Class `<<DataType>> AlterationDescription`

AlterationDescription decribes aspects of a geologic unit or earth material that are the result of bulk chemical, mineralogical or physical changes related to change in the physical or chemical environment. Includes weathering, supergene alteration, hydrothermal alteration and metasomatic effects not considered metamorphic.

A soil profile description would have to be constructed as a GeologicUnit with unit parts representing the various horizons in the profile.

Thickness of a weathering profile can be delivered as unitThickness of an AlterationUnit.

Local Subclasses: (none)

Attributes

Name

Type

Bounds

From Class

Notes

alterationType

AlterationTypeTerm

1..1

AlterationDescription

AlterationType is a general description of the dominant alteration mineralogy or alteration type, in common usage. Examples include: argillic, phyllic, potassic, propylitic, calc-silicate, skarn, deuteric, greisen, serpenitisation, weathering, etc.

Attribute tagged values
Tag	Value
inlineOrByReference	byReference
sequenceNumber	1

alterationDegree

Outbound Associations

Name

Type

Multiplicity

From Class

Notes

alterationEvent

GeologicEvent

AlterationDescription

To denote the age, environment and process associated with alteration of a GeologicUnit or material

Association tagged values
Tag	Value
nillable	True
sequenceNumber	5

Constraints

Constraint	Type	Status	Weight

Tagged values

Tag	Value	Notes
isCollection	false	Values: true,false Default: false Description: attribute group gml:AggregationAttributeGroup is a
noPropertyType	false	Values: true,false Default: false Description: suppress automatic creation of *PropertyType compl

GML-conformant XML Implementation Details

<xs:element xmlns:xs="http://www.w3.org/2001/XMLSchema" name="AlterationDescription" type="gsmlem:AlterationDescriptionType" substitutionGroup="gml:AbstractObject">

    <xs:annotation>

        <xs:documentation>AlterationDescription decribes aspects of a geologic unit or earth material that are the result of bulk chemical, mineralogical or physical changes related to change in the physical or chemical environment. Includes weathering, supergene alteration, hydrothermal alteration and metasomatic effects not considered metamorphic.



A soil profile description would have to be constructed as a GeologicUnit with unit parts representing the various horizons in the profile.



Thickness of a weathering profile can be delivered as unitThickness of an AlterationUnit.</xs:documentation>

    </xs:annotation>

</xs:element>

<xs:complexType xmlns:xs="http://www.w3.org/2001/XMLSchema" name="AlterationDescriptionType">

    <xs:sequence>

        <xs:element name="alterationType" type="gml:ReferenceType">

            <xs:annotation>

                <xs:appinfo>

                    <gml:targetElement xmlns:gml="http://www.opengis.net/gml/3.2">gsmlem:AlterationTypeTermType</gml:targetElement>

                </xs:appinfo>

                <xs:documentation>AlterationType is a general description of the dominant alteration mineralogy or alteration type, in common usage. Examples include: argillic, phyllic, potassic, propylitic, calc-silicate, skarn, deuteric, greisen, serpenitisation,  weathering, etc.</xs:documentation>

            </xs:annotation>

        </xs:element>

        <xs:element name="alterationDegree" nillable="true" minOccurs="1" maxOccurs="unbounded">

            <xs:annotation>

                <xs:documentation>AlterationDegree is a term to specify degree of modification from original material.  eg: weak, moderate, strong, intense</xs:documentation>

            </xs:annotation>

            <xs:complexType>

                <xs:complexContent>

                    <xs:extension base="swe:CategoryPropertyType">

                        <xs:attribute name="nilReason" type="gml:NilReasonType"/>

                    </xs:extension>

                </xs:complexContent>

            </xs:complexType>

        </xs:element>

        <xs:element name="alterationProduct" type="gsmlem:EarthMaterialPropertyType" nillable="true" minOccurs="1" maxOccurs="unbounded">

            <xs:annotation>

                <xs:documentation>AlterationProduct is the material result of alteration processes, e.g. alteration minerals, saprolite, ferricrete, clay, calcrete, skarn, etc. Materials observed in a soil profile could be identified using this property.</xs:documentation>

            </xs:annotation>

        </xs:element>

        <xs:element name="alterationDistribution" nillable="true" minOccurs="1" maxOccurs="unbounded">

            <xs:annotation>

                <xs:documentation>AlterationDistribution describes the spatial distribution or geometry of alteration zones. eg: patchy, spotted, banded, viens, vein breccia, pervasive, disseminated, etc</xs:documentation>

            </xs:annotation>

            <xs:complexType>

                <xs:complexContent>

                    <xs:extension base="swe:CategoryPropertyType">

                        <xs:attribute name="nilReason" type="gml:NilReasonType"/>

                    </xs:extension>

                </xs:complexContent>

            </xs:complexType>

        </xs:element>

        <xs:element name="alterationEvent" type="gsmlga:GeologicEventPropertyType" nillable="true">

            <xs:annotation>

                <xs:documentation>To denote the age, environment and process associated with alteration of a GeologicUnit or material</xs:documentation>

            </xs:annotation>

        </xs:element>

    </xs:sequence>

</xs:complexType>