(1) 石灰岩と泥岩層を切る正断層


(2) 正断層運動を伴って形成した方解析の脈と石灰岩起源の断層礫岩


(3) 約50 cmの変位を示す正断層。断層面上に明瞭な鉱物ファイバー線構造は見られる。


(4) 断層面で見られるファイバーの拡大写真

トリノ科学院の主要な建物の中


授賞式後


賞状は全部ラテン語


地質学関連：トリノ近くに分布するドラマイラ岩体から採取された10 cm程度のパイロープ成分に富むガーネット結晶を含む片麻岩. これらの岩石は石英の高圧多形であるコース石を含む。

Why I applied for a JSPS Fellowship
My PhD focuses on modelling the composition of magmatic hydrothermal fluids that are responsible for ore-formation. The challenge for conventional mining practices is that this process of ore formation takes tens of thousands of years. Supercritical geothermal power plants are unique locations where super-heated magmatically-derived fluids are extracted for the purpose of providing a more efficient renewable energy source. What if we could harness an array of economically important metals like Cu from these fluids and co-produce geothermal energy? The utility of these fluids as multipurpose resources is actively being explored for extraction of metals like silica and lithium.

Geothermal energy is a promising renewable energy source in Japan and an ideal location to investigate this research, therefore I applied to a JSPS fellowship. There are a few fellowship to choose from that vary in length and fellow-type. I was awarded a predoctoral short-term fellowship which funded my research for 6 months in Japan. This research focused specifically on understanding the origins of metal enrichment in high temperature fluids from a supercritical geothermal power plant in Japan (Kakkonda) and how they compare to fluids exsolving from local magmatic systems (Iwate). As such we devised a detailed geochemical study that focused on analysis of whole rock and olivine hosted melt inclusions.

JSPS research and funded opportunities:
The JSPS funding enabled me to plan a field study to Mount Iwate with myself and members of my host research group (Figure 1). Samples from the most recent eruptions at Mount Iwate have not yet been analysed geochemically, hence our research will provide novel data for this eruption. After fieldwork was complete, samples were prepared for a melt inclusion study. This required whole rocks to be crushed and sieved into different size fractions. Olivine phenocrysts were individually picked, mounted, and polished before being set in epoxy discs and finely polished, ready for SEM imaging and EPMA analysis.

Outside of research I had to the opportunity to attend the Water-Rock Interaction Conference in Sendai where I chaired my first conference and presented some new research that I had been developing during my time in Japan (Figure 2). I was also able to meet people that are involved in the geothermal industry here in Japan and as a result myself and host supervisor were able to organise a tour around the Kakkonda Geothermal Power Plant. This was a real highlight of my time in Japan as I was given the unique opportunity to witness the real life application of my research.

Figure 1: Iwate fieldtrip

Figure 2: Conference with Research Group


Life in Japan:
Having never travelled to Japan before, I arrived during the infamous Sakura season where streets and parks are filled with cherry blossom trees and shops are bursting with Sakura themed food, drinks and omiyage (Figure 3). One of the most invaluable opportunities provided by the University of Tokyo was the free Japanese language courses which really helped me navigate daily life a little easier! Tokyo is not short of local festivals and historic temples and shrines which were a great way to experience the rich traditions of Japanese culture. I had heard about how the city transforms from day to night but seeing the vast array of neon lights in all the bustling pockets of Tokyo was an experience like no other (Figure 4). But if you feel you need to escape the hustle of busy Tokyo life, you are just a short train or flight away from the mountains and volcanoes (Figure 5). I truly enjoyed my time here at Todai and in Tokyo and cannot wait to return.

Figure 3: Mount Fuji during sakura season

Figure 4: Shibuya from above

Figure 5: Mount Aso, Kyushu

1) SW, Takayoshi Nagaya and Olivia Hogg chaired a session. The meeting was also attended by Shogo Soejima and Takayuki Morohoshi.

2) Olivia won a prize for her presentation

3) Crater lake seen from the top of Mt Zao.

