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åç: Wikimedia Commons / Rob Lavinsky, iRocks.com
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åç: Wikimedia Commons / Rob Lavinsky, iRocks.com
ã³ã¬ã¯ã¿ãŒã¯çš®ã ãã§ãªãçµã¿åããã®é åãæ±ããŠæŠå±±ã¹ããµã«ã¿ã€ã³ã远ããŸããç£å°ããã®åäžã®å€ç«ããã¬ãŒãããã¯é åçã§ããåŸãŸãããã¯ã©ã·ãã¯ãªæšæ¬ã¯å»ºç¯çã§ãïŒç æ°Žæ¶ã«éžæçã«ç¹åšããã¬ãŒãããããããã¯ç¶ã®é·ç³ã®äžã«èŒãã¬ãŒãããã®å€èгããããã¯ãã«ãã¡ã€ã³ãèç³ããããŒãºã鲿¯ããªããŒã«-ANããŸãã¯ã¹ãªãªãŠã ãšãã£ãçãã䌎é±ç©ãšé¢é£ããã¬ãŒããããçŸããæšæ¬ã¯è²ãå æ²¢ãéæåºŠãé 眮ã察æ¯ããããŠç¹çްãªç æ°Žæ¶ã®å 端ãšã¬ãŒãããé¢ã®ä¿åç¶æ ã«åºã¥ããŠè©äŸ¡ãããŸãã## Featured Specimens
Search for specimens: View all garnet specimens from Wushan Spessartine Mine, Fujian, China
The locality is recorded as Wushan Spessartine Mine, Tongbei, Yunxiao County, Zhangzhou, Fujian, China, with coordinates near 23.90611 N, 117.19806 E. In Chinese locality usage the name appears as ä¹å±±é°é抎ç³ç¿, éå, äºéå¿, 挳å·åž, çŠå»ºç, äžåœ. The collector locality lies around Tongbei and Wushan, near Yunxiao, in a humid subtropical part of southeastern coastal China.
Geologically, the specimens are products of granitic miarolitic cavities rather than a conventional orebody. Wushan belongs to the southeastern China granitic province, where Cretaceous granites were emplaced in a tectonic setting linked to the Paleo-Pacific plate system. The Wushan, Jingangshan and related granitic plutons of coastal Fujian are aluminous A-type granites; the miarolitic pockets in these rocks provided the open spaces in which feldspar, smoky quartz and spessartine could crystallize freely.
The collecting story is complicated because âWushan Spessartine Mineâ became a market name for a group of occurrences. Specimens came from two or three principal areas: Tongbei near Yunxiao, Shuijingping in Yunxiao County, and the Yunling/Shiliu area in Zhangpu County, depending on the source and naming scheme used. The Tongbei-Wushan material is the classic trade reference, and most collectors use âWushanâ as shorthand for these Fujian spessartine-quartz-feldspar combinations.
The earliest Chinese spessartine specimens of this visual type appeared on the mineral market in 1998, at first reportedly labeled as Lechang, Guangdong. By late 2001, dealers began giving Fujian as the true province and Yunxiao as the nearest large place name. The locality quickly became one of the signature Chinese specimen discoveries of the late 1990s and early 2000s, because the pieces were abundant enough to reach the global market yet distinctive enough to be recognized across a room.
