corner as the Fallgate Tuff but is currently buried beneath slurry from fluorite workings.
Michelle_808	The Matlock and Crawdor Limestone are of Visean age. These formations host the Pb-Zn-Fluorite veins of Permo-Triassic to Jurassic age. The formations were exposed by the uplift of the Derbyshire Dome.
Michelle_809	The Matlock and Crawdor Limestone are of Visean age. These formations host the Pb-Zn-Fluorite veins of Permo-Triassic to Jurassic age. The formations were exposed by the uplift of the Derbyshire Dome.
Michelle_810	The Cawdor Shale
Michelle_811	The Namurian age Ashover Grits include siltstone, mudstone and gritstone.
Michelle_812	Pb-Zn-Fluorite mineral vein and chimney deposits in the Milltown Quarry are concentrated on the Southeastern flank of the Ashover-Crich anticline. Mineral veins (rakes) include Blackwell, Mill, Spencers, Great, Woodhead and Lomas.
Michelle_813	The formation of zinc hydroxide minerals described here would require a highly alkaline oxidizing environment. Such an environment could have been caused locally by the leaching of calcined limestone, itself the result of lime burning or possibly of the older pre-gunpowder mining technique of fire-setting. A relationship between the formation of the zinc hydroxides and weddellite has not been ruled out. The paper refers this as the 'zinc hydroxide zone'.

8 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Age from other Locality	Minerals explicitely stated as having this age	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID	Age Notes
Michelle_727	280	280	280		Uplift of Derbyshire Dome		Yes		1482	Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK	Milltown Quarry	Rust (1991)	UJMM10_14	Uplift of Derbyshire Dome
Michelle_807	346.7	330.9	Visean	Stratigraphy	Age of Fallgate Volcanics		Yes		1482	Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK	Milltown Quarry	Rust (1991)	UJMM10_14	Age of Fallgate Volcanics
Michelle_808	346.7	330.9	Visean	Stratigraphy	Age of Matlock Limestone		Yes		1482	Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK	Milltown Quarry	Rust (1991)	UJMM10_14	Age of Matlock Limestone
Michelle_809	346.7	330.9	Visean	Stratigraphy	Age of Cawdor Limestone		Yes		1482	Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK	Milltown Quarry	Rust (1991)	UJMM10_14	Age of Cawdor Limestone
Michelle_810	346.7	330.9	Visean	Stratigraphy	Age of Cawdor Shales		Yes		1482	Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK	Milltown Quarry	Rust (1991)	UJMM10_14	Age of Cawdor Shales
Michelle_811	326	313	Namurian	Stratigraphy	Age of siltstone, mudstone and gritstone		Yes		1482	Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK	Milltown Quarry	Rust (1991)	UJMM10_14	Age of siltstone, mudstone and gritstone
Michelle_812	252	174	Permo-Triassic, Early Jurassic		Age of Mississippi Valley Type mineralization		Yes	Anglesite, Cerussite, Fluorite, Galena, Litharge, Sphalerite, Sulphur	1482	Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK	Milltown Quarry	Rust (1991)	UJMM10_14	Age of Mississippi Valley Type mineralization
Michelle_813	0	0	Anthropogenic		Possibly anthropogenic	high	Yes	Ashoverite, Hemimorphite, Hydrocerussite, Hydrozincite, Palygorskite, Smithsonite, Sweetite, Wulfingite	1482	Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK	Milltown Quarry	Rust (1991)	UJMM10_14	Mineralization is likely of post-mining age due to the calcination of limestone interacting with zinc from vein mineralization. The reference suggests an anthropogenic origin for mineralization of the zinc hydroxide zone.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...