4) A stone monument near the summit commemorating the way in which Date Munetaka appeased the volcano gods, which has now damaged by lightening

Photo 1: Necking of a dolomite layer surrounded by quartzite, Makerni Spitze.

Photo 2: Kaiser Franz Josefs glacier or ‘Pasterze’ with a U-shaped valley, lateral and frontal moraine deposits visible.
The glacier has retreated 2.5 km over the last 150 years.

Photo 3: Augengneiss typical of the basement units of the Pennine domain.

Photo 4: View of the main field area looking west.

1) 極浅いところで堆積したtrench slope地層
　シルト岩でも空撃率は50％まで！

2) 海底地滑りの影響でできた大きな褶曲構造

3) マイロナイトなどの変成岩類で見られるデルタタイプクラストのような 構造。左ずれの剪断を示す。

4) 綺麗なシアバンドのような組織もあり。ここでは右ズレを示す。

採石場

筑波山山頂

岐阜県七宗町飛騨川沿いでジュラ紀付加帯の一部である上麻生礫岩とその上位・下位のタービダイトおよびスランプ堆積物を観察・記載

砂泥質な海溝充填堆積物に挟まれる厚さ2 m余りの上麻生礫岩 Cg.I層（折尺より左側; Adachi 1971）。地層は高角度で傾斜し、周囲のタービダイトで観察される級化層理や荷重痕などの堆積構造からは地層の上位が画像右側であることが分かる。

Cg.I層はスランプ堆積物に挟まれており、砂泥互層の破断や褶曲などの未固結堆積物の変形など多様な堆積構造が認められる。

上麻生礫岩に含まれる片麻岩礫の年代測定から20億年以上前の形成年代が示され、発見当時は日本最古の岩石であったため、露頭からほど近い場所に「日本最古の石博物館」が建てられた。

１）2022年2月
四国調査


２）2022年8月
山口研のみなさん(東大・大気海洋研)と合同で四国巡検を行いました。
青矢さん(徳島大)や福地さん(鳴門教育大)も現地で合流していただきました！ありがとうございました！




３）2022年9月　SFWS2022
奈良での国際ワークショップの後、巡検に参加させていただきました！企画・運営・案内など実現していただいた、みなさんありがとうございました！

米国西部に分布するフランシスカン帯における野外調査


Diablo Range北部のDel Puerto Canyonの蛇紋岩露頭.
左下の暗色岩はBlack serpentiniteと呼ばれ、Coast Range ophioliteの基部の剪断帯を構成している。


地下約30kmでの高圧変成作用を被った変成砂岩 (@ Del puerto canyon).
岩石中に変形した石英脈が広く分布し、深部での広域的な流体の浸透と石英の沈殿が示唆される。


Mt. Hamiltonでのサンプリング. 今回の調査での多くのサンプルはこのような路肩で採集された.


Tibron PeninsulaのRing Mountain. 写真中央部のような塊状の蛇紋岩や蛇紋岩マトリックスメランジュの露頭やブルーシスト相の後退変成作用を被ったエクロジャイトが分布している.


Ring Mountainのブルーシストエクロジャイト. この露頭周辺でローソナイト(白色短冊状の結晶)が初めて記載された(Ransome, 1894). ローソナイトは高圧下で成長するため、結晶中の周囲とまっすぐに連続した面構造は、面構造がローソナイトの形成前すなわち沈み込み時にできたことを示唆する.


褶曲を含むブルーシストブロック. 周囲の蛇紋岩メランジュの平坦な地形の中に、このような侵食に強いブロックが点々とみられる. これらの高変成ブロックが記録する反時計回り(等圧減温)のP-T経路は、フランシスカンの沈み込み初期の温度構造の変化を反映している.


ブルーシスト中の褶曲したエクロジャイトレイヤー（オンファス輝石と柘榴石）.レイヤーの厚さは約3cm.


San Franciscoの観光地、Fisherman’s Wharf.