Mining and collecting were tied closely to granite extraction. The cavities were exposed in granite workings, and specimen recovery developed around those exposures. Later locality notes report that Wushan is now a protected national park and that collecting from exposed granite there is prohibited. Production from the Tongbei mine area is reported to have ceased in 2016; modern supply is therefore dominated by older stock, recirculated collection pieces, and occasional specimens from dealers rather than regular fresh production.泚ç®ãã¹ãçºèŠã«ã¯ã埮æé·ç³äžã®ãªã¬ã³ãžè²ã¹ããµã«ãã£ã³ã®å žåçãªæ¿ç¶çµæ¶ãã¬ãŒããã被èŠã®ç æ°Žæ¶çµæ¶ããã£ãããããµã€ãºã«éããç æ°Žæ¶çµæ¶ãèç³ã䌎ãçããã¹ããµã«ãã£ã³ããããŠçãããã«ãŽã¡ã€ã³ãå«ãçµã¿åãããæããããŸãã Tongbeiç£ã®çŽ æã¯ç¹ã«ãã«ãŽã¡ã€ã³ãšãããŒãºã«é¢é£ããŠãããèç³ã¯åºç¯ãªçŠå»ºçã®ã¹ããµã«ãã£ã³ç£å°ã®ç¹åŸŽã§ãããç¹ã«Fineã®Wushanã©ãã«æšæ¬ã«ãããŠéèŠã§ãã## ãã¯ã·ã¢çŠå»ºçã»æŠå±±ã¹ããµã«ãã£ã³é±å±±ã®ã¬ãŒãããã®ç¹åŸŽ
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å質ã¯ãã©ã³ã¹ã«äŸåãããæé«ã®æŠå±±( Wushan )æšæ¬ã¯ã飜åãããªã¬ã³ãžããèµ€æ©è²ã® colorãæããå æ²¢ãå·ã®ãªãéæãªã¬ãŒããããé·ç³ãç³è±ç æ°Žæ¶ãšã®ã³ã³ãã©ã¹ãã匷ããèªç¶ãªå€èгã®çµæ¶ååžã瀺ããããŸãã«ãå¯ã«èŠãããã¬ãŒãããã¯åæ§ã倱ãããšããããéã«åžèããããšèŠèŠçãªã€ã³ãã¯ããæ¬ ãããšããããæãå°è±¡çãªäœåã¯ãå°è³ªåŠçè«çãšå±ç€ºã®ãã©ãã®äž¡æ¹ãåããŠããïŒãã±ããå ã®æµäœãããããé 眮ããã¬ãŒãããã ãã粟巧ãªãããã¥ã¢é¢šæ¯ã®çµæãªãºã ã«æ²¿ã£ãŠé 眮ãããŠããã## Collector Notes
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ã¯ã·ã£ã³ã®è©±ã§æåã®é©ãã¯ã locality ãæ£çŽã«åä»ããããåã«ãã³ã¬ã¯ã¿ãŒã«å±ããããšã§ãã1998幎ãäžåœç£ã¬ãŒãããæšæ¬ãç æ°Žæ¶ãšæ£é·å²©ãšãšãã« Guangdongç Lechang ãšããç£å°åã§åžå Žã«çŸããŸããããŸã ããªãã¿ã®ã Tongbei ããã Wushan ãã®å®çªã§ã¯ãªããé®®ãããªãªã¬ã³ãžè²ã®çµæ¶ãšç æ°Žæ¶ãäŒŽãæ°ããåºæ¿çãªäžåœç£ã¹ããµã«ã¿ãªã³ã®çµåããšããŠçŸããã«ãããŸããã§ããã2001å¹Žã®æ«ããã«ãªã£ãŠåããŠã貎å·ãšé²éãäº€ææ å ±ãšããŠããæ£ç¢ºãªç£å°ãšããŠæµ®äžããŸããããã®æç¹ã§ãã³ã¬ã¯ã¿ãŒã¯èŠèŠçãªçœ²åããã§ã«èªèãå§ããŠããŸããã
