Bolton Pegmatite float boulder occurrence, Bolton, Worcester County, Massachusetts, USAi
Regional Level Types | |
---|---|
Bolton Pegmatite float boulder occurrence | Occurrence |
Bolton | Town |
Worcester County | County |
Massachusetts | State |
USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
42° 26' 17'' North , 71° 33' 57'' West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~0km
Type:
Köppen climate type:
Mindat Locality ID:
193775
Long-form identifier:
mindat:1:2:193775:9
GUID (UUID V4):
5eaf2a4e-675a-4e6f-9e71-f4c1135f180d
Granite pegmatite boulders found near the Bolton Limestone Quarry. Because of the proximity of the float occurrence, the pegmatite species have been historically but erroneously ascribed to the limestone quarry. Shepard (1832) noted: "In the United States, its [petalite] only locality is Bolton, (Mass.) where it exists in a lime-quarry, along with Scapolite, Sphene and Pyroxene." Original specimens of petalite are untested by modern techniques and the identification of the mineral is seriously doubtful. Palache (1923) was one of the best reviewers of the locality and he addressed the problem of typical granite pegmatite minerals reported there: "There is an abundance of coarse granite pegmatite boulders in the immediate neighborhood of the quarry but the rock could not be discovered in place. ... Petalite has long been recorded as occurring at Bolton and Dana gives an analysis of this mineral from there [Bolton]. Many specimens labeled petalite were examined in both collections [Harvard and Boston Society of Natural History] studied but none of them proved to be correctly identified. They included platy diopside, microcline, scapolite, and especially a fine grained form of partially altered massive scapolite mixed with calcite. It seems probable that the petalite originally found here was from an erratic similar to the spodumene boulder found in Sterling, Massachusetts." Pollucite and other typical typical granite pegmatite minerals have been found in float boulders in other places in northern Massachusetts and Palache supposed that the same was true of the petalite being found coincidentally near the Bolton Lime Quarry.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
5 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
ⓘ Albite Formula: Na(AlSi3O8) |
ⓘ 'Gadolinite' ? Description: Gadolinite is a mineral characteristic of rare-earth rich granite pegmatites or alpine veins. No data have been published on the identification and efforts to locate any example, verified or not have been fruitless. The mineral may have been found in erratic pegmatite boulders, but certainly not in the marble. |
ⓘ 'Lepidolite' ? |
ⓘ Microcline Formula: K(AlSi3O8) |
ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
ⓘ Petalite ? Formula: LiAl(Si4O10) Description: An identification which has been handed down from posterity. No known tested and verified specimen. References: |
ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
ⓘ | Quartz | 4.DA.05 | SiO2 |
Group 9 - Silicates | |||
ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
ⓘ | Petalite ? | 9.EF.05 | LiAl(Si4O10) |
ⓘ | Microcline | 9.FA.30 | K(AlSi3O8) |
ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
Unclassified | |||
ⓘ | 'Lepidolite' ? | - | |
ⓘ | 'Gadolinite' ? | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Li | Lithium | |
Li | ⓘ Petalite | LiAl(Si4O10) |
O | Oxygen | |
O | ⓘ Albite | Na(AlSi3O8) |
O | ⓘ Microcline | K(AlSi3O8) |
O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
O | ⓘ Petalite | LiAl(Si4O10) |
O | ⓘ Quartz | SiO2 |
Na | Sodium | |
Na | ⓘ Albite | Na(AlSi3O8) |
Al | Aluminium | |
Al | ⓘ Albite | Na(AlSi3O8) |
Al | ⓘ Microcline | K(AlSi3O8) |
Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | ⓘ Petalite | LiAl(Si4O10) |
Si | Silicon | |
Si | ⓘ Albite | Na(AlSi3O8) |
Si | ⓘ Microcline | K(AlSi3O8) |
Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | ⓘ Petalite | LiAl(Si4O10) |
Si | ⓘ Quartz | SiO2 |
K | Potassium | |
K | ⓘ Microcline | K(AlSi3O8) |
K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Ganderia DomainDomain
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.