Pasir putih tersebar dimana-mana di Indonesia, terutama pada daerah-daerah granit. Pasir yang berasal dari granit, selain memang kaya silika, bisa juga kaya akan timah, mineral-mineral Nb-Ta, juga zircon dan monazit yang bisa mengandung U, Th dan REE! Export pasir ke Singapura, jangan-jangan bukan untuk "ngurug", tapi bisa jadi diambil unsur-unsur berharga! Pasir Ngrayong terus "ngglontor" seiring berjalan waktu dan bersamaan dengan eksport pasir kuarsa "bermineral berat" untuk "ngurug"..Kapan Indonesia bisa lepas dari "status" negara berkembang..ya...kalau export " tanah air terus..
Alhamdulillah sudah pindah semua. > > Thanks. Iman > > -----Original Message----- > From: Setiabudi Djaelani [mailto:setiabudi.djael...@energi-mp.com] > Sent: Friday, January 22, 2010 7:08 AM > To: 'iagi-net@iagi.or.id' > Subject: RE: [iagi-net-l] Fwd: JAM PASIR NGRAYONG > > Kang Iman (MEDCO) sudah pindah ke Energy Center Sudirman ? > > Salam, > Setiabudi > > -----Original Message----- > From: RM Iman Argakoesoemah [mailto:iman.argakoesoe...@medcoenergi.com] > Sent: Friday, January 22, 2010 7:02 AM > To: iagi-net@iagi.or.id > Subject: RE: [iagi-net-l] Fwd: JAM PASIR NGRAYONG > > Kalau semua orang bikin, nanti pasir di Lab habis dong ........ ?? > > Thanks. Iman > > -----Original Message----- > From: Paulus Tangke Allo [mailto:paulu...@gmail.com] > Sent: Thursday, January 21, 2010 3:49 PM > To: iagi-net > Subject: [iagi-net-l] Fwd: JAM PASIR NGRAYONG > > ---------- Forwarded message ---------- > From: Andri SS Mubandi <andri...@gmail.com> > > > Menanggapi rengekan anak saya yang masih duduk dibangku SD untuk dibuatkan > mainan jam pasir, memaksa saya untuk cari ide memanfaatkan limbah botol > plastik kemasan disekitar dapur! Botol plastik bekas ternyata ketika > dicari malah tidak ketemu, padahal biasanya "pabalatak" disekitar dapur > atau meja. > > Ketika didapatkan, besar dan bentuk botolpun berbeda-beda > bentuknya...namun untungnya kepalanya sama..dan bertutup ..he..he ini yang > penting! Lalu atap tutup saling dirapatkan dengan power glue..tunggu > sampai rekat dan kering..kemudian dilubangi bagian atapnya hingga tembus > dengan diameter 3-5mm. > > Botol seterusnya diisi pasir kuarsa halus. Pasir ini saya minta dari Lab > Sandbox Prodi Geologi. Pasirnya berasal dari Formasi Ngrayong Jawa Tengah! > Ternyata cukup unik mengamati jam pasir berbeda bejana, selain eksperiman > waktu "menggelontor"nya dan pengendapan pasir, bisa nampak juga bagaimana > kelakuan aliran pasir di bidang miring dan berliku-liku. > > Selain kita bisa amati juga "mini subsidence" atau amblesan dari berbagai > sudut jatuhnya pasir..Nah sementara ini durasi jam pasirnya sekitar 5 > menit, lumayanlah buat disiplin waktu baca koran dan "facebook" an..! > > Pada attachment adalah foto JAM PASIR NGRAYONG Mungkin bisa dibikin > durasinya 100 harian, lumayan buat pantau kabinet ESBEYE.. > > > Salam > Andri S > > Keep it on screen - think before you print > > This e-mail and any information contained are confidential and legally > privileged. It is intended solely for the use of the individual or entity > to whom it is addressed and others authorized to receive it. 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