次ã®é©ãã¯ããããæ¬åœã«é±å±±ã§ã¯ãªãã£ããšããäºå®ã§ãããWushan Spessartine MineïŒæŠå±±ã¹ããµã«ã¿ãªã³é±å±±ïŒããšããåŒç§°ã¯ãéããããåããããåäžã®äŸçµŠæºãããæ£åŒãªå Žæã®ããã«é¿ããŸãããããæŽå²ã¯ããç·©ããã§å žåçã«ã¯é±ç©åŠçã§ããåæšåãäžã®åãæã®åãè±åŽå²©æ¡æã«ãã£ãŠãã¢ããªãã£ãã¯ç©ºæŽãé²åºãã倿°ã®å°èп𡿡æå Žãæ¡ç³å ŽãBerthold Ottens ã®ç£å°ç ç©¶ãšåŸã® Mindat ã®ç£å°ããŒãã¯ãã¯ã·ã£ã³ãé±å±±ã®æŽç¶ãšããç¹èš±ã§ã¯ãªãæšæ¬å ŽãšããŠäŸ¿å©ãªã©ãã«ã«ãªã£ãããšãæããã«ããŸããçå£ãªã©ãã«ã¯ãŸããŸã Tongbei-Wushanãé²éãçŠå»º ãçšããåæšåãç¶æãã€ã€æèŠæš¡ã®çŸå®ãèªããŠããŸãã
Tongbei å°åããã®ç¹ã«çãçããšãã field note ã¯ãæã®å®¶ã ããã¢ããªãã£ãã¯è±åŽå²©èãå«ãè±åŽå²©ã§å»ºãŠãããŠããããšã§ããã³ã¬ã¯ã¿ãŒã«ãšã£ãŠãã®äžæã¯ã»ãŒæ»çšœã§ãïŒãã£ããããæšæ¬ãçã¿åºããåãå°è³ªç°å¢ããå°å ã®å»ºæãšããŠã䜿ãããŠããã®ã§ããå®ã¯é ãã®é«å±±ã®äºè£ãæ·±ã竪穎ã«é ãããŠããããã§ã¯ãªããæ¡ç³ã»å»ºèšã»å°èп𡿡æã«ãã£ãŠé²åºãããã±ããé±ç©ãååšããè±åŽå²©ã®é¢šæ¯ã®äžéšã§ããã
æ³çãªã¢ã¯ã»ã¹ã®è©±ã¯æ¥æ¿ã«å€åããŸãããåŸã®ç£å°ããŒãã¯ãTongbei ãå°åã§æåã®äœç³»çãªæšæ¬æ¡æãçºå±ãããå ŽæãšããŠæãäžæ¹ããããè±åŽå²©å»ºæã®æ¡æãšçµã³ã€ããªãéãåæ³çã«ã¯åçŽã§ã¯ãªãã£ãããšã匷調ããŸããçŸåšãæŠå±±ã¯ä¿è·ãããåœç«å ¬åãšããŠèª¬æãããé²åºããè±åŽå²©ããã®æ¡éã¯çŠããããŠããŸããã³ã¬ã¯ã¿ãŒã«ãšã£ãŠã¯éèŠã§ãçŸå°ã§æ°é®®ã§ç¢ºããªèµ·æºãæã€å€ãæšæ¬ãæŽå²çæšæ¬ãžãšå€ãããåãªãé åçãªåšåº«ä»¥äžã®äŸ¡å€ãæã€ããšã«ãªãããã§ãã
çç£ã«ãçµããããããŸããçŠå»ºçã®é±ç©å€æ§æ§è«æã¯ã Tongbei é±å±±ã2016幎ã«çç£ã忢ãããšå ±åããŠããŸãããã®æ¥ä»ã¯ä»æ¥ã®åžå Žã説æããã®ã«åœ¹ç«ã¡ãŸããæŠå±±ã¹ããµã«ã¿ãªã³ã¯çµ¶å¯Ÿçã«çšã§ã¯ãããŸããããçŽ20幎ã«ããã倿°ã®æšæ¬ãåžå Žãžæµå ¥ããŠããããå€å žçææã®æµãã¯æžå°ããŠããŸããä»ãåªããæšæ¬ãè³Œå ¥ããã³ã¬ã¯ã¿ãŒã¯ãçŸä»£ã®æŽ»çºãªãã±ããã§ã¯ãªããå倧ãªçç£æéããè³Œå ¥ããŠããããšãå€ãã®ã§ãã## Mineralogical Records & Publications
Ottens, Berthold. âTongbei Spessartine Localities, Fujian Province, China.â The Mineralogical Record, 36(1), 35â43, 2005. Tongbei/Wushanã¹ãºãµã«ã¿ã³ç³ç³»çµ±ã®äž»èŠç£å°èšäºã
Ottens, B. âPrÀchtiger Spessartin-Granat aus den Pegmatiten von Fujian, China.â Lapis, 28(4), 13â20, 2003. çŠå»ºçã®ã¹ãºãµã«ã¿ã³ç³è±åŽå²©ãã°ãã¿ã€ãææã®åæãã€ãèªè§£èª¬ã
Liu, Guanghua. Fine Minerals of China. Verlag AAA Minerals AG, Zug, 2006, 366 pp. çŠå»ºã®Wushan/Tongbeiãã£ãŒã«ãããã³é¢é£ããçŠå»ºçã¹ãºãµã«ã¿ã³ç³ç£å°ãå«ãéèŠãªäžåœé±ç©ç£å°åç §ã
