{"_buckets": {"deposit": "ca7573a7-96b9-4355-abec-9377b31dad7b"}, "_deposit": {"created_by": 12, "id": "8948", "owner": "12", "owners": [12], "owners_ext": {"displayname": "", "username": ""}, "pid": {"revision_id": 0, "type": "depid", "value": "8948"}, "status": "published"}, "_oai": {"id": "oai:meral.edu.mm:recid/00008948"}, "author_link": [], "item_1583103067471": {"attribute_name": "Title", "attribute_value_mlt": [{"subitem_1551255647225": "ECONOMIC ASPECTS OF GRANITIC PEGMATITE FROM THABEIKKYIN, MOGOK AND  MOMEIK TOWNSHIP", "subitem_1551255648112": "en"}]}, "item_1583103085720": {"attribute_name": "Description", "attribute_value_mlt": [{"interim": "The main purpose of this study is to investigate the petrological, mineralogical and genetic aspects of gem quality mineral-bearing pegmatitic rocks. The pegmatits from tlm􀁊e different locali lies in northern Myanmar; (1) PyingyitaW1g, Singu area, (2) Auk Namphate-Apaw Namphate- akan 􀁑i -Pantaw. Mogok area, and (3) Ketchel-Molo, Momeik area were studied. \nThis work include detailed field investigation in each pegmatite occurrence, petrographical identification, mineral identification by X.RD technique and trace element analysis by X.R.F method. In addition, detailed investigation on gem quality minerals were also done by using refractometer and gemmolite. Total of ten pegmatite occtmences, (six in Momeik and four in Mogok areas) were studied. \nThe mineralogical assemblages found in the pegmatite of the individual l cality are quit dilforcm. The large minerals are found in all of the study area but giant quartz, orthoclase, aquamarine and topaz crystals are found in Mogok area only. In Mogok area, rare gemquality minerals of spessarLine garnet jeremejevite, herderite, totumaline, scheelite and radioactive minerals such a. thorianit . uranoth, H·ial\u0027i and thomtite are fotmd. In Momeik area, local miners mainly produce mushroom tou11naline, prismatic towmaline, petalite, hambergite, phenakite, pollucite and minor accessory minerals of yellow apatjte and tantalite are foW1d. According to the mineralogical and geochemical characteri tics, pegmatites f the Singu area fall into the pegmatite family LCT in class Rare Element and LcpidoJite Subtype in Rare-Earth pegmatite type. The metamorphic environment and the structural fcatille of pegmati tes such as interior pods/pockets ot crosscutting or conformable nature, also with an agreement with L T type in Rare Element Class of Cerny 1991 classification. Low-pressure, Abukuma amphibolite to upper greenschist faciesFormed at pressure-2-4 kb and tcmperature-650-500° .Th Singu pegmatit has \nabundant lepidolite(K(Li,AIMSi Al),, Oio(F,OH)2)and be1yl Be3Ali( iO_1),,\nThe pegmatites ofMomeik area fall into the pegmatite family LCT in class Rare · lement and PetaJite Subtype in Rare-Earth pegmatite type. The metamorphic environment and the structural featur s of pegmatites uch as interior pods/pockets ot crosscutting or confonnable nature also with an agreement with LC type in Rare •1ement Class of Cerny 1991 classification as Low-pressure, Abukuma amphibolite to upper greenschi t facies Formed at pressure---2-4 kb and temperature~ 650-500° TI1e Momeik.pegmatite contains petalite tantalite, lepidolite, pollucite and b 1yl. \nAccording to mineralogical and geochemical characteri tics, pegmatite ofMogok area fall into both of the pegmatite family LCT and NYF in class Rare lement of and eryl-columbite ubtyp in Beryl Pegmati te type. The metamorphic environment and the structural features of pegmatitcs uch as interior pods/pockets ot crosscutting or conformable nature, also with an agreement with L type and NYF type in Rare Element Class of erny 1991 classification. The Mogok pegmatite bears beryl colwnbite, tantalite, lepidolite and fluorite. \nFor local exploration at the mine site in the study area, iron oxides stained fractures arc g od exploration guide for the discovery of mineral-bearing pods. 1l1e gem quality mineral-bearing pockets have different physical properties as compared to those of the host pegmatite due to the pre ence of clayey mate1ial in the pockets. In tourmaline mines when looking for pockets there are some key indicators that will aid the search. In typical quartz and feldspar pegmatites one of the key indicators is tloat c1ystal shards with good euhedrsal c1ystal faces. These shards are helpful in locating the source and finding thl! hidden crystals by digging. Another indicator is large quartz outcrop with plants or vegetation growing out ofit. Generally vugs and cavities filled with water allow plants to survive and thrive in their own little water supply especially if some eruth has entered the cavity upon collapse in the past. Another method is using ground penetration radar ( GPR). The application of GPR has been successful in de! i ncating gem bearing zone in pegmatite veins, sills and dykes. \nUnderground mining methods such as square pit mining, OJXn pit mining and aditing are employed \nin primruy pegmatite mining and sluicing method is applied in secondary on highly weathered pegmatiles."}]}, "item_1583103108160": {"attribute_name": "Keywords", "attribute_value_mlt": [{"interim": "PyingyitaW1g, Singu area, Ketchel-Molo, Momeik area, Mogok area"}]}, "item_1583103120197": {"attribute_name": "Files", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_access", "date": [{"dateType": "Available", "dateValue": "2023-06-27"}], "displaytype": "preview", "download_preview_message": "", "file_order": 0, "filename": "Kyaw Khaing Win Ph D. Dissertation.May.2009.pdf", "filesize": [{"value": "1.5 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_0", "mimetype": "application/pdf", "size": 1500000.0, "url": {"url": "https://meral.edu.mm/record/8948/files/Kyaw Khaing Win Ph D. Dissertation.May.2009.pdf"}, "version_id": "d3344159-e57e-4999-b857-a8e4a5642041"}]}, "item_1583103233624": {"attribute_name": "Thesis/dissertations", "attribute_value_mlt": [{"subitem_awarding_university": "University of Yangon"}]}, "item_1583105942107": {"attribute_name": "Authors", "attribute_value_mlt": [{"subitem_authors": [{"subitem_authors_fullname": "Kyaw Khaing Win"}]}]}, "item_1583159729339": {"attribute_name": "Publication date", "attribute_value": "2009-05-31"}, "item_title": "ECONOMIC ASPECTS OF GRANITIC PEGMATITE FROM THABEIKKYIN, MOGOK AND  MOMEIK TOWNSHIP", "item_type_id": "21", "owner": "12", "path": ["1582963390870", "1582967711045"], "permalink_uri": "https://meral.edu.mm/records/8948", "pubdate": {"attribute_name": "Deposit date", "attribute_value": "2023-06-27"}, "publish_date": "2023-06-27", "publish_status": "0", "recid": "8948", "relation": {}, "relation_version_is_last": true, "title": ["ECONOMIC ASPECTS OF GRANITIC PEGMATITE FROM THABEIKKYIN, MOGOK AND  MOMEIK TOWNSHIP"], "weko_shared_id": -1}