GEOLOGI&KARANGSAMBUNG& BAGIAN&UTARA&
Nugroho&Imam&Se8awan& Jurusan&Teknik&Geologi&UGM& Kuliah&Lapangan&Geofisika&UGM&2014&
Lokasi'Karangsambung'
Smyth'et'al.'(2005)'
Tektonik'Karangsambung'dalam'global'
Tektonik'Karangsambung'
Prasetyadi'(2007)'
[1]&Ban8mala&Complex& ! Eclogite'and'GrtBGln'rock:' 1.8–2.4'GPa'at'580–650'ºC' (Miyazaki'et'al.,'1996)' ! JdBGrtBQz'rock:' >2.7'GPa'at'720–760'ºC' (Parkinson,'1998)' ' [2]&Luk&Ulo&Complex& ! Eclogite:' 2.0–2.3'GPa'at'365–410'ºC' (Kadarusman'et'al.,'2007)' ! JdBQzBGln'rock' 2.2'±'0.2'GPa'at'530'±'40'ºC' (Miyazaki'et'al.,'1998)' ' [3]&Meratus&Complex& ! Mg'CtdBbg.'whiteschist' ~1.8'GPa' (Parkinson'et'al.,'1998)'
SeVawan'(2013)'
Parkinson'(1998)'
Peta'geologi'Karangsambung'
Prasetyadi'(2007)'
StraVgrafi'daerah'Karangsambung' Perselingan'batupasirB batulempung,'napal,' kalkarenit,'dan'tuff' Breksi'vulkanik,' batupasir'dan'lensa' batugamping' Breksi'lempung'dengan' fragmen'basalt,' batugamping' nummulites,'batupasir,' konglomerat'dan'batuan' vulkanik'Dakah'
Lempung'bersisik' dengan'lensa' batugamping' nummulites,' konglomerat'polimik,' batupasir,'batuan' vulkanik'(Sedimen' melange)' Unit'Metamorfik,' metasedimen'dan'ofiolit'
Karangsambung' bagian'utara'
KOMPLEK MELANGE LUK-ULO Eklogit
Gabro
“Boudin”
Rijang
KS-208
Matrik
Serpentinit
Koleksi'foto'C.'Prasetyadi'
Kompleks'melange' Batuan Beku LAVA BASALT dengan struktur bantal (pillow)
Batuan Sedimen RIJANG dan BATUGAMPING MERAH
Edi Hidayat-LIPI Karangsambung
Koleksi'foto'Edi'Hidayat'
Laut'dalam' Umur'Radiolaria:'Kapur'Awal'–'Akhir' (Wakita'et'al.,'1994)'
Gabro'di'S.'Lokidang'
Koleksi'foto'Edi'Hidayat' Prasetyadi'(2007)'
S.'Muncar'
Grt'sekis'biru'
Batuan' metamorf'di' Karangsambung' SerpenVnite'Pucangan'
Koleksi'foto'C.'Prasetyadi' Grt'sekis'mika'
S.'Loning'
Koleksi'foto'Edi'Hidayat'
Koleksi'foto'Edi'Hidayat'
Batuan'metamorf'di'Karangsambung'
Table 5-1. Summary of the protolith from metabasic rocks from South Sulawesi and Central Java Locality Rock Type OIB N-MORB E-MORB ARC (n) South Sulawesi Eclogite Grt-Gln schist Ep-Gln schist
(2) – (2)
(7) (3) –
(3) (5) –
(2) (1) (2)
14 9 5
Central Java
(1) (5) (3) – –
– – – (3) (2)
– – (1) (1) –
– – – – –
1 5 4 4 2
Eclogite Grt-Gln schist Ep-Gln schist Grt amphibolite Amphibolite ! : present, – : absent
(3)'
SeVawan'(2013)'
Petrografi'
SeVawan'(2013)'
Petrografi'OmpBbg.'GrtBGln'schist'
Ilm'
SeVawan'(2013)'
Summary'of'mineral'parageneses' of'the'eclogite,'OmpBbg.'GrtBGln'schist,'and'Grt'amphibolite' from'Luk'Ulo'Complex'
+Ph2