Å tubÅa, Ján; Hanus, Radek; Fridrichová, Jana; BaÄÃk, Peter. âSpessartine from Tongbei, China.â The Journal of Gemmology, 38(1), 18â19, 2022. ãã¡ã»ãããããTongbeiã¹ãºãµã«ã¿ã³ç³ã«é¢ããå®ç³åŠã¡ã¢ãRIãSGãå å ç©ãã©ãã³ããã³UV-Vis-NIR芳å¯ãå«ãã
Antao, S. M.; Cruickshank, L. A. âCrystal structure refinements of tetragonal (OH,F)-rich spessartine and henritermierite garnets.â Acta Crystallographica Section B, 74, 104â114, 2018. OH-ããã³F-richã®Tongbeiã¹ãºãµã«ã¿ã³ç³ãåæ¹æ¶å¯Ÿç§°ã§å ±åããçµæ¶æ§é ç ç©¶ã
Zhao, L.; et al. âGeochronological, geochemical and NdâHf isotopic constraints on the petrogenesis of Late Cretaceous A-type granites from the southeastern coast of Fujian Province, South China.â Journal of Asian Earth Sciences, 105, 338â359, 2015. çŠå»ºçåéšæµ·å²žåã®Wushané¢é£è±åŽå²©äœã®å°åå°è³ªåŠçæ çµã¿ãšé±ç©åœ¢æããã»ã¹ã®å¶çŽã
Walsh, Kevin. âSome Aspects of the Mineral Diversity and Geoparks of Fujian Province, China.â 2017. Wushané±åºãå«ãå°åã®é±ç©å€æ§æ§ãš Geopark ã®èŠçŽ ãçµæ¶åœ¢ç¶ãé¢é£é±ç©ãTongbeiã®çç£åæ¢ã«ã€ããŠã®æçšãªç·æ¬ã## ãããªãèªã¿ç©ãšå€éšãªã³ã¯
Mindat ããŒã«ãªãã£ããŒãž: æŠå±±ã¹ããµã«ã¿ã€ã³é±å±±ãååãäºéçãæŒ³å·åžãçŠå»ºçãäžåœ â åºéšã®ããŒã«ãªãã£ããŒã¿ããŒã¹ãšã³ããªã§ã座æšãé±ç©ãªã¹ããå±¥æŽããŒããšåç §æ å ±ãå«ãã
Mindat åºçŸããŒãž: æŠå±±ã¹ããµã«ã¿ã€ã³é±å±±ã®ã¹ããµã«ã¿ã€ã³ â ããŒã«ãªãã£ã«ãããã¹ããµã«ã¿ã€ã³ã®ç¹å®çš®ã®åºçŸããŒãžãçè²ç¶æ³ãè²ãé¢é£é±ç©ãå«ãã
Mindat èšäº: Olav RevheimãâSpessartineâ â æŠå±±/ååã«é¢ããç°¡æœãªè°è«ãšãçµæ¶ãµã€ãºãšå質ã«é¢ããã³ã¬ã¯ã¿ãŒåãã³ã¡ã³ããå«ãã
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Mineralogical Record 第36å·» 第1å·, 2005 â Berthold Ottens ã® Tongbei ã¹ããµã«ã¿ã€ã³è«æãå«ãäžåœå·ã®ããã¯ã»ã€ã·ã¥ãŒãªã¹ãã
ResearchGate: âSpessartine from Tongbei, Chinaâ â 2022幎㮠Journal of Gemmology ã«ãããååç¶ Tongbei ã¹ããµã«ã¿ã€ã³ã«é¢ããããŒãã®å ¬éããã¹ãã
IUCr: âCrystal structure refinements of tetragonal (OH,F)-rich spessartine and henritermierite garnetsâ â OH ããã³ F 嫿ã«å¯ã Tongbei ã¹ããµã«ã¿ã€ã³ã®æè¡ççµæ¶æ§é ããŒã¿ã
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