{"title":"Surface dissolution features and contact twinning in natural diamonds","authors":"Taijin Lu, Jie Ke, Zhi-li Qiu","doi":"10.1127/njma/2018/0108","DOIUrl":"https://doi.org/10.1127/njma/2018/0108","url":null,"abstract":"","PeriodicalId":51139,"journal":{"name":"Neues Jahrbuch Fur Mineralogie-Abhandlungen","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/njma/2018/0108","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43293971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Chodarchay porphyry–high-sulfidation epithermal Cu-Au deposit in the Tarom subzone of the western Alborz structural zone of NW Iran is related to quartz-monzonite and alkali-granite intrusions that were emplaced within the volcanic-volcaniclastic rocks of Karaj Formation during Tertiary. The Chodarchay deposit formed as a high-sulfidation epithermal overprint on porphyry type mineralization. The mineralization occurred as stockwork, dissemination, veinlet, open space filling and breccias. Chalcopyrite, pyrite, sphalerite, and galena are the main sulfide minerals in the area. The sulfur isotope composition of sulfide minerals from the Chodarchay deposit is positive, ranging from 0.2 to 6.8 ‰. The sphalerite-galena isotope geothermometer shows 360 °C for the crystallization temperature. Sulfur was sourced from a homogeneous magma, and its isotopic composition decreases with depth and temperature decreasing due to fluid oxidation changes. Therefore, sulfur isotope assemblages show a systematic spatial distribution within the Chodarchay system.
{"title":"Sulfur isotope geochemistry of the Chodarchay Cu-Au deposit, Tarom, NW Iran","authors":"N. Yasami, M. Ghaderi, P. Alfonso","doi":"10.1127/NJMA/2018/0097","DOIUrl":"https://doi.org/10.1127/NJMA/2018/0097","url":null,"abstract":"The Chodarchay porphyry–high-sulfidation epithermal Cu-Au deposit in the Tarom subzone of the western Alborz structural zone of NW Iran is related to quartz-monzonite and alkali-granite intrusions that were emplaced within the volcanic-volcaniclastic rocks of Karaj Formation during Tertiary. The Chodarchay deposit formed as a high-sulfidation epithermal overprint on porphyry type mineralization. The mineralization occurred as stockwork, dissemination, veinlet, open space filling and breccias. Chalcopyrite, pyrite, sphalerite, and galena are the main sulfide minerals in the area. The sulfur isotope composition of sulfide minerals from the Chodarchay deposit is positive, ranging from 0.2 to 6.8 ‰. The sphalerite-galena isotope geothermometer shows 360 °C for the crystallization temperature. Sulfur was sourced from a homogeneous magma, and its isotopic composition decreases with depth and temperature decreasing due to fluid oxidation changes. Therefore, sulfur isotope assemblages show a systematic spatial distribution within the Chodarchay system.","PeriodicalId":51139,"journal":{"name":"Neues Jahrbuch Fur Mineralogie-Abhandlungen","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/NJMA/2018/0097","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44522573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Azizi, M. Hosseinzadeh, M. Moayyed, Kamal Siahcheshm
{"title":"Geology and geochemistry of the sediment-hosted stratabound red bed-type Cu-Pb (Zn-Ag) mineralization in the Dozkand-Moshampa Area, NW Zanjan, Iran","authors":"H. Azizi, M. Hosseinzadeh, M. Moayyed, Kamal Siahcheshm","doi":"10.1127/njma/2018/0101","DOIUrl":"https://doi.org/10.1127/njma/2018/0101","url":null,"abstract":"","PeriodicalId":51139,"journal":{"name":"Neues Jahrbuch Fur Mineralogie-Abhandlungen","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/njma/2018/0101","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43217365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Vondechenite, a new hydrous calcium copper chloride hydroxide, from the Bellerberg, East-Eifel volcanic area, Germany","authors":"J. Schlüter, T. Malcherek, D. Pohl, C. Schäfer","doi":"10.1127/NJMA/2018/0082","DOIUrl":"https://doi.org/10.1127/NJMA/2018/0082","url":null,"abstract":"","PeriodicalId":51139,"journal":{"name":"Neues Jahrbuch Fur Mineralogie-Abhandlungen","volume":"17 1","pages":"79-86"},"PeriodicalIF":0.5,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76056301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"From subcalcic pyropes to uvarovites: experimental crystallization of Cr-rich garnets in ultramafic systems with presence of Ca-bearing hydrous fluid","authors":"A. Chepurov, J. Dereppe, A. Turkin, V. Lin","doi":"10.1127/NJMA/2018/0084","DOIUrl":"https://doi.org/10.1127/NJMA/2018/0084","url":null,"abstract":"","PeriodicalId":51139,"journal":{"name":"Neues Jahrbuch Fur Mineralogie-Abhandlungen","volume":"106 1","pages":"65-78"},"PeriodicalIF":0.5,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80361015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kaikosrov Radmard, H. Zamanian, Mohamad Reza Hosseinzadeh, A. Khalaji
{"title":"Geochemistry and hydrothermal evolution of the Mazraeh Shadi–Hizehjan precious and base metal deposit, northeastern Tabriz, Iran","authors":"Kaikosrov Radmard, H. Zamanian, Mohamad Reza Hosseinzadeh, A. Khalaji","doi":"10.1127/NJMA/2017/0059","DOIUrl":"https://doi.org/10.1127/NJMA/2017/0059","url":null,"abstract":"","PeriodicalId":51139,"journal":{"name":"Neues Jahrbuch Fur Mineralogie-Abhandlungen","volume":"71 1","pages":"227-250"},"PeriodicalIF":0.5,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76540815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-09-01DOI: 10.15496/publikation-29614
G. Markl, Maximilian F. Keim
{"title":"Formation of galena pseudomorphs after pyromorphite","authors":"G. Markl, Maximilian F. Keim","doi":"10.15496/publikation-29614","DOIUrl":"https://doi.org/10.15496/publikation-29614","url":null,"abstract":"","PeriodicalId":51139,"journal":{"name":"Neues Jahrbuch Fur Mineralogie-Abhandlungen","volume":"30 1","pages":"209-226"},"PeriodicalIF":0.5,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83341567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Relation of stibnite mineralisation and geothermal fluids in southern Tuscany (central Italy): an isotope (C, O, H, S) and Rare Earth Element study","authors":"G. Morteani, A. Voropaev, V. A. Grinenko","doi":"10.1127/njma/2017/0062","DOIUrl":"https://doi.org/10.1127/njma/2017/0062","url":null,"abstract":"","PeriodicalId":51139,"journal":{"name":"Neues Jahrbuch Fur Mineralogie-Abhandlungen","volume":"1 1","pages":"279-296"},"PeriodicalIF":0.5,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89538867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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