SeVawan'(2013)'
P"T'evoluVon'of'OmpBbg.'GrtBGln'schist'from'Luk'Ulo'Complex' Prograde&stage:&
! Minimum'temperature:' Omp'+'Lws'='Gln'+'Ep'+'Qz'+'H2O'[1]'(Evans,'1990)'"'300– 500'ºC'at'0.8–1.9'GPa' ! Maximum'temperature:' Stability'field'of'Gln'[2]'(Maresch,'1977)'550ºC'above'1'GPa' ! Maximum'pressure:' Ep'+'Ttn'='Grt'(mantle)'+'Rt'+'Qz'+'H2O'[3]&(Manning'and' Bohlen,'1991)'"'300–600'ºC'at'1.8–1.6'GPa' '
Prograde&stage:&
Gln'+'Ep'='Grt'(rim)'+'Omp'+'Qz'+'H2O'[4]'(Evans,'1990)'"' 500–550'ºC'at'1.3–1.9'GPa'
& Peak:&
! Temperature:' GrtBCpx'geothermometry'Ravna'(2000),'Powell'(1985),'Ellis' and'Green'(1979)' ! Pressure:' GrtBCpxBPh'geobarometry'Carswell'et'al.'(1997),'Ravna'and' Terry'(2004)' " 473–557ºC'at'2.1–2.3'GPa'
Retrograde:&
PetrogeneVc'grids'from'Evans'(1990)'
! Jd'+'Qz'='Ab'[5]&(Holland,'1993)'"'400–600'ºC'at'1.0– 1.3'GPa' ! Solid'soluVon'diagram'of'amphibole'[6]&(Otsuki'and' Banno,'1990)' NaBCa'amp'+'Ep'+'Qz'+'H2O'='Act'+'Ab'+'Chl'
SeVawan'(2013)'
Kompilasi'P"T'diagram'high" pressure,metamorphic,rocks, dari'Indonesia'bagian'tengah'
SeVawan'(2013)' PetrogeneVc'grids'from'Oh'and'Liu'(1998)'
Mekanisme'pengangkatan'batuan'metamorf'tekanan'Vnggi'
• The' eclogiteBfacies' metamorphic' rocks' were' subducted' ' correspond' to' the' depth' of' 90' km' beneath' conVnental' crust' of' Sundaland.' • The' HighBpressure' metamorphic' rocks' in' BanVmala' and' Luk' Ulo' complexes' are' enclosed'in'sheared'serpenVnite.' • The' serpenVnites' are' extremely' buoyant' with'respect'to'the'oceanic'crust'that'have' been' transformed' to' eclogites' during' subducVon'and'increasing'their'density.' • SerpenVnites' might' be' counterBbalancing' the' negaVve' buoyancy,' decouple' and' SeVawan'(2013)' facilitate' exhumaVon' of' the' highBpressure' rocks' during' a' conVnued' subducVon' process.'
Volkanik'Dakah'Karangsambung'
SeVawan'(2010)'
KBAr'' • 39.86'±'3.31'Jtl'(diabas' G.'Parang)'' • 37.55'±'1.96'(basalt' andesit'G.'Bujil)'' • 26.52'±'1.93'Jtl'(diabas' Trenggulun'Kidul)'' • (Eosen'AkhirBOligosen' Akhir)'(Soeria'Atmadja,' dkk.,'1994)'
Kali'Jebug'
G.'Parang'
Analisa'geokimia:' Berasal'dari'magma'koB geneVs'berafinitas'toleit' busur'kepulauan' (SeVawan,'2010)'
Kali'Jebug' hornfels'
SeVawan'(2010)'
Model'geologi'volkanik'Dakah'
SeVawan'(2010)'
FORMASI(KARANGSAMBUNG( SCALY&(SLATY&CLEAVAGES)&
PINCH&&&SWELL&/&BOUDINAGES&
FORMASI(TOTOGAN( BASALTIC&BRECCIAS&
CLAY&BRECCIA&
Koleksi'foto'C.'Prasetyadi'
MODEL(PENGENDAPAN(FORMASI(KARANGSAMBUNG(
SENSOR&
*'TERIMA'KASIH